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Walk On Glass and Rooflights For Flat Roofs and Basement Conversions

Our stunning walk on glass rooflights are designed for flat installation and can also be sunk into a patio or decking area to create a flush fit walk-on-glass design for basement conversions.

We manufacture the rooflight in our factory with a high specification 33mm toughened and laminated external glass pane that finishes square to the edge with a total height including structural kerb of 138mm.

The specialist walk on glass is sometimes specified by architects where the rooflight is required to be sunk into a floor so that it can be walked on to create a dramatic visual effect, letting natural light into cellars below or exposing features within a building such as workings, water or archaeology.

Our walk on rooflight is triple glazed as standard and features an extruded aluminium kerb, thermally broken with two 20mm polyamide insulating sections to create a triple cavity design. This product is factory glazed with super low E insulating argon filled triple glazed units manufactured in house to BS EN1279 Parts 2 & 3.

The intermediate glass can be supplied in subtle blue tint for glare reduction and also in sand blasted for obscure privacy. Blocking out up to 99% of damaging UV radiation that bleaches furniture and fabrics, these rooflights are triple glazed as standard with a product U-value of 0.6w/m2k.

Walk On Glass and Rooflights For Flat Roofs and Basement Conversions - More Details

  • Minimal aluminium frame design marine grade powder coated
  • Black resin boarder on glass gives a clean contemporary look
  • Triple cavity, thermally broken and insulated kerb
  • Built in structural up-stand not just a frame!
  • Triple glazed as standard U value = 0.6 w/m2k
  • 20 Year unit seal warranty using Super Spacer
  • 99% UV blocking safety glass as standard
  • Bespoke manufactured to your exact sizes
  • 15-20 day lead time on this specialist product

walk on glass technical drawing

Walk On Glass and Rooflights For Flat Roofs and Basement Conversions Example Pricing & Options

Walk On Glass and Rooflights For Flat Roofs and Basement Conversions FAQ's

What Size Should I Measure?

We only work off INTERNAL hole sizes, so please make sure you measure the size of the hole. This can be including finish plasterboard if you want to leave the black aluminium frame of the skylight showing, if you do not then simply give us the size of the hole before the plastering. Our skylights are designed using a 70mm wide aluminium kerb detail profile which can sit on a minimum of 70mm wide upstand.

How Do I Get A Price?

As we bespoke manufacture all Slimline and Pyramid sizes you can choose any size you require. Our fixed flat and opening skylights are also available in ex-stock sizes for rapid delivery.

Please contact us or get a quick quote here.

Do You Offer Trade Discounts?

As a rule no, we firmly believe that in this ONLINE age that we live in customers are free to choose and specify their own products based on design, performance and price. Installers make their money fitting our products or by including our products within a total project cost. We will however discount volume or multiple orders for larger projects and if the project is a new build or listed building zero rate the invoice.

What Are Your Payment Terms

Our payment terms for normal orders are strictly proforma using Visa or Mastercard (this not only insures the product and your risk but also gives you up to 60 days free credit dependant on which card you have) or Bank Transfer, or online via Google checkout or Paypal services. For larger orders or for orders that are not required for immediate delivery we offer a 50% deposit option with the balance being due just prior to delivery or collection.

When Can I Expect Delivery?

Our product range is usually delivered and installed within 3-4 weeks, this can be improved upon by a few days if your sizes fall into our standard sizes that are mass stocked, so we can offer a faster delivery time.

Do You Install Skylights?

Yes only for the Slimline and Pyramid products which are delivered in one piece as a factory bonded and glazed weatherproof unit. You lift this up onto the roof and fix to your ready prepared timber kerb. Please make sure you have good access in order to get the product up onto your flat roof.

Are The Roof Pitches forThe Pyramid And Slimline Fixed?

Yes they are fixed at a 40?angle all round, this is the optimum pitch for the easy clean glass coating to work on the external surface of the glass. This is also the optimum angle for structural integrity preventing any snow loading and giving good water run off. This angle also gives the best aesthetics for this design of product giving the feel of improved volume from the inside. Choose the flat skylights for a low sightline option with minimal external height.

Are The Roof Lights Available In White

No we only manufacture the slim glazing cappings in black powder coated aluminium, this is because the silicone seals within double and triple glazed units is black, allowing the caps to blend harmoniously with the seals to give very neat lines for an architectural look. White roofs require a lot of maintenance to keep them looking clean with regular cleaning to prevent dirt and pollution building up and discolouring the white covers leaving them looking grubby.

What Is The Largest Size I Can Have

Currently the maximum size we can manufacture using the Slimline product is 4000mm x 1600mm. Very soon we will be able to offer the fixed flat rooflights as a modular product which joins together in modules of 2000mm x 1200mm to give sizes up to 10,000mm x 2000mm or 10,000mm x 1200mm.

Walk On Glass and Rooflights For Flat Roofs and Basement Conversions Energy Rating

Useful Information and Downloads


Excellent service

Review of Slimline Glazing & Aluminium Systems
Errie Claassens
4.5 out of 5

It was great working with Rasa and her team. Thank you for the excellent service!

Absolutely delighted

Review of Slimline Glazing & Aluminium Systems
Roger C
5 out of 5

Thank you for all your assistance getting our fabulous windows to us on the time scale you promised. We are absolutely delighted with the result, the installation team are a credit to your company.

Outstanding Product

Review of Slimline Glazing & Aluminium Systems
Helen M (Herts)
5 out of 5

Our sliding doors (S20) are simply outstanding. Everything, from the lock mechanism to the sliders (that "glide") and the anthracite finish is outstanding. We had a couple of issues delaying installation - but Joana in the office made sure the job was completed the very next day. HIGHLY recommended

Completely awesome SL20 doors & window

Review of Slimline Glazing & Aluminium Systems
5 out of 5

Thank you Slimline for our gorgeous doors and window.The whole team from Rasa and Scarlett to the 'A' team of Reimas and Ricardo fitting them were incredibly professional, polite and thoroughly helpful guys with a very focussed attention to detail. They've transformed our house. Highly recommend.

Really Good Service & very Pleased with the Product

Review of Slimline Glazing & Aluminium Systems
Mr. Murray
5 out of 5

We contacted Slimline after issues with the Supply of an alternative. What a difference. Really quick response, clear communication, didn't mind my thousand questions, delivered ahead of schedule, great customer service and most importantly they look absolutely fantastic. Would highly recommend.

The Sliding Doors and Glass Walls Are Perfect

Review of Slimline Glazing & Aluminium Systems
Christine, Cornwall
5 out of 5

Fantastic Slimline Doors. When the plans were drawn up for the ultra contempory glass extensions to our 200 year old stone house I had a vision of how it would look and I am not disappointed. The SL18 doors and glass walls are perfect, as was dealing with the company and the team who successfully fitted the glazing on some of the coldest days of the year.

It looks absolutely stunning

Review of Slimline Glazing & Aluminium Systems
Abilgail - Chiswick, W4
5 out of 5

Hi guys - thanks for doing a great job on installing the roof lantern.. ! It looks absolutely stunning! W4 CHISWICK

Such a Dedicated, Efficient and Friendly Team

Review of Slimline Glazing & Aluminium Systems
Christine & Neils - Cornwall
5 out of 5

Thank you Abigail & Bob for sending such a dedicated, efficient and friendly team to fit the doors, they were great.

Simply fabulous!

Review of Slimline Glazing & Aluminium Systems
Rosie Taylor
5 out of 5

From start to finish Bob was helpful, knowledgeable and most importantly always available. Our job turned out to be more complicated than we anticipated but Bob found a way to resolve the issues and most importantly, satisfy our Building Control officer! Thank you for a wonderful end product!

SL20 Otimma Sliding Doors

Review of Slimline Glazing & Aluminium Systems
5 out of 5

We had 12mts of SL20 Otimma sliding doors installed and they look stunning! Best system on the market. We are equally impressed with the aftersales support as when one of the doors needed adjusting due to small movement of the new house they came within a day. Special thanks to Tony and Bob.

Compliments to the Fitters

Review of Slimline Glazing & Aluminium Systems
Ian, Surrey
5 out of 5

Great start today. Windows looking good so far. Brilliant workmanship. Compliments to the fitters for looking after the house so well and working so hard in the soaring heat! I cant wait to see the finished article.

Sliding Patio Doors

Review of Slimline Glazing & Aluminium Systems
N.L Oxford
4.5 out of 5

Dear Tony, The guys have just left. They did a great job of the sliding doors in all respects; they look terrific and I am really pleased with it.

Slimline Sliding Doors

Review of Slimline Glazing & Aluminium Systems
Nigel, SE7
4.5 out of 5

The guys finished the installation of the slimline sliding doors. It is a great product; I am pleased. The installation team were very pleasant and competent, with a good focus on quality and attention to detail.

Doors, Lantern and Window

Review of Slimline Glazing & Aluminium Systems
4 out of 5

Fantastic product. Delivered on everything they said they would. Makes the room look amazing...would highly recommend.

Very Pleased with the Fast and Efficient Service

Review of Slimline Glazing & Aluminium Systems
Becky, Surbiton
5 out of 5

I just wanted to say that I am very pleased with the service so far. I put in a query on Tuesday evening, had a conversation with Joanna Wednesday morning, had support from the installation team yesterday (Thursday) afternoon and placed the order at 4pm. Thank you so much for a fast and efficient service so far.

Simply Brilliant

Review of Slimline Glazing & Aluminium Systems
Karen Gallagher, London
5 out of 5

Your guys came yesterday and did a brilliant job finishing off. They were also very polite and tidy. We would like to say a big thank you to you for all your help and support - and going the extra mile to give us an amazingly professional service. You have been quite simply brilliant and we really appreciate it.

An Absolute Pleasure to Have Working in My Home

Review of Slimline Glazing & Aluminium Systems
Nick Evans, lONDON
5 out of 5

The windows are absolutely beautiful - but we appreciate this is importantly down to expert installation - please pass on a big thank you to all the installation teams. Each and every one - who have been outstanding craftsmen, highly professional in their approach and an absolute pleasure to have working in my home. We feel very fortunate to have found Slimline after our loft company builders had let us down on the architects specification for the windows

Everything as promised and the doors look amazing

Review of Slimline Glazing & Aluminium Systems
Mr Taylor
5 out of 5

I contacted slimline for sliding doors for my home. Its not easy getting to see them but slimline had a 6m set of sliding doors in their showroom. An excellent product and eight weeks after survey as promised ...they are in. Well done to everyone at Slimline. Highly reccommended

The walk on glass is amazing!

Review of Slimline Glazing & Aluminium Systems
Flora - Islington
5 out of 5

Many thanks for the work that was carried out at the house. By the way, the walk on glass is amazing! The guys have done a very good job!

Very helpful and did a good job

Review of Slimline Glazing & Aluminium Systems
Colin North - London
5 out of 5

To confirm that our French doors/windows unit was successfully installed today and we are very pleased with it. Your installation team were very helpful and did a good job making a very neat installation and finishing off the frame edges abutting the wall. We look forward to the installation of the glass balcony.

One less headache

Review of Slimline Glazing & Aluminium Systems
5 out of 5

Undergoing a full reconstruction and extension of our flat has been quite an undertaking and Tony Hall has taken what could easily be another headache and made it as fluid as I could imagine. Always contactable, it's like having your own project manager! Highly recommended.

A Great Glazing Range from Contemporary to Traditional

Review of Slimline Glazing & Aluminium Systems
MTA Architecture & Design
5 out of 5

We have specified glazing from Slimline on a number of our projects (including a recent extension in Knightsbridge, London). They have a great range of elegant products from contemporary to traditional.

Excellent Customer Service

Review of Slimline Glazing & Aluminium Systems
Berkeley Homes (South East Londonl) Ltd
5 out of 5

Just a short note, to say Thank you very much for consideration and efforts on past week. You really pushed the boat out on our meeting in the factory on Saturday, to touch and compare the doors. It’s had the desired affect and we shall move on now with Slimline Aluminium throughout. Again, thank you for your excellent customer service.

Great people to deal with

Review of Slimline Glazing & Aluminium Systems
Phil Hodgson
5 out of 5

Recently had a walk on glass roof fitted. Don't usually do reviews Slimline gave a good price and Bob in sales was a pleasure to deal with and discussed in a very informed way. Surveyor Tony very helpful and went out of his way and fitters also professional. Felt confident in job - will use again.


Review of Slimline Glazing & Aluminium Systems
Rob sykes
5 out of 5

We had a side extension built by Slimline glazing. Dan, the builder, was great and the work force very professional. I have to say the doors made the finishing touches - they are great. Great job all round.

Walk on Glass

Review of Slimline Glazing & Aluminium Systems
Mr Moorecroft, NW6
5 out of 5

I had some walk on glass fitted yesterday, which covered a big area. Slimline fitted all the steel work for installation prior to the glass. The finishing was great and they matched the mastic to the patio slab so it all blends in and looks great. We're really pleased.

Glass Extension

Review of Slimline Glazing & Aluminium Systems
Sarah Holmes - SW6
4.5 out of 5

We had a glass extension installed last week and it is great. Everyone was so helpful and the installers worked really hard. Everyone has commented on how it looks. Thanks!!

They Look Great !!!

Review of Slimline Glazing & Aluminium Systems
Peter Cummings - NW1 London
4 out of 5

We had 2 sets of the slim sliding patio doors and some walk on glass fitted just before Christmas. It was touch and go if it was going to be done before the festive season, but slimline glazing did really well and got our build water tight in time. We're really happy with the product and service. Well done to all.

We're really pleased

Review of Slimline Glazing & Aluminium Systems
5 out of 5

Thanks to everyone at slimline for being so professional and polite. They were always willing to help. We had a big set of sliding doors, 2 roof lights and a large glass roof fitted. They have really finished the build off thanks again. Mrs D Ingles, Eastbourne

Last Weeks Glass Installation

Review of Slimline Glazing & Aluminium Systems
Neil Marks
5 out of 5

I just want to say how pleased we are last Thursday the final piece to our puzzle was installed we have a property in West London and we were having a big glass roof fitted we had no access through the house so each piece of glass had to be craned over the house it looks fantastic!!

So pleased with the results

Review of Slimline Glazing & Aluminium Systems
Steve & Jane Wilmslow
5 out of 5

We were recommended by a friend at work to get a quotation for the glazing as we were having a fairly large extension and the back of our house re-built and modernised. Everything was going great until our builder went bust and left us in a dilemma. Tony at the Slimline office helped us obtain a new builder and Slimline then took over the remainder of the construction works - installing their doors and windows. It took a little longer due to the hiccups we had but we are so pleased and grateful for the results.

Project in Battersea

Review of Slimline Glazing & Aluminium Systems
Greg Hastings
4.5 out of 5

I commissioned Slimline Aluminium to provide a glazing package for our project in Battersea. We had sliding doors, balustrades, an electric roof light, plus some additional windows and doors. Slimline worked well with our contractor and deliverd on time - great job!

Walk on Glass project

Review of Slimline Glazing & Aluminium Systems
Robin Walker. SW1
5 out of 5

I used Slimline for a Walk on Glass project in central London. The quality of the works is second to none and I was informed all the way through the project. I was very happy and so was my customer. I’ve since used slimline glazing on a project that involved a very complex structural glass extension. They provided all the right help from the glass and structural engineers and all drawings were designed correctly - which made the installation process a lot easier, really happy!!

3 panel sliding doors

Review of Slimline Glazing & Aluminium Systems
Mr Mikal - Ealing
4.5 out of 5

We had a 3 door set of Slimline's sliding doors installed at our property in Ealing 2 months ago. They are so easy to slide and the middle sections are so narrow. it’s great when the doors are shut as there are no thick frames that obstruct the view. We have recommended at least 3 people so far. I must say, our friends do not stop commenting on them.

Roof lanterns

Review of Slimline Glazing & Aluminium Systems
Café Italia
4.5 out of 5

Slimline Glazing installed a Slimline roof lantern for us at our restaurant when we had the refurb done, everyone one who walks in asks us were we got it from it really sets off the area were we had the work done it lets in so much light they weren’t the cheapest but the quality was second to none but everyone was so polite from start to finish and met all our requirements.

Thank you Slimline Glazing

Review of Slimline Glazing & Aluminium Systems
Jane - Surrey
4.5 out of 5

I've just had a new set of SL17 sliding doors installed by Tony and his team. What a great job. The doors have transformed my old gloomy kitchen into a bright space that's enjoyable to use again.

sl600 aluminium door

Review of Slimline Glazing & Aluminium Systems
P.T Manchester
4.5 out of 5

Although we initially wanted the sl17 doors (which are amazing but a little out of our price bracket), we opted for the sl600 in the end - which were still expensive but did fit in to our budget. We are so please with them. They're great modern door and really don't feel like a compromise. we would (and have) recommend Slimline and their doors to anyone.

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Slimline Glazing & Aluminium Systems.
Rated 5 out of 5 based on 37 user reviews.

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