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one of the first considerations and one that is directly relevant to how much light will pass through it. Factors like rafter spacing and tile details will need to be taken into account here and your builder or roofer will be able to advise you on this. If your intention is for maximum light then try


to avoid options with a significant amount of framing, such as lanterns and pitched types. These will allow less light through them than frameless types.

uPVC will be the cheapest of the three but in the case of pitched roof lights can sometimes look chunky and clumsy, especially if the roof light itself is small. Aluminium offers slim sight- lines to maximise the amount of glass and is arguably the best option as it ticks the cost, design, size and low-maintenance boxes on your wish list. For properties that are of a more traditional design the timber option will be more appropriate.


Whichever roof light you choose, it’s very likely that you will have the option of specifying it to open for ventilation purposes and in some


Do you require ventilation through the roof light? Will you require it to open?

Material type? The three main options here are uPVC, aluminium and timber.

How much light do you require? The size of your roof light will of course be

cases, even for access purposes. Those of us that remember our physics lessons

will know that hot air rises and, with built-in opening mechanisms, this air can be quickly released therefore avoiding uncontrollable tem- perature increase through solar gain in the living space below.

roof light is within easy reach you may only require a handle or a manual winding rod. For less accessible situations, much better to specify a remote opening control via a switch on a wall or a hand-held remote controller or even temper- ature sensors for automatic opening and rain sensors for automatic closing.


glass that meets the requirements of the UK Building Regulations, however there are addi- tional choices. If your roof light is likely to be south facing


then you might need to consider restricting the amount of heat passing through the glass from the sun to reduce solar gain. This can very easily be done by specifying solar-control glass, which can reduce the UV rays that pass through the glass itself by up to 80 per cent with only a small loss of light transmittance and at not much extra cost.

Which type of glass will you choose? Your chosen supplier will supply you with

If it opens, will it be accessible or will you require remote operation? If your




Self-cleaning glass is another worthwhile

option. It may not be as magical as its name suggests but, due to its coating on the exterior surface, it will encourage the rain to sheet down the glass taking most of the dirt with it and reducing the need for cleaning. Both this and the solar-control options should be available from all reputable suppliers. Whichever of the above options you choose

and whichever product you specify, you will undoubtedly enrich your living experience to the point when you will wonder why you didn’t do it sooner!

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When it comes to choosing Aluminium Gutters & Pipes, it’s as simple as A R P

There is a large range of gutter profiles including, half round, beaded, beaded deep flow, ogee and box.

Our complimentary range of pipes are available in diameter, square and rectangular profiles with flush joint, swaged or cast collars.

ARP also offer the Mustang Seamless gutter system offering up to 30 metres in one length giving a smooth uninterrupted appearance. The only BBA approved system.

Visit our website for the complete range, or ask for one of our Technical Product Guides

For more information about our specification service, call today on 0116 289 4400 or email us at

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selfbuilder & homemaker

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