Roof lanterns and roof lights in Milton Keynes
Sheerline S1 roof lanterns
Key specifications
Sheerline S1 roof lantern
- U-value 1.0 W/m²K
- Glazing 28mm Activ Blue
- Max size 3.2m x 6m
- Ventilation SheerVent option
We supply and install Sheerline S1 aluminium roof lanterns across Milton Keynes. We check the roof opening, glass specification, ventilation and finish before the lantern is ordered.
- Opening measured and checked before order
- Glass options for heat, noise and safety
- Local installation with aftercare
Inside and outside
Check the lantern from both sides.
From inside, you see the opening and daylight. From outside, you see the frame, caps and roof finish. We specify both sides together.
Getting the specification right
Start with the room and roof opening.
We look at the opening size, where daylight will fall, the direction the room faces and the surrounding windows and doors. We then use that information to set the ventilation, frame colour and proportions, on top of the Activ Blue glass that comes as standard.
- 01. PositionSet the opening size and position around the room below and the roof structure above.
- 02. ComfortActiv Blue glass comes as standard. We set the ventilation to the direction the room faces and how you use it.
- 03. FinishConfirm the frame colour and sightlines before the lantern is ordered.
The S1 system
Slim outside. Insulated through the frame.
Sheerline S1 uses low-line external caps and aligned corner details to keep the outside profile slim. Inside the aluminium frame, Thermlock multi-chamber technology works with 28mm glazing to improve insulation.
- Low-line caps
- The rafter and hip caps sit close to the glazing to reduce the outside profile.
- Thermlock technology
- The multi-chamber construction reduces heat transfer through the frame.
- Checked before order
- We confirm the size, style, colour and glass after checking the roof and upstand.
S1 configurations
Compare all 13 roof lantern layouts.
S1 is available in square, 2-way and 3-way layouts up to 3.2 x 6m without tie bars. We will confirm which layouts suit the opening before you choose the frame colour.
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Square Style 1
Anthracite Grey
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2-way Style 2
Anthracite Grey
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2-way Style 3
Anthracite Grey
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2-way Style 4
Anthracite Grey
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2-way Style 5
Anthracite Grey
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Square Style 6
Jet Black
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2-way Style 7
Jet Black
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2-way Style 8
Jet Black
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2-way Style 9
Jet Black
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2-way Style 10
Pure White
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3-way Style 11
Pure White
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3-way Style 12
Pure White
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3-way Style 13
Pure White
Prefer a flatter roof profile?
Compare fixed and opening flat rooflights.
Flat rooflights use edge-to-edge glass without the pitched rafters of a lantern. The separate page covers fixed, opening, larger multi-pane and walk-on options.
View flat rooflightsFrom our case studies
Lanterns we have fitted, photographed on the day.
Sheerline roof lantern, Drayton Parslow
A large Sheerline S1 aluminium roof lantern with automated opening vents, flooding an extension with daylight.
Read case study
Roof lantern and heritage doors, Northampton
A Sheerline roof lantern paired with black steel-look heritage aluminium doors on a brick extension.
Read case studyRequest a quote
Send us the basic details.
Tell us where the lantern is going and what stage the project has reached. Photos and rough dimensions help, but they are not required. We will review the information and contact you to discuss the next step.
- New extension, existing roof opening or replacement lantern
- Rough dimensions and preferred frame colour if known
- Any concerns about heat, glare, ventilation or privacy
What Milton Keynes homeowners say
Real reviews from real installations. Every one is public, so you can go and check them yourself.
Stuart Matthew
7 months ago
Fenster have just completed a front door installation on my new property - fantastic job and strongly recommend! The online design tool is great, Perry back at HQ is brilliant as is his communication. Andy, who installed the door, is a top gent and professional. Will definitely be a returning customer.
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Joanna Hayes
3 months ago
Really happy with the service we received from Fensters Windows. Aaron and Shane turned up on time and were both really friendly. They explained any issues as they went along and talked us through the different options, which we really appreciated. They did a great job fitting our new back doors and cleaned up everything afterwards. We also paid exactly what we had originally been quoted, with no unexpected extra costs. Really pleased with our new doors and would definitely recommend Fensters Windows. Thank you Aaron and Shane!
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Digger
3 months ago
We have used Fensters for years on a variety of glazing work, and 2 door installations. They are competitively priced and responsive. They take great care over measuring and specifying the work, giving you a clear quote so you understand what you are getting (thanks Perry!). The fitters are all extremely competent and personable. We had to replace our front door for accessibility reasons, they gave us confidence that our requirements would be met, reproduced the intricate leaded and stained-glass pattern of our old door, and did a quality fitting job (thanks to Johnnie and Shane!). In summary they are our go-to suppliers for all replacement and repair work.
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Silvia Peraro
2 months ago
I had an excellent experience with Fenster Glazing from start to finish. Nick Perry and David managed the initial quote to installation process seamlessly, keeping communication clear, honest, and completely stress-free. When it came to the actual fitting, Zac and Shane did a fantastic job with the installation, working efficiently and leaving everything spotless. The professionalism from the entire team was top-notch, and the final result looks brilliant. I highly recommend them.
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Bernie Raffe
4 months ago
Great service from Fenster Glazing, very happy with our new bi-fold door, glass door and windows (with built-in blinds) There was an issue with the wrong spec of glass provided to them from their supplier, so they had to temporarily board up a door and a window, but this was put right within a few weeks. Recommended, thanks.
Read on Google Zak Jessup 12 Jun 2025Cannot recommend higher! Nick and Perry were really helpful in getting my windows sorted ASAP.
Read on Google Norman Cummings 10 Jun 2025The best service ever, great workmen, very high standard and in the finish, excellent eye to detail.
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