NZCB InHouse Magazine August/September 2022

Page 66

TECH TIPS —

Air seals around windows – getting it right matters! Soudal Technical Manager, Steve Loveridge discusses the importance of making sure this is done to spec – without question! Air sealing around windows is such a fundamental task in the building and construction industry, you could imagine there was little left to be said on the topic. Unfortunately, that is not the case, as the multiple calls I receive from both contractors and architects confirms. Done correctly, air seals will work incredibly well. Done poorly they can be a curse to the homeowner, the installer, and, in the longer term, the architect. The purpose of air seals is to provide for the equalization of air-pressure between the external and internal environments without the passage of water-loaded air. In short, the air passes, but without the water. An air seal done correctly will only extend approximately 20-25mm deep between the reveal and the framing sill and will start by having a PEF Backing Rod applied to guarantee a constancy of depth. The brilliance of expanding foam is where the real magic comes into play. The foam is applied once the PEF Backing Rod is in place, and the unbroken nature of its outer skin will allow the passage of air but importantly not moisture. It is worth noting at this point that the expanding foam should never be installed to cross the sill tape to the outside of the structure as damage may occur to this “outer skin” which then gives rise to further potential for moisture uptake into the building. The best air-seals will be capable of moving with the building structure and this is what a correctly applied system of PEF Backing Rod and Expanding Foam will guarantee. In this regard Soudal Gorilla are proud to be the New Zealand market leader in bespoke foam products for these purposes with Gorilla Pro Expanding Foam and Gorilla Flexi Expanding Foam at the top of the specification list. For more information on air seals or technical advice on sealants, foams and adhesives, please contact our technical team on 0800 70 10 80 or visit our website to see our comprehensive product range and technical data www.soudal.co.nz/products/

This Tech Tip was supplied by NZCB National Partner Soudal. Soudal are a key supplier of sealants, foams and adhesives to tradies under our iconic Gorilla brand. For over 30 years Gorilla Grip, Foam, Glues and Silicones have proven their quality, reliability and technical performance in kiwi conditions. www.soudal.co.nz

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IN THE MEDIA

29min
pages 70-73

NZCB Strategic Partners and Affinity Partners

1min
page 74

NEWS BITES

11min
pages 62-65

Air seals around windows – getting it right matters

2min
pages 66-67

Introducing the new GIB® System Selector

1min
pages 68-69

RoVE update #3

3min
page 60

NZCB and Industry Events Calendar

3min
pages 58-59

Apprentice Challenge bench seat finds special home

2min
page 57

A close finish in the Waikato/Coromandel

2min
page 56

Meet our 2022 NZCB Presidents

2min
pages 54-55

Keeping your worksite safe this flu season

3min
pages 52-53

Your business’ health starts with its people

6min
pages 50-51

The Tortoise beats the Hare

4min
pages 48-49

Impressive effort leads to awesome achievement

2min
page 46

Managing finances through tough times

6min
pages 44-45

Gemma the scooter raises a record $9,300 for Cancer Society

7min
pages 38-41

Immigration NZ’s employer accreditation

3min
pages 42-43

Leadership and management

3min
pages 36-37

Can councils transfer some or all of their liability to the builder?

7min
pages 28-29

Busy? Now’s the time to market your business

4min
pages 26-27

NZCB and Noel Leeming Commercial

4min
pages 22-23

A real look into the 2022 employment market

3min
pages 24-25

Understanding provisional tax

4min
pages 34-35

You must pass the ball to win the game

2min
pages 30-31

Make tech a powerful, everyday tool in your business

6min
pages 32-33

Walking the talk at Auckland’s Asian Construction Expo

1min
pages 20-21

NZCB Building Contracts

3min
pages 12-13

Want to improve your business performance?

2min
page 11

Don’t get caught short with your insurance cover

3min
pages 16-17

Message from our Chief Executive

3min
page 8

Message from the NZCB Board

4min
pages 4-5

South Island gets a new office

1min
page 18

Message from our Education and Technical Manager

3min
page 10

Putting our partners in the spotlight

2min
page 19
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