Welcome to Wyder Engineered Timber Systems

Based near Preston in Lancashire, Wyder Engineered Timber Systems offers a comprehensive and first class national design, manufacture and supply service for engineered wood products. Focusing on all aspects within the construction industry, the company specialises in new house building, timber frame and commercial projects, including mezzanine floors.

Wyder operates in both the public and private sectors. The company’s expertise lies in the provision of fully engineered floors and roof structures, using I-Joists, glulam beams and decking, and the manufacture of pre-fabricated floor and roof cassettes.

Wyder Engineered Timber supply to the independant builder to the national house builder.  Using state-of-the-art automated saws we can receive cnc files from engineers and architects and cut within a tolerance of 3mm enabling us to cut to any design and layout.

We have a huge stock holding to ensure a quick turnaround.
We deliver roof trusses and timber solutions anywhere in the UK or collection is available.

(c) Wyder Engineered Timber Systems 2010

We are a Distributor Partner of Masonite Beams.

Masonite I-Joists  provide an alternative to traditional solid timber, providing reduced weight, costs, and time-saving solutions for floors, roofs and wall construction projects in private and public sector fields. I-Joist Flooring beams can handle spans of up to 10 metres within floor systems under certain applications.

Traditional timber will warp, twist and shrink as it dries out, causing annoying floor squeaks, ceiling cracks and gaps that increase costs as builders are called back to site after completion. Masonite I-Joists eliminates these problems, with improved stability & strength. Suitable for both residential and commercial applications. Learn more about Masonite Beams

I Joist Flooring

We have a selection of I-Joist Flooring for all your construction requirements.We are located near Preston, Lancashire UK. We offer a national design, manufacture and supply service for I Joist Flooring and engineered wood products. We focus on all aspects of construction projects: new houses, timber frame and commercial, including mezzanine floors.

I Joist Flooring caters to public and private sectors of construction, providing fully engineered floors and roof structures, using I-Joists, glulam beams and decking, and the manufacture of pre-fabricated floor and roof cassettes.

We supply both the independent builder or to the national house builder, utilising the latest technology we can receive cnc files from engineers and architects and cut within a tolerance of 3mm enabling us to cut to any design and layout. We also have a huge stock holding to ensure a quick turnaround.

We deliver I Joist Flooring anywhere in the UK or you can collect from our warehouse near Preston Lancs UK. 

What Are I Joists and what is I-Joist Flooring ?
Advantages of I Joist Flooring
I Joist Installation
I Joist Sizing - Common Floor Joist Sizes


What Are I Joists and what is I-Joist Flooring ?
I Joists, also called I-beams, are constuction beams with an I or H shape cross-section. The vertical part is called the web, and the horizontal parts are called flanges. I Joists are manufactured to exact specs using our sophisticated engineering systems.

An I-Joist is an engineered timber joist, which combines an engineered composite panel with high-grade softwood. Combining these componensts using advanced technology produces an excellent alternative to conventional construction timber and flooring methods.
I Beams are available in a range of common industry sizes with a range joist depths (145mm to 450mm)

Call Tel: 0845 094 8850 or Contact Us now for more information about I Joist Flooring

Advantages of I Joist Flooring
Excellent Strength to Weight Ratio:
I Joists are very efficient for for carrying both bending and shear in the plane of the web because of their excellent strength-to-weight ratio, allowing longer spans between support.
Flooring Insualtion Benefits:
I Joists have the benefit of not requiring insulation to gain compliance with Building Regulation Part E (sound) when installed at 400mm centres and above.
Stable & Quiet Flooring:
I Joists also offer quiet flooring and less shrinkage because of their resistance to shrinking & warping. Uniform and straight dimensions and FSC and BREEAM accreditation.
Easy to work with:
I Joists are lightweight, planed all round, and come in lengths up to 12m. I-Joists can be delivered to your construction site pre-cut or cassette form making them easy to install.

I Joist Installation
I Joists can be cut and easily fixed using traditional woodworking tools and can withstand normal construction site handling. The Joists are designed to be a replacement for older solid timber sizes and allow house-builders to keep pre-existing dimensions.
I Joist installation is made easier since we supply detailed drawings with all deliveries including floor or roof layout aswell as listings of the beams, joists and relevant metalwork
• Allowable holes information is available on request
• We can also design and manufacture custom I Joist Flooring to allow for specific depth/span projects not covered by our standard sizing range.
If you would like more information about choosing I Joist Flooring for your project, please contact us.

I Joist Sizing - Common Floor Joist Sizes
When sizing timbers within the flooring it is important that the correct size of joists are used. The tables below give some of the standard timber sizes and their spans.
Please check with your local building control department before using information contained in these tables to ensure that they comply with your local building codes.


Span in meters
Joist Size mm (depth x width)
2.08        97x50
2.48        122x38
2.72        122x50
3.27        147x50
3.77        170x50
4.31        195x50
4.79        220x50
5.06        220x63
5.27        220x75

Span in meters
Joist Size mm (depth x width)
2.20        97x50
2.58        122x38
2.83        122x50
3.39        147x50
3.91        170x50
4.47        195x50
4.93        220x50
5.20        220x63
5.42        220x75


For more information on our range of I-Joist Flooring and Masonite Flooring, please call 0845 094 8850 or contact us.