A well-placed skylight brings light, air, and life into any roof. Whether for the attic, a converted studio, or simply as an additional light source – installing skylights is easier than ever. With the right tools, clear instructions, and a reliable partner, the project will be a success.
Why roof windows? Advantages at a glance
Skylights are much more than just a practical building element. They offer:
- More daylight:Natural light increases well-being.
- Better ventilation:Ideal for humid indoor climates.
- Increased value:Properties with well-thought-out lighting are more attractive.
- Aesthetics:Modern skylights add style to rooms.
Especially in regions such as North Rhine-Westphalia, Rhineland-Palatinate and Hesse, where many houses have partial roofs, roof windows are now part of the standard modernization.
Step by step: This is the easiest way to install
1. Planning and selecting the right roof window
First, you should determine the right size and type of roof window. Whether it's a pivot window, top-hung window, or an electrically operated model, brands like Velux offer a variety of high-quality solutions.The choice depends on:
- Roof pitch
- Room height
- planned use
- Thermal insulation value
2. Take safety precautions
Before the old roof is opened, #safetycomesfirst
- Suitable fall protection
- Protective gloves and hard hat
- Roof inspection only in dry weather
3. The right tool – your best helpers
For professional and time-saving installation, you will definitely need professional equipment– you should definitely have these tools:
✅ Sealing adhesive
An indispensable tool for sealingwindow joints.Whether underlayment or vapor barrier – a high-quality sealing adhesivereliably prevents drafts and moisture ingress.
✅ Insulation knife
Precise cutting of insulation material is crucial.A sharp insulation knifemakes this a breeze and clean job – ideal for a precise fit around the window.
✅ Spirit level
To ensure the window sits precisely and avoids tension later on, a spirit level isyour best friend. Even small deviations can lead to problems in the long run.
✅ Velux lifting device for roof windows
Anyone who's ever tried to hoist a skylight onto the roof alone knows: it's almost impossible without assistance. With the Velux lifting device, transporting and installing the window becomes child's play – even with larger models.
🛒 All of the tools and materialsmentionedare conveniently available in the online shop of Dach PRO– the reliable partner for roofing trades.
4. Prepare the window opening
- Carefully remove roof tiles in the area of the planned window.
- Mark supporting rafters and, if necessary, rebuild with rafters.
- Cut and fold in the underlayment.
Important: Pay attention to exact measurements and plumb alignmentso that the window closes perfectly later.
5. Insert window frame
- Place the prepared frame into the opening.
- Align using the spirit level.
- Screw together and seal with sealing adhesive.
Tip from a professional:Check the frame several times – precision is especially important in older roofs with uneven rafters.
6. Insulation and internal connection
Now the insulation knife comesinto play:
- Apply the insulation layer evenly around the window.
- Install vapor barrier and inner lining professionally.
- Finally, assemble the inner frame.
This step is crucial for energy efficiency and the indoor climate.
Video: Roofer / How to install a Velux roof window? | How to install a Velux roof window?
7. Insert window sash
With the Velux lifting device,the window sash can be safely transported to the roof and precisely installed. This is where the true advantage of this tool becomes apparent: effortless, safe, and precise.
8. Reinsert the external connection and bricks
- Installing the flashing
- Cutting and fitting roof tiles
- Final inspection for leaks and function
Once this work is completed, the skylight is ready – for light, air and life!
Where can you get everything you need?
Shops like Dach PRO – the online roofing retailer. As an experienced specialist retailer, Dach PRO offers:
- ✔️ Huge selectionof branded products
- ✔️ Top toolssuch as insulation knives, sealing adhesive, spirit levels and lifting devices
- ✔️ Fast deliverydirectly to your construction site
- ✔️ Excellent customer servicewith expert advice
Installing roof windows – a systematic approach to success
Installing a roof window yourself is not rocket science – with the right preparation, high-quality materials and professional tools such as sealing adhesive, insulation gauge, spirit level and Velux lifting device,installation is not only easier but also more efficient and safer.
