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Blackwood · NP12 · Gwent

Fit-only rooflight installation in Blackwood

Fit-only rooflight installation in Blackwood comes down to what happens around the glass. A good unit sat on a poor upstand, or with the membrane or flashing cut short at the corners, will still let water in. We fit each rooflight to the maker's instructions for fixings, packers and sealant, for homes and businesses across Blackwood and the rest of Gwent. That covers supply and fit, fit-only for a unit you already own, and swapping out a tired one. Every job starts with a written quote, so the price and scope are clear before anyone climbs a ladder.

Guide price from £445 · Labour only — you supply the rooflight

What the job costs in Blackwood

Onto a ready upstand

£445 – £795including VAT at 20%

Customer-supplied unit up to about 1.5 m², fitted to a prepared kerb, sealed and trimmed

With a new upstand

£795 – £1,295including VAT at 20%

Insulated timber upstand built, membrane turned up and dressed, unit fitted and sealed

Large or heavy unit

£1,195 – £2,145including VAT at 20%

Extra hands or lifting gear, larger openings, fixed or opening units

Guide ranges for labour only — you supply the rooflight. Your price is fixed in a written quote after we have seen photos or surveyed. Scaffold, access towers or a crane are priced separately if the job needs them, and building control fees, where a job needs them, are shown as their own line.

Coverage in and around Blackwood

Looking at a property near Blackwood but not quite in it? We work across NP12, CF82 and CF81 and outwards to Gelligaer, Risca and Caerphilly. Give us the full postcode when you get in touch, because access, parking and the route for a large unit all depend on the exact street. Those details shape the quote for any job around Blackwood.

Your rooflights or ours

Your unit or ours, the fitting standard is the same. For supply and fit we choose a rooflight to suit the roof and price it with the installation. For fit-only we work with what you have, after confirming it arrived undamaged, that it matches the builder's opening, and that the upstand will sit at the height the maker asks for. Report any transit damage to the seller, as the product cover is theirs and the maker's. Our written guarantee applies to the fitting itself.

What we do on the day

  • Internal reveal trimmed or lined, with the protective film removed at the end
  • Unit bedded on the sealant or tape the maker specifies, then screw-fixed
  • Upstand height, level and fall checked, and squareness confirmed across the diagonals
  • Internal versus external size — We check whether your rooflight's quoted size is the hole size or the outer frame size.
  • Upstand height above the roof — We measure how far the upstand stands above the finished roof surface, including any ballast or walkway.

From arrival to clean-up

Where a job takes half a day to a day, the split is usually structural work first and finishing second. Early on, the fitters cut or prepare the opening, trim where needed and prepare the upstand or flashing. Then a rooflight is lifted in, fixed and made weathertight so the roof is sound before anyone moves inside. Plasterboard, trim and filler for the reveal come after. Each evening the work area is swept, and at the end the glass is cleaned and the team talks you through what was done.

Regulations for Blackwood properties

For a Welsh home, start with where the house is. In a conservation area, National Park, AONB or World Heritage Site, a rooflight needs planning permission; outside those, permitted development usually covers one that projects 150 mm or less. Side-facing roof windows within 10.5 m of a boundary must be obscure-glazed and fixed. New openings need building regulations approval, and replacements we fit are notified with a building notice, as we are not registered with a competent person scheme. We confirm all of this for your address.

Help us quote accurately

Keep it simple. Two or three photos, outside and inside. Approximate sizes. What the roof is made of. Anything awkward about getting up there, such as a conservatory below, a narrow side path or no parking. If you bought the rooflight online, the link or model name. Then your postcode in or around NP12. That is enough for a first price.

Common questions in Blackwood

Do you cover Blackwood?

Yes. Fitters travel to addresses in Blackwood and the surrounding districts, including NP12. We do not run an office there; the survey and the fitting happen at your property. A few island and remote postcodes are covered by arrangement; if yours is one, we confirm travel and dates before quoting.

What upstand height and roof pitch does rooflight fitting need?

It depends on the product. Manufacturers usually specify a minimum upstand height above the finished roof surface, and a minimum pitch on the glass so rain runs off. We follow the maker's figures for your unit rather than a rule of thumb. If your existing kerb or roof falls short, we explain the options, such as raising the upstand or choosing a unit with built-in pitch.

Will my new rooflight leak?

A correctly fitted unit should not. Leaks usually trace back to the detail around the frame: an upstand that is too low, a membrane or flashing that is not dressed properly, sealant applied to a damp surface, or water ponding against the kerb. We fit to the maker's instructions and check each of those points. The fitting carries a written workmanship guarantee, with its terms set out on your quote.

Planning a rooflight in Blackwood? Tell us about the roof and we will come back with a clear price in writing.

Rear extension at dusk with lit rooflights and a roof lantern
Ready when you are

Fit-only fitting in Blackwood

Send photos and rough sizes, or ask for a survey for install work. One fixed written price before anything starts.

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