What do flat rooflights in Gravesend involve?
Thinking about flat rooflights in Gravesend? The short answer: fixed double or triple glazed rooflights for flat roofs and extensions. The longer answer depends on your roof, which is why we survey before we price.
Many South East homes have been extended more than once, and an old dome over an earlier extension is often due for replacement. Typical uses for flat rooflights include landings, bathrooms and rear extensions with flat roofs.
Gravesend sits about 5 km from Grays and 9 km from Strood, and we cover the whole DA12 postcode district and the roads in between.
Options we can specify in Gravesend
- Plastered or lined internal reveal
- Rain sensor if paired with an opening unit
- Integral or fitted blinds
- Double or triple glazing
- Solar-control or self-cleaning outer pane
- Pairs with an opening unit where you also need ventilation
- Slim sightlines from inside — mostly glass, little frame
What to check first
- 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 Gravesend
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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. 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.
Flat rooflights prices in Gravesend
These are typical supply-and-fit ranges. For an address in Gravesend, 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 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Gravesend address.
- Measure and check. A surveyor visits Gravesend, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Flat rooflights near Gravesend
Other services in Gravesend
Common questions
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.
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.
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.
Is the survey in Gravesend free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Do you fit flat rooflights in Gravesend?
Yes. We survey and fit flat rooflights in Gravesend and across Kent. Send your postcode and we will offer a survey date when we reply.
