Commercial Spray Foam Insulation in St Austell

What a St Austell spray foam installation involves

Across Cornwall we are usually called about wind-driven damp and condensation. The building tells us what it needs — the survey establishes whether insulation is the right answer, and if so, which system and what thickness.

What we check before quoting

The substrate comes first. Corrugated fibre-cement, profiled steel, concrete soffit and timber all behave differently and each needs different preparation. We check for water ingress before anything else, because underside insulation is not a waterproofing system — a roof that leaks in the rain needs the leak dealt with first. We also record how the building is used and how much moisture is generated inside it, because condensation is driven as much by what happens under the roof as by the roof itself. Where the sheeting is asbestos-cement, encapsulation may be suitable: the material stays in place and remains subject to management.

The system we specify

Most commercial work in Cornwall is closed-cell Nexseal LE, sprayed in situ so it bonds to the deck and holds the surface above dew point — which is what stops the drip. It is rigid, adds stiffness to thin sheeting and carries a 25-year manufacturer-backed product warranty. Open-cell Sucraseal is specified where vapour needs to move more freely and the building can accommodate it. Thickness follows the outcome you need, not a standard figure, and it is written into the specification at survey rather than decided on the day. If you want the trade-offs in full, the comparison with traditional insulation sets them out.

How the installation runs

Installations are programmed around how the building is used, so trading or production continues wherever it can. Protection goes up first, rooflights and services are masked, then the foam is applied in passes and checked against the specified thickness before anything is taken down. A typical St Austell building is a matter of days on site. Specification, product data and warranty documentation are handed over at completion.

What a job costs turns on area, specified thickness and access, which is why a figure before a survey is guesswork; the cost guide sets out the variables honestly. Send us the postcode, the roof type and rough dimensions to arrange a free survey in St Austell.