In-Roof Solar Panels
In-roof solar panels - also called integrated, integral, inset or flush-fitting solar panels - sit in the plane of the roof instead of on rails above it, for a cleaner finish. Installed across Norfolk and Suffolk. Ideal for new builds and reroof projects.
Integrated solar panels, set into the roof.
Instead of sitting on rails above your tiles, integrated solar panels replace a section of the roof covering entirely and sit flush with the surrounding tiles - which is why they're also called in-roof, integral or flush-fitting solar panels. A weatherproof tray system underneath channels any water back onto the roof. It's the finish most self-builders, architects and developers specify, and it's at its best when the roof is being covered anyway - a new build or a full re-roof. Wave Renewables fits integrated arrays across Norfolk and Suffolk, MCS certified, with the same honest, itemised quote as every other job.
- Flush, low-profile finish - no raised frames or visible rails
- Best value on new builds and full re-roofs
- Often preferred (sometimes required) in conservation areas
- Hybrid inverter as standard, so battery storage can be added later
On-roof vs in-roof.
Drag either slider to compare the two finishes on the same roof. On-roof panels stand a few centimetres proud on rails; in-roof panels sit in the plane of the tiles.
Right project, right method.
New build
The roof is open anyway. In-roof panels replace tiles you'd otherwise buy and fit, so the real extra cost is smaller than the headline price difference. The cleanest possible result.
Full re-roof
If you're stripping and re-covering the roof, integrating panels at the same time saves a second job later and avoids drilling a brand-new roof for rail fixings.
Conservation area
Planning officers often favour - occasionally require - a low-profile integrated finish. We'll tell you if that applies to your address.
Existing sound roof
If your roof is in good condition and not due for replacement, on-roof solar is usually the more sensible, better-value choice.
What it adds.
Per panel, in-roof typically costs 10-20% more than on-roof because of the tray and flashing system. On a new build or re-roof that gap narrows, because the panels are displacing tiles and labour you were paying for anyway - and occasionally it works out level or cheaper overall. We give you both figures side by side so you can decide with the real numbers. Domestic solar is currently 0% VAT either way.
In-roof solar FAQs.
They're all names for the same thing: solar panels set into the plane of the roof in place of tiles, rather than mounted on rails on top. "Integrated" and "integral" solar panels, "in-roof" solar panels, "inset" and "flush-fitting" solar panels all describe this approach. Wave Renewables fits GSE-style integrated systems across Norfolk and Suffolk.
In-roof solar panels are integrated into the roof structure, replacing tiles rather than sitting on rails above them. A tray system underneath keeps the roof weatherproof, and the result is a flush, low-profile finish.
It's most cost-effective on new builds or when you're already re-roofing, since the roof covering is being replaced anyway. For an existing roof in good condition, on-roof solar is usually the more practical option.
Per panel, typically 10-20% more because of the tray and flashing kit. On a new build or re-roof the gap narrows, because the panels replace tiles and labour you'd pay for anyway. We quote both so you can compare.
Yes, when fitted correctly. The panels sit in a moulded tray system with flashings that direct any water back onto the roof surface, the same principle as a rooflight. We fit MCS-approved in-roof kits only.
Marginally, in theory - panels sitting flush get slightly less air circulation behind them, so they run a touch warmer. In UK conditions the difference is small and usually outweighed by the tidier finish and the saving on tiles.
Usually not - like on-roof solar it generally falls under permitted development, and the low profile helps in sensitive locations. Listed buildings and some conservation areas are the exceptions; we'll flag it if it applies.
The in-roof cost premium is indicative, from the Energy Saving Trust and UK solar installation cost guides (September 2026). We quote on-roof and in-roof side by side.
Last reviewed September 2026.
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