Our Structural Glazing Options

Structural Glass Roofs | Glass Lean To Roof | Frameless Glass Rooflights | Sliding Rooflights

If you are in the process of choosing some improvements to your home or other buildings, rooflights by Natralight might be the perfect option. With more than 30 years of experience when it comes to structural glazing, we can create some truly stunning rooflights with practical features.

Lean to Glazing

What Rooflight Types Do You Supply?

Our range includes off the shelf options, as well as completely bespoke units. The main rooflight types we supply are:

Sliding rooflights – Our sliding rooflights feature a side opening mechanism for maximum ventilation as well as letting in natural light.

Frameless glass rooflights – Frameless glass rooflights use the latest in rooflight technology: glass to glass joints.

Glass lean to roof installations – Ideal for connecting different areas of your property in a glass link style, or for creating extra interior space.

Structural glass roof installations - An impressive option for buildings pf all kinds, creating a dramatic look internally and externally.

Do I Need Planning Permission for Rooflights?

Planning permission is not normally needed for rooflights or re-roofing your home as Permitted Development rules allow for roof alterations.

There are some limits and conditions, including no alteration should project more than 150mm from the existing roof plane or be higher than the highest part of your roof. For side-facing windows they require obscured glazing and any opening has to be 1.7m above the floor.

Some local authorities have different rules regarding Planning Permission on what is possible, with regards to rooflight installations. This is the reason why you should always consult your architect or an expert such as Natralight about this matter.

Is My Roof Suitable for Rooflights?

Our rooflights can be installed in all kinds of roofs, but some are better suited to certain roof types than others. The best way to know whether sliding rooflights, frameless glass rooflights, or structural glass roof and structural glass roof installations are going to be best for your property is to get in touch with us. Our experts are always more than happy to discuss your options and help come up with the perfect design.

Having an in house design team lets us match your rooflights to your building perfectly. Some of the roof types we regularly work with include:

Gabled or pitched roofs

Flat roofs and roof terraces


M-shaped roofs


Of course, there are more unusual roof types out there which are just perfect for rooflight installations. If your roof is one of these more unusual varieties, get in touch to discuss your requirements with us.

Are Rooflights Difficult to Keep Clean?

Glazing technology is rapidly becoming more high tech, and this has led to some fantastic developments in glass care. For example, special glass coatings can be added to your rooflights which keep dirt and grime at bay. This means you can enjoy a clear view for longer! As and when needed, the rooflights can be cleaned like any regular glazing. 

How do the Rooflights Operate?

While our fixed rooflights and walk on glass do not move when in situ, we offer a complete range of opening rooflights. An example would be our sliding rooflights; these feature glass panels which slide over one another to form an opening. We also design and manufacture hinged opening rooflights which open more like a traditional window.

 A choice of operating mechanisms adds the finishing touch to your new installation. Manual operation is a popular option whereby the rooflights need to be opened by hand. This is convenient for rooflights within easy reach, but for more difficult to access installations we offer the option of remote controlled opening. For the ultimate in rooflight convenience, however, you can opt for our top of the range automatically opening and closing rooflights complete with rain sensors. 

Do Your Rooflights Come with a Warranty? 

All our rooflights come with a minimum five year warranty for your peace of mind. We are also members of several organisations such as UKAS.

What are my U Values?

U values are a calculation that are created due to the loss of heat through any building element per square meter of surface for one-degree difference between the internal and external temperatures.  This calculation helps to determine the thermal performance of glazed structures.  

The U values are measured in watts per square meter per kelvin (W//(M²K)). Each degree difference in temperatures between the inside and outside of the window is transmitted every square meter depending on what watts per square meter it's measured at. 

What does UW Values represent?

UW values are a calculation of heat loss through glass, edges and the frame.

Do I need a heating element near the rooflight?

Natralight would recommend a heating element is placed underneath the skylight, in order to minimise condensation on the pane.

What is the minimum distance needed between two rooflights?

If you have chosen to have individual roof lights, we would recommend putting two tiles in between, with an approximate distance of between 40-60cm.

Is a glass rooflight better than a plastic rooflight? 

Rooflights from Natralight are superior to plastic in every respect, offering better energy efficiency and durability. Glass skylights also reduce external noises, won't discolour, allow drafts or leak.

Why do rooflights have a black band around the perimeter?

The 115mm silkscreen band around the perimeter rooflights is for the UV protection of the sealing and upstand.

Do I need planning permission for my skylight?

In England and Wales planning isn't usually required to have rooflights installed, subject to the current limits and conditions by the government's Planning Portal under Schedule 2, Article 3, part 1, class C permitted development.

Is scaffolding needed to install or replace a rooflight?

This depends on the location of your rooflight. If you are unsure we recommend having one of our engineers attend your property to complete a site inspection. 

Glass Balustrades

Do glass balustrades meet Building Regulations?

Most systems comply with current Building Regulations, but if you are unsure of specific requirements we would recommend checking with a building inspector.

What is a frameless glass balustrade?

A balustrade manufactured from a quality toughened safety glass with metal fixtures and fittings that are attached to a metal handrail. 

Are frameless balustrades suitable for homes?

Yes, Natralight has rich experience working on many residential properties, flat roofs and as replacements for ageing wooden stair bannisters and rails which create a visual barrier and a decorative outside patio. Balustrades can also be used where internal levels change plus stairwells. 

Frameless glass balustrades are ideal for homes plus bars, shops, restaurants and offices. 

What is the best height for glass balustrades?

Building regulations state balustrades should be 900mm high on stairs and 1100mm everywhere else.

What is a structural glass balustrade?

A structural glass balustrade is based on two engineering principles; a strong base that clamps thick and strong glass panels and resists the bending moments and loads imposed on it. 

BS6180 was revised in 2011, and not it is possible to choose if you do or do not want a handrail. The handrail or top section which is placed on the glass is meant to tie glasses together at the top, making the whole structure sturdier and more solid. 

It must also be able to withstand the required load if one of the glass panels breaks across the gap created. If you choose not to have a handrail, laminated glass needs to be used plus glass that can have one side break with the other side still capable of withstanding the loads.

What's the difference between laminated and toughened glass?

Laminated glass is the windscreen of a car, whereas toughened glass is on the side and rear windows. Toughened glass is up to five times stronger than regular glass, which means it is more resistant to force before breaking. Toughened glass, when broken, becomes thousands of small pieces of glass that is considerably less dangerous than glass shards. 

Laminated glass is ordinary glass but is two panes that are sandwiched over a plastic inner layer and if the glass breaks the plastic layer holds it together with no glass shards and the whole piece remains together even though it's broken. 

Roof Lanterns 

Do roof lanterns apply to any home design?

Every property is different, which is why Natralight offers bespoke rooflight designs with different sizes, light transmissions, ventilation options and shapes.

What size roof lantern is best for my home?

Every property is different, as this will depend on how the area below is used, personal preference plus the amount of natural light you want to generate. 

Remember that the upstand/kerb that your roof lantern sits on needs to leave sufficient clearance all round for general maintenance of the roof itself. Typically 300mm minimum clearance is needed although you might get away with slightly less.

Structural Glass

What is structural glass?

Structural glass refers to any glazing that is taking on the bearing of the structural load. This type of glazing can be used for different projects such as glass floors, balustrades and facades.
Glass facades are commonly used for extensions as the glass is thick and strong enough to go without a framing system. Instead, it is kept in place by hidden channels and steel angles, which are made especially for your home and give you uninterrupted views of your surroundings. 

Is structural glass energy efficient?

Structural glass does not require a frame, meaning it can be as thick as you like and perfect for insulation. It is also thermally efficient, meaning you do not need to measure its U-values, unlike other types of glazing. 

Fire-Rated Rooflights

Is the fire-resistant glass suitable for external applications?

All non-insulating glazing is suitable for both internal and external locations.

What size of frame is required for fire-rated glazing?
The size of the frame will differ considerably from one product to another; with no standard formula. Consideration must be given to whether insulating or non-insulating glazing is required. 

Are skylights suitable for use in conservation areas?

Yes, it is common for us to design and manufacture flat roof skylights for this type of application. This type of roof is low lying and installed on a 5° pitch which allows water to run off. 

What Should I Do if there is condensation on the inside of my pane?

Firstly, ensure your room is adequately ventilated and be aware that condensation on the inside of the pane comes from not having a heat source underneath the roof window. The interior lining should also be horizontal over the rooflight and vertical under the rooflight, ensuring an optimum flow of air and maximum light.

How Can I Get a Quote on Your Rooflights?

You can get a quote on our rooflights, discuss your requirements, or get some more general information by giving us a call, or filling in the form on our ‘Contact Us’ page. We are always on hand to offer you any help, advice and information you may need when it comes to our rooflights and structural glazing.