Unique to Swallow Greenhouses, all Thermowood used by Swallow (GB) Ltd. is manufactured from quality red wood pine and this high performance timber from Finland is perfect for wooden greenhouses. It’s heat treated to over 200 degrees to remove moisture and resin.
This process results in a consistently coloured timber, with improved dimensional stability and most importantly improved durability against decay. This a long lasting performance wood developed for exterior cladding of buildings in harsh Scandinavian weather, making it perfect for building tough wooden greenhouses.
Benefits include:
- Destroys resins and proteins and stabilises the timber.
- All bacteria is killed, resulting in a sterile material
- The timber is totally natural and chemical free
- Reduced thermal conductivity
- Improves durability against decay
- Improved dimensional stability
- Good choice for allergy sufferers
Swallow buildings are available to purchase in three options:
Natural ThermoWood Option:
This option has had no treatment at all, it needs to be treated within 3 months after installation, to prolong the life expectancy of the building. Water, condensation can stain the timber and may discolour it, unless it gets treated and also needs regular maintenance.
Oiled Option:
If you choose the oiled finish, then Swallow will give the building one coat of oil treatment before it’s all glazed and sealed ready to be installed.
Swallow recommend that you oil the building annually, outside, and also you can coat the inside to help cut down on water staining which can happen from condensation. This keeps the building looking fresh, it helps to maintain its original colour, and protects the timber from the elements. Swallow recommend something like Osmo Oil or a similar quality.
Painted Option:
When you choose the painted version, firstly the building goes through quality control, then it’s given its first topcoat, once its dry it’s then re-checked and it’s given its second topcoat, then finally once dry it’s glazed and sealed.
When Swallow have installed the building, they will leave you with a pot of touch up paint, as sometimes the building may occur little marks from transportation. Their fitters will inspect the building once it’s installed and do a walk around with you once it’s finished.
Painted buildings won’t need re-painting annually, it may be every 3-5 years depending on where the building is situated in the garden. If it’s tucked away and not in direct sunlight, and not open to all the elements, then it may last longer before you need to re-paint it. You would have to trust your own judgement on this.