1.8m x 75 x 75mm Knee Rail Fencing Top Rail
Product Description
1.8m x 75 x 75mm Knee Rail Fencing Top Rail
Timber Knee Rail Fencing is a practical, low-level boundary solution made using traditional birdsmouth joints. Also known as Ascot or diamond fencing, it consists of horizontal timber rails fitted to vertical posts, creating a clear boundary without blocking visibility.
Please note: Timber Knee Rail Fencing does not meet highway specifications.
Features & Applications
Knee Rail Fencing helps define boundaries, guide pedestrians and protect landscaped areas while maintaining clear sightlines.
The birdsmouth joint features a notch at the end of each rail, allowing it to fit securely against the post for a strong connection.
Made from durable, treated timber, it is suitable for a range of outdoor areas, including:
- Car parks and parking areas
- Pathways and walkways
- Parks and landscaped spaces
- Grass and flower bed boundaries
- Pedestrian routes
The system uses timber top rails and birdsmouth posts, secured with galvanised straps and nails. It is designed for in-ground installation, with posts fixed using Post Mix.
75 x 75mm Timber Top Rail
This 1.8m long top rail is manufactured from Tanalith E Green-treated Norway Spruce timber and measures 1800mm x 75mm x 75mm.
Other options are available, including:
- 100 x 100mm top rails
- 3.6m long top rails
- Matching birdsmouth posts
- Galvanised fixing straps
The timber is supplied by a reputable UK sawmill and is predominantly sourced from North Wales. FSC certification is available upon request.
Tanalith E Green treatment helps protect the timber against decay and outdoor exposure. Its colour naturally changes over time, from pale green to honey and eventually silvery-grey.
Installation
Knee Rail Fencing is designed for in-ground installation, with posts fitted at 1.8m centres and approximately half of each post buried underground. The finished fence is typically installed at either 450mm or 600mm high.
For a secure installation, we recommend:
- Installing posts at 1.8m centres
- Burying approximately half the post length underground
- Using at least two bags of Post Mix per post
- For 75 x 75mm top rails, choose between a V-style strap or shoe-style strap
- The Bishop's Hat-style strap is designed for 100 x 100mm top rails, where the rail overhangs the birdsmouth post
Although the timber is pressure-treated, applying additional wood treatment, particularly to cut ends, can provide extra protection and help extend its service life.
Complete Your Knee Rail System
Complete your installation with our range of Knee Rail Fencing, including matching birdsmouth posts and galvanised straps.
Contact Us
Need help choosing the right knee rail components? Our friendly sales team is happy to help with product advice, installation guidance and any questions you may have. Call us on 01283 512 111, email sales@firstfence.co.uk, or speak to our team through our online chat.
Specifications & Downloads
| Length | 1800mm |
| Width | 75 x 75mm |
| Material | Timber [Green Treated] |
| Conforms to | Tanalised to UC4 |
Videos
Specifications & Downloads
| Length | 1800mm |
| Width | 75 x 75mm |
| Material | Timber [Green Treated] |
| Conforms to | Tanalised to UC4 |
Product Description
1.8m x 75 x 75mm Knee Rail Fencing Top Rail
Timber Knee Rail Fencing is a practical, low-level boundary solution made using traditional birdsmouth joints. Also known as Ascot or diamond fencing, it consists of horizontal timber rails fitted to vertical posts, creating a clear boundary without blocking visibility.
Please note: Timber Knee Rail Fencing does not meet highway specifications.
Features & Applications
Knee Rail Fencing helps define boundaries, guide pedestrians and protect landscaped areas while maintaining clear sightlines.
The birdsmouth joint features a notch at the end of each rail, allowing it to fit securely against the post for a strong connection.
Made from durable, treated timber, it is suitable for a range of outdoor areas, including:
- Car parks and parking areas
- Pathways and walkways
- Parks and landscaped spaces
- Grass and flower bed boundaries
- Pedestrian routes
The system uses timber top rails and birdsmouth posts, secured with galvanised straps and nails. It is designed for in-ground installation, with posts fixed using Post Mix.
75 x 75mm Timber Top Rail
This 1.8m long top rail is manufactured from Tanalith E Green-treated Norway Spruce timber and measures 1800mm x 75mm x 75mm.
Other options are available, including:
- 100 x 100mm top rails
- 3.6m long top rails
- Matching birdsmouth posts
- Galvanised fixing straps
The timber is supplied by a reputable UK sawmill and is predominantly sourced from North Wales. FSC certification is available upon request.
Tanalith E Green treatment helps protect the timber against decay and outdoor exposure. Its colour naturally changes over time, from pale green to honey and eventually silvery-grey.
Installation
Knee Rail Fencing is designed for in-ground installation, with posts fitted at 1.8m centres and approximately half of each post buried underground. The finished fence is typically installed at either 450mm or 600mm high.
For a secure installation, we recommend:
- Installing posts at 1.8m centres
- Burying approximately half the post length underground
- Using at least two bags of Post Mix per post
- For 75 x 75mm top rails, choose between a V-style strap or shoe-style strap
- The Bishop's Hat-style strap is designed for 100 x 100mm top rails, where the rail overhangs the birdsmouth post
Although the timber is pressure-treated, applying additional wood treatment, particularly to cut ends, can provide extra protection and help extend its service life.
Complete Your Knee Rail System
Complete your installation with our range of Knee Rail Fencing, including matching birdsmouth posts and galvanised straps.
Contact Us
Need help choosing the right knee rail components? Our friendly sales team is happy to help with product advice, installation guidance and any questions you may have. Call us on 01283 512 111, email sales@firstfence.co.uk, or speak to our team through our online chat.