Composite Decking GuideComposite Decking Guide
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How to measure a decking area

No two decking plans are the same in terms of layout or size. For this reason, we use a general, cost-effective method that can be applied to 99% of decking plans to calculate the total decking area.

This can be broken down into three simple steps:

  • 1: Break your plan into rectangular areas
  • 2: Calculate the area of each rectangular block
  • 3: Add the results of all rectangular areas together

Not so simple!

For non-rectangular/square decking plans we need to identify the individual rectangular areas that make up a more complex shape.

Example 1

Example 2

Example 3

Break your plan into rectangular areasBreak your plan into rectangular areas
Calculate the area of each rectangular blockCalculate the area of each rectangular block
Add the results of all rectangular areas togetherAdd the results of all rectangular areas together

However, decking plans can become much more complex with curves, wedges and other unique shapes, which would make the basic rectangular approach less and less accurate. In this case, any complex shape can be contained within a ‘bounding rectangle’. Calculating the area of this ‘bounding rectangle’ will help you calculate the maximum decking board area that you will require and help you visualise how much will need to be cut off.

How to do it:

Example 1

Example 2

Use a bounding rectangleUse a bounding rectangle
Calculating the area of this bounding rectangleCalculating the area of this bounding rectangle
Maximum decking board areaMaximum decking board area

How to Install

Tools for composite decking

As a general rule of thumb, normal woodworking tools can be used for cutting, shaping and forming composite decks. Included in your packs is enough clips to allow you to fix your chosen decking to your frame. Please note screws are not included. The same safety rules that apply for using woodworking tools also apply to working with wood composites. A point to bear in mind is that the non-wood component of composite decking can cause high speed circular saws to heat and at times, stick.

Decking frame

The decking frame is the structure that holds your decking plan/design together. As with the variants of the calculation of total decking area that is based on the complexity of the decking plan. The same is also true for calculating the requirements for your deck frame.

What you need to know

There must be a joist at the edge of every rectangular area of decking. There must be a joist every 40cm across each rectangular area to safely support the decking boards. Raised decking plans will require down joists to support the upper frame. Any raised deck higher than 30cm requires local planning permission.


Frequently Asked Questions

What is wood composite?

A wood composite is, in essence, a material that is made from a mixture of natural wood, normally fibres of recycled timber and wood products to which recycled man-made material such as recycled plastics are added. The result is a wood composite material that can be moulded or formed into almost any shape and can be used as a replacement for 100% natural wood traditionally used in garden decking. Garden decking made from wood composite has many benefits over traditional wood decking In that it involves no painting, staining, sealing or sanding. This makes a great low maintenance garden decking solution that does not fade or splinter, it is also slip resistant and comes with a 15 year warranty..

Why are there holes in the middle?

Very well! It’s better than natural grass in many ways; dogs can’t dig it up, muddy themselves on it, or cause it any real damage as long as it’s properly installed..

Where do the recycled products come from?

The wood used in the composite decking boards is sourced from reclaimed/ recycled wood that has been discarded by modern industrial processes and that is usually thrown away after domestic use. This reclaimed wood is processed to produce a fine wood flour that forms the wood component of the WPC decking boards..

What does WPC stand for?

Wood Plastic Composite. The plastic used is not just any old plastic, but reclaimed/recycled plastic that is processed into beads to make it easier to process further..

How is the colour created?

Taking the wood flour and recycled plastic beads, as shown above, bonding and colouring agents are added, then processed to a form that is known as raw wood plastic composite..