Cost of installing Velux Window or Skylight
Roof window installation and price guide
A roof window is a fantastic way to bring more light into a room as they allow the sunlight to transform those dark and dingy areas of your home and can add value of your property too. Roof windows are often called Velux windows, even though Velux is actually a brand name for a particular roof window manufacturer. Roof windows or sky lights come in a variety of forms, shapes and brands, with Velux being just one of the more popular manufacturers.
There are a large variety of styles and designs to suit all types of property too plus numerous features to choose from including locking options and even remote opening mechanisms. Having a roof window fitted is not cheap, on top of the window cost itself, the labour required can be expensive as roof timbers will need to be cut and you may also need some extra roof supports and even some plastering after the job is completed.
Example roof window prices
Points to consider
There are a number of factors which you need to be aware of with roof window installations, all of which can increase the price. For example, scaffolding if required can easily add a few hundred pounds to the price, although you’ll not normally need scaffolding if you’re just having a simple Velux window installed, sometimes access is difficult so scaffolding will be required at extra cost.
Vapour barriers will also need to be added to prevent condensation on all new roof window installations, and extra features such as remote opening, security or tinted glass, opening rods and blinds or shutters can all cause the costs to spiral out of control if you are not careful. To keep the costs down, you can opt for a simpler roof window rather than a Velux window, and be careful with the special features.
Though adding a roof window of any type is not cheap, it will often add value to your property and may not be as expensive as you think. Pay particular attention to ventilation when fitting a roof window to a bathroom. Velux and other roof windows now offer variable ventilation settings which are essential in bathrooms where moisture and condensation can build up.
Doing it Yourself
Normally Velux and other roof windows can be fitted entirely from the inside, so there is no need to access the roof or hire scaffolding. The windows also come with detailed installation instructions, however, installing a roof window is not really a suitable job for a DIY enthusiast, as not only will you need to cut into the roof cutting through support rafters, you will also need to observe Building Regulations and Planning Permission laws, so will need to talk to the building control department of your local council.
If the window(s) is part of a full loft conversion for habitable use, you will need at least one window in each space created with at least 0.33 square metres of slope opening, plus an escape or MOE window installed no more than 1.7m from the roof eaves which can be accessed from inside easily and at the same time be reached from an outside ladder. But if installing a roof window in a space just used for occasional storage, then you can install pretty much any size of window in any sensible location as long as you do not weaken the roof support structure in any way. To make the opening, remove tiles or slates from the area by cutting away the felt from underneath then cutting away the battens from underneath to slide a tile out and into the roof space.
Then you will be able to cut away the roof timbers to make the size of opening required as per the window instructions. You will, of course, need some additional timbers to strengthen the roof and to make the new framework for the window. Then fit the new window frame into the opening using fixing brackets supplied and fit the roof flashing to the new window frame and roof watertight. Then lay tiles or slates into position around the new window frame and finally fit the sash (opening section) of the window into the frame. You are now ready to make good and redecorate inside.
Conservatory Roof Replacement Cost
Costs of Changing your Bay Window
Cost of Triple Glazed Windows
uPVC Windows Installation Cost
The Cost of Secondary Glazing 2019
Velux and Skylight Window Cost
Cost of installing a Roof lantern
Professional Window Cleaning Cost
Window Condensation Removal and Reseal
Roof window checklist
- If converting a loft then you may need a secondary means of escape such as a Velux escape window
- Roof windows are traditionally centre-pivot or top-hung opening windows
- Not all roof windows are Velux windows, though Velux is a well respected manufacturer
- Roof window frames are available in timber or uPVC
Hiring a Tradesman Checklist
- Always get at least 2 quotes before hiring.
- Never pay the full amount upfront.
- Get the quote in writing.
- For any payment you make, always get a receipt.
- On more expensive jobs, ask for references.
- Check if the tradesman is a member of any trades associations.
- Make sure the tradesman has public liability insurance.
What's the difference between a roof window, a skylight and a roof-light?
What roof window size qualifies as a means of escape?
How long will a roof window last before needing replaced?
Are the flashings essential?
I have heard roof windows are bad for leaking, can a roof window leak?
Velux windows leaking. Suspect flushing may need replacing. Any idea of cost/time.
Submitted by Brian
Install a1m x 1.5m lantern in a flat roof- lantern will be supplied so need cost for labour and any other materials to make job good during installation.
Submitted by Andrew
We have a large flat roof in kitchen extension. Looking to put 2 sky lights in there.
Submitted by Petros
I am soon to move into a ground floor flat that has two small windows. I would like to make that into a large window. Also potentially add a skylight depending on costs.
Submitted by Glen
I already have three top hinge roof windows fitted. I am potentially looking to replace all three. I will need the replacements purchased and fitted. Due to the easy of cleaning of windows, it may make more sense to have centre pivot windows.