Intrim Product Information & Installation Guide

Intrim Unprimed Mouldings –Treatment Guide

WARNING

ALL FACES OF MOULDINGS MUST BE SEALED OR PRIMED BEFORE INSTALLATION TO ELIMINATE ANY MOVEMENT CAUSED BY MOISTURE CONTENT AFTER INSTALLATION.

*SK800 SHADOWLINE SYSTEM* – MUST NOT SEAL OR PRIME THE TOP RIBBED SECTION WHERE PLASTER JOINT IS FORMED.

OUR PRODUCT WARRANTY IS VOID IF THIS PROCESS IS NOT CARRIED OUT.

THANKS, INTRIM TEAM

Intrim Primed Mouldings – Installation Guide

Cutting

• Cut from the profiled face through to the back to prevent fibre tearout that is inherent with all timber.

• To ensure the best possible finish we recommend that you only use sharp, well maintained tools.

Hand Nailing

• When Hand nailing ,the use of bullet head bright nails is recommended. The hand nailing should be finished with a nail hole punch so the nail sits just below the surface.

Gun Nailing

• Ensure you adjust the gun with each moulding type to prevent the nail from shooting too deep and make sure the nail finishes just below the surface.

• We recommend you use a protective tip on the gun to eliminate any bruising that may occur on the surface.

Gluing

• When gluing backface of moulding to plaster or rendered wall, we recommend you use Intrim Intense Hold Adhesive or a rapid cure polyurethane based construction adhesive.

Sanding & Painting

• After installation, it is strongly recommended to seal any nail holes and exposed sawn surfaces with an appropriate sealer i.e. Zinsser bin, (used in accordance with manufacturers instructions).

• Nail holes and small surface checkouts must be filled with appropriate wood filler, then sanded.

• It is essential to wipe off dust and dirt that may have accumulated on the surface of the moulding.

• A fine sand is recommended prior to applying top coats – (400 grit) should be used to avoid sanding through the sealer on the moulding which can lead to differential grain swell.

• It is recommended to apply further coats by brush.

• If you wish to spray further coats, you must test a small section of moulding, prior to coating all the product.

• It is not recommended that further coats be watered down or thinned out.

• Do not use paints that are designed for absorbent surfaces such as plasterboard sealers.

• Paint coats to be applied in accordance with manufacturers instructions.

• When using Dulux aquanamel with an extra bright base, you must apply a Dulux 1 Step water based primer prior to coating.

• Water based/acrylic top coats may be directly applied and do not require another primer or sealer coat –Dulux precision maximum strength adhesion primer is recommended should you wish to further prime coat.

• Oil based/enamel top coats must have a suitable primer (recommended – Dulux One Step Primer/Undercoat or Zinsser Cover Stain Primer Sealer) applied prior to applying top coats.

Health & Safety

• When working with preprimed mouldings ensure you use all the correct personal protective equipment e.g. mask, gloves, goggles. Machine tools should be fitted with dust extractors and work areas kept clean.

• Storage and work areas should be adequately ventilated.

• Machines should be well maintained and the cutting tools should be sharp.

Maintenance

• Normal care should be taken for timber skirtings, as is the case for any painted timber product for longevity of the product. Timber may need sanding and recoating every 5-10 years depending on volume of usage and traffic.

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Product Information & Installation Guide

Features of FJ-Pine Timber

Using a natural timber provides longevity to your mouldings through its strength and natural makeup, and each piece is as unique as a fingerprint.

Because each piece of pine originated from a growing tree, there are features and differences from piece to piece. Our manufacturing process for these timbers to create a beautiful moulding, meets Australian standards for machined mouldings, but even through careful treatment of the timber, some of those natural features you find in each unique piece of timber is unavoidable in the final product.

You may see some of the following in pine mouldings:

Slight surface chip out

Open grain tear out (raw)

Raised grain causing surface lifting

Open grain tear out (primed)

Open grain slit

Small surface check out Gum vein pocket

Product Information & Installation Guide

Many people celebrate the beauty of their timber and choose to leave small timber features visible, but if you are wanting a flawless finish in your mouldings, you, your painter or builder can EASILY fill and sand over these timber features, at the same time as filling and sanding nail holes and fixing marks during the preparation process on site, prior to painting.

The beauty of using natural timber is that it is:

• Easier material to work with, as for cutting and fixing.

• Not as abrasive on tools, giving less wear and tear.

• Doesn’t split when edge fixing, particularly on architrave mitre joints.

• Doesn’t chip out easily when sawing.

• Moisture resilient– doesn’t swell, absorb moisture or warp like MDF can.

• Offcuts can be recycled as they are natural.

• Environmentally friendly and FSC Certified, meaning it is sourced through sustainably managed forests.

Features of MDF

MDF is a man-made product, and while a big benefit is in the perfectly smooth finish of each face, there are other features of MDF which need to be taken into account when choosing mouldings in your home.

• Man-made material therefore consistency throughout the lengths (No grain).

• Good for high gloss paint finish due to no features that come with natural timber.

• Splits on edge fixing, particularly on architrave joints. Will need extra attention (such as putty filler) to give a perfect finish.

• Waste and offcuts must be disposed of and do not break down easily, adding to waste.

• Is not FSC compliant.

• Not recommended in wet areas.

MDF exposed to water will swell and bubble the paint over time.

Product Information & Installation

Solid Timber Moulding Acclimatisation Fact Sheet

Timber is a natural product that expands and contracts with seasonal changes and is affected by the moisture content of the air. The moisture content of timber is the percentage weight of water present in the timber compared to the weight of the timber with all water removed. Moisture content varies with changes in humidity and temperature in the surrounding air.

It is important to remember that small seasonal changes in timber are considered normal and small gaps that open up during dry periods are not considered a defect.

To minimise the movement of a solid timber moulding caused by swelling on moisture uptake and shrinking on moisture loss, it is important to locate timber in an environment in which it is to be finally installed.

This fact sheet outlines the procedures required to assess the site and acclimatise solid timber for the best results.

Site Assessment

Every Site requires climate assessment prior to the installation of solid timber. It is important to know the long term relative humidity for the areas where the timber is to be installed. Relative humidity is the major influence determining whether solid timber will absorb moisture from the air and swell, or whether it will lose moisture and shrink.

If the moisture content of the timber is close to the average long term relative humidity for the area, then subsequent seasonal changes will be minimal. However, if the long term relative humidity for the area is significantly different to that of the timber, seasonal changes in the moisture content of the timber can create problems.

Solid timber is kiln dried to approximately 10-12% moisture content.

To measure onsite relative humidity, you will require a Hygrometer. It is a good idea to record Rh and temperature levels prior and during installation.

The local site climate can be assessed using data from the Australian Bureau of Meteorology website at http://www. bom.gov.au/climate/data/ . Approximate average equilibrium moisture content (EMC) is proved for each climate in Australia, EMC is the moisture content that timber will reach under set conditions of relative humidity and temperature.

Where seasonal variations are greater, seasonal movement (shrinkage and swelling) can be expected to be greater also. Areas that experience high levels of seasonal variation require greater allowance for timber expansion at the time of installation.

Internal Micro Climates

The internal environment should also be assessed before installation. Within a dwelling, a number of climates may develop, causing areas of timber to respond differently within the same dwelling.

These include large expanses of glass, fireplaces, fridges, air conditioners, any appliances that vent warm air, the aspect of the house and two-storey constructions. All of these can have an effect on the dimensional movement of the timber. When mouldings are exposed to direct sun through large glassed areas, protection should be considered before, during and after construction. Evaporative coolers add moisture to the air and raise the relative humidity, resulting in moisture contents in the timber that are higher than under ambient conditions.

The likely movement of the timber after installation should also be a consideration when assessing the site. Small differences in moisture content between mouldings at the time of manufacture (5% is allowed by Australian Standards) together with variable conditions within the house (such as a westerly room compared to a southerly one) will cause further variation in timber width. For this reason, it can be expected that small gaps will occur at the joints/edges of most mouldings, particularly during the drier months. These gap sizes may differ. In cases where shrinkage may occur after installation, wider mouldings such as 130mm will result in larger gaps when compared with narrower moulding widths. Air conditioning installed after a timber moulding has been installed, which does not have a humidity control system may increase the size of shrinkage gaps as it changes the relative humidity in the area.

Some movement occurs in timber mouldings after installation as the timber adjusts to the climate. Although moulding finishes may retard moisture content changes, they will not prevent this kind of movement.

Important Issues about Subfloors

As mentioned, solid timber moulding is kiln dried to approximately 10-12% moisture content.

Where the average supplied moisture content of the moulding is near the expected average in-service moisture content, acclimatisation of the moulding is not necessary.

Where conditions are drier, such as inland areas or airconditioned buildings, or where conditions are humid, such as in coastal areas or elevated regions, mouldings may need to be acclimatised on site.

Product Information & Installation Guide

Acclimatisation is the process of allowing partial equalisation of the moisture content of the timber moulding when supplied, to the moisture content of the surrounding environment in which the timber is to be installed.

Please note that the rate of moisture update varies from species to species.

Acclimatising relies on each individual moulding being exposed to be in-service atmosphere so packs must be opened and restacked in a way that allows air to flow freely between each moulding.

Acclimatisation is only complete when the moisture content of the timber moulding is equal to RH in the environment. This usually takes about fourteen (14) days for 18mm moulding but may take longer or shorter depending on the Species used and weather conditions.

To check that the timber moulding has reached this point, it should be moisture tested with an appropriate timber moisture meter. This reading can then be compared to the Rh using the graph below.

A simple guide to whether you need to acclimatise is provided in the chart below

Reference: Wood Handbook: Wood as an Engineering material (Agriculture Handbook 72). Forest Products Laboratory, US Department of Agriculture.