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Dormers with a roof slope of less than 9,5 degrees on a shingles roof
If you want to get more space and light into your house, then you can build up a dormer on your roof or add a winter garden to the outer wall of your house. Dormers avoid the potential valleys that will be created. Usually these solutions have very low sloped roofs. Sometimes these slopes are even less than 9,5 degrees, making them not suitable for standard roofing materials. Roof parts such as valleys, very flat curved parts or low slope inclinations might all be dangerous spots for driven rain and water, snow accumulation and ponding water.
To have all of these details 100% secure, IKO launched a unique solution: the installation of the “Thermo-adhesive system” in combination with IKO bitumen shingles (nailing not required).
In this blog post you will find out how to install IKO Shingles on dormers with a low roof slope.
Shed dormer with a low sloped roof >>>
Basic types of dormers
Your IKO solution for low slope dormers = IKO Shingles Thermo System
Roof Shingles can be installed on any shape of roofs with a minimum roof slope of 15°
(with Cambridge Xtreme 9,5° you can go to a minimum 9,5°).
What if you have a roof part or dormer which has a very low roof slope between 4° to 15°?
Does it mean you have to use a different roof material instead of shingles for that part of the roof?
Does it mean you need to choose 2 different roof materials for your house?
Absolutely not!!
With IKO Shingles Thermo System you overcome the technical challenges of the low slope dormer and
finish your dormer also with professional IKO Shingles.
Your complete roof covered with 1 esthetical solution and you can choose any favorite shingle from the complete professional IKO Shingles range.
Beneath, we will focus on low sloped wooden deck application with regards to dormers.
Reference project in Germany: IKO Cambridge Xpress, color 52 Dual Black
How to apply shingles on low slope dormers?
Red roof parts = low slope dormer parts
(before IKO Thermo System installation)
Wooden deck from OSB boards with tongue and grove joints:
It is very import to have a wooden deck that is extremely flat and dry.
The best way to achieve this flatness is to use OSB boards with tongue and grove joints. Under certain conditions, dry wooden planks can also be used but they must always be covered with thin OSB boards (6-8 mm).
With the low lumber moisture and tongue-groove edges we will eliminate movement of the structure to a minimum. The total recommended thickness of a wooden deck is 22 mm but always check the local building code.
Rounded arch dormer and installation steps for underlayment and roof shingles
Finished rounded arch dormer with IKO Cambridge Xtreme color 55 Riviera Red
