Build a patio

Build a patio and timber decking – silver grey and environmentally classified

Thoughts of sitting on a welcoming patio spring to mind more and more frequently. A patio or timber decking can easily be converted into an extra outdoor space in the summer. We grill, drink coffee, sunbathe and watch the children play. A variety of materials can be used to construct a patio. Many choose to use wood, which gives a softer and a greater sense of living than stone and then choose to build a timber deck.

Building a patio requires some preparations and it is important that you read our installation instruction or our decking guide before you start.

OrganoWood® modified decking timber is an environmentally classified and alternative to traditional pressure impregnated timber. All substances in the products from OrganoWood® are classified as environment-friendly according to the CLP Regulation (EC no. 1272/2008) and can be returned to the natural cycle. So the timber does not need to be recycled as environmentally hazardous waste, but can be recycled as untreated timber according to local regulations. OrganoWood offers an attractive, natural coloured decking timber with an efficient natural protection against the weather and wind. Our decking timber has been developed to fully cope with the prevalent conditions during installation above the ground. Application areas for OrganoWood® include timber decking, walkways, terraces and patios in outdoor spaces. The timber decking is naturally coloured from the outset and over time takes on a beautiful silver grey shade.

In addition, the modification gives the wood a hard and fine surface that improves the life of the decking. The raw material comes from the best pine district in Sweden.

Decking guide for those who wish to build a patio

Plan the area where you intend to lay the decking, set out strings and consider it. Draw and plan what dimensions you want to use.

Preparatory work
C/C joist spacing (not public use): For thickness 22 mm, at least c/c 400 mm. For thickness 28 mm and 34 mm, at least c/c 600 mm.
Drop: Create a slight drop out from the house (about 1 cm per 4 metres).

Store the timber covered and well ventilated before installation.

Ground area
The ground below the decking must consist of a draining material with a drop from the house. If there is a risk of rising ground moisture, then particular attention this must given to this when designing the structure.

We recommend that the decking has a spacing of at least 300 mm to the ground in order to reduce the moisture problem in the wood. We recommend, in terms of the structure, that the floor is ventilated from below to minimise problems with buckling.


Number of screws per fastening point: 2 or 3 pcs.

Generally, OrganoWood® does not need to be predrilled. However, predrilling is recommended if screws need to be placed closer to ends than 4 cm.

Use good quality stainless steel screws in grade A2 or A4, or surface treated screws in quality C4.


Air gap
OrganoWood® modified decking timber is delivered dry (moisture ratio about 18 %). Therefore use an air gap between the boards of at least 7 mm for a width of 120 mm, at least 9 mm for a width of 145 mm and at least 11 mm for a width of 170 mm. Variations in the wood’s moisture ratio (season variation) can affect the decking’s actual dimensions, always check the width of the wood prior to installation to adapt the width of the air gap.

Saw cut
In the event cutting, making holes and other minor processing in the timber is unavoidable, the processed surfaces
must be treated with OrganoWood® 01. Protection: in order for the root protection to remain optimal. We recommend that visible wood ends are treated with OrganoWood® 02. Repellent: Dirt and water repellent for the best protection.

One effect that can occur on all timber placed outdoors and ages is so-called furring (“fibre fuzz”). This is primarily occurring in heavily, sun-exposed environments when the lignin, which binds the timber’s fibres, are broken down by the sun’s UV radiation. Furring is a completely natural process in the timber’s “cycle” and does not affect the characteristics of the timber. This is a phenomenon that diminishes over time. If superficial fibre fuzz occurs, this should be sanded using a fine sandpaper or brush off the fibres when the patio is dry and treated with OrganoWood® 02. Repellent: Dirt and water repellent.

Surface treatment and maintenance

After installation, treat with OrganoWood® 02. Repellent: Dirt and water repellent once (does not apply to OrganoWood® Select Plus or OrganoWood® Magnum Plus decking timber), no other surface treatment is recommended. When soiled or unwanted superficial growth, wash the decking with OrganoWood® 03. Cleaner. After washing, it is recommended that the decking is treated with OrganoWood® 02. Repellent: Dirt and water repellent. OrganoWood® modified decking timber must not be painted over. We recommend surface treatment with OrganoWood® 02. Repellent: Dirt and water protect every other or every third year, or if necessary.

See the product datasheet for each OrganoWood® surface treatment product.