Skylights and rooflights in Isleworth
We survey, supply and fit skylights and rooflights in Isleworth and the TW7 district — flat rooflights, roof lanterns, roof windows, walk-on glass, sun tunnels and commercial rooflights.
Many London roofs are reached only through the house or over neighbouring property, so lifting heavy glass is planned at survey rather than on the day.
Isleworth is around 15 km from central London, and we survey and fit throughout that part of Greater London, including the TW7 district.
Flat roof rooflights in Isleworth
Lanterns & glass roofs in Isleworth
Pitched roofs & lofts in Isleworth
Commercial rooflights in Isleworth
Upgrades, repairs & fitting in Isleworth
Planning and building rules in England
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Towns near Isleworth
Skylight questions: Isleworth
Can you work alongside my builder in Isleworth?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do I need to be at home for the survey in Isleworth?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Will I need planning permission in Isleworth?
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge.
How do I book a survey in Isleworth?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Fixed or opening?
Opening units suit kitchens, bathrooms and bedrooms; fixed units are simpler and cheaper where the room already ventilates well.
Will a rooflight make my room too hot?
It can on a south-facing roof with clear glass. Solar-control glass, an opening unit and a blind keep the room comfortable.
