#Tiled shower ceiling crack#

Compressed sheetĬompressed sheet is commonly used as a substrate for a tiled finish. Some newer products that have been treated to H3.1 are available and are marketed as suitable for wet areas. Traditionally, particleboard and MDF are not recommended for use in wet areas as they are very easily damaged by moisture.

have a minimum of three coats of water- or oil-based, semi-gloss or full-gloss paint (oiled finishes are not recommended in wet areas).

have edges sealed prior to installation.

It is not suitable as an exposed finish in showers.

It has a high resistance to impact, is a suitable substrate for tiling and may be used in water splash areas if it has an appropriate finish. It can be treated, but treatment must be compatible with waterproofing membranes or coatings applied and should be a water-based preservative such as CCA (LOSP is not suitable because of the solvents used). Plywood is not commonly used as a wall lining in wet areas, but it is more stable than timber and wood-based products. If untreated, timber is also more susceptible to borer attack.

#Tiled shower ceiling crack#

Movement of the timber may crack an applied finish, allowing moisture ingress that can lead to swelling, staining and premature coating deterioration. Timber is dimensionally unstable and susceptible to moisture. Timber should also be sealed or primed on the edges and back face before installation Timber is not suitable for shower areas.Īn impervious finish can be a minimum of three coats of semi-gloss or full-gloss paint (oiled finishes are not recommended in wet areas). Timber has been commonly used in wet areas since the opening years of the 20th Century but is not included under E3/AS1 and therefore must be consented as an Alternative Solution. This means that they must be consented as an Alternative Solution. water resistant sheet linings finished with decorative high pressure laminate or factory applied polyurethane or resin, installed with impervious joints.Į3/AS1 makes the comment that other wall linings and finishes finishes may also satisfy performance requirements, but they are outside the scope of the Acceptable Solution.sheet linings finished with a semi-gloss or gloss coating or a hard-wearing low-sheen latex paint containing mould inhibitors.ceramic or stone tiles with 6% maximum water absorption and waterproof grouted joints.

integrally waterproof sheet material (such as PVC) with sealed joints.

In accordance with NZBC clause E3 Internal moisture, wall linings and finishes exposed to water splash must be impervious and easy to clean.Īcceptable Solution E3/AS1 lists suitable linings and finishes for wet areas as: Ceramic-based solid plaster and concrete.Wet area wall and ceiling linings and finishesĪ wide range of wet area wall and ceiling linings and finishes is available, each with pros and cons.