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Timber Finishing and Care

To maintain their appearance and performance, timber windows and doors need to be cared for and maintained on a regular basis. Explore our guide to finishing and maintaining your timber windows and doors below.

Always store windows and doors upright in a dry area that is not exposed to the weather.

Timber windows and doors can be irreparably damaged from being exposed to the weather, defects due to moisture content that falls below 10% or for moisture content that exceeds 15% are not covered by your warranty.

If storage of timber windows and doors is likely to exceed 14 days, it is recommended to seal all surfaces and edges beforehand to protect the product.

Do not store or move frames in a way that alters the square positioning of the frame.

Keep the protective film (if fitted) on your product for as long as possible. However, the adhesive protective film should be removed within 90 days of delivery otherwise it may damage your item.

Protect window and door surfaces from mortar, brick cleaning acid and plaster. Wash away any spillage immediately or permanent damage will result. Failure to protect windows from any mortar, brick cleaning acid or plaster will void the warranty.

 

Ideally timber window and doors should be sealed within two weeks of delivery. Paint, varnish or seal both faces and edges, top and bottom (i.e. hinged doors need to be finished on both faces of the door, the sides and the top and bottom). Defects due to moisture content that falls below 10% or for moisture content that exceeds 15% are not covered by your warranty.

We recommend that timber windows and doors exposed to sunlight be painted or stained with light reflective colours as dark colours absorb light and heat. Using dark colours will cause a drying effect and could cause the product to warp over time.

The use of a light-coloured topcoat is essential. Your paint supplier or paint manufacturer can advise you on the light reflective value (LRV) of the colour you have selected. The higher the LRV, the less heat the material will absorb and the longer the expected life of the paint finish.

Black has an LRV of approximately 5. White has an LRV of approximately 95. Choosing paint colours with an LRV of greater than 50 is a wise choice.

Also, using different colours on either side of the door or window (exterior/interior) will cause uneven heat and moisture absorption, particularly for products in exposed applications, and may cause the door or window to warp. The end grain of timber absorbs the most moisture. Consequently, failure to paint or stain all sides, including top and bottom and edges, will void the warranty.

Extra care must be taken when painting to ensure that hardware and seals are not painted over by the paint finish, as this will impact the products operation.

Generally, paint, sealing, and stain manufacturers will specify that you should give timber a light sand before finishing. Always refer to the paint, sealing and stain manufacturer’s information.

The surface should be prepared with appropriate sandpaper. Do not use steel wool or other metal scourers, as this can result in damage.

Light sanding is recommended for timber doors.

Timber sliding and stacking doors and sliding windows feature veneer wrapped aluminium components. These components should be sanded carefully with P120 sandpaper with no more than 100 strokes on the veneer.

Do not sand veneer doors back more than 0.2mm as the substrate may be exposed.

Do not use sandpaper with a lower grit value of 240.

Always sand in the direction of the grain, sanding cross-grain tears the wood fibres, which results in sanding scratches becoming more apparent, especially under a stain.

Do not leave your timber windows and doors weather prior to the application of a paint system.

Un-primed timber windows and doors must be primed before painting. Follow the paint manufacturer’s instructions for specific instructions.

If painting, the timber can be finished with water-based or oil-based paints. Follow the paint manufacturer’s recommendations on specific paints.

Semi-gloss or satin finishes are recommended on timber products to reduce the effect of timber grain show through.

If staining, the surface of the timber must be scuffed with 120 or 180 grit sandpaper or other non-ferrous scourer pads to ensure good adhesion of the stain.

For ongoing maintenance of timber, wipe down regularly with a damp cloth.

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