Skip to main content

Appraisal number: 995 (2018)

Date issued: 26 Jan 2018


bituFLAME DPM Membranes are damp-proof membranes (DPMs) for basement retaining walls and floors. They are applied under floor slabs and foundations and to the exterior face of basement retaining walls to prevent water vapour penetrating to the interior face in spaces where moisture may cause damage.

The products are supplied as torch-on polymer-rubber modified bitumen sheets in roll form and are applied as single or double-layer systems.


bituFLAME DPM Membranes have been appraised as damp-proof membranes for use under floor slabs complying with NZS 3604 and as a damp-proof membrane behind concrete masonry basement walls and under floor slabs complying with NZS 4229.

bituFLAME DPM Membranes have also been appraised for use as a damp-proof membrane on buildings subject to specific design within the following scope:

  • Where the design of the building will be the responsibility of the building designer.
  • With clean, sound, continuous substrates of in situ or precast concrete complying with NZS 3101 and AS/NZS 1170 or concrete masonry complying with NZS 4230 and 4210.
  • Where the membranes are adequately protected against damage during backfilling and in service.
  • Where subsoil drainage and free-draining granular backfill has been placed behind basement walls. 

The products must be installed by trained applicators approved by Waterproofing Systems NZ Ltd.

Technical literature

bituFLAME Tanking Membrane Architectural Product Brochure, September 2016

Consenting instructions

Always refer to the Appraisal in full and the technical literature.

Appraisal holder

Waterproofing Systems NZ Ltd
Phone: 09 579 1460

Marketer details