Polytunnel Base Rails. Retro Fit

🔧 Aluminium & Timber Base and Side Rail Fittings

Strong, universal fittings for securing polytunnel covers

We supply aluminium or timber base and side rail fittings designed for garden and commercial polytunnels. Available in 25mm, 35mm, 50.8mm, and 60.3mm, these fittings provide a reliable method of fixing the polythene cover to the frame — eliminating the need to dig trenches.

By locking the foundation tubes together as one continuous structure, base rails significantly increase the strength and stability of the polytunnel. They also make future maintenance easier, allowing the cover to be replaced quickly when refurbishment is needed.

These fittings are compatible with most polytunnel brands, offering a simple, effective upgrade regardless of the manufacturer.

We offer a wide range of brackets, clamps, and fittings suitable for both garden and commercial polytunnels, regardless of the manufacturer. Our available sizes include 25mm, 35mm, 50.8mm, and 60.3mm. All fittings are galvanised or zinc plated to ensure a longer lifespan. If you have any doubts or questions, please don't hesitate to contact us.

Click the links below for other parts.

Intermediate base and side rail fittings .

Ridge bars fittings.

Door frame brackets.

Q Clips

Single Aluminium Extrusion (Base rail), available in a variety of lengths. We use this single profile on base rails for Polytunnels. Designed to accept 200 micron polythene and used in conjunction with our PVC infill and Rail Joiners.

Attached to the framework with intermediate and corner clamps.

Make your polytunnel project more straight forward with our comprehensive Base Rail Kits. These kits come with all the fittings, battens and nails you need for a professional-looking finish. Our retro fittings are compatible with polytunnels from any manufacturer, ensuring they fit perfectly on any project.  If your polytunnel is 12ft wide just choose the length from the 14ft wide list.

Please Note:  You must ensure that your foundations are set in concrete, alternatively you can use anchor plates or screw anchors.

Should you require larger fittings please contact us.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete; alternatively, you can use anchor plates.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete; alternatively, you can use anchor plates.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete; alternatively, you can use anchor plates.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete; alternatively, you can use anchor plates.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete; alternatively, you can use anchor plates.

 Our base rails are designed to fit most polytunnels and feature 50.8mm or 60.3mm fittings, 75mm x 75mm treated timber, battens and nails, providing you with the convenience and versatility needed for an effective agricultural setup.  Perfect for those who want to replace existing rails or upgrade their polytunnel setup to the next level! Our retro fittings are easy to install.

Please note:  You must ensure that your foundations are set in concrete.