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RooflightInstallers.co.uk
Castlereagh · BT6 · County Antrim

Rooflight glass replacement in Castlereagh

Glass replacement is a two-visit job. On the first, the fitter checks the frame, the gaskets and the drainage, and measures the existing unit exactly, including its thickness and glass type. That visit is charged and priced before booking. Once the new sealed unit has been made, the second visit takes the old glass out, cleans and checks the rebate, and beds the new unit in. We do this for rooflight glass units in Castlereagh.

Guide price from £445 · Supply & fit of the glass

Guide prices in Castlereagh

Small sealed unit

£445 – £795including VAT at 20%

Misted or cracked unit up to about 1 m² measured, made and refitted

Medium sealed unit

£795 – £1,295including VAT at 20%

Units up to about 2 m², or toughened and laminated

Large or specialist

£1,295 – £2,395including VAT at 20%

Triple glazed, solar-control or heavy units needing lifting gear

Guide ranges. The first visit is charged and priced before booking; any new glass is priced in writing before work starts. 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.

Covering BT6 and neighbouring districts

Covering Castlereagh means covering the people who live and work there, not a single postcode. We take on domestic and commercial jobs in BT6, BT5 and BT7, and are happy to quote further out in Belfast and Newtownabbey. If your address sits between towns, tell us and we will confirm whether it falls in our normal area or needs travel set out separately on the quote.

What the job includes

  • Frame rebate cleaned and checked for damage, corrosion or failed seals
  • New glazing tapes, gaskets or sealant fitted to suit the frame
  • New unit set on packers, then beaded, capped or bonded as designed
  • Condensation or a failed seal — We confirm whether the mist is inside the sealed unit or on the room-side surface.
  • Weight and lifting — We plan how a heavy pane gets onto the roof and into the frame.

How the glass is replaced

The second visit is the quick one. With the new unit made to size, the fitters take the old glass out, check the frame and drainage paths, and set the new glass on packers so it sits square and drains properly. Seals and cappings are renewed where needed, the area is cleared, and you are shown what was done.

Regulations for Castlereagh properties

For a home in Northern Ireland, check planning first: rooflights are excluded from permitted development in conservation areas and within the curtilage of listed buildings, and elsewhere must keep 0.5 m clear of the ridge, eaves and verges. Then building control: a new opening alters the roof structure, so expect a building control application and confirm with your council, and the glazing must achieve WER Band C or 1.6 W/m²K. We check both for your address before quoting.

What to send us

Photos of the problem glass from inside and out, a rough width and length, and whether the rooflight opens or is fixed are enough to price the first visit. Add the postcode and how the roof is reached, and tell us if more than one unit has misted.

Common questions in Castlereagh

Is new glass or a new rooflight better value?

If the frame, gaskets and drainage are sound, new glass is usually the cheaper fix. If the frame is cracked, distorted or leaking at the kerb, a full replacement is better value. After the measuring visit we price both so you can compare.

Can you replace just the glass in my rooflight?

Often, yes. If the frame, gaskets and drainage are sound, a new sealed unit can go into the existing frame. If the frame has failed, is distorted or leaks around the edge, replacing the whole rooflight is usually the better answer, and we tell you that.

Is the measuring visit charged?

Yes. The first visit measures the existing glass and checks the frame, and it is charged. We confirm that price before you book. The fitting of the new glass is then priced in writing, so you see the full cost before anything is ordered.

Send photos of the problem in Castlereagh and we will price the visit before you book it.

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

Glass replacement in Castlereagh

Send photos of the problem and we will tell you what a visit costs before booking.

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