Roof Windows

At Howarth Timber and Building Supplies we offer a range of roof windows from VELUX and Keylite roof windows. Bring Light into your home.

Most popular products in Roof Windows

Welcome to Howarth Online

Want to see what is available in your local branch?

Please enter your postcode below.

Don’t want to give a postcode? Allow us to auto-detect your location

Have an account already? Login here

? Why do you want to know where I am?

We sell thousands of different products which means our stock levels around the country vary.

If you share your location with us we can ensure that the stock levels you see on the site are accurate.

We will never share your location with anyone.

If you proceed without sharing your location with us, we can’t show you accurate stock levels.

Share your location with us

We can’t show you accurate stock levels because you haven’t shared your delivery location with us. Please share your location with us now.

Don’t want to give a postcode? Allow us to auto-detect your location

Roof Windows

Roof Windows

What are roof windows?

Roof windows are often confused with a skylight, a roof window is a great option when you want to allow both light and fresh air into a space into your home.

A skylight is a fixed window where the window itself doesn’t open. Roof Windows do open, so you can enjoy the fresh air into your home aswell as bringing daylight in.

Howarth provide VELUX windows and Keylite windows online and in branch area.

VELUX and Keylite roof windows come in variety of finishes, styles and glazing options.

Keylite Roof Windows:

Keylite roof windows come in different types ranging from centre pivot roof windows, top hung/fire escape and conservation. Whereas VELUX offer a top or bottom operated system of top hung or centre pivot.

Keylite roof windows offer several different finishes; Polar White PVC, White Painted Pine and Clear Lacquered Pine. Each finish has it's own benefits but no matter which you decide on you can be sure that the roof window will transform your room.

The control modes for the roof windows are manual, electric kits with wall switch and premium electric kit with rain sensor. The standard electric kit is connected to a switch via wires, you can have up to two windows per switch. The premium electric kit has an external rain sensor which will automatically close the electric roof window when rain is detected. The premium electric kit is simple to use, simply plugging it in to power it up.

Keylite features:

Expanding thermal collar

 Insulates the frame within the roof expanding to combat thermal bridging and protect against condensation and mould.

Recessed installation

Every Keylite roof window is recessed as standard sitting lower in the roof than before. This enhances the overall appearance of the roof and improves the thermal performance of the window.

Flick-Fit brackets

Pre-Fitted so you can lift the window straight from the box to the roof and install it faster and simply select the setting for tile or slate. On product fitting instructions and no loose brackets or screws help with the speed of installation.

Sash Hinge Finger springs

This feature controls the movement of the sash hinge fingers enabling the installer to refit the sash into the frame in one smooth and easy motion.

Click Fit Hood

Click the hood under the clips and secure. The cover flashings require 50 percent fewer screws than before, making installation faster and easier than ever.

Warm Edge Glazing

All glazing is upgraded as standard to warm edge, which adds protection against condensation.

Ventilation Handle

Slimline ventilation handle has a contemporary style, designed to provide comfortable opening of both the window and ventilation flap. The handle allows for trickle ventilation even with the window fully closed and securely locked.

VELUX Roof Windows

VELUX have been manufacturing roof windows for 75 years and include many features, firstly all roof windows provide energy efficiency and natural ventilation to keep your home warm.

We offer a complete system of roof windows, to suit a wide variety of different needs, including:  


White Painted, Polyurethane or Pine Windows are the popular choices that are suitable for most standard window types. We offer a selection of different operation types including: Manual, Solar and Electric roof windows which are perfect for situations where windows are difficult to reach.  

Can I put a VELUX window in my roof

The type of roof windows VELUX supply are top or bottom operated with top hung roof windows or centre pivot roof window options. It depends on the angle of your roof to what roof window operation you will need. Centre pivot windows are suitable for roof pitches between 15 and 90 degrees. However the top hung windows are suitable for roof pitches between 15-55 degrees roof pitches.

Control Modes

The control modes VELUX offer are manual, solar powered and electric roof windows. The electric roof windows open and close with just one touch of the pre-paired wall switch, so is perfect for out of reach areas. Solar powered windows also offer this functionality, but you don’t need to plug into a power supply so this makes installation even quicker than other control modes.

Installation of roof windows

Videos, Downloads and Brochures are available below for more information on installation of roof windows and if you need any further advice your local branch at Howarth Timber and Building Supplies will be happy to help.

VELUX Glazing

Glazing is provided as standard in all roof windows and all roof windows have high quality pivot hinges for smooth operation. The standard glazing has a laminated inner pane and toughened outer pane and a u-value of 1.3W/m2k.

You can upgrade the glazing on your roof window to standard plus, extra low energy, extra low energy, extra noise reduction and enhanced security. Standard plus glazing is triple glazed and has a laminated inner pane and includes a rain noise reduction glazing and has a u-value of 1.1W/m2k. The extra low energy glazing and extra noise reduction glazing also comes as triple glazed. The difference in these different glazing options is the u-value. The u-value for the extra low energy glazing is 1.0W/m2k and the u-value for the extra noise reduction glazing is 0.81w/m2k.

What is a U-value for windows?

A u-value means the thermal transmittance of a roof window. The U-value measures the amount of energy/heat lost through a square metre of that material for every degree difference in temperature between the inside and the outside. The lower the U-Factor, the better the window insulates.


The ventilation bars on all roof windows lets fresh air into your home even when roof windows are closed. Each window has an easy cleaning feature on the outside of the pane with a built-in barrel bolt.

All VELUX roof windows come with grey aluminium exterior covers as standard.

Velux Guarantee

Click here to view the guarantee documents for VELUX windows.

CE marking

Click here to view the CE marking documents on VELUX's website.

Related Searches

Suggested Categories: Floor, Roof And Wall Construction, Roof Battens, Ecologic Roof Tiles

Free Delivery Free delivery over £150 ex VAT is available on a wide range of products that can be delivered directly to you from your local Howarth branch.
Free Click & Collect Collect your order at a time that suits you from just 1 hour of ordering.
Expert Advice Howarth has been helping build Britain for 180 years, offering you a service, expertise and knowledge that you can rely on.