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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
Metal flashings is important:
If you have a simple shed roof with rakes on the sides, then start with the drip-edge metal flashing at the eave first.
To protect the sides on curved dormers, eyebrow dormers or arched dormers, special custom bended metal flashings should be used on these edges. Metal flashings must be nailed to the wooden deck. If flashings have a water stopper, fix them with metal clips and don’t penetrate these flashings with nails.
Shingles are applied by torch-on method without nails:
Many special dormers, covered terraces or winter gardens which are connected to the main house have such a low slope that shingles cannot be applied with standard application methods. Usually these slopes are somewhere between 4°- 9,5° degrees.
With the new IKO Shingles Thermo System all types of IKO shingles can be applied over these special low roof parts. The shingles are applied by torch-on method without nails. It means that the roofing layer is not penetrated with holes by roofing nails and that the surface is 100% waterproof. Let’s go over the installation of this Thermo System step by step.
Install the Armourbase Thermo AD horizontally:
Then continue with the Armourbase Thermo AD membrane and the horizontal application on slopes between 4°- 9,5° degrees.
Armourbase Thermo AD is a thermo-adhesive and heat activated waterproofing membrane. On the back side of each roll is a release foil which must be peeled off during the application. To work more efficiently, it’s helpful if two people are involved during the installation. It is not necessary to fix this membrane on overlaps as we did for steeper concrete decks (slope > 15°), because the slope is less than 9,5°.