10/10 Checkatrade · 500+ reviews Open 7 days · 24/7 emergency call-outs Darlington · County Durham · Teesside · North Yorkshire
Roof Windows & Skylights

Velux & Skylight Roof Windows

New Velux-style roof windows and skylights fitted, leaking ones re-flashed and old ones replaced. Bring light into lofts, extensions and stairwells.

  • 10/10Checkatrade
  • 4.7Google
  • 4.4MyJobQuote
  • 30+ yrsTrading
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In short

DG Roofing Services fits new Velux-style roof windows and skylights, replaces old units and re-flashes leaking ones. Most roof window leaks are caused by failed flashing rather than the window itself.

Velux & Roof Windows in Darlington & the North East

A roof window is one of the simplest ways to transform a dark loft, extension or stairwell. Fitted properly, it brings in far more daylight than a wall window of the same size — and with the right flashing kit, it stays completely watertight.

We fit new Velux-style roof windows and skylights into tiled and slate roofs, replace old or failing units, and fix leaking roof windows — which are very often caused by poor flashing rather than the window itself.

Roof windows can also be built into new roofs at the time of a re-roof, conservatory conversion or flat-to-pitched conversion, which is the most cost-effective way to add them.

The benefits

Why It's Worth It

01

More Daylight

Roof windows let in significantly more light than vertical windows.

02

Watertight

Correct flashing kits and underfelt collars for a leak-free fit.

03

Ventilation

Opening windows help reduce condensation in lofts and bathrooms.

04

Neat Finish

Tiles cut and dressed neatly around the frame outside.

What's included

The Full Job

  • Advice on size, position and opening type
  • Opening the roof and trimming rafters as required
  • Fitting the window frame and correct flashing kit
  • Underfelt collar and insulation collar
  • Re-tiling neatly around the frame
  • Replacement of old or leaking roof windows
  • Re-flashing of leaking existing windows
How it works

Our Process

  1. 1

    Survey

    We check the roof structure, tile type and the best position for light.

  2. 2

    Open Up

    Tiles and battens are removed and the opening is formed.

  3. 3

    Fit & Flash

    The window is fixed and the flashing kit installed to suit your tiles.

  4. 4

    Make Good

    Tiles are refitted around the window and everything is left watertight.

Recent work

Our Projects

Real jobs completed by DG Roofing Services. Tap any photo to enlarge.

All projects

Rear Extension Warm Roof Conversion

A tired flat roof over a rear extension rebuilt as an insulated, tiled pitched roof with roof windows.

Reviews

Don't Take Our Word For It

All reviews
Checkatrade

Excellent roofer highly recommended

“We had water getting into our extension and noticed our ridge tiles were loose too. D G Roofing came out, knew exactly what the problem was straight away, and gave us a really reasonable quote. They were back just a couple of days later to get started, and even fixed a couple of small things they spotted along the way — all within the original price. Absolutely delighted with the work; I'd have no hesitation in recommending them!”
Verified customer · DL6
Google
“Very pleased by the work completed, which was replacement ridge tiles using a dry ridge system and sorting out an issue with water drainage into the gutters. We were kept up to date on the job timing beforehand. The DG team was great to deal with. The job was completed promptly within 3 working days. The DG team made sure that the site was left clean and tidy. The price for the job was very competitive. I wouldn't hesitate to use DG Roofing services again if I have any more issue with my roof.”
Peter B.
MyJobQuote

Repair Leak in Pitched Roof

“The lads rang up this morning, asked for some photos and diagnosed the problem straight away. Came out the same day, completed the job in no time at all. Both a friendly bunch of lads, showed photos of before and after the work (too high up to see myself) and went through everything in detail. They offered various solutions and gave a great price. I’d absolutely recommend 10/10!”
Chris · Sep 2025
Questions

Frequently Asked

Can't see your question? Call Daz — he's happy to give honest advice, even if you're not ready for a quote.

Do I need planning permission for a roof window?

Roof windows often fall under permitted development, but there are limits, and different rules apply to listed buildings and conservation areas. Check with your local council or the Planning Portal before work starts.

Why is my Velux window leaking?

The most common causes are failed or poorly fitted flashing, blocked drainage channels, or condensation that looks like a leak. We can inspect and re-flash or replace the window as needed.

Can you replace an old roof window with a bigger one?

Often, yes — depending on the rafter spacing and roof structure. Daz will check on the survey.

Free, no-obligation estimate

Get a Free Velux & Roof Windows Quote

Fill in the quick form and it opens WhatsApp with your message ready to send straight to Daz. Add photos of the roof in WhatsApp for a faster quote. Prefer to talk? Call any time.

  • Estimates within 24 hours
  • Fixed prices — no hidden extras
  • Photos of the problem and the finished job
  • Site left clean and tidy

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Free, no-obligation quote.
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