Existing roof layers
Provide information on membranes, coatings and previous insulation. A concealed or poorly understood roof build-up may need further investigation before an underside treatment.
Commercial spray foam experts · Duratite Group
Commercial Pitched Roof Spray Foam Insulation
Spray foam options for suitable commercial pitched roofs, selected around roof covering, deck, ventilation and the complete moisture design.
Discuss your project →A specification built around your application
A commercial pitched roof may be metal-clad, fibre-cement, boarded or another assembly. These are not interchangeable substrates. The survey or drawings need to establish the covering, deck, insulation, membranes and ventilation before a product is selected.
The intended use of the space matters as well. A heated workshop, storage roof and occupied conversion can have different requirements. Identify the thermal target and internal finish, then assess how the proposed insulation will affect the whole construction.
What shapes the insulation specification
Ridges, eaves and openings
Specify interfaces at eaves, ridges, rooflights and penetrations. Required ventilation paths and inspection access should not be covered indiscriminately.
Internal or external route
An underside application is different from external roofing foam with weatherproofing. Where the covering also needs refurbishment, compare the complete alternatives.
Relevant project experience
Duratite project library
TJW warehouse, Bournemouth
See the preparation, roof-underside application and completed insulation on a commercial warehouse project. The case describes the actual roof and system rather than a universal roof specification.
Read the project case study →From project brief to installation
Share the brief
Send photographs, dimensions, site location and the intended use. Include known defects and the outcome you need, such as reducing heat loss or addressing cold-surface condensation.
Assess the construction
The survey establishes the accessible substrate, preparation, moisture conditions and practical installation scope. Drawings and existing records help resolve interfaces with other parts of the building or vessel.
Agree the scope and price
Compare the complete work package: preparation, insulation, protective finish, access and reinstatement. Agree responsibilities and the programme before the work begins.
Record the completed work
Arrange inspection before the insulation is concealed. Keep the agreed specification, product details and installation records with the asset’s maintenance information.
Understand commercial spray foam costs · Compare insulation approaches
Pitched Roof Insulation questions
Can spray foam go directly beneath any roof covering?
No. Suitability depends on the complete roof construction and selected system. Coverings, membranes, ventilation and substrate condition must be assessed.
Will insulation resolve a leaking pitched roof?
Leaks and roof defects need separate assessment and repairs. An internal insulation application is not an external waterproof covering.
What affects the cost of pitched roof insulation?
The treated area, substrate condition, specified thickness, preparation, access equipment and finish all influence the price. Include the work programme and any removal or reinstatement in the enquiry so quotations cover the same scope.
What should be agreed before installation?
Confirm the product and application, prepared substrate, intended thickness, junction details, protective finish and access arrangements. Ask for the relevant product information, installation records and the specific terms of any proposed warranty.
Free survey
Get a quote for your project
Send us your building details and our technical team will specify the right system and a clear budget. No obligation.
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