Dormer window in Alkmaar
A dormer provides space and light on the upper floor and increases the value of your home. What matters most with a dormer is the connection to the existing roof, as this is where leaks will occur later if it is not done correctly. We install dormers and renovate existing ones, including the surrounding leadwork.
Installing or renovating a dormer in Alkmaar? We ensure a watertight connection to your roof.
- Waterproof connection to the existing roof
- Pre-permit check
- 12-year warranty
Why a dormer asks for roofing knowledge
A dormer is partly carpentry, but the part that leaks is roofing. The cheeks, the connection to the tiles, and the lead flashing along the sill determine whether it will still be dry in ten years. We regularly see dormers where the wood is neatly finished but the lead flashing is installed too short, and then water seeps through.
The existing roof structure is also involved. A hole is being made in your roof, so the rafters are interrupted and the weight must be redistributed. With older homes, we look at this first. A dormer that is too heavy for the structure underneath will cause cracks in the plasterwork within a few years.
3 steps to a dormer on your roof
View our working method
Step 01
Inspection and permit check
We inspect the structure and check what is permitted.
Step 02
Design and quotation
You choose the size and finish and get a fixed price.
Step 03
Installation and delivery
We install the dormer and waterproof the surrounding roof.
What are the benefits of a dormer
Choose space
A dormer is one of the few interventions that provides space, light, and value simultaneously.
Add a full-sized room
A sloping attic becomes a room where you can stand upright.
Much more daylight
Especially on a north-facing side, it makes the difference between usable space and storage space.
Higher home value
An extra usable room counts towards valuation and sale.
Insulation right away
We insulate the dormer according to current standards, which also makes the attic more comfortable.
Installed in one day
Prefab dormers are usually installed within a day, with minimal disruption.
Are you allowed to have a dormer?
We check the permit and the structure, free of charge and without obligation.
We work with premium brands
We work exclusively with proven quality brands, so that your roof lasts for years without any worries.
How much does a cost dormer in Alkmaar?
Clear pricing
The price depends on the width, the finish, the number of windows, and whether the structure needs to be modified. Accessibility also plays a role, as a dormer has to be brought onto the roof from somewhere. Therefore, we do not provide a guideline price over the phone. After the inspection, you will receive a fixed price in writing.
Do you have a permit necessary?
Good to know
At the rear of the house, a dormer is often permit-free, provided it stays within the dimensions and does not come too close to the roof edge. This generally does not apply at the front or in a protected cityscape. The rules vary by municipality and neighborhood, so we check your specific address before anything is ordered.
Everything about a dormer in Alkmaar
More questions? Contact us
Questions about a dormer in Alkmaar? You will find the answers below.
That depends on the location and the dimensions. Often not at the back, but usually at the front. We check your address with the municipality before anything is set in motion.
A prefabricated dormer is usually installed within a day. Preparation and the permit procedure take longer; expect several weeks to months if a permit is required.
Not always. The angle of inclination must be sufficient and the structure must support the extra weight. For older homes, we assess this first, because that is not something you want to discover afterwards.
Yes, and that is often more cost-effective than replacing. Usually, it involves the leadwork, the side cheeks and the frames. The structure itself is still fine.
Do you have a question that is not listed here?
Contact us or call us
What do our say customers
Google reviews
What comes up most often: that the cause is thoroughly investigated, that everything is explained calmly, and that the roof is left clean and tidy.
RatingPleasant and efficient roofer who immediately replaced the worn-out lead flashing at the chimney.
We had two skylights replaced with larger ones and renewed the gutters on that side at the same time. The team worked for three days, and the result is exactly what we had in mind. We already notice a difference in the amount of natural light, and the gutters slope perfectly.
Our skylight no longer closed properly and moisture was coming in when it rained. They repaired it expertly and immediately replaced the seal all around.
Are you considering a dormer?
Request a free inspection. We assess the structure, check the permit, and you will then receive a fixed price with a clear breakdown.
- Free inspection
- Permit check
- Waterproof connection
- 12-year warranty
