JAS Timber

How to Install Timber Decking: A Brief Guide

Timber decking is an excellent way to increase and enhance your outdoor living space, as well as to add both aesthetic and financial value to your home. This edition of the JAS Timber blog offers a brief guide on how to install garden decking, a process that can easily be achieved by the confident DIYer.

Please note that this guide assumes you have already carried out the process of designing and planning your intended decking structure and that the necessary planning permission (if this is required) has been obtained.

  • Prepare by making sure the area is completely clear of any plants, turf, debris or other obstacles. Using a roller, compress the ground to make sure it is completely firm. 
  • With the use of stakes and string, mark out the exact location of where you plan to install your decking structure. Re-check the measurements to be absolutely certain that they are correct.
  • Though not essential, it is highly recommended that you lay down a weed control membrane to prevent weeds from growing up between the decking boards later on. 
  • Lay down concrete blocks or paving slabs at the centre and corners of the desired decking area. As well as providing support for the foundation framework, these will also keep the weed control membrane firmly in place. 
  • You can now start on building the decking's framework. You can either pre-fabricate this framework or build it directly in the finished space. Build a box frame that will allow the decking to overhang at each edge; the overhang measurement should be the width of one decking board. 
  • Inside the frame, lay joists with gaps of 40cm between each one and screw into place. Note that the joists need to be laid perpendicular to the direction in which the decking boards will be laid. Short lengths of timber (known as 'noggins') placed between the joints will imbue the finished framework with extra strength. If you have pre-fabricated your framework, you can now place it into position. Check that it is perfectly level.
  • Lay your boards into their intended positions without securing them, to check that they will fit into place correctly. If so, remove the boards and proceed to the next step. 
  • Lay down the first decking board, beginning at one edge. Fit the board into place tightly with decking screws; each end of the board should be secured before inserting a screw into the central joist. 
  • Repeat the above step with the remaining boards, leaving a gap of between 5mm-10mm between each. These gaps ensure that their is room for natural expansion of the wood.  

Here at JAS Timber, we have a comprehensive collection of top-quality treated decking boards in stock, along with related ancillaries like newel caps, handrails, deck strings and decorative balustrades. We also supply a number of decking spindles such as our popular chamfered spindles and attractive colonial spindles. Check out the JAS Timber website to discover the complete collection.

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