iTP FlameOut Block FR



Flame Retardant Vapour Control Layer

Flame Retardant Vapour Control Layer (VCL) for all roof and wall applications.

Reinforced polyethylene-based membrane using flame retardant materials.

Flame retardant materials are self-extinguishing, resistant to catching fire, reduce flammability, and inhibit, suppress or delay the production of flames.

Impermeable air barrier to increase air-tightness and increases energy efficiency within the building envelope.

FlameOut Block FR and FR Plus are Class B fire rated.

FlameOut Class A is Class A fire rated.


Available for delivery direct from the manufacturer with an approx. lead time of 2-3 days.

Product options

Quantity Product ex-VAT inc-VAT  
£95.98 £115.18
£137.79 £165.35
£303.24 £363.89
£10.45 £12.54

Availability Indicators

iTP FlameOut Block FR is sent direct to site from the manufacturer and is subject to the iTP Membranes shipping charge.

Reasonable stock levels are held with delivery lead times being around 2-3 working days.

iTP 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 to 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

Delivery charges will be calculated at check-out. Please visit our Ordering From Us page for further details on minimum order levels and delivery charges. If you have any queries, please do not hesitate to contact me via our Contact Form or on 01903 899 898.

Product Application

Fire Retardant vapour control layer for roof and wall applications

iTP flame retardant vapour control membrane, FlameOut Block FR, is suitable for use in all roof and wall applications.

Product Make-up

Core: FlameOut Block FR is a reinforced vapour control membrane made from fire retardant materials.

Product Properties

  FlameOut Block FR FlameOut Block FR Plus FlameOut Class A
Colour Milky White Milky White White/Silver
Weight 140 g/m² 210 g/m² 155 g/m²
Roll Length 50m 50m 50m
Roll Width 2m 2m 1.5m

Product Performance

  FlameOut Block FR FlameOut Block FR Plus FlameOut Class A
Flame Retardant Class B-S1,d0 Class B-S1,d0 Class A2-s1,d0
Tensile Strength MD 500 / XD 500 MD 500 / XD 500 MD 1200 / XD 1200
Temperature Range -40 to +70 °C -40 to +70 °C N/A
Water Vapour Resistance > 70 Mns/g > 130 Mns/g > 20000 Mns/g
Water Tightness W1 W1 W1

As per EN 13859-2, Clause 5.2.2, in the case of the breather membrane or VCL being used on a supporting structure, further flame retardant testing of the structure may be needed to determine the flame retardancy of the construction due to a possible different flame retardancy of the supporting construction materials (e.g. wood).

FlameOut Block FR and FlameOut Block FR Plus are Class B-s1,d0 when free hanging or directly installed on a supporting substructure with a flame retardant classification of A1 or A2.