Description

Mapelastic and Mapelastic Smart are two-component, liquid-applied waterproofing membranes for external applications on substrates under ceramic or stone tile finishes for decks and balconies.

Scope

1. Mapelastic and Mapelastic Smart External Waterproofing Membranes have been appraised as a waterproofing membrane on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with respect to building height and maximum floor plan areas; and,
• with building structures designed and constructed to meet the requirements of the NZBC; and,
• with deck and balcony supporting structures of timber framing with substrates of fibre cement compressed sheet; and,
• with substrates of suspended concrete slabs.

2. Mapelastic and Mapelastic Smart External Waterproofing Membranes have also been appraised for use as a waterproofing membrane on specifically designed buildings within the following scope:

• with building structures designed and constructed to comply with the NZBC; and,
• with deck and balcony supporting structures of timber framing with substrates of fibre cement compressed sheet; and,
• with substrates of suspended concrete slab; and,
• subjected to maximum wind pressures (refer to Paragraph 7.7); and,
• with the weathertightness design of all junctions being the subject of specific design by the designer.

(Note: The design of these junctions have not been appraised by BRANZ and is outside the scope of this Appraisal).

3. Decks and balconies waterproofed with Mapelastic and Mapelastic Smart External Waterproofing Membranes must be designed and constructed in accordance with the following limitations:

• constructed to suitable falls (refer to Paragraph 12.4); and,
• with the membranes continually protected from exposure to ultraviolet (UV) light and from physical damage by ceramic or stone tile finishes; and,
• with decks and balconies designed and constructed such that deflections do not exceed 1/360th of the span; and,
• with no steps within the deck level, no integral roof gardens and no down pipes discharging directly onto the deck.

4. Movement and control joints in the substrate must be carried through the membrane and tile finish. The design and construction of the substrate and movement and control joints is specific to each building, and is therefore the responsibility of the building designer and building contractor and is outside the scope of this Appraisal.

5. The ceramic or stone tile finishes are outside the scope of this Appraisal.

6. The membrane must be installed by trained applicators, approved by MBP (NZ) Ltd to the conditions of the Technical Data Sheet (TDS) of the products.