Welcome to the Composite Warehouse

Create your dream low maintenance garden with our large range of composite materials from cladding your exterior home, or new garden room, even switching or replacing your fencing with our composite fence panels that will not only modern your garden but ensure it stands out with its large variety of colour and surface texture finishes.

Even keep it traditional with our composite decking boards with their natural reversible grooves or wood grain finishes, developed to provide our consumers with alternative low maintenance decking solutions that are resistant to rotting, splintering, and decay with their low moisture absorption ensuring you never need to stain, seal or even paint your deck.

Read More


Composite Joist 3m x 100mm x 50mm

£38.88 /board

Available Colours: Black
Size: 3m 100mm x 50mm (size can vary by 2 to 3mm)

Availability: In stock



Composite Joist




Composite Joist: 3m x 100mm x 50mm


Composite Joists are a stronger and more durable alternative to wood Joists. They are long-lasting and will stand the test of time for decades whether you are using them as a subframe for your decking project or to connect your cladding to an exterior wall. Composite Joists have resistant properties against rotting and splintering and are the perfect solution for a strong and durable joist to complete your project.

Key attributes:

  • Moisture resistant, reducing issues of rotting or warping
  • Long-lasting meaning you won’t have to replace or repair for decades
  • Hassle-free with extremely low maintenance
  • Will stand the test of time
  • Increased UV protection
  • Easy to install no matter the project
  • Made with recycled materials of plastic and wood fibres
  • 17 kg in weight per composite decking joist
  • Eco Friendly option using recycled materials

All of our composite battens at Composite Warehouse provide quality and durability. All of our composite joists are created using the highest quality materials and come in a solid profile finish, creating increased strength & durability.


Composite Joists are a great solution to timber joists or battens, due to their strength, durability and longevity. Additionally, they are also an eco-friendly solution, reducing waste in landfills & the sea.

Composite Joist are an investment and are better suited to projects that will receive a larger footfall, more pressure or need a longer life span. If your project is commercial, it is recommended to use composite battens for extra strength and stability.


There are no reviews yet.

Be the first to review “Composite Joist 3m x 100mm x 50mm”

Your email address will not be published. Required fields are marked *

Your email address will not be published. Required fields are marked *