Anti-Condensation Spray Foam Insulation

Dripping from a warehouse or farm roof can come from condensation, rainwater ingress or both. We start with the building use, roof condition and moisture sources, then assess whether an insulation upgrade forms part of the answer.

Closed-cell spray foam can follow a suitable prepared roof profile. Its thickness and junction details need to be specified alongside ventilation and moisture control. Read the commercial roof condensation guide for the differences between visible surface moisture and condensation within a roof build-up.

When do the drips appear? Is the space heated? Are wet processes, washdowns, livestock or damp goods present? Include how the building is ventilated and whether its use has recently changed.

A store, heated workshop and livestock shed create different conditions. The survey should account for those differences instead of applying one standard depth or promising the same result everywhere.

The proposed build-up needs a thermal and moisture assessment. Identify treated surfaces, slab or roof junctions, steelwork, rooflights, vents and penetrations. Untreated cold surfaces may remain condensation sites.

Closed-cell foam has resistance to vapour movement, but an additional air or vapour control layer may still be needed. Existing membranes, insulation and coatings must be considered. Any protective finish is selected for the building’s use and supported by the appropriate system evidence.

Unresolved leaks, corrosion or structural defects need assessment before insulation. Where asbestos-cement is present, the material condition and proposed task determine the method and controls. See encapsulation options.

Area, specified thickness, preparation, access height, protection of stock and machinery, work phasing and any required finish affect the scope. Send safe photographs, dimensions, postcode and the problem you are experiencing.

Ask for the product and thickness, coverage and exclusions, preparation, access arrangements and handover records in the written scope. Our quotation comparison guide explains what to check.