Timber Processes

Critical Control for Best Results


All timber we use is recommended for Exterior Joinery by TRADAThe leading authority on wood.

(Click here for our Timber Types offered)


What’s under the paint is also critical for durability! Various different products require different joints so we have added some pictures below to show you which joints we use on our frames and openers and also to show you the high quality timber we use but that you often will not see once we paint your products.


To minimise all possible problems customers can have with wooden windows and doors, it is critical that we only use high grade timber with no knots.



We always make sure the timber is well settled after it comes from the kiln drying process to rid it of all anomalies and to let it settle in its natural dry state before we use it.


Equally important, is our engineering process, which ensures our windows and doors do not bend and bow like many. We spend the extra materials and labour cutting and finger jointing short elements of wood for the centres and covering it with whole elements to ensure the beauty of the timbers grain is maintained on both faces, inside and outside, concealing all joints.

As all the short bits of wood together reduce the likeliness of bending as the grains go different ways, rather than all going to one side therefore increasing the chance of bowing, ours are all opposing each other and are covered in whole planks to further reinforce and reduce the chance of warping. Don’t forget the Din4 glue we use is stronger than the wood itself so our procedure of glueing all these bits together takes a lot more time to make; but significantly increases the strength, durability, stability and aesthetics of our product.



The ideal Moisture Content of wood used for manufacturing Exterior Joinery for the UK climate is between 12% and 16% MC.

This ideal is supported by the BWF (British Woodworking Federation) and the BSI standards.

To ensure our success in providing our customers with a good quality durable product, we carefully select each piece of timber and check its MC. This way we secure consistency in the timber that will be used together, and that is also most similar to the environment it will be moving into.

If the Moisture Content isn’t in the correct range for its environment, the timber will either absorb moisture and swell or it will dry out and shrink, either way this can leave you with faulty windows or doors that may not keep you nor your property warm and dry and will not be very durable.

Unfortunately, many manufacturers ignore these important details and the results are obvious relatively soon:

  • elements bend and bow
  • paint cracks and falls off around the knots where fillers are used to fill holes, which will expose further problems
  • openers get stuck and doors don’t open and close, etc etc.

Rest assured we have already eliminated these potential issues due to the reasons mentioned previously.