Flat rooflights in Marlborough: what is involved?
Flat rooflights in Marlborough means fixed double or triple glazed rooflights for flat roofs and extensions. We cover the SN8 district and the rest of Wiltshire, with a survey before any price is fixed.
Barn and chapel conversions in the South West often need bespoke or shaped rooflights to suit the original structure. Flat rooflights suit landings, bathrooms and rear extensions with flat roofs.
Neighbouring towns include Swindon (16 km) and Devizes (20 km). We offer a survey date when we reply to your enquiry.
Choices for your Marlborough project
- Rain sensor if paired with an opening unit
- Solar-control or self-cleaning outer pane
- Double or triple glazing
- Frame colours: anthracite, black, white or RAL
- Plastered or lined internal reveal
- Even, top-down daylight across the whole room
- Fixed units are simple, quiet and low-maintenance
Before you order: points to check
- Needs a properly formed upstand — usually at least 150 mm above the finished roof surface (check the manufacturer's figure)
- The roof membrane must be dressed up the upstand before the unit goes on
Planning and building rules for Marlborough
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. 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. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Marlborough
These are typical supply-and-fit ranges. For an address in Marlborough, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or triple glazed (1500 × 2500 mm and up) | £2,395 – £4,195 | £1,995 – £3,495 |
| Mid-size double glazed (1000 × 2000 mm) Typical | £1,675 – £2,395 | £1,395 – £1,995 |
| Small double glazed (up to 1000 × 1000 mm) | £1,195 – £1,795 | £995 – £1,495 |
What happens next
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
Other services in Marlborough
Questions about flat rooflights in Marlborough
Can a flat rooflight be walked on?
Not unless it is designed as a walk-on unit with structural laminated glass. A standard flat rooflight is for light only — if the roof is used as a terrace, choose a walk-on rooflight instead.
How long does it take?
Fitting into a prepared upstand usually takes a day. Forming a new opening in an existing roof, including making good inside, is often two to three days.
Will it make the room too hot?
A big unglazed-to-sky area can add solar gain in summer. Solar-control glass, a blind, or pairing a fixed unit with an opening one keeps it comfortable.
Do you fit flat rooflights in Marlborough?
Yes. We survey and fit flat rooflights in Marlborough and across Wiltshire. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Marlborough?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
