The short answer
A spray foam loft survey is priced for the individual house, so the cost is confirmed when you book. For context, MyJobQuote (October 2026) gives a typical UK range of £100 to £350 for a general roof survey. A foam survey looks closely at the insulation and timbers beneath it, so use that range as a guide to the market only.
A general roof survey, for context
The nearest benchmark for a foam survey is the ordinary roof survey. MyJobQuote (12 October 2026) gives around £300 as a roof survey's typical cost, with table rows from £100 to £200 and from £200 to £350. These are typical UK ranges from a third-party guide, not prices for our work.
The range is wide because a survey can mean different things. A quick visual check from the ground is one end of it. A thorough inspection inside and out, with a written report and photographs, is the other. Property size, how the roof is reached and whether a report is wanted all shift where in the range a visit falls. Treat any figure without a stated scope with caution.
For a foamed loft, the useful version is the detailed one. A look from the pavement says nothing about the insulation, and a brief glance in from the hatch cannot see the timbers behind it. When you collect quotes, ask each firm exactly what the visit includes and whether a written record comes with it. Otherwise the lowest figure may simply be the smallest job.
What a foam survey looks at
We start in the loft. We identify the foam as far as we can, noting whether it looks open-cell or closed-cell, how far it extends, its thickness and whether it reaches the slope, the gables and the eaves. We photograph it, and we look for any gaps or edges where the roof timbers show through.
Next comes the outside of the roof. Slipped or missing tiles, cracked slates, blocked valleys and failed flashing all matter, because foam can hide the water that gets in through them. Our answer on spray foam on a leaking roof explains why that combination is worth checking.
The aim is a clear picture. RICS says that where foam covers the roof timbers, they cannot be fully inspected, so we record what can be seen and say what cannot. If the visible evidence points to damp, rot or a failed underlay, we show you. If it looks sound, we say that too, and you hold dated pictures that a buyer's surveyor or lender may want. The page on the spray foam survey covers the visit in more detail.
What you receive afterwards
After the visit you get a plain-English explanation of what we found, with the photographs we took, so you can see each point for yourself. You do not need to take our word for anything: the pictures are of your own loft and your own roof.
We then set out your choices. These may include leaving the foam where it is, removing part of it, removing it all, or repairing something else first, such as the covering or the underlay. We explain what each would involve in practice, what it would deal with and what it would leave, so you can weigh up the options without pressure.
If you decide to go ahead, a written price follows for the work you choose. It is one total, which you can read at your own pace and compare with other firms' quotes if you wish. If you decide not to go ahead, the photographs and notes are still yours, and they are often useful when a house is sold or remortgaged. Please keep them somewhere safe. You may also want to read removing spray foam to get a mortgage before deciding.
Getting the best out of the visit
A few small preparations make the survey quicker and more useful. Clear a path to the loft hatch, and if there is boarding, tell us where the safe walking route runs. Have any paperwork from the original spray job to hand: the installer's name, the date, the product data sheet and any guarantee. That tells us which foam we are dealing with and how long it has been there.
Tell us about any history you know. Leaks, stains on ceilings, condensation on windows, a musty smell or a recent sale survey that mentioned the foam are all worth raising. They point us to the parts of the roof to check first.
It also helps to say what you need the survey for. If a mortgage lender or buyer has asked for evidence, we can focus on what they will want to see. If you are simply worried, we can focus on the roof's condition.
Ask whether the price covers the whole visit including any report, and whether VAT is in the figure. Our spray foam removal page explains what happens next, and the one written total follows only once the loft has been seen.
