VELUX Window Installers › Port Talbot › Guide
Fitting a roof window looks simple from inside the loft, but most later problems trace back to something missed at the start. In Port Talbot the mix of terraces, interwar semis and exposed bay-side roofs means every job needs its own look. Here is what we check, in the order we check it, and what you can look at yourself from inside.
Is there enough height and floor space
A window brings light and headroom only if the loft can use it. We measure from the floor to the ridge and to the rafters, and look at where you would stand under the window. Many Port Talbot interwar semis have good height in the middle of the loft but little near the eaves, so position matters.
It also helps to think about furniture, bed positions and how you will open and clean the window. We talk this through at the visit so the position works for daily use as well as for the roof. That small piece of planning saves trouble later and means fewer surprises on the day.
- Standing height under the planned window
- Access to the loft space for materials
- Floor strength where people will walk
- How the window will open and be reached
The roof structure around the opening
Cutting an opening means trimming rafters and doubling up the timbers around it. We check that the rafters are sound, the spacing suits the window size and the structure can take the change. On older terraces around Taibach and Cymmer, timbers can be tight and tired, so we look carefully before agreeing a position.
The roof covering and the right flashing kit
A window must be matched to a flashing kit for the roof covering. Concrete interlocking tiles, plain tiles and slate each need a different kit, and the wrong one is a common source of leaks. We identify your covering first, and if it is worn near the opening, we tell you before cutting into it.
If the covering is brittle, heavily mossed or has slipped tiles near the planned opening, we flag it first. It is better to deal with a weak area before the window goes in than to disturb the roof twice. That small piece of planning saves trouble later and means fewer surprises on the day.
Exposure to wind and driving rain
Roofs close to Swansea Bay at Sandfields, Aberavon and Baglan take driving rain and strong gusts. A window there needs careful sealing and flashing, and the slope it sits on matters. We often favour the rear, sheltered pitch where the layout allows, though light and aspect sometimes win out.
Insulation, lining and what the rules might need
Around the opening we plan the lining, insulation and vapour control so condensation does not form on cold surfaces. Poor detail here causes damp patches that look like leaks. Some roof windows may need planning or Building Regulations checks, and we advise before work starts.
- Insulation continuous around the frame
- Vapour control sealed at the reveal
- Lining finished neatly inside the room
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Common Questions
What is the first thing to check before fitting a roof window?
Whether the loft has enough usable height, and whether the roof structure can take an opening. We measure and inspect the rafters and covering before we agree a position or quote for the job.
Does the roof covering affect which window I can fit?
Yes. The flashing kit must match the covering, whether concrete tiles, plain tiles or slate. A mismatch is a common cause of leaks, so we identify your covering before ordering anything for the opening.
What can I check myself before you visit?
From inside the loft, look at the headroom, the rafters and any damp staining. Do not go on the roof or use a ladder to it. Note anything you see and call us for a proper look.
Get a Quote in Port Talbot
Tell us what the roof is doing in Port Talbot and we will look at it. Call 07766 547309, message us on WhatsApp or use the form below.