Thermally modified wood pergolas
Pergola posts, beams and battens in thermally modified timber that stays straight and resists rot without chemicals. For patios, walkways and outdoor dining. Made in the USA.
Thermally modified wood
Shade structures that keep their lines year after year.
A pergola is all exposed end grain, joints and horizontal surfaces, exactly where ordinary timber checks and decays first. Heat-and-steam treatment locks the wood against seasonal movement so joints stay tight and members stay true.
pergolas
Joints stay tight
Rot and insect resistant
Milled to order
Fire-retardant option
Why specify a thermowood pergola
Structure that stays straight in the sun
Heat and steam remove the moisture-attracting sugars that cause ordinary timber to swell, cup and decay. The surface resists rot and insects without preservatives, and every member is milled to order to the thickness, width and profile your design needs, with minimal maintenance afterwards.
Structural timber
Posts, beams, rafters and battens milled to order.
Chemical-free
Protection comes from heat and steam.
Fire-retardant option
For wildfire zones, by species and profile.
Minimal upkeep
Leave to silver or oil to keep the tone.
Profiles, species
Posts, beams and battens
Pergola members are milled to the sizes on your drawings. Choose Rhino Wood for the hardest, densest timber, VG Hemlock for clean straight lines, or thermally modified Ash and Pine for a warm natural look.
Rhino Wood
VG Hemlock
Heat and steam only, no chemicals, made in the USA
Thermal modification uses only heat and steam. Our thermowood is sourced from certified renewable forests and milled in the USA; the boards are 100% natural, fully recyclable and can go to bio-energy at end of life.
Warm natural
Thermally modified Ash
Ash beams weather to silver-grey or hold a warm tone with oil, with a bold grain that reads well overhead.
Clean lines
VG Hemlock
Knot-free vertical grain Hemlock for slender battens and contemporary louvre roofs. Class A fire-retardant Aegis Reserve available.
Hardest
Rhino Wood
Pine heated to 420 F then pressure-infused with natural wax: about twice the density, comparable to Ipe in weight.
Rhino Wood
Densified and wax-infused
VG Hemlock
Clean vertical grain
Thermally modified Ash
Bold natural grain
Radiata Pine
Even warm tone
Process
Heat and steam
Chemicals
None
Sizes
To order
Made in
USA
Pergola questions
Common questions
Installation guides for cladding, decking and porch flooring are on our guides page.