Website prices apply to online orders only

Treated Joists 47MM X 250MM


From £35.53£27.07

Pressure treated timber preserved against fungal decay and insect attack for internal and external use not in contact with ground. Suitable to use for decking applications; structural applications such as roof joists, flooring joists, wall partitions. These joists have been kiln dried with regularised, eased edges allowing for a smooth surface all around the joist. With roughly 80-90% of stock being C24 grade.

Please bear in mind, that the sizes given on the website are nominal sizes, meaning the timber is measured before it is regularised.

Measures: 47x250mm (finished size roughly 45x250mm)


Out of stock in Crawley

Product Length

Sorry, this product is unavailable.

Please choose a different combination

Product detailed description

Superior Strength Treated Joists 47MM X 250MM – Your Ultimate Building Companion

Introducing our Treated Joists 47MM X 250MM, the perfect solution for a vast range of indoor and outdoor construction projects. Boasting a unique combination of strength, durability, and versatility, these timber joists are the go-to choice for builders and DIY enthusiasts alike.

Our Treated Joists are pressure treated to resist fungal decay and insect attack, making them ideal for applications where long-term reliability is paramount. Whether used in decking, roofing, or building partitions, these joists offer an unmatched level of performance.

Each piece of timber is kiln-dried and regularised, with eased edges for a smooth, user-friendly surface. This process ensures a consistent finish and size, with the finished product measuring approximately 45x250mm.

What sets our Treated Joists apart is their superior quality grading. Approximately 80-90% of our stock is C24 grade; a high-quality timber grade that offers enhanced strength and stability. This makes our joists suitable for a wider range of applications, offering you greater flexibility in your projects.

Key Features and Benefits:

  • Pressure Treated: Offers long-term protection against fungal decay and insect attack.
  • Kiln Dried & Regularised: Ensures a consistent, user-friendly finish.
  • C24 Grade: High-quality timber grade for enhanced strength and stability.
  • Versatile: Suitable for a wide range of indoor and outdoor applications, including decking, roofing, and building partitions.

Please note that the sizes provided on our website are nominal, meaning the timber is measured before it is regularised.Invest in our Treated Joists 47MM X 250MM today and experience the difference in quality and performance. Don’t compromise on your construction project – choose a product that’s built to last.

Payments by

Credit cards accepted


01494 671921

Pyebush Lane, Beaconsfield, Bucks. HP9 2RX


01342 717155

Wallage Lane, Crawley, West Sussex RH10 4NQ

sign of guarantee 15 years

15 Year Guarantee on timber

All our timber posts come with a 15 Year guarantee, but they’ll usually last even longer.

Delivery in South East England

Standard delivery within 5 working days

Find out more

Click & collect


Click & collect from Timberstore Beaconsfield or Crawley tomorrow 2pm

Find out more