Velux & Roof Window Installation in Gosforth, Newcastle.

The flashing kit is the whole job

A roof window is only as watertight as the flashing around it, and flashing kits are not interchangeable. Slate needs a different kit from a profiled concrete tile, which needs a different kit again from a plain tile. Fit the wrong one — or bed the window in mortar, which we still see — and it will leak, usually within the first winter. Getting this right is most of what you're paying for.

• New roof windows into an existing loft or loft conversion
• Direct replacement of old or failed Velux units
• Re-flashing existing windows that have started leaking
• Upgrading single to double or triple glazed units
• Blinds, and electric or solar-operated units
• Flat roof windows and sun tunnels

How the installation works

On a straight swap for the same size unit, we're in and out in a day. A brand new opening means cutting and trimming the rafters, which needs doing properly — a trimmed opening carries the load the cut rafter used to. We'll tell you at survey if the opening needs Building Control sign-off.

1. Free survey — covering, pitch, rafter spacing and window size checked
2. Fixed written quote including the correct flashing kit
3. Safe access set up
4. Existing covering carefully stripped back around the opening
5. New opening cut and rafters trimmed, or old unit removed
6. Window fitted square, insulated collar and underfelt collar dressed
7. Correct flashing kit fitted and the covering re-laid around it
8. Internal reveal made good if that's part of the quote

What it costs

A like-for-like replacement is the cheapest option — the opening already exists. A new opening costs more because of the timber work and making good inside. The window itself is a known price; we'll show you the options rather than picking for you.