Weatherboards, timber and sheet claddings benefit from regular maintenance. How much maintenance they need depends on the material, the age, and the design of the cladding.
Join more than 100,000 members today and you’ll get:
Weatherboards can be made from timber, fibre cement, aluminium or PVC. The boards can be horizontal, vertical or diagonal. There are also different profiles available.
Maintenance of weatherboard will depend upon the material it is made out of. All claddings require some maintenance. You should follow manufacturer’s instructions which vary depending on the material the cladding is made from. Regardless of maintenance requirements, the cladding should be washed with a soft broom and clean water every 6 months.
This can happen on new timber. It can exude through paint.
Allow the resin to bleed out naturally. This will take up to 2 years. Scrape the resin off regularly as it comes to the surface.
Once it has stopped bleeding, sand back the affected areas to bare timber, prime with an alkyd-aluminium primer, undercoat, then paint. Using lighter-coloured paint will reduce the risk of further bleed.
This is due to continuous dampness or incorrect timber treatment level.
Address the cause of the dampness.
Remove and replace the rotten timbers, checking that the building paper and framing are sound. Make sure you use a minimum H3.1 treated but painted timber (H3.2 unpainted) for areas that are continuously damp (H4 for contact with the ground and H5 for piles). For more information on the treatment of timber see the NZ Timber Preservation Council website.
If the timber is untreated, seek professional advice on the extent of the replacement needed. The current recommendation is to replace timber to 600mm beyond the last point of damage.
This is due to timber movement (shrinkage or expansion) or moisture absorption in the timber from the joints not being primed when first painted.
Remove the existing paint, re-prime, then cover corners and joints with metal soakers (the type of metal soaker is dependent on the corrosion zone (K8) in which the property is located) or timber cover boards to form a boxed corner.
This could be due to coating failure, poor initial preparation, or using dark colours.
Identify the cause of the failure. Remove areas of failed paint, prime and re-paint. Speak to your paint retailer to get the most suitable product.
This is caused by timber movement, double nailing, or the back of the board being unprimed.
Replace badly damaged timber, nailing with a single line of nails – generally weatherboard and battens should only have one nail per stud or dwang. Ensure all surfaces are primed before painting.
This is due to double nailing, nailing horizontal weatherboards together or timber movement.
Replace badly damaged boards using one nail per board.
Whether you're planning to build your own home or renovate an existing one, we've got you covered with a wide range of articles covering the whole process.
Renovating and altering houses is a favourite pastime for many New Zealanders. Our articles take a look at what's involved when you undertake a renovation project.
Regular maintenance is needed to ensure your house holds its value and remains safe and comfortable to live in.
Thanks for requesting to reset your password. We've sent you an email with instructions on what you need to do. If you haven't received the email within the next five minutes please call us on 0800 266 786.
Sorry, the information you are trying to access is available to paying members only. Your membership helps us deliver our services and advocate for a fair deal for all New Zealand consumers.
Not a member yet? Avoid expensive mistakes and join more than 80,000 other savvy consumers making smart decisions.