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Douglas fir tongue and groove 300cm (10/21x165mm)
SKU 17115300
Features Douglas fir tongue and groove 300cm (10/21x165mm):
+ Size: 1.0 / 2.1x16.5x300cm
+ Long lifespan, is one of the hardest European coniferous woods
+ Available in various lengths, widths and thicknesses
+ Color: blank, also available in black
+ Douglas is durable and does not need to be pressure impregnated with heavy metals unlike pine or spruce
+ FSC and PEFC certified from responsible forest management
+ Treat with fungus protection
+ Working 15cm width
+ Warm appearance
Delivery in 5-21 days
Product description
Douglas Fir Tongue and Groove 300cm (10/21x165mm)
The Douglas Fir Tongue and Groove 300cm (10/21x165mm) is a strong and durable softwood cladding board known for its excellent structural properties and attractive natural grain. Douglas fir is widely used in construction due to its high strength-to-weight ratio, making it ideal for both decorative and functional timber applications.
With a length of 3000mm and a variable thickness of 10/21mm combined with a width of 165mm, these boards provide a solid and reliable cladding solution for both exterior and interior projects.
Key Benefits
- High-strength Douglas fir softwood.
- Attractive natural wood grain appearance.
- Strong tongue and groove connection for a tight fit.
- Suitable for structural and decorative applications.
- Stable and durable timber species.
- Easy to machine, treat and finish.
- Ideal for both interior and exterior use.
Applications
This Douglas fir tongue and groove cladding is suitable for a wide range of projects, including:
- Facade cladding
- Garden sheds
- Summer houses
- Garden rooms
- Cabins
- Exterior wall cladding
- Interior feature walls
- Structural timber constructions
Specifications
| Material | Douglas fir softwood |
| Profile | Tongue and groove |
| Length | 3000 mm |
| Thickness | 10/21 mm |
| Width | 165 mm |
| Application | Interior and exterior cladding |
Installation
Install the boards onto a straight, ventilated timber subframe to ensure long-term stability. Use stainless steel or galvanised fixings to prevent corrosion and staining. Allow proper ventilation behind the cladding and treat all cut ends before installation for optimal durability.
Maintenance
Douglas fir is naturally durable but benefits from regular maintenance. Apply stain, paint or wood preservative to protect against moisture and UV exposure. Without treatment, the wood will naturally weather to a grey patina over time.
Related Products
Complete your project with our decking screws and garden fencing.
How to Install Douglas Fir Tongue and Groove Cladding
- Prepare a level and ventilated timber framework.
- Ensure adequate airflow behind the cladding.
- Start installation from the bottom upwards.
- Connect boards using the tongue and groove system.
- Fix securely with stainless steel or galvanised screws.
- Treat all cut ends before installation.
- Apply protective finish if required.
Frequently Asked Questions
Is Douglas fir suitable for outdoor use?
Yes. Douglas fir is naturally strong and suitable for exterior cladding when properly installed and maintained.
Can it be painted or stained?
Yes. Douglas fir accepts paint, stain and wood preservatives very well.
What does 10/21mm thickness mean?
This indicates a profiled board with varying thickness depending on the tongue and groove section.
Can it be used indoors?
Yes. It is also suitable for interior feature walls and decorative applications.
Which fixings should be used?
Stainless steel or galvanised fixings are recommended for long-term durability and corrosion resistance.
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