Here are the main steps to follow when installing vertical timber cladding:
1. Preparing the surface :
To "condition" the wood, remove the boards from their packaging 24 to 48 hours before laying. Sheltered storage on site, in a well-ventilated stack, clear of the ground and protected from splashes, is necessary.
2. Preparing the substrate: the secondary framework
The secondary framework is the support to which the cladding boards are fixed. It is an intermediate structure between the supporting structure and the cladding. The quality of the framing is essential to increase the lifespan of the cladding. Secondary framing is made up of cleats fixed to the structure of the building itself. These cleats, treated to CLASS 2, have very specific dimensions to guarantee the solidity of the structure and the effectiveness of the air space:
- Width greater than or equal to 30 mm
- Minimum thickness of 27 mm
They must be fixed with a minimum spacing of 40 cm and a maximum of 65 cm.
Please note that the layout of the cleats depends on the type of installation chosen:
- Horizontal installation: single vertical battens
- Vertical installation: double battens for better ventilation.
A rain screen should then be fitted. Remember, the primary function of cladding is not to be watertight. It is the rainscreen that makes the façade watertight. The rainscreen is a film that protects against rain and wind. Its use is compulsory (except for walls that are already watertight, such as concrete walls).
The rainscreen is fixed when the secondary framing and battens are installed.
3. Laying the cladding boards
The boards are fixed to the battens using stainless steel nails or screws.
- For boards of less than 125 mm (effective width), only one fixing is required (concealed fixing).
- For boards wider than 125 mm (effective width), two fixings are required (visible fixings).