Thermofloc VSD Membrane roll Thermofloc VSD Membrane

Thermofloc VSD Membrane

Airtight barrier and vapour control layer for use on walls and roof linings.

Suitable for installation on the warm side of the insulation in wall and roof lining applications.

Intelligent high performance airtight membrane with a variable surface diffusion that allows the membrane to act as an effective vapour control layer whilst enabling two way movement of vapour for effective moisture management.

Reinforced for increased tear resitance.

Easy to handle and install without gloves or protective clothing.

Installed with the printed side facing into the building or the fibrous side facing the inuslation/out of the building.


Available for delivery direct from the manufacturer with an approx. lead time of 3-5 days.

Product Information

General information about Thermofloc VSD Membrane

Product Application

Airtight vapour control layer for walls and roof linings

Thermofloc VSD membrane is suitable for use in walls and roof linings as an intelligent vapour control layer.

Product Make-up


Thermofloc VSD Membrane is a non-woven polypropylene membrane that adapts its vapour resistance with changes to heat and moisture levels (winter/cold = high vapour resitance, summer/heat = low vapour resistance).

Product Properties

Colour Light Grey
Weight 100 g/m²
Roll Length 16.7m and 50m
Roll Width 1.5m

Product Prices

Buy Thermofloc VSD Membrane

These items are shipped direct to site from the manufacturer. Additional delivery charges will apply and will depend on the total number of rolls ordered. Please allow £20.00 + VAT per roll up to a maximum of £80.00 + charges will be added manually after the order is placed. Please Click Here for further details, or better yet, contact me to discuss your requirements so that I can provide you with an accurate cost.

Product ex-VAT inc-VAT
Thermafleece Tfloc VSD Membrane, 1.5x16.7m = 25.05m² £108.38 £130.05
Thermafleece Tfloc VSD Membrane, 1.5x50m = 75m² £282.66 £339.19
Thermafleece Tfloc Tape 50mm x 25m = 25lm £27.69 £33.22
Thermafleece Tfloc Tape 60mm x 25m = 25lm £30.23 £36.27
Thermafleece Tfloc Tape 140mm x 25m = 25lm £62.15 £74.58

Reasonable stock levels are held with delivery lead times being around 4-5 working days. Larger orders may take a little longer.

Thermafleece reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Tensile strength MD 350 / CD 315 EN 12311-1
Tear resistance MD 350 / CD 375 EN12310-1
Resistance to water penetration Class W1 EN 1928