External soffit insulation

Bright Home Renewables Insulation (BHRI) in-situ applied PUR insulation foam can be applied directly to the underside of either concrete or steel hollow rib design, ground floor structures.

This rigid insulation system does not suffer from air erosion problems and remains permanently adhered even in exposed situations.

Its low thermal conductivity maximises head room.

Ribbed or waffle shaped soffits can be rapidly, economically and seamlessly insulated with BHRI.

Any penetrations into the soffit such as ceiling or pipe hangers and cable trays can easily be sealed by a BHRI application, preventing heat loss and cold spots.


BBA Certificate No. 11/4816.

Bright Home Renewables Insulation has undergone various performance tests. Certificates are available on request.

Bright Home Renewables Insulation used in conjunction with a fire retardant coating will achieve a Class 0 rating.

BBA CertificationLABC RegisteredNBS Plus

Typical detail

External soffit insulation

External soffit insulation

  1. WALLTITE® CL100 insulation to achieve target U-value
  2. Suspended ceiling

Technical data

NBS clauseP10 185
Adhesion to concrete260kPa
Lambda 90/900.025 to 0.028W/mK
Fire ratingClass 1 to BS 476 Part 7


Thickness of WALLTITE (mm)U-value (W/m2k)

Additional resources

Case studies

Other downloads

Contact the experts at Bright Home Renewables to find out how you can benefit from our spray insulation services.

We frequently serve customers nationwide - Call Us On 0800 690 6338