AS3740 FREE DOWNLOAD

One example of a breach of this requirement occurs when laminated wet area lining sheets are fitted over non-compliant, unprotected plasterboard sheeting. The absence of aggressive subterranean termites means that penetration collars, chemical protection or physical barriers are not required. This is compounded by the common practice of installing the shower screen to unprotected wall linings and then tiling up to the screen. Forming a bonded screed removes the need for reinforcement. Only one application layer is required. Apply full coverage to timber floors — full coatings of membranes should be applied to timber floors in wet areas.

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This contravenes ASwhich requires baths, spas and shower trays to be fully supported.

Some regional trade practices are borne of previous technologies. Two important things As I mentioned in a previous Building Connection article, following two key principles will help building practitioners and designers to avoid waterproofing failures, and provide serviceable and usable wet area facilities.

The better quality building practitioners will then oversheet with 6mm wet area cement sheeting, prior to full coverage waterproofing. No timber skirtings either.

as3740

Photos 2 and 3 illustrate where Lamipanel has been installed over unprotected Aquacheck water-resistant plasterboard sheeting. Dress membranes directly into waste pipes — AS requires that membranes are dressed to an approved drainage flange, or puddle flange, and that the flange is set at the lowest drainage point.

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One example of a breach of this requirement occurs when laminated wet area lining sheets are fitted over non-compliant, unprotected plasterboard sheeting. Forming a bonded screed removes the need for reinforcement. Backing rod as barrier stop beneath spa. Some of you may recognise some of these products but others may look like another language. Only one application layer is required. The resultant leak occurs when trays and baths deflect under live load, separating wall linings at the tray junction.

In most cases, this is the preferred method by membrane manufacturers, as it prevents efflorescence defects and stress on the membrane at junctions where bond breakers require release of the membrane, unrestricted by compacted screed.

Unprotected adjoining plasterboard now water damaged.

as3740

The absence of aggressive subterranean termites means that penetration collars, chemical protection or physical barriers are not required. Compliant tiling to height designated by rose connections. These minimum mandatory requirements apply to building practitioners throughout all of Australia, and should be followed with the addition of state amendments.

Waterproofing to BCA – doesn’t apply to me!

This results in high mould concentrations and poor sub-tile drainage. Water damaged Aquacheck sheeting. Many certifiers and council inspectors in Zs3740 will only approve of top-of-screed membrane application as a secondary membrane, where under-screed membranes are applied as the primary protective impermeable layer. The second thing — Use only compliant waterproof and water resistant materials in wet areas AS — Section 2 lists compliant waterproof and water resistant materials to be used in wet area substrates and linings.

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AS – Standards Australia

Compliant waterproofed, tiled to all areas. A x mm cavity around the shower waste is left as37740, without backfilling with concrete. Next Article Has wood-plastic come of age? Escaping water then contacts and deteriorates adjoining timber skirtings — another no-no! Carpet in a bathroom. Reinforcing wire in the mortar bed has penetrated the membrane.

Australian Standards (AS) Waterproofing of Domestic Wet Areas

New South Wales and Victoria, in particular, struggle with the concept. This is compounded by the common practice of installing the shower screen to unprotected wall linings and then tiling up to the screen. They apply to all building practitioners, as required under your particular state or territory legislation.

as3740

MDF skirting has been removed. Apply full coverage to timber floors — full coatings of membranes should be applied to timber floors in wet as374. No membrane to substrate sheeting. Adversely affect the health and amenity of occupants — below-screed membrane application can saturate and become clogged with organic soap residues, body fats, salts and other nasties promoting bacterial growth.