Envirograf Thermal Cavity Barrier

Availability: In Stock

Envirograf Thermal Cavity Barrier

Thermal cavity barrier ideal for cavities around door and window apertures.

Not available to purchase online, please CONTACT US.

Envirograf Thermal Cavity Barrier

Envirograf’s Thermal Cavity Barrier is designed to withstand fire as well as provide insulation around window and door apertures.

It is ideal for this use, as it is fully waterproof and offers over 1 hour of fire protection.

It is made of fireproof sponge which is fixed to a thin intumescent strip that is faced in foil.

An ideal solution where you require both fire and thermal protection, particularly cavities around window and door apertures. The waterproof barrier is completely water-resistant and offers over 1 hour of fire protection. Additionally, creating an effective thermal barrier between the cavity and window/door frame section. The Cavity Barrier comprises of a fireproof sponge fixed to a thin foil-faced intumescent strip. The system is completely moisture resistant.  Simply cut to the required length, subsequently using clout nails at 3 inches (75mm) centres to fix.

See the order reference tab for a full list of sizes available.


The Envirograf Thermal Cavity Barrier is very versatile; it can be used in any cavity that requires fire protection and insulation.

It is especially designed for using around doors and windows.

Fitting is easy. Simply cut to size and fit with standard clout nails

This fit makes it very economical.


A foil-clad fireproof sponge cavity barrier which provides both fire resistance and thermal protection. Its foiled edges provide a moisture barrier and it can be easily affixed to a wide variety of substrates.

ORDER REF                  Cavity Width                Foiled fixing               Sponge thickness

TCB/A                            50mm                          120mm                        30mm

TCB/B                            50mm                          150mm                        30mm

TCB/C                            80mm                          120mm                        30mm

TCB/D                            80mm                          150mm                        30mm

TCB/E                            100mm                        120mm                        30mm

TCB/F                            100mm                        150mm                        30mm


To order this barrier or for a technical specification, please contact us on 01752 690997.

You can also view our other cavity barriers here.


The information displayed about the products on this website is to be used for guidance ONLY. We advise that all customers contact our technical department to obtain a free no obligation specification and quotation before purchasing goods directly from the website.

Please be aware that any negligence caused by failure to obtain the relevant advice, or availment of our specification and estimation service, will absolve International Passive Fire Ltd from any liability should Passive Fire Protection Products prepared, or used, by the purchaser, or any other parties, result in damage to property or human life, or for any monetary costs incurred due to incorrect usage.


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