Roof windows
More light under the roof.
We install roof windows in new and existing roofs – with watertight flashings, and with sun protection and roller shutters on request.
Service
Living space that breathes
Roof windows bring daylight and fresh air into the attic and open up the view outside. Different models allow the right choice for every room.
We work with well-known manufacturers such as Velux and Roto. Modern roof windows offer thermal and sound insulation to current standards and turn the attic into a comfortable living space.
What we do
Installation in new builds
Roof windows matched to room, roof pitch and covering.
Retrofit & replacement
New windows in existing roofs or replacement of old models.
Sun protection & shutters
Blinds, awnings and roller shutters – inside and outside.
Watertight flashings
Flashing kits for tiles, metal roof tiles or sheet metal.
Process
How we work
- Site visitWe look at the roof and take measurements.
- QuoteMaterials, schedule and price – clear and in writing.
- ExecutionOur own team works cleanly and on time.
- HandoverJoint inspection, site left clean.
Why ISO TRAPEZ
Roof windows. Done right.
- More daylightLess artificial light, and passive solar warmth in winter.
- Better insulationModern glazing for a pleasant indoor climate.
- Quieter livingGood sound insulation, even in rain and wind.
Projects
From our building sites
FAQ
Frequently asked questions
Which size fits?
It depends on rafter spacing, roof pitch and the room – we measure on site.
Can a window be added later?
Yes, also in existing roofs.
Which brands do you offer?
We work with brand manufacturers such as Velux and Roto; other models on request.
More services
Roof renovation
We renew roofs that have seen better days – with metal roof tiles or trapezoidal sheets, and new gutters and roof windows on request.
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Roof accessories
Gutter accessories, rooflights, roof windows, sun protection and everything that belongs to a clean roof covering – from one source.
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Roof carpentry
Roof structures, timber work and repairs to rafters and beams – for new builds, conversions and renovations.
Details →Contact
Let's talk about your project.
Tell us briefly what it is about. After a site visit you receive a clear quote in writing.