Loft insulation top-up in Horsham
Looking for a loft insulation top-up in Horsham? We cover Horsham and the rest of West Sussex, with a free survey and a fixed written quote.
Postcode districts we cover here include RH12 and RH13. The local authority is West Sussex.

Where we work around Horsham
Horsham sits about 7 miles from Crawley, measured in a straight line.
We also cover Crawley, Haywards Heath, Burgess Hill and East Grinstead.
| Postcode districts | RH12, RH13 |
|---|---|
| Council area | West Sussex |
| County or area | West Sussex |
What is a loft insulation top-up?
Before we quote we measure the existing layer in several places and check its condition. If it is dry, even and not contaminated, we keep it and lay the top-up across it at right angles. More about a loft insulation top-up.
- Cross layer to a total of 270 to 300 mm
- Tank jacket and pipe lagging in the loft
- Depth check and photos before and after
Why book with us in Horsham
Clear contact details
Your quote says who to call with questions before, during and after the work.
Fixed written price
The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
No pressure selling
You get everything in writing and decide in your own time.
How much does a loft insulation top-up cost in Horsham?
Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6).
Building regulations in England
In England, a loft insulated across more than half its area should reach a U-value of 0.16 W/m²K. Insulation alone is not usually notified to building control. How the rules work across the UK.
Questions about a loft insulation top-up in Horsham
How soon can you visit a home in Horsham?
We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.
Can you visit Horsham outside working hours?
Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.
How do I pay for work in Horsham?
Payment terms are set out on your quote. We never ask for payment on the doorstep or in cash.
Is it worth topping up 100 mm of loft insulation?
Often, if the existing layer is in good condition and you also want a warmer house or a better EPC. On bill savings alone, a top-up from about 100 mm takes decades to pay back, so the case is strongest when it is done alongside other loft work.
Can new insulation go on top of old insulation?
Yes, if the old layer is dry, clean and reasonably even. If it is damp, contaminated or badly compressed we recommend removing it first.
