Spray Foam Insulation

New timber frame wall insulation

WALLTITE® is applied directly between the studs onto the OSB. The stud depth should be sufficient to meet the recommended elemental U-value.

Unwanted air leakage and air infiltration is minimised and sound attenuation improved.

Polyurethane foams are hypo allergenic and so contain no fibres or dust and no noxious vapours. Mechanical and electrical services can be fixed between the foam and the plasterboard. WALLTITE® is very quick to install minimising on overhead costs, site storage and waste.


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

LABC RegisteredNBS Plus

Typical detail

New timber frame wall

New timber frame wall

  1. Plasterboard and skim
  2. Vapour control layer to be lapped over DPC at floor level and returned to window reveal and jambs
  3. Unventilated air space
  4. Sheathing ply
  5. Breather membrane
  6. WALLTITE® CL100 insulation to achieve target U-value
  7. 50mm air gap
  8. Noggin to support plasterboard
  9. Sill plate
  10. DPC
  11. Treated timber cill support fixed to timber frame, clad and protected in DPC with insulation set above

Allow for differential movement at ALL openings, i.e. at window cill and window heads, as recommended by the timber frame manufacturer/UKTFA/TRADA: to accommodate differential movement and provide weather resistant and durable joint.

Technical data

Specification Insulation sprayed between studwork
NBS clause P10 205A
Lambda 90/90 0.025 to 0.028W/mK
Fire rating Class 1 to BS 476 Part 7
Adhesion to timber 136kPa


Thickness of WALLTITE (mm) U-value (W/m2k)
135 0.20
100 0.25
90 0.27

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