Velux Window Installation in Swindon, Wiltshire & Bristol

Velux is the leading manufacturer of roof windows — the name has become a generic term for any roof window in much the same way as "Hoover" for vacuum cleaners. Velux windows are fitted into the slope of a pitched roof (or into a flat roof using a dedicated flat roof unit) to bring natural daylight and ventilation into loft spaces, upper floors and rooms below flat roofs. They are available in a wide range of sizes, with centre-pivot, top-hung, electric and solar-powered opening options.

A Velux window brings natural daylight into spaces that would otherwise be dark, improves ventilation (which helps reduce condensation and moisture build-up), and can add usable floor area by making a loft space feel more open and liveable. Modern Velux windows are double-glazed with low-emissivity coatings for energy efficiency, and they can be specified with blinds, insect screens and noise-reduction glazing where needed.

The cost depends on the window size, the type of opening mechanism, your roof type and whether any structural alterations are needed. As a rough guide, a single centre-pivot Velux window supplied and fitted into an existing pitched roof — including the flashing kit, internal lining and making good the tiles around it — typically costs between £800 and £1,500 in the Swindon and Wiltshire area. Electric and solar-powered models, larger sizes and flat roof units will be higher. We provide free fixed-price quotes after assessing your roof.

Modern Velux windows are double-glazed as standard, with low-emissivity glass coatings and argon gas fill between the panes to reduce heat loss. They carry an energy rating and are designed to meet current Building Regulations for thermal performance. Compared to older single-glazed or early double-glazed roof windows, a new Velux window will significantly reduce heat loss through the roof opening.

Velux produces windows for pitched roofs (with a minimum pitch of around 15°, depending on the model) and flat roof units for roofs with a pitch of 0° to 15°. They can be installed into slate, tile, flat felt, GRP and metal roofs — each uses a different flashing kit designed for that specific roof covering. In practice, we can fit a Velux window into the majority of roof types found across Swindon, Wiltshire, Bath and Bristol.

The main options are centre-pivot (the most common — the window rotates around a central hinge for cleaning and ventilation), top-hung (hinged at the top for a clear opening, suited to lower installations where you want an unobstructed view), electric (opened and closed by a wired motor with a wall switch or remote control), and solar-powered (battery-powered motor charged by an integrated solar panel — no wiring needed, ideal for hard-to-reach positions). We can advise which type suits your room and roof during the quote visit.

A single Velux window installation — including cutting the opening, fitting trimmers, installing the window and flashing kit, and re-tiling around it — typically takes one day. If scaffold is needed for access, this is usually erected the day before. Multiple windows on the same roof may take an additional day. Replacement of an existing Velux window with a new unit in the same opening is usually quicker — often half a day.

It is possible if you have roofing experience, but we would not recommend it as a DIY job. The work involves cutting rafters, fitting structural trimmers, correctly installing the window and flashing kit, and ensuring a weathertight seal with the surrounding tiles or slates. An incorrectly fitted Velux window will leak — and the damage caused by a persistent leak around a roof window can be significant. Professional installation also ensures compliance with Building Regulations where applicable.

Velux windows are low-maintenance. The glass can be cleaned from inside the room by rotating the centre-pivot sash 180°. The external finish (either painted wood or polyurethane-coated) does not need repainting. The main maintenance point is to check the flashing seal and surrounding tiles periodically — particularly after heavy storms — and to clear any debris that has collected in the gutter or flashing channels around the window frame.

Call us on 0800 191 0841 (Freephone), 0117 322 6856 (Bristol) or 01793 230 678 (Swindon), or fill out the contact form on this page. We will arrange a free site visit to assess your roof, discuss window options and placement with you, and provide a written fixed-price quote.