Scope of use
Protecto Wrap AFM®-WM Wet Area Membrane has been appraised for use as a waterproofing membrane for internal wet areas of buildings, within the following scope:
- on floor substrates of concrete, flooring grade particle board, plywood, compressed fibre cement sheet and fibre cement sheet tile underlay, and on wall substrates of concrete, concrete masonry,
- wet area fibre cement sheet lining systems and wet area plasterboard lining systems; and,
- when protected from physical damage by ceramic or stone tile finishes; and,
- where floors are designed and constructed such that deflections do not exceed 1/360th of the span.
Conditions and Limitations:
- The membrane must be installed by Certified Installers
- The use of Protecto Wrap AFM®-WM Wet Area Membrane on concrete slabs where hydrostatic or vapour pressure is present is outside the scope of this Appraisal.
- Building structural movement and control joints in the substrate must be carried through to the tile finish.
- The design and construction of the substrate and movement and control joints are specific to each building, therefore the responsibility of the building designer and building contractor and are outside the scope of the Appraisal.
- Ceramic or stone tile finishes are outside the scope of the Appraisal.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B2 Durability: Performance B2.3.1(b)
- Clause E3 Internal moisture: Performance E3.3.6
- Clause F2 Hazardous building materials: Performance F2.3.1
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
Protecto Wrap AFM®-WM Wet Area Membrane has been appraised as an Alternative Solution in terms of New Zealand Building Code compliance.
No maintenance of the membranes will be required provided significant substrate movement does not occur and the tile finish remains intact. Regular checks must be made of the tiled areas to ensure they are sound and will not allow moisture to penetrate. Any cracks or damage must be repaired immediately by repairing the tiles, grouts or sealants.
In the event of damage to the membranes, the tiling must be removed and the membrane repaired by removing the damaged portion and applying a patch as for new work
Drainage outlets must be maintained to operate effectively, and ceramic or stone tile finishes must be kept clean.