Spray Foam Insulation

External soffit insulation

WALLTITE® 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 WALLTITE®.

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


WALLTITE® has undergone various performance tests. Certificates are available on request.

WALLTITE® used in conjunction with a fire retardant coating will achieve a Class 0 rating.

LABC 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 clause P10 185
Adhesion to concrete 260kPa
Lambda 90/90 0.025 to 0.028W/mK
Fire rating Class 1 to BS 476 Part 7


Thickness of WALLTITE (mm) U-value (W/m2k)
120 0.20
100 0.25
80 0.30

Additional resources

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