Ventilated subfloor
- Possibility of 40 mm ventilation ducts in the floor
- Can be combined with ventilated walls
- Drawings with calculated airflow
The Granab system is an excellent choice for renovations linked to moisture or mould damage. Our systems for this type of project are made of galvanised steel and are consistently made of non-organic material, which is necessary for this type of project. With easy height adjustment of the subfloor system, it’ll be adapted to your home while continuously ventilating the air in the space between the slab and floorboards. It is easy to install and has many positive advantages compared to subfloor systems made of organic material. Below you can see a video of how our solution works in practice.
The system can be fully customised according to the requirements of your premises
You decide:
- Overfloor construction
- Fan placement
- Type of air inlet, floor or wall grille
- Typ av inluftsdon, golvdon eller vägg-galler
- Air inlet placement
- Internal fan or facade fan
Galvanised steel girders
Galvanised steel has many advantages over organic materials when it comes to projects related to moisture or mould damage. Galvanised steel girders retain their dimensional stability and are not affected by moisture or temperature changes. In addition, it eliminates the risk of creaking or unwanted deformations that can be caused by drying out or moisture exposure of floor joists in organic materials, such as wood joists. As the Granab system is made of non-organic material throughout and is not affected by moisture, you can rest assured that it is a long-term solution that will live up to your expectations.
Installation of Granab ventilated subfloor
Ventilated subfloor
Granab in combination with mechanical ventilation allows you to effectively ventilate away any moisture and emissions from the floor.
Granab also offers a wall-mounted ventilation grille. It is a common solution for ventilated subfloors in schools.
The air is spread over the slab surface by means of perforated ducts placed on the slab.
The fans offered by Granab are approved by Byggvarubedömningen.
The air in the floor construction flows over the slab surface to a perforated duct connected to an exhaust fan.
Granab floor ventilation was installed here
Documentation
Installation instructions
Read and download our installation instructions and other catalogues.
Learn more
Type approval
Read and download the systems type approval from RISE, Swedish Research Institute.
Our systems
Environmental certification
Granab works actively to reduce environmental impact and has certifications that confirm our commitment to sustainability. All our subfloor systems have Environmentally Product Declarations (EPD).
