- Home
- Insulation
Stop the heat leaving first.
Loft, cavity, solid wall and ventilation, designed together and installed by our own people across Chertsey and Surrey.
Where the heat actually goes
Four measures, in the order a surveyor would do them.
- Loft insulationThe cheapest and the first. 270mm between and over the joists.
- Cavity wall insulationThe biggest saving after the roof, where a suitable cavity exists.
- External wall insulationFor solid walls, where the elevation can change.
- Internal wall insulationFor solid walls, where it cannot.
- Ventilation improvementsWhat a tightened house needs so moisture has somewhere to go.
Do it in the wrong order and you pay twice
Insulation is not a shopping list. Each measure changes what the next one needs.
Fabric before plant
A heat pump sized for an uninsulated house is a bigger, more expensive heat pump running harder for the rest of its life.
Walls before windows
Windows are usually the smallest heat loss and the biggest bill. Doing them first feels like progress and moves the least.
Ventilation with, not after
Every measure that tightens the house makes ventilation matter more. Designing it in at the same time costs less than retrofitting it after the mould appears.
Then generate
With demand down, a solar array covers more of what is left and a battery covers more of the evening.
Work we have finished
Lofts, cavities and the tests that follow.
Most of this is zero-rated, and some of it is free.
Insulation carries 0% VAT until 31 March 2027, so the figure on the quotation is the figure you pay. On top of that, insulation is what funded schemes are built around — Warm Homes: Local Grant, and ECO4 until it closes on 31 December 2026.
Eligibility depends on the household and the property rather than on us, and we check it before you commit to anything rather than after.
Scheme rules and closing dates change. We confirm what applies to you at the survey.
How a fabric job runs
One conversation
What the house is, what it costs to heat, and what is already been done to it.
One visit
Loft, walls and ventilation assessed together, because they affect each other.
One proposal
Every measure priced, with the zero VAT rate and any funding already applied.
One contractor
Our own installers. Where measures combine, they are done on the same visit.
One handover
Certificates, guarantees and the paperwork an EPC assessor or a scheme will ask for.
After the work is signed off
Insulation has nothing to service, but it has to be evidenced.
Your paperwork, on the day
Installation certificates, and on a PAS 2035 job the assessment and design records the scheme requires.
A two year guarantee
On every measure, in writing, transferable if you sell, and insurance-backed.
It moves your EPC
Loft depth and wall construction are two of the heaviest weighted things an assessor records.
One number, and the same team
Every measure here was fitted by us, so there is one number for all of it.
Two things people ask about next
Both have a page of their own.
The questions we get asked most
Which should I do first?
The loft, almost always. It is the cheapest, the quickest and it makes every measure after it smaller.
How do I know if I have cavity walls?
Age and brick pattern give you a good idea, and there is a checker on the cavity wall page. A borescope at the survey settles it.
Is insulation really zero-rated?
Yes, until 31 March 2027, on insulation installed in residential property.
Could a scheme pay for insulation?
Insulation is what funded schemes are built around. Eligibility depends on the household and the property, and we check it before you commit.
Will insulating cause damp?
Not when ventilation is designed in at the same time. Damp problems after insulation are almost always a ventilation problem that was not addressed.
Do I need insulation before a heat pump?
Not for the grant. The Boiler Upgrade Scheme dropped its loft and cavity insulation condition in 2024. It still helps: a warmer house needs a smaller unit, which costs less to buy and less to run.
Often worth doing at the same time
Same team, same survey, one visit where it makes sense.
Book a free survey for insulation
Tell us about the property and we will come and look at it. No charge, and the figures come in writing afterwards.
- A proper survey, and the figures in writing
- Any grant you qualify for, applied for by us
- No charge, whether or not you go ahead
- Weekdays 8am to 5pm, on 01932 550828
Start with the loft.
Ten minutes up there tells us what you have, what it needs and whether somebody else will pay for it. The survey is free.