VELUX Window Installers › Bridgend › Guide
Turning a loft into a bedroom or study usually means bringing daylight in through the roof slope. A roof window is the usual answer, but the job is more than cutting a hole. The structure, the flashing, the insulation and the finish all have to work together to keep the room warm and dry.
Planning the position and number of windows
We start in the loft, looking at where the rafters run, how much head height there is and what sits below the slope. Window position affects the view, the light and the headroom. On Bridgend terraces with a deep back slope there is often room for two windows side by side, but we confirm that on site. Dormers and extra headroom are a separate question, and we keep this job to the roof windows themselves.
Forming the opening in the rafters
Fitting a window means cutting through one or more rafters, so the neighbouring rafters are doubled up and trimmed to carry the load around the opening. This is checked on site, because older roofs in Bridgend can have uneven rafters. Tiles around the opening are lifted and set aside for refitting afterwards.
- Rafters measured and marked before any cutting
- Trimmers and doubled-up rafters fitted around the opening
- Battens adjusted to suit the window frame
- Tiles carefully lifted and kept for the surround
Choosing and fitting the flashing kit
Each roof window must be matched to a flashing kit made for your roof covering, whether that is slate, plain tile or concrete tile. The kit directs water round the window and back onto the roof. Getting this wrong is the most common reason new windows leak, so we choose it before we order the window. Slate on older Bridgend terraces needs a different kit from concrete tiles on the later estates.
Lining, insulation and vapour control
Inside the room, the opening needs insulation, a vapour control layer and a lining that closes the gap between the window and the plaster. These details cut down condensation and cold spots. They sit between our roof work and the room finishes, so we agree with you where our work stops and the next trade begins.
- Insulation packed around the window frame
- Vapour control layer sealed to the frame
- Lining boards or reveals formed neatly
- Clear handover point for plastering and decoration
Rules, timing and finishing off
Many loft conversions need planning or Building Regulations checks — we advise before work starts. We open one section of the roof at a time and keep the house covered while we work. Once the window is in, we check it opens and closes, tidy the loft, and leave the surround weathertight. Clear notes on each step mean the other trades can follow on without delay.
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Common Questions
How many roof windows does a Bridgend loft conversion need?
It depends on the size of the room and the slope. A small study may need one, while a bedroom often has two. We look at the loft, the light you want and the rafter layout, and suggest what makes sense.
Can the work be done without taking the whole roof off?
Yes. For roof windows we open only the area around each opening, then close it up again. The rest of the roof stays in place, which keeps the house much drier and the job quicker.
Will the window be leak-proof?
A correctly matched flashing kit, careful sealing and proper fitting give a window the best chance of staying dry. Leaks usually come from poor flashing or sealing, not the glass, which is why we spend our time on those details.
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Tell us what the roof is doing in Bridgend and we will look at it. Call 07766 547309, message us on WhatsApp or use the form below.