Rooflights

Rooflights save energy

Independent research proves conclusively that rooflights can save energy in many applications, and the greater the rooflight area the greater the potential savings.

The amount of energy needed to light a building artificially is often much greater than the amount of energy used to heat it, and is often the greatest single energy use in operating the building. When used in conjunction with automatic lighting controls to turn the electric lights down, or off, then rooflights can have a major impact on the overall energy consumption of a building, cutting energy costs by reducing the need for the use of electric lights.

Rooflights are usually less well insulated than the surrounding opaque areas of the roof, but have very little effect on the total energy required for heating, as the beneficial effects of passive solar gain compensates for the poorer insulation.

Electricity used for lighting is much more expensive in terms of CO2 than gas used for heating, so including large areas of rooflights is one of the single most effective ways of improving the environment.

Using rooflights to provide a bright, naturally lit interior will save money, provide a more pleasant environment people want to spend time in and contribute to the government’s target to reduce emissions of CO2.

Natural Daylight is a vital element in our daily life. The general pattern of life for humans is to sleep at night and work and play during the daylight hours. Our brain functions and responds to the stimulus of daylight. Providing natural daylight into the working environment is of fundamental importance for the well being, efficiency and safety for the people in that environment. The electric light bulb is a poor substitute

Here at Twinfix we offer a wide range of products that can be used for rooflights and for ease we have split these into four separate divisions.

Panelised Products

Our bespoke, modular Multi-Link-Panel NF is an incredibly quick-to-fit solution for rooflights. Manufactured in-house using an aluminium frame that can be powder coated to suit, it can be glazed with solid or multiwall polycarbonate. These lightweight glazing panels conform to the HSE’s recommendation for Non-Fragile roofing products and will arrive on site ready for quick installation.

When fitted with multiwall polycarbonate these panels can be manufactured in lengths up to 7000mm. The maximum free-span of any Multi-Link-Panel is 4000mm, so a 7000mm long panel would need an intermediate purlin.

As well as our standard Multi-Link-Panel NF we also offer Multi-Link Thermal™ Panels. These have a thermal break within the aluminium frame and are ideal for enclosed areas that are not open to the weather as they offer an improved U value, helping to prevent heat loss from buildings.

Sheet & Bar Products

Where you are looking for a traditional two-part split bar we have a great range to choose from. Apart from the P600 System the following can be used to fit glass, as well as polycarbonate. They can accommodate a range of different spans when used to install multiwall polycarbonate:

Glazing BarSpanNote
P227 SystemSpans up to 1400mm 
P286 SystemSpans up to 1500mmSecret fix within the capping bar
P600 SystemSpans up to 3000mmSnap-fit PVCu capping bar
P280 SystemSpans up to 3200mm 
P287 SystemSpans up to 3200mmSecret fix within the capping bar
P288 SystemSpans up to 4000mm 

Glass Rooflights

Where glass rooflights are your preferred option we can offer you a wide selection of different types.

Polycarbonate Domes

We can supply a wide range of polycarbonate domes, available as single, double or triple glazed items, offered in a selection of different shapes and sizes, with or without upstands.

Help & Advice

If you have a project in mind or would like help or advice on any of our products or services, please either ring us on 01925 811311, email us at enquiries@twinfix.co.uk or get in touch via the enquiry form on our Contact Us page.

 

Related Downloads

FilenameFile TypeSizeUploaded
NARM Member Leaflet.pdf  NARM Member Leaflet.pdfPDF2.89 MB30/08/2016

Related FAQs

1. What thicknesses, sizes and colours are available in multiwall polycarbonate?
We can supply you from stock in 6mm, 10mm 16mm and 25mm thicknesses. Many different sheet sizes are available up to 7 metre x 2.1 metre, but not every thickness is available in every size so it is always best to check with our sales office. In 10mm, 16mm and 25mm we can supply clear, opal and bronze variants. We will also be launching 32mm in the very near future.
2. What is Venetian polycarbonate?
Lexan Thermoclear Venetian is a multiwall sheet which has been screenprinted with white stripes on the non-uv coated side. The white stripe should always be installed facing inwards, the other side, clearly identified as protected against UV, being installed facing outwards. The white stripes are primarily there for decoration but they also help in reducing glare and heat build up inside a room.
3. What is the minimum pitch for a polycarbonate roof?
Never install polycarbonate flat. Our standard glazing systems require a minimum pitch of 5° to ensure water can run off the roof and to eliminate ‘puddling’. Our Multi-Link-Panel modular system should be installed with a minimum 10° pitch. Contact us if you require clarification.
4. Can you walk on polycarbonate sheet?
Polycarbonate has been tested against UK wind and snow loads and we can supply you with recommended glazing centres for each thickness of polycarbonate. However you should never walk directly on polycarbonate sheet. A crawling board or similar should be placed across at least two structural supports of the roof. We can manufacture aluminium framed polycarbonate panels which have been tested for non-fragility to ACR(M)001:2014 – this does not mean you can walk on the polycarbonate but gives added resistance to accidental falls.
5. How do you clean polycarbonate sheet?
Gently wash the sheet with a solution of mild soap and lukewarm water, using a soft, grit free cloth or sponge to loosen any dirt or grime. Rinse over with clean water to remove any residue. NEVER use a proprietary glass cleaner.
6. What is the life span of multiwall polycarbonate sheet?
The manufacturers of multiwall polycarbonate sheet offer a ten year written limited warranty on the product which covers discolouration, loss of light transmission and loss of impact strength due to weathering. That does not mean that after 10 years the sheet will fail, we have installations that have been in situ longer than 10 years with no obvious detrimental affect either in appearance or performance.
7. How much light does multiwall polycarbonate let through?
Taking 16mm triplewall polycarbonate as an example, clear sheet has a light transmission of 74%, opal has 62% and bronze has 30%
8. What is the fire performance of polycarbonate?
Polycarbonate has good fire behaviour characteristics and receives high ratings in several major European fire performance tests including EN13501. Always check with the Twinfix sales office for current classification, at the time of writing most variants achieve a class1Y when tested against BS476 part 7 surface spread of flame.
9. How does UV affect polycarbonate?
Solar radiation has a particularly harmful effect upon materials that are not protected. Many variants of multiwall polycarbonate have a unique proprietary UV-protected surface on one or both sides, giving excellent resistance to outdoor weathering. This unique protection ensures long-term optical quality under intensive UV exposure.
10. Am I required by the Building Regulations to have a non-fragile roof?
The Building Regulations themselves do not refer to “non-fragility” in relation to roofing systems. However, they do require that any structure is designed in accordance with the CDM Regulations, (Construction Design & Management) and these Regulations require that all buildings should be designed to utilise the safest method of construction available. (i.e. if a non-fragile design is feasible, then it should be used.)