5.030 Google reviews10-year guarantee, up to 20 years depending on the job
Roof insulation in Croydon, fitted from the loft or the roof
Want roof insulation in Croydon that keeps the heat in without turning the loft into a damp box? Apex take payment only on completion, when the boards are in and the loft is swept.
Roof insulation quote
Pick the job. It takes about 30 seconds.
Or call free on 0800 404 6688. Pay on completion.
5.0 on Google30 reviews, all 5 stars
Expert Roofer VerifiedEvery check passed, see our profileSigns your roof needs better insulation
A cold, damp top floor is often a roof problem, not a heating one.
Cold rooms in the roof
Loft rooms with thin or no insulation in the slopes lose heat straight through the tiles. They are cold in winter and stuffy in summer.
Frost melting first on your roof
On a frosty morning, a roof that clears before the neighbours' is losing heat through the covering. It is an easy check from the street.
Condensation and mould in the loft
Black spots on the rafters or damp timber in winter point to warm, moist air meeting a cold roof with nowhere to go.
Bare slates seen from the loft
Shine a torch up from the loft hatch. If you can see the underside of the slates or torn old felt with nothing between the rafters, the heat walks straight out.
A re-roof on the way
If the tiles are coming off anyway, it is the best moment to insulate between the rafters, with the scaffold up and the roof already open.
How Apex insulate a roof
Patrick checks the loft, the rafters and the roof covering first, and photographs what is there now: loose mineral wool, old felt, bare slates or nothing at all. He explains where the heat is going and how the new insulation fits, and you agree the price up front. If the roof itself needs work, you see that too, so the insulation goes in once and is not disturbed later.
PIR boards are rigid foam panels with foil faces. The team cuts them to fit tightly between the rafters and seals the joints with foil tape, keeping a ventilation gap above so the roof can breathe. The boards can go in from the loft side in a lived-in house, or from above during a re-roof with the tiles off. Offcuts and old wool are bagged up and taken away, and the loft is swept before the team leaves.
- PIR boards between the rafters
- Fitted from the loft or during a re-roof
- Ventilation gap kept above the boards
- Joints sealed with foil tape
- Loft left clean
Insulating Croydon's older roofs
Most of Croydon's houses were built long before anyone insulated a roof. Victorian terraces in Thornton Heath and South Norwood often have bare slates with nothing under them, and 1930s semis in Shirley and Selsdon have old felt and a thin layer of loft wool. Rooms in the roof on Addiscombe's Edwardian villas get bitterly cold. With damp south London winters and wind coming off the Downs, a properly insulated roof makes a real difference to how a house feels.
From the loft side or during roof work
The right method depends on the roof and on what else is being done to it.
PIR from the loft side
Boards fitted between the rafters from inside, without touching the tiles or disturbing the outside of the house. A good fit for rooms in the roof and lofts you want to use for storage.
Best for: Sound roofs you want warmer
PIR during a re-roof
With the old covering off, boards go in from above, followed by the membrane, battens and new tiles or slate. It is the neatest and most thorough way to insulate a pitched roof.
Best for: Roofs being replaced anyway
PIR during roof repairs
When a slope is stripped for new battens, membrane or tiles, the rafters are open from above. Boards go into that section before it is closed up, so you do not pay to open the roof twice.
Best for: Slopes already open for repair
Warmer lofts start with a roofer rated 5.0
Had a leak in my felt rock called patrick he came and showed me photos Stating i needed a new roof i agreed and they sent to work completed in time and Cleaned up Nice really recomend
I am leaving review because i am very satisfied with new roof these guys have done very clean and professional team really recommend
Apex roofing and guttering Ltd came and gave me a free quotation on a new roof once I match several quotes I decided to go ahead with Apex. They kept me updated throughout the process showing photos and explaining what’s happening the process was so easy for me highly recommend to anyone needing work done
Had a problem on my roof called apex roofing and guttering ltd they came out found the problem and fixed it for me with out hesitation very clean and very good work highly recommend
What can i say i would highly recomend anyone who is looking for a roofer to call apex roofing and guttering ltd they are supper clean and really reliable very satisfied customer
Recomend to anyone needing a flat roof repair or renewal Patrick carried out work for me with he’s team supper clean on time and highly recommend to anyone needing a flat roof
Where the cost of insulation comes from
Insulation is priced on the area, the thickness of board and how it goes in. Working from the loft side takes careful cutting around every rafter, while fitting from above during a re-roof shares the scaffold and labour already on site. Rooms in the roof with sloping ceilings take more work than an open loft. Old wool to clear, awkward access or damp timber all add to it. Patrick agrees a single fixed price with you after the survey.
What sets the price
- Roof area to insulate
- Board thickness
- Loft side or during a re-roof
- Rooms in the roof or an open loft
- Old insulation to remove
- Access into the loft
Roof insulation questions
What is the best insulation for a pitched roof?
PIR boards between the rafters are one of the best options, because they give a lot of insulation for their thickness. That matters in a roof where the depth is limited by the rafters. They are rigid, cut cleanly and seal with foil tape. Mineral wool on the loft floor works for a cold loft, but PIR in the slopes warms the whole roof space.
Can you insulate a roof from the inside?
Yes, PIR boards can be fitted between the rafters from the loft side without taking any tiles off. The team leaves an air gap above the boards so the roof keeps breathing, which matters on older roofs with felt or bare slates. It suits lofts used for storage and rooms in the roof.
Does insulating a roof cause condensation?
It can if the roof is not ventilated properly, which is why the method matters as much as the material. Boards packed tight against old felt or bare slates trap moisture. A ventilation gap above the PIR, or a breathable membrane during a re-roof, keeps the timbers dry. Patrick checks for this on the survey before he recommends a method.
Is it worth insulating a roof when replacing it?
Yes, a re-roof is the best time to insulate, because the covering is already off and the scaffold is already up. Boards go in from above neatly, and the new membrane goes straight over them. Building regulations also expect a roof's insulation to be brought up to standard when the roof is replaced.
Can you insulate a roof while repairing it?
Yes, and it is the cheapest moment to do it. When a slope is stripped for new battens, membrane or tiles, the rafters are open from above and the boards go straight in before the roof is closed up again. Patrick puts the insulation into the one price for the whole job, so there is no second visit and no second set of access costs.
Cold rooms under your roof?
Ask Patrick to look at your loft and rafters and he will show you where the heat escapes and how PIR boards stop it.