Vapour control and airtightness membrane – Ampatex DB 90 

Product overview

Where is it used?

• On the inside of timber/metal frames/dry lining, on the inside of roof structures or on the top side of floors.
• Can be installed from the outside of roof structures during refurbishment.

How is it used?

• Ampatex DB 90 vapour control membrane can be bonded, using Ampacoll DT double sided tape, to the underside of rafters or the inside of timber studs prior to being boarded over or counter battened.
• If using on the inside surface of wood fibre insulation boards, apply Ampacoll Primax primer and Ampacoll DT double sided tape to the surface at regular intervals to allow the membrane to be bonded to the surface.
• Once each row of membrane is in place simply tape the joints with Ampacoll XT airtightness tape.
• All joints should overlap by at least 100mm and the perimeter should be sealed prior to counter battening or being over boarded with plaster board.
• Once the joints are taped it forms an air tight, moisture regulating layer.
• Any penetrations, such as joists, pipes, cables or ducts should be sealed with Ampacoll BK 535 penetration sealing tape.

How much will you need?

Each roll of Ampatex DB 90 vapour control membrane is 100m long and 1.5m wide. It covers an area of 140m2 accounting for overlaps.