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2015 Energy Code (as Opportunity)
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Discipline
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Learning
When someone makes your skin crawl they are either full of it or you are about to learn something You have a choice: -
Write them off (easy path)
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Listen closely (much harder)
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Choosing a Path: Chaplain Israel Yost
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Building science was like that for me…
You have a choice of paths
I decided to listen more closely…
Code compliance (pretty easy path, all three of them…)
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High performance as a business opportunity (maybe harder initially but...)
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Blue:
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Purple: CZ7
CZ6
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Michigan State and County Level Map
Code Resource Center
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Understanding Energy Codes: Compliance Paths
Mandatory Requirements must be met in every building design regardless of compliance path.
Mandatory: Key Elements
Energy Rating Index (new for 2015)
Flexible; allows tradeoffs.
Simpler; still flexible. Incl. ERI method or RESNET, Energy Star 3.1, Passivehaus,
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Follow a menu of requirements.
Performance (systems)
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Mandatory: Key Elements
AIR SEALING REQUIREMENTS (Mandatory)
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AIR SEALING REQUIREMENTS (Mandatory) N1102.4 (R402.4) Air Leakage (Mandatory).
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N1102.4 (R402.4) Air Leakage (Mandatory)
The building thermal envelope shall be constructed to limit air leakage in accordance with the requirements of Sections N1102.4.1 through N1102.4.5.
• •
All joints, seams and penetrations. Site-built windows, doors and skylights. Openings between window and door assemblies and their respective jambs and framing. Utility penetrations. Dropped ceilings or chases adjacent to the thermal envelope.
Testing required: No more than 3 ACH50
• • • •
Knee walls. Walls and ceilings separating a garage from conditioned spaces. Behind tubs and showers on exterior walls. Common walls between dwelling units.
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Code may require a third-party inspector, and also may specify who can do it: • HERS Rater • HERS Rating Field Inspector • BPI Certified Professional • BBRS approved third party
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Mandatory: Key Elements
Mandatory: Key Elements
N1103.3.2 (R403.3.2) Sealing (Mandatory) Ducts, air handlers and filter boxes shall be sealed.
DUCTS
Window Air Leakage (AL) 0.3 cfm/sf (cubic feet per minute per square foot of window area)
Exception: Ducts located completely inside the building thermal envelope.
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N1103.3.5 (R403.3.5) Building Cavities (Mandatory). Framing cavities shall not be used as ducts or plenums.
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N1103.3.3 (R403.3.3) Duct Testing (Mandatory) 1. Rough-in test: Total leakage less than or equal to 4 cfm per 100 square feet of conditioned floor area.
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HVAC load calculation standard vs‌
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Mandatory: Key Elements HVAC: ACCA Manual J
2. Post-construction test: Total leakage less than or equal to 4 cfm per 100 square feet of conditioned floor area.
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Mandatory: Key Elements
Mandatory: Key Elements
MECHANICAL VENTILATION
MECHANICAL VENTILATION
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INSULATION REQUIREMENTS: Above Grade
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Understanding Energy Codes
Energy Code 2015: Vapor retarders
INSULATION REQUIREMENTS: Above Grade
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Energy Code 2015: Vapor retarders
Energy Code 2015: Vapor retarders
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Energy Code 2015: Vapor retarders
Understanding Energy Codes
Key Take-Aways The evolving energy code is becoming more challenging
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Code now reflects more complex building science
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Prescriptive path (component based): Must follow the entire code to avoid risk
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Performance or ERI (both system based). Affords more flexibility and more opportunity.
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Up Next: My buddy Steve – Defining High Performance
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“It's unwise to pay too much, but it's worse to pay too little. When you pay too much, you lose a little money ‐ that's all. When you pay too little, you sometimes lose everything, because the thing you bought was incapable of doing the thing it was bought to do. The common law of business balance prohibits paying a little and getting a lot ‐ it can't be done. If you deal with the lowest bidder, it is well to add something for the risk you run, and if you do that you will have enough to pay for something better.”
WELCOME HOMEBUILDING CROSSROADS FALL 2017
John Ruskin
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HIGH PERFORMANCE
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HomeBuilding Crossroads FALL 2017
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DEFINED
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CASE
Where Are YOU? Does it REALLY matter?
Energy Efficiency
Indoor Air Quality
Resource Efficiency
Durability
Water Efficiency
Value / Quality
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HIGH PERFORMANCE
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for
High Performance Labels “While Labels present a relative comparison of position – for me, HP is the balance of budget / performance and
“If it don’t last – it doesn’t really matter”
HomeBuilding Crossroads FALL 2017
the Opportunity to set oneself apart from the rest”
HomeBuilding Crossroads FALL 2017
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9/25/2017
Do you know who your client is? Do you know what their expectations are? Do you have a minimum expectation?
Final Choices Modest Advances Low Hanging Fruit
As the level of Advancement and Opportunity in Performance increases – inversely proportional – the Cost increases
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The Goal isn’t to deliver the most exceptional performance everytime – but rather be prepared to answer the question
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WHAT’s NEXT?
HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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Label?? Perfomance Metric?? Or Component?? Where’s your Roadmap taking YOU??
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The Education
Some Current CHALLENGES
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One of the PROBLEMS with our industry is that we tend to believe and receive our education “Old School”…….
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- Code - Materials - Assemblies - Workmanship - CLIENT DESIRE - Performance - CLIENT SATISFACTION
Past Thinking…………..…………
R 12+26 = 30 NEW
OLD
while our actual necessity to keep up requires “New School”…..
Current Thinking R 10+10 = 30 HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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“INTEGRATION” not “Application” Many of the SERVICES required need to be PLANNED FOR (especially SOG Foundations)
And of course, there is always the CHALLENGE of Theory vs Practice
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Historically for Some – Change Heightens Risk
HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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Sometimes our history CHALLENGES our desire to make change
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FOUR Components of High Performance
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25% / 15% 25% / 55%
25% / 15%
The Four Barriers of Control in Order of Priority // Control provides increased Durability, Comfort, Health, and Energy Efficiency
High Performance = Control
25% / 15% Considered EQUAL at Conception, As IMPROVEMENT to any Component increases, the Contribution of the Other Components – REGRESSES……..High Performance Decision making requires PROPORTIONATE Advancement HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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9/25/2017
Energy Efficiency is a Two Headed Monster
Existing
Renovated
2. Hold onto it as long as you can HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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1. Create / Convert your Energy as inexpensive as possible
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PROPORTIONATE and CONTINUOUS
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5 40
(20)
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Don’t forget the potential for OVERHEATING
HomeBuilding Crossroads FALL 2017
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WHOLE WALL R‐VALUE “Proportionate AND Continuous – the MATH”
40 (38)
Thermal Control
(49) 3 (.32) 21/6 (13/5)
Proportional and Continuous
10 (10)
WHOLE WALL
ADD R‐6.5 CONTINUOUS
2x4 16”oc (22%) // R‐3 window (15%) // R‐15 Cavity (63%)
R‐7.0
R‐11.3 (61%)
2x6 16”oc (22%) // R‐3 window (15%) // R‐19 Cavity (63%)
R‐8.7
R‐12.6 (44%)
2x6 16”oc (14%) // R‐3 window (15%) // R‐21 Cavity (71%)
R‐9.6
R‐13.5 (41%)
WALL SPECIFICATIONS (INCREASE TO R‐5 WINDOW)
WHOLE WALL
INCREASE TO R‐7.5 WINDOW
2x6 16”oc (20%) // R‐5 win (15%) // R‐21 + 6.5 CONT (65%)
R‐14.6
R‐17.1 (17%)
2x6 16”oc (20%) // R‐5 win (15%) // R‐21 + 13 CONT (65%)
R‐16.9
R‐20.3 (20%)
2x8 24”oc (15%) // R‐5 win (15%) // R‐28 + 13 CONT (70%)
R‐18.6
R‐22.8 (23%)
HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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WALL SPECIFICATIONS
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Sierra Pacific Aspen Casement
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Tripane Casement or DH U .23 (R‐4.3) Domestically Produced Historical References 5/8” Mutins
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MARVIN Tripane ‐ ‐ ‐ ‐
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‐ Triple Glazed Low‐E Argon filled U .16 (R‐6.25) ‐ Sash increased to 2 ¼” for 1 3/8” IGU Q Are triple pane windows the best? The more panes the better, right?
‐ ‐ ‐ ‐
A Not always. Triple‐pane windows work best when enhanced energy performance is a key objective. Tripane offers a range of low‐E configurations for greater Solar Heat Gain control, including panes filled with argon or krypton‐argon gas for added efficiency. But no matter how many panes there are, if the window is poorly constructed, poorly installed or allows air leakage, it will not be efficient. HomeBuilding Crossroads FALL 2017
Competitively Priced – Custom Accommodating Sustainable Forestry Initiative = LEED Points Domestically Produced – Co‐Generation Plants 75 Colors – 30 year Warranty
HomeBuilding Crossroads FALL 2017
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“ADVANCED Framing”
HomeBuilding Crossroads FALL 2017
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General Advanced Framing Photos
S Truss Header
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Re-Locate to Nearest King Stud as Possible
HomeBuilding Crossroads FALL 2017
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Durability is about the Right and Wrong Decisions in DESIGN
Durability BEGINS with WORKMANSHIP / EDUCATION
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EN Building can ONLY be under ventilated All Buildings SHOULD PASS the RED LINE test
AREA of INITIAL Concern
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TOO TIGHT – a
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No Building can be
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Airtightness
Highest Exfiltration Pressure
Neutral Pressure Plane
R402.4.1.2 Testing The Building or Dwelling unit shall be tested and verified as having an air leakage rate not exceeding
THREE air changes per There are areas where the AIR BARRIER my be multiple components
hour in Climate Zones 3 Thru 8 HomeBuilding Crossroads FALL 2017
Airtightness Air Tightness Pressures VARY Along the Building Envelope
Highest Infiltration Pressure AREA of INITIAL Concern HomeBuilding Crossroads FALL 2017
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My SECRET Is OUT!!
4 Formal Blower Door Tests and 1 Fog Test
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1. 32 cfm at 50Pa (.16 Ach50Pa)
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2. 25 cfm at 50Pa (.12 Ach50Pa) 4. 116 cfm at 50Pa (.56 Ach50Pa) HomeBuilding Crossroads FALL 2017
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3. 104 cfm at 50Pa (.51 Ach50Pa)
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VAPOR – It challenges everything……Durability, Health, Comfort, Energy Efficiency……Success balances in a degree or two…
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PASSIVE HOUSE BLOWER DOOR FINAL TEST (AVG ‐POS/NEG) ach50 Pa
.16
.32
HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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R702.7 Vapor Retarders – Class I or II vapor retarders are required on the interior side of frame walls in Climate Zones – Marine 4, 5, 6, 7, and 8. R702.7.1 Class III Vapor Retarders – Class III vapor retarders shall be permitted where any one of the conditions in Table 702.7.1 is met
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Class I ‐ .1 perms or less Class II ‐ .1<perm<= 1.0 Class III – 1.0,perm<10
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It’s not that High Performance Houses cost too much; it’s that our idea of a fairly priced new home is based on a history of building houses to meet embarrassingly Low Performance benchmarks.”
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Code Questions
“Baczek”
HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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Homebuilding Crossroads: 2015 Energy Code and High Performance Building Science Foundation – Keeping Our Homes Safe and Sound
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Full disclosure…
• Study of how heat, air, and moisture move in, around, and through buildings • How stuff gets wet and dries (or not…) • Moisture and heat flows are linked; this is not an option, it’s the LAW • High performance builders: manage heat & moisture with equal intensity
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Proof Positive
How many ways can a building get wet?
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How many ways can a building assembly get wet?
â&#x20AC;˘ leak, inside or out
â&#x20AC;˘ Bulk water
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How many ways can a building get wet?
Photo: Berger Building Products
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Weather-lapped Flashing
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How many ways can a building assembly get wet?
• Wicking
Cap Break
• capillarity of porous materials
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How many ways can a building assembly get wet?
â&#x20AC;˘ Air leak
â&#x20AC;˘ Convection
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How many ways can a building get wet?
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Air Seal
Summer basement conditions, bare dirt floor: Air Temperature = 66 F Relative Humidity = 91% Dewpoint temperature = 63.5
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How many ways can a building assembly get wet?
Decouple soil moisture from space
• interior-exterior gradients, created by space conditioning & climate
• Diffusion
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• #1 – bulk water • #2 – capillary water • #3 – air-transported moisture • #4 – diffusive moisture movement
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• leak, inside or out • capillarity of porous materials • air leak • interior-exterior gradients, created by space conditioning & climate
Prioritizing moisture movement
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How many ways can a building assembly dry? • Free drainage • Convection • Diffusion
Once wet, how does the inside of a wall like this dry?
• Space • Air Pathway and driving force • Evaporation
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• Block • Lathing • Plaster
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Drying Potential of Building Assemblies
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Why We Care About the Vapor Permeability of Building Materials
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How many layers in today’s “typical” wall? • Exterior finish
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Three…
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Six, seven and eight…
Four and five…
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• Exterior finish • Cladding • WRB • Sheathing • Framing
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Vapor Profile
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Nine and ten.
1. Determine vapor permeability of each component of assembly 2. Identify least vapor permeable component(s) 3. Assess direction and extent of vapor drive: interior/exterior temperature difference, interior/exterior relative humidities (remember always high to low) 4. Identify/assess drying direction & potential
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Moisture profile rather than vapor profile?
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Representative Vapor Permeability Info
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Dry Cup
Wet Cup
Comments
Plywood
.75
3.5
Semi-permeable
OSB
.75
2
Semi-
Fiberboard (AI)
14.5
15
Permeable
Thermo Ply
0.5
0.6
impermeable
XPS
1
1
Semi (but with skin, im-)
EPS
5
5
Semi-
6-mil poly
.06
.06
Impermeable
Kraft paper
1
5 - 10
Semi- (variable)
MemBrain™
1
10+
Variable, by design
Tyvek®
14
?
permeable
Latex paint (primer + 1 coat)
3.6
6
Semi-
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Vapor Profile: Example 1
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1. Vinyl wallpaper - <0.1 perms 2. Wall board - 40 3. Cellulose - 75 4. Foil-faced polyiso - <0.1 5. Vinyl siding - “60” Least permeable (in fact, impermeable): 1 & 4
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1. Latex paint - 17 perms 2. Wall board - 40 3. Cellulose - 75 4. XPS 1 5. Air space - “300” 6. Wood siding - “35” 7. Oil-based paint - 0.6 Least permeable (other than 7): 4. XPS
Vapor Profile: Example 2
5
3 2 1
4
40
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Hygrothermal Balance
Connecting High Performance, the new Code, and Building Science
WETTING:
• Keeping homes safe and sound means protecting the structure (durability) and occupants (IAQ) while you improve energy efficiency • To do that, you need to manage energy and moisture with equal intensity—it’s the Law • You achieve this with continuous control layers for water, air, and heat flows • And your backup plan is to design in drying potential “just in case” stuff gets wet
DRYING:
- Bulk water - Capillary water - Air-transported - Diffusion
- Free drainage - Cap break - Convection - Diffusion
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Hygrothermal Balancing: 2015 Model Energy Code
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N1102.1.1 (R402.1.1) Vapor Retarder. Wall assemblies in the building thermal envelope shall comply with the vapor retarder requirements of Section R702.7.
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Hygrothermal Balancing: 2015 Model Energy Code
Hygrothermal Balancing: 2015 Model Energy Code TABLE R702.7.1 CLASS III VAPOR RETARDERS
R702.7 Vapor Retarders. Base-case for Prescriptive code: Class I or II
Class II: Kraft-faced fiberglass batts.
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Class I: Sheet polyethylene, unperforated aluminum foil.
Class III: Latex paint.
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Thermal management (conductive heat flow)
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• Classes of vapor retarder try to balance wintertime wetting with drying potential to the interior (the rest of the year…). • Vented claddings (or ventilated?) increase drying potential to the exterior (not to mention free drainage of bulk water). • Warming building assemblies reduces the potential for wintertime interstitial condensation. • The code is including more and more building science-based elements over time, recognizing that both heat and moisture flows must be managed.
Summary
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Thank you to our Sponsors
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Some personal thoughts ● “Mother Nature ALWAYS Wins!!!!!”
WELCOME
● “Don’t Do STUPID Things!!!!!”
HOMEBUILDING CROSSRADS
● “Work Slower to BE Faster”
My FAB 4 Integrated // Continuous // Proportionate // Opportunity
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FALL 2017 High Performance in PRACTICE CASE STUDIES
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I know you live here, BUT do YOU UNDERSTAND what HERE IS???
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DURABILITY FIRST!!!
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“If it doesn’t last, IT DON”T MATTER!!!!” I can achieve Performance, Health, and Comfort, Energy Efficiency, and Environmental Responsibility, once I have established DURABILITY.
8 YEARS OLD HomeBuilding Crossroads FALL 2017
Thermal Regions and Rain Exposure HomeBuilding Crossroads FALL 2017
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VAPOR
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I am often asked, “What Material works best?”
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MECHANICAL VENTILATION - CONTROL
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Temperature, Thermal Bridging and Condensing Surfaces??
Exhaust
Supply
Point Source
Distributed HomeBuilding Crossroads FALL 2017
28,000 SqFt Private Residence // Wall Section Detail HomeBuilding Crossroads FALL 2017
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WATER MANAGEMENT
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Below Grade Perimeter Drain
Whole House Renovation / Zero Tolerance Water HomeBuilding Crossroads FALL 2017
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Plastic Drainable Slab Dam Installed at Perimeter
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Perimeter Drain With Filter Sock Set In Stone Bed
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DOWN
OUT
Ensure the rule Is applied to All Details
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WM Rule #1 â&#x20AC;&#x201C; Down and OUT
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DisCONTINUITY = FAILURE
Exterior Sheathing as PRIMARY AIR BARRIER HomeBuilding Crossroads FALL 2017
Good Selection Of Material BUT POOR EXECUTION HomeBuilding Crossroads FALL 2017
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Common Materials Planned Execution
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Continuity Is the KEY
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THERMAL
EXECUTION ??
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SOME CASE STUDIES
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R-48
R-78
U .13 / R-7.6 AIR LEAKAGE .34 ach 50 Pa
R-54 R-25 HomeBuilding Crossroads FALL 2017
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Water Management Air Barrier Thermal Vapor
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Water Management Air Barrier Thermal Vapor
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ROOF / EAVE / HEAD ASSEMBLY HomeBuilding Crossroads FALL 2017
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AIR LEAKAGE .56 ach 50 Pa
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HomeBuilding Crossroads FALL 2017
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HomeBuilding Crossroads FALL 2017
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AIR LEAKAGE .45 ach 50 Pa R-91.7 R-49.2
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R-48.3 HomeBuilding Crossroads FALL 2017
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AIR LEAKAGE 1.25 ach 50 Pa
R-3.3 ANDERSEN
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R-27.5 ABOVE GRADE WALL R-15 R-10 HomeBuilding Crossroads FALL 2017
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R-13 cont insul shtng R-32 Rockwool R-45 total
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R-7.7 /8.3 WINDOWS
AIR LEAKAGE 1.1 ach 50 Pa R-10
BSC RULE 10 / 20 / 40 / 60 / 5 HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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THANK YOU STEVEN BACZEK Architect
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781-354-5839 HomeBuilding Crossroads FALL 2017
HomeBuilding Crossroads FALL 2017
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www.stevenbaczekarchitect.com
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Thank You to Our Sponsors
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HomeBuilding Crossroads FALL 2017
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Homebuilding Crossroads: 2015 Energy Code and High Performance
Building Science Puzzles
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Energy & moisture must be managed with equal intensity. Follow the water.
• Temperature/Food/Water • Molds (spores) are everywhere, all the time… • They like the same temperatures we do… • They like many of the materials out of which we like to build… • Mold generally shows up at 19% MC or higher • Rot requires 25- 28% MC • The easiest/most effective approach to control mold/rot is, almost always, managing moisture.
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Energy efficiency measures reduce heat loss.
Mold/Rot Basics
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Things get wet, heat dries them out.
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Premises
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What about interior sources of moisture?
Sources - Household Moisture
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Source Showering Clothes drying Cooking (dinner) 5 house plants 1 cord “green” wood 4 people Building materials Ground moisture
Quantity (pints) ??? 4 - 6/load 1.2 (+1.5 gas) 1/day 600 - 800/season .5/hour ??? 0 - 100/day
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Source: Minnesota Extension Service (also, see GBA blog…)
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Quantity (pints) .5 (5 - min shower) 4 - 6/load 1.2 (+1.5 gas) 1/day 600 - 800/season .5/hour 6 - 17/day 0 - 100/day
Puzzle 1 (Zone 6) – Mold in kitchen
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Source Showering Clothes drying Cooking (dinner) 5 house plants 1 cord “green” wood 4 people Building materials Ground moisture
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Sources - Household Moisture
• Mold insurance claim • Mold mitigated once • Building scientists called in • Structure at bottom of steep hill with lake on opposite side • Insurance inspector “baffled” by mold returning…
Source: Minnesota Extension Service (also, see GBA blog…)
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Pieces – addition with full basement
View as you drive up…
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Key Takeaways/Lessons Learned
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Crawlspace inspection…
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• Ignore the client; do the “edges” first… • Existing info • “Walk” the exterior (bulk water) • Foundation (bulk & capillary) • Follow the water…
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Puzzle 1 - New Construction Takeaway
Puzzle 2 – mold on painted exterior trim & clapboard
• “Confused” areas of buildings are a REAL problem
• Pre-primed trim & clapboard • Appears to bleed through the latex topcoat
• Make sure that attics & crawlspaces are either completely in or completely outside your control layers: water, air, & thermal
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Puzzle 2 – mold on painted exterior trim & clapboard
Puzzle 2 – mold on painted exterior trim & clapboard
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• South side but not north side • Clapboard with rainscreen • Same acrylic latex topcoat • Different source of clapboard
• Species of wood does not seem to matter • Moisture content of wood is not above 15% and often quite a bit drier
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Forest Products Lab Experts:
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• If you cover an oil-based primer with a “modern” latex paint… • The oil in the primer becomes a food source… • The latex paint is vapor permeable and allows moisture to make it through to the oil… • Modern latex topcoats don’t have the chemical content to inhibit mold like they used to… • Solution: Don’t use oil-based pre-primed wood with latex top coats • Solution: Or if you do, look for a latex top coat with mildicide
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• Compatibility of components or adjacent, layered building materials is key.
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Puzzle 2 - New Construction Takeaway
• Go with building product manufacturers that are taking the lead on material compatibility/creating systems rather than lone materials (like ZIP system….)
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Puzzle 3: recurring water leaks
Given these 2 faces, can you guess where the moisture expressed?
• Brick veneer • Indianapolis, IN • Tyvek-OSB-FG-PE-GWB • $200,000 reclad • Moisture problems persist
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Bay bump-out
Fireplace chimney
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Problem? Solutions?
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• Chimney is a “confused” space, not completely in or out of the house • Water getting behind veneer running down to bump-out shed roof and going … where? • Solution(s)? Follow the water • WRB continuous around chimney chase • Thru-flashing to carry moisture load from brick veneer above • What about painting the brick to reduce/eliminate bulk water wetting?
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• Make sure that all 3 of your control layers work; are continuous.
Puzzle 4: mold in closets in “certain” locations
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• The “pen test” would have avoided this construction defect.
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Puzzle 3 - New Construction Takeaway
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Bulk water management
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Interior sources of moisture
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Interior sources of moisture
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One more crucial clue:
• Outdoors: 59F (dry bulb); RH 64%; dewpoint: 46F. • Basement: 56F (dry bulb); RH: 60%; dewpoint: 42F • Kitchen: 65.5 F (dry bulb); RH: 56%; dewpoint: 47F • Upstairs (MBR): 68F (dry bulb); RH: 46%; dewpoint: 47
mold on back walls of closet gypsum board only in closets along central partition…
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Assessment conducted 4-21-15
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Puzzle #4: last clue – proportions? Attic looking down…
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Basement looking up…
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Performance testing (in this case, blower door test) is really key to getting the details right on each home.
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• Air seal marriage wall in basement/attic • Improve bulk water management • Connect downspouts properly to drainage • Waterproof exposed above-grade foundation • Improve interior moisture management • Vent kitchen range hood to outdoors • Replace existing bath exhausts with Energy Star h-controlled or timer units • Store less cordwood in basement
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Solutions?
A high performance homeowner’s manual can help with occupant management of moisture loads they create and can be a great marketing tool distinguishing your company’s attention to detail.
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Puzzle 5: “Fanciful Fuel”
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Fireplace/woodstove insert above…
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CMU fireplace base below…
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CMU fireplace base supporting…
Basement slab has moisture barrier
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Problem? Solution?
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• CMU chimney base put in before basement slab so likely no moisture barrier under fireplace CMU column • Staining pre-dates insert wood stove • But what about the blue-green efflorescence?
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Puzzle 5 - New Construction Takeaway • Working out job site sequencing is key to successful continuity of control layers • Maybe the pen test is not just footing to ridge but goes across the basement slab as well!
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Puzzle fatigue…
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