VELUX Window Installers › St Mellons
A roof window brings daylight into a loft, and on the modern estates of St Mellons there is plenty of loft space waiting to be used. Most of the work is not the window itself. It is the flashing, the framing of the opening and the sealing and insulation around it.
We fit VELUX and similar roof windows in lofts converted to bedrooms, offices and play rooms, and in landings and stair voids that need more light. We check the roof covering, the rafters and the loft layout first, and explain what the opening involves before anything is cut.
Call 07766 547309 about velux window installers in St Mellons, or message us on WhatsApp.
Roof windows on St Mellons houses
Many homes in Old St Mellons, Pontprennau and Castleton were built with trussed rafters or roof designs that suit a loft conversion. Others, in Rumney and Trowbridge, have a more traditional cut roof. How the roof is built decides whether the rafters can be trimmed to take a window. We check that on site.
Most roofs here are concrete interlocking tile, and each tile profile needs a flashing kit made for it. A kit that does not match the covering is the usual cause of leaks around a roof window, so we choose the kit to the tile and not the other way round. That is how we avoid the common leaks.
East Cardiff gets a lot of damp, mild weather, and a loft room brings its own condensation risk. We line and insulate the opening carefully, with a vapour control layer, so the room stays dry. Many chimneys here are small or unused, and we plan the window position around them. That keeps the finished room usable.
Roof window jobs we do in St Mellons
- Loft conversion roof windows — We fit one or more roof windows to bring light and headroom into a loft room, positioned to suit the floor layout and the rafters.
- Replacement roof windows — An old or misting window can be swapped for a new one, with the flashing and seals renewed to match the roof covering.
- Flashing kit matching — Each window gets a flashing kit matched to your tile profile, because a poor match is the usual source of leaks round a window.
- Rafter trimming and framing — Where the opening cuts into rafters, we trim and double them up as needed, checked on site against the roof structure.
- Lining, insulation and vapour control — The opening inside is lined, insulated and sealed with a vapour control layer, so heat stays in and condensation is kept down.
- Leak and misting checks — If an existing window leaks or mists, we look at the flashing, seals and surrounding roof covering before blaming the glass.
How we approach a roof window here
We begin with the loft and the roof. We look at the tile type, the rafters and the available head height, then walk through the options for window size and position. We also explain what may need planning or Building Regulations checks, and we advise before work starts.
On the day we strip tiles round the opening, trim the rafters, fit the window and flashing, and refit the tiles. Inside, the opening is lined, insulated and sealed. We protect floors and clear everything away, and show you how the window opens and cleans. Then we tidy up.
VELUX Window Installers Guides for St Mellons
VELUX Window Installers in St Mellons — Common Questions
Can any St Mellons loft take a roof window?
Most can, but it depends on the roof structure, the rafters and the head height inside. We check the loft and the roof on site and tell you what is possible, and which positions work best. Call us for a proper look.
Why do roof windows leak?
Usually the flashing, sealing, condensation or the roof covering around the window, rather than the glass. A flashing kit that does not suit the tile is a common cause, so we match it to your roof.
What does misting between the panes mean?
Misting means the sealed glass unit has failed and moisture has got between the panes. The glazing needs replacing. We can look at it and tell you whether the surrounding flashing and seals are sound.
Do rafters have to be cut for a roof window?
Often one or two rafters are trimmed, with the opening framed and doubled up to carry the load. We check the structure on site first and tell you what the window position involves.
Do I need permission to add a roof window?
A roof window may need planning or Building Regulations checks, and we advise before work starts. Call us for a proper look at your loft and we will explain what applies. We explain the options clearly.
More Roofing Help in St Mellons
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Contact T&T Roofing in St Mellons
We cover St Mellons and the area around it including Rumney, Trowbridge, Llanrumney, Old St Mellons, Pontprennau.
Tell us what the roof is doing in St Mellons and we will look at it. Call 07766 547309, message us on WhatsApp or use the form below.