Rooflight glass replacement across County Down

Rooflight glass replacement in County Down

Before any rooflight glass unit is fitted in County Down, three measurements get checked: the builder's opening, the external size of the unit, and the upstand height above the finished roof, or the batten and tile details on a pitched roof. Get those right and the rest of the job follows. We handle rooflight glass replacement in every part of County Down, with 4 towns listed on the site and the countryside between them covered too.

Guide prices in County Down

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.

Towns we list in County Down

Coverage in County Down works by postcode, not by distance from an office. Give us the full postcode and we will confirm whether it is standard cover, as it is for most of Northern Ireland, or one of the few remote and island areas handled by arrangement. Either way, you get a written quote before any work is booked, with travel included in the price.

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
Condition of the frame — We look at the frame closely before committing to new glass.
Can the glass come out? — We check whether your rooflight has removable glass or a bonded unit before booking a fitting visit.

Rules that apply in Northern Ireland

Northern Ireland has its own rules. Permitted development for rooflights on a house requires the unit to sit below the highest part of the roof, project no more than 15 cm where the slope faces a road, and stay at least half a metre from the ridge, eaves, party wall and verge. It doesn't apply in conservation areas or within the grounds of a listed building. For building control, structural roof alterations need an application, and rooflights must meet WER Band C or 1.6 W/m²K.

Common questions in County Down

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.

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.