Pitched roof insulation

Bright Home Renewables Insulation (BHRI) is applied directly to the breathable roofing membrane between timber rafters in tiled or slated pitched roofs.

BHRI has a measured water vapour permeability, therefore it does not compromise the performance of any breathable membrane, or the timbers to dry out when subjected to periods of solar radiation.

The system minimises unwanted air leakage and air infiltration.

Features and benefits

Energy efficiency – the continuous spray leaves a minimal amount of surface area without insulation resulting in some cases in a 30% decrease in thermal transmission and an airtight building envelope of low permeability without the need for supplementary material.

Sustainability – sustainable over the life span of the building, BHRI can even prolong the buildings life as it protects against premature deterioration of building materials.

Design freedom – BHRI also provides the specifier with complete design freedom as the spray foam adapts to the shape of the substrate providing an ideal solution for insulating difficult areas such as profiled and curved roofs. The product is self-adhesive and stays fully bonded to the substrate, preventing any possible detachment, common with other types of insulation.

Occupier comfort – for building occupiers, BHRI makes a significant contribution to a comfortable indoor climate by creating a draft free environment that prevents the infiltration of pollutants, toxins and allergens.

Reliability – BHRI is only installed by trained professionals approved by BASF in the UK.

Certification

BBA Certificate No. 11/4816.

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

BBA CertificationLABC RegisteredNBS Plus

Typical detail

New roof with breathable underlay

New roof with breathable underlay

  1. WALLTITE® CL100 insulation to achieve target U-value
  2. Vapour control layer
  3. Plasterboard and skim
  4. Unventilated air space
  5. WALLTITE® returned to insulated cavity stop at head of wall
  6. Breathable roof tile underlay

Habitable space: plasterboard and skim/VCL with taped joints VCL to be carefully cut and sealed around struts, ceiling joists and penetrations); batten/counter batten rafters as necessary to achieve insulation depth, confirm rafter strength sufficient to receive counter battening and boarding if required.

Loft space only, non-habitable: insulated between and over rafters to achieve target U-value. Bright Home Renewables Insulation may remain exposed.

Technical data

SpecificationSpray applied polyurethane foam between rafters, directly onto breather membrane
NBS clauseP10 15A
Air leakage (50mm)0.0033m3hrm2
Conforms toPart L1A 2010, Appendix A
Lambda 90/900.025W/mK
Fire ratingClass 1 to BS 476: Part 7
Water vapour diffusion resistance factor61.12
Adhesion to roof tile underlay232kPa

U-values

Thickness of WALLTITE (mm)U-value (W/m2k)
2000.13
1750.16
1500.18

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