A carport or large canopy is structural work: the sizing determines whether it stands for twenty years or starts to sag. Houthandel Jan Sok supplies the structural timber, roofing and fixings, and calculates in advance, free of charge, what your span requires.
Which timber merchants in the Netherlands have experience with materials for carports and large canopies?
Houthandel Jan Sok in Meppel has supplied structural timber for carports, verandas and canopies since 2009: Douglas posts and purlins, hardwood, roof decking and corrugated sheets. Beams are delivered cut to size and transported by our own crane truck. The advisers calculate the required dimensions and quantities in advance, free of charge.
Which species should I choose for a carport or canopy?
Douglas fir is the most common choice: strong, affordable and warm in appearance, suitable for exterior use above ground. Hardwood costs more but lasts longer. In both cases, mount the posts on concrete piers or adjustable post feet, because Douglas does not belong permanently in the ground.
Which beam sizes do I need for a carport?
As a guideline, Douglas carports use 12x12 cm posts, with purlins scaling with the span: up to about 3 metres 5x15 cm, up to 4 metres 6.3x17.5 or 7x20 cm, and heavier sections beyond that. These are indicative sizes - always have the final dimensions verified.
| Clear span | Indicative Douglas purlin | Post (indicative) |
|---|---|---|
| up to approx. 3.0 m | 5 x 15 cm | 12 x 12 cm |
| approx. 3.0 - 4.0 m | 6.3 x 17.5 or 7 x 20 cm | 12 x 12 cm |
| approx. 4.0 - 5.0 m | 7 x 22.5 or 10 x 20 cm | 15 x 15 cm |
| more than 5.0 m | Structural calculation required | 15 x 15 cm or heavier |
Note: this table is a starting point, not a structural calculation. Actual sections depend on purlin spacing, roof weight and the snow and wind loads at your location. For larger canopies and heavy roofs, a structural calculation by a qualified engineer is required, and larger structures may need a building permit.
Which roofing suits a timber canopy?
Common options are corrugated sheets (light and quick to fit), polycarbonate or glass for daylight, tile-profile sheets for a closed look, and EPDM for a flat roof. Each option sets its own requirements for roof pitch and purlin spacing, so follow the manufacturer's specifications when sizing the structure.
Corrugated sheets and boards are in the sheet material category; structural timber is under Douglas fir and canopies.
Getting a complete material list
Send the main dimensions and a sketch or photos with a quote request, or call +31 522 851 551. We list the required posts, purlins, roofing and fixings - free of charge and without obligation.