Spray Foam Insulation Cost
It is highly unlikely for you to be able to get spray foam treatment through a regular energy efficient scheme. It is considered an advanced home improvement and is not covered by most incentives. As far as spray foam insulation cost, there is no clear-cut answer as the final cost will depend on many factors. A thin layer of open-cell foam applied in a straightforward loft space will cost around between £20 and £50 per square metre, while a thicker layer of closed-cell foam may cost more.
Other factors adding to the spray foam insulation cost is the configuration of the roof, ease of access and any other structural obstacles that the installer would have to consider in order to deliver a quality job. On comparison, a regular rock wool insulation will cost you just £10 per square metre, however, the impact won’t be anywhere near as effective as with spray foam.
Rock wool is an outdated insulation material and it has its drawbacks, especially the minimum thickness. As we mentioned before, you would be required to install at least 270mm thickness of wool. Roof joists are rarely this deep, so you would have to account for additional structural challenges and after all this trouble you’d have insulation that barely meets the standards, but of course, doesn’t provide as much savings off your fuel bills in the long run.
As a ballpark figure, you’re looking at between £2,000 and £3,500 to get your loft insulated with this new advanced method, and it may seem like the pay-back time is going to be longer. However, with an unsurpassed level of heat transmittance, you will find that you will make tangible savings quicker. Some homeowners have shed a considerable amount of money off their fuel bills. We appreciate that not everyone will achieve this figure, especially in older properties, however, the savings will still be proportionally higher than those achieved with rock wool and other types of loft insulation.