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INSTALLATION RECOMMENDATIONS FOR TERRACE COVERINGS
When installing a terrace, there are several things to consider. We provide you with tips and information on topics such as installation, waterlogging, fastening, material properties, "invisible" fastening, "visible" fastening, as well as substructure for terrace boards.
MOUNTING MATERIAL & FASTENING MATERIAL:
"Invisible Fastening"
SIHGA SenoFix (for Thermowoods)
- Terrace board is not damaged on any visible surface
- extremely fast and easy installation
- provides perfect constructive wood protection - increases the lifespan of the terrace
Seno Fix
Easy, invisible fastening using mounting clamps
SIHGA DielenFix
- the visually perfect solution for terrace boards
- fastening with screws that are not visible
- suitable for almost all types of wood
- ventilated terrace system between padding wood & board (6 mm spacing)
- boards can be replaced individually afterwards
- (from 8 mm gap width)
- variable visible gap (0 to 15 mm)
Dielen Fix
Screwed on the backside using BohrFix
TENI Clip (for Thermowood)
- easy and fast installation without the need for clamps
- the visually perfect solution for terraces
- fastening with screws that are not visible
- provides perfect structural wood protection
- automatically ventilated terrace system due to spacing between padding wood & board (8 mm distance)
TENI Clip
Place the Teni Clip in the groove. Insert the screw at an angle of about 65° and tighten it until a gap of 6 mm is achieved.
Visible Fastening
SIHGA TerrassenFix II TF
- to significantly extend the lifespan of terraces
- facilitates installation
- quick adjustment of gap width from 6 to 9 mm using spacer bolts
- prevents waterlogging
- ventilated terrace system with 5 mm spacing between padding wood and board
- enhances the elasticity of screws subjected to shear stress
place TerrassenFix
Align the following terrace board flush
Insert spacer bolts, screw in terrace board
Remove spacer bolts
After screwing is done, remove spacer bolts
Substructure
SIHGA SymbioFix
Aluminum strip protects substructure as well as terrace board, ensuring no contact between the board and substructure.
SymbioFix
Aluminum strip protects substructure as well as terrace board, ensuring no contact between the board and substructure.
Every terrace board is only as good as its fastening (installation)!
Before installing the terrace decking, it is recommended to inspect the delivered material. In particular, reference is made to the applicable EN 15146, Annex A: "All profiles should definitely be inspected before installation, with the earlier date applying." In spring and summer, after a prolonged period of fair weather, the wood moisture can drop below 10%, and in winter, it can rise up to 25% (fiber saturation) in the terrace boards. Therefore, during installation, a wood moisture content of approximately 16 +/- 2% should be maintained.
Installation
For the recommended board width of 90 to 120 mm, a gap of at least 7 mm should be maintained during installation (Recommendation: gaps of at least 6% of the board width) (Fig. 2). The substructure of the terrace decking and the fastening to the substrate must be dimensioned and executed strongly enough to withstand the distortion caused by the swelling and shrinking of the terrace boards. Slats or even strips cannot provide sufficient resistance to deformation forces. Suitable substructures include wood species with enhanced natural durability (e.g., larch, thermally modified wood, tropical wood, aluminum profiles). Under the terrace decking, the support timber may be a maximum of 50 mm wide (Fig. 1). For greater width, a gap of at least 7 mm through underlay material should be maintained between the decking and the substructure (Fig. 1.1). Other options include aluminum profiles, plastic pads, etc. The spacing between substructure timbers depends on the board thickness and should be a maximum of 40 cm (Recommendation: 20 times the board thickness). These relatively short support spacings ensure that the swelling and shrinking-related warping or twisting of individual boards remains within limits and that the terrace decking remains even and trip-free. Projections should be at least 50 mm but no more than 100 mm (board end to the first fastening on the substructure) (Fig. 3).
Ventilation
There are various terrace constructions. The appropriate substructure must ensure that moisture beneath the terrace decking and the substructure is quickly drained (e.g., through a slight incline of the substructure by 2%). Sufficient ventilation is required beneath the terrace decking and also along the sides near wall boundaries to ensure rapid wood drying. Causes of waterlogging on the terrace decking can include sun umbrella stands, flower pots, etc. directly on the ground (Fig. 2) (Fig. 2.2).
Installation
For the recommended board width of 90 to 120 mm, a gap of at least 7 mm should be maintained during installation (Recommendation: gaps of at least 6% of the board width) (Fig. 2). The substructure of the terrace decking and the fastening to the substrate must be dimensioned and executed strongly enough to withstand the distortion caused by the swelling and shrinking of the terrace boards. Slats or even strips cannot provide sufficient resistance to deformation forces. Suitable substructures include wood species with enhanced natural durability (e.g., larch, thermally modified wood, tropical wood, aluminum profiles). Under the terrace decking, the support timber may be a maximum of 50 mm wide (Fig. 1). For greater width, a gap of at least 7 mm through underlay material should be maintained between the decking and the substructure (Fig. 1.1). Other options include aluminum profiles, plastic pads, etc. The spacing between substructure timbers depends on the board thickness and should be a maximum of 40 cm (Recommendation: 20 times the board thickness). These relatively short support spacings ensure that the swelling and shrinking-related warping or twisting of individual boards remains within limits and that the terrace decking remains even and trip-free. Projections should be at least 50 mm but no more than 100 mm (board end to the first fastening on the substructure) (Fig. 3).
Ventilation
There are various terrace constructions. The appropriate substructure must ensure that moisture beneath the terrace decking and the substructure is quickly drained (e.g., through a slight incline of the substructure by 2%). Sufficient ventilation is required beneath the terrace decking and also along the sides near wall boundaries to ensure rapid wood drying. Causes of waterlogging on the terrace decking can include sun umbrella stands, flower pots, etc. directly on the ground (Fig. 2) (Fig. 2.2).
Fastening:
Each terrace board should be fastened from above with at least two screws on each substructure timber. Pre-drilling (slightly larger than the shaft diameter) and countersinking (even for screws with drill points) is generally recommended to prevent splitting and cracking. When using a spacer, the screws should be arranged diagonally. The screw head must be flush with the surface. The edge distance of each screw should be at least 15 mm. There must be a minimum distance of 50 mm or a maximum distance of 100 mm from the board end (end grain) to the fastening (Fig. 2.1). For each board joint, two slats with spacing should be arranged (Fig. 3). The joint should never be aligned with a support slat (Fig. 3.1) (Fig. 3.2).
During production, care is taken to ensure that at least one wide side (= visible side) meets all sorting criteria. When installing, it is important to place the nicer side facing up, regardless of whether it's the right (marked side) or left (unmarked side).
Material Characteristics:
There are several wood species from which dark substances can be washed out over time due to weathering. Dirt can also be released and washed off from the surface of the terrace boards. To avoid soiling of the façade under balconies, terraces above garages, etc., regulated drainage should be provided (e.g., rain gutter, balcony drain, downspout, etc.).
Wood-Specific Features:
Color variations within a wood species
Each terrace board should be fastened from above with at least two screws on each substructure timber. Pre-drilling (slightly larger than the shaft diameter) and countersinking (even for screws with drill points) is generally recommended to prevent splitting and cracking. When using a spacer, the screws should be arranged diagonally. The screw head must be flush with the surface. The edge distance of each screw should be at least 15 mm. There must be a minimum distance of 50 mm or a maximum distance of 100 mm from the board end (end grain) to the fastening (Fig. 2.1). For each board joint, two slats with spacing should be arranged (Fig. 3). The joint should never be aligned with a support slat (Fig. 3.1) (Fig. 3.2).
During production, care is taken to ensure that at least one wide side (= visible side) meets all sorting criteria. When installing, it is important to place the nicer side facing up, regardless of whether it's the right (marked side) or left (unmarked side).
Material Characteristics:
There are several wood species from which dark substances can be washed out over time due to weathering. Dirt can also be released and washed off from the surface of the terrace boards. To avoid soiling of the façade under balconies, terraces above garages, etc., regulated drainage should be provided (e.g., rain gutter, balcony drain, downspout, etc.).
Wood-Specific Features:
Color variations within a wood species
- Natural greying of the wood surface due to weathering
- Cracks and fissures on the surface and at the board ends caused by the swelling and shrinking behavior of the wood
- Tendency of the board to cup or warp
- Resin pockets / resin exudation
- Rough spots in the area of knots and irregular growth
- When the surface is wet, there is a risk of slipping, similar to other materials.
Abb. 1
Abb. 1.1
Abb. 2
Abb. 2.1
Abb. 2.2
Abb. 3.1
Abb. 3.2
The development of this installation recommendation was done in coordination with Holzforschung Austria (www.holzforschung.at). Reference: 1.) Balconies and Terrace Coverings Made of Wood, Holzforschung Austria, 2nd Edition 2008 / 2.) EN 15146 (Issue 01.03.2007): Interior and Exterior Claddings Made of Solid Softwood - Profiled Boards without Tongue and Groove.
Installation Recommendations for Terrace Coverings
When installing a terrace, there are several things to consider. We provide you with tips and information on topics such as installation, waterlogging, fastening, material properties, "invisible" fastening, "visible" fastening, as well as substructure for terrace boards.
MOUNTING MATERIAL & FASTENING MATERIAL:
"Invisible Fastening"
SIHGA SenoFix (for Thermowoods)
- Terrace board is not damaged on any visible surface
- extremely fast and easy installation
- provides perfect constructive wood protection - increases the lifespan of the terrace
Easy, invisible fastening using mounting clamps
SIHGA DielenFix
- the visually perfect solution for terrace boards
- fastening with screws that are not visible
- suitable for almost all types of wood
- ventilated terrace system between padding wood & board (6 mm spacing)
- boards can be replaced individually afterwards
- (from 8 mm gap width)
- variable visible gap (0 to 15 mm)
Dielen Fix
Screwed on the backside using BohrFix
TENI Clip (for Thermowood)
- easy and fast installation without the need for clamps
- the visually perfect solution for terraces
- fastening with screws that are not visible
- provides perfect structural wood protection
- automatically ventilated terrace system due to spacing between padding wood & board (8 mm distance)
TENI Clip
Place the Teni Clip in the groove. Insert the screw at an angle of about 65° and tighten it until a gap of 6 mm is achieved.
Visible Fastening
SIHGA TerrassenFix II TF
- to significantly extend the lifespan of terraces
- facilitates installation
- quick adjustment of gap width from 6 to 9 mm using spacer bolts
- prevents waterlogging
- ventilated terrace system with 5 mm spacing between padding wood and board
- enhances the elasticity of screws subjected to shear stress
Insert spacer bolts, screw in terrace board
Remove spacer bolts
Remove spacer bolts
After screwing is done, remove spacer bolts
Substructure
SIHGA SymbioFix
Aluminum strip protects substructure as well as terrace board, ensuring no contact between the board and substructure.
Aluminum strip protects substructure as well as terrace board, ensuring no contact between the board and substructure.
Every terrace board is only as good as its fastening (installation)!
Before installing the terrace decking, it is recommended to inspect the delivered material. In particular, reference is made to the applicable EN 15146, Annex A: "All profiles should definitely be inspected before installation, with the earlier date applying." In spring and summer, after a prolonged period of fair weather, the wood moisture can drop below 10%, and in winter, it can rise up to 25% (fiber saturation) in the terrace boards. Therefore, during installation, a wood moisture content of approximately 16 +/- 2% should be maintained.
Installation
For the recommended board width of 90 to 120 mm, a gap of at least 7 mm should be maintained during installation (Recommendation: gaps of at least 6% of the board width) (Fig. 2). The substructure of the terrace decking and the fastening to the substrate must be dimensioned and executed strongly enough to withstand the distortion caused by the swelling and shrinking of the terrace boards. Slats or even strips cannot provide sufficient resistance to deformation forces. Suitable substructures include wood species with enhanced natural durability (e.g., larch, thermally modified wood, tropical wood, aluminum profiles). Under the terrace decking, the support timber may be a maximum of 50 mm wide (Fig. 1). For greater width, a gap of at least 7 mm through underlay material should be maintained between the decking and the substructure (Fig. 1.1). Other options include aluminum profiles, plastic pads, etc. The spacing between substructure timbers depends on the board thickness and should be a maximum of 40 cm (Recommendation: 20 times the board thickness). These relatively short support spacings ensure that the swelling and shrinking-related warping or twisting of individual boards remains within limits and that the terrace decking remains even and trip-free. Projections should be at least 50 mm but no more than 100 mm (board end to the first fastening on the substructure) (Fig. 3).
Ventilation
There are various terrace constructions. The appropriate substructure must ensure that moisture beneath the terrace decking and the substructure is quickly drained (e.g., through a slight incline of the substructure by 2%). Sufficient ventilation is required beneath the terrace decking and also along the sides near wall boundaries to ensure rapid wood drying. Causes of waterlogging on the terrace decking can include sun umbrella stands, flower pots, etc. directly on the ground (Fig. 2) (Fig. 2.2).
Installation
For the recommended board width of 90 to 120 mm, a gap of at least 7 mm should be maintained during installation (Recommendation: gaps of at least 6% of the board width) (Fig. 2). The substructure of the terrace decking and the fastening to the substrate must be dimensioned and executed strongly enough to withstand the distortion caused by the swelling and shrinking of the terrace boards. Slats or even strips cannot provide sufficient resistance to deformation forces. Suitable substructures include wood species with enhanced natural durability (e.g., larch, thermally modified wood, tropical wood, aluminum profiles). Under the terrace decking, the support timber may be a maximum of 50 mm wide (Fig. 1). For greater width, a gap of at least 7 mm through underlay material should be maintained between the decking and the substructure (Fig. 1.1). Other options include aluminum profiles, plastic pads, etc. The spacing between substructure timbers depends on the board thickness and should be a maximum of 40 cm (Recommendation: 20 times the board thickness). These relatively short support spacings ensure that the swelling and shrinking-related warping or twisting of individual boards remains within limits and that the terrace decking remains even and trip-free. Projections should be at least 50 mm but no more than 100 mm (board end to the first fastening on the substructure) (Fig. 3).
Ventilation
There are various terrace constructions. The appropriate substructure must ensure that moisture beneath the terrace decking and the substructure is quickly drained (e.g., through a slight incline of the substructure by 2%). Sufficient ventilation is required beneath the terrace decking and also along the sides near wall boundaries to ensure rapid wood drying. Causes of waterlogging on the terrace decking can include sun umbrella stands, flower pots, etc. directly on the ground (Fig. 2) (Fig. 2.2).
Fastening:
Each terrace board should be fastened from above with at least two screws on each substructure timber. Pre-drilling (slightly larger than the shaft diameter) and countersinking (even for screws with drill points) is generally recommended to prevent splitting and cracking. When using a spacer, the screws should be arranged diagonally. The screw head must be flush with the surface. The edge distance of each screw should be at least 15 mm. There must be a minimum distance of 50 mm or a maximum distance of 100 mm from the board end (end grain) to the fastening (Fig. 2.1). For each board joint, two slats with spacing should be arranged (Fig. 3). The joint should never be aligned with a support slat (Fig. 3.1) (Fig. 3.2).
During production, care is taken to ensure that at least one wide side (= visible side) meets all sorting criteria. When installing, it is important to place the nicer side facing up, regardless of whether it's the right (marked side) or left (unmarked side).
Material Characteristics:
There are several wood species from which dark substances can be washed out over time due to weathering. Dirt can also be released and washed off from the surface of the terrace boards. To avoid soiling of the façade under balconies, terraces above garages, etc., regulated drainage should be provided (e.g., rain gutter, balcony drain, downspout, etc.).
Wood-Specific Features:
Color variations within a wood species
Each terrace board should be fastened from above with at least two screws on each substructure timber. Pre-drilling (slightly larger than the shaft diameter) and countersinking (even for screws with drill points) is generally recommended to prevent splitting and cracking. When using a spacer, the screws should be arranged diagonally. The screw head must be flush with the surface. The edge distance of each screw should be at least 15 mm. There must be a minimum distance of 50 mm or a maximum distance of 100 mm from the board end (end grain) to the fastening (Fig. 2.1). For each board joint, two slats with spacing should be arranged (Fig. 3). The joint should never be aligned with a support slat (Fig. 3.1) (Fig. 3.2).
During production, care is taken to ensure that at least one wide side (= visible side) meets all sorting criteria. When installing, it is important to place the nicer side facing up, regardless of whether it's the right (marked side) or left (unmarked side).
Material Characteristics:
There are several wood species from which dark substances can be washed out over time due to weathering. Dirt can also be released and washed off from the surface of the terrace boards. To avoid soiling of the façade under balconies, terraces above garages, etc., regulated drainage should be provided (e.g., rain gutter, balcony drain, downspout, etc.).
Wood-Specific Features:
Color variations within a wood species
- Natural greying of the wood surface due to weathering
- Cracks and fissures on the surface and at the board ends caused by the swelling and shrinking behavior of the wood
- Tendency of the board to cup or warp
- Resin pockets / resin exudation
- Rough spots in the area of knots and irregular growth
- When the surface is wet, there is a risk of slipping, similar to other materials.
Abb. 1
Abb. 1.1
Abb. 2
Abb. 2.1
Abb. 2.2
Abb. 3
Abb. 3.1
Abb. 3.2
The development of this installation recommendation was done in coordination with Holzforschung Austria (www.holzforschung.at). Reference: 1.) Balconies and Terrace Coverings Made of Wood, Holzforschung Austria, 2nd Edition 2008 / 2.) EN 15146 (Issue 01.03.2007): Interior and Exterior Claddings Made of Solid Softwood - Profiled Boards without Tongue and Groove.