Origin Charred or burnt wood  (yaki sugi-ita, yakisugi, shou sugi ban) has evolved from a Japanese technique of preserving and enhancing the look of wood mainly used for the external building envelope i.e cladding. This is done with the use of fire, burning to create a  heat treated surface and carbonised layer around the timbers exposed…

There are two ways to specify treated wood – 1. by referring to the British Standard BS8417 or 2. by using the Wood Protection Association (WPA) commodity code system : Option 1: Using reference to the British Standard The British Standard for wood preservation is BS8417. This code of practice defines treatment by preservative penetration…

Never assume that any timber product that has a treatment colour pigment has been treated appropriately, the type of preservative treatment and amount of preservative loading determines if the timber has been treated appropriately, based on the final desired end use.Pressure treated timber is undertaken in a pressurised tank  (chamber or vessel) and pressures can be…

  Timber has a large selection of species that are naturally durable and do not need any additional preservative treatments to make them resistant to biological decay. The vast range is available in many hardwoods and modified species ( including softwoods like Siberian larch and imported western red cedar). If choose a non-durable species, e.g….

  Commercial Timbers for use in  Construction, Joinery, and Furniture   We have more than 1500 commercial timber species available to use in the Construction, Joinery and Furniture sectors this is ever increasing with the addition of modified timbers. We narrowed down to appx 100 species in the Gallery – find your wood here, to help…

A number of chemical brands and technologies are available for pressure treated timber, below is a list of the common timber treatment technologies used for protection against biological decay. Copper-organic (water-based) Use class suitability: UC1, 2, 3 and 4. Application process:  high-pressure Suitable for situations were a risk of bio-deterioration is high, e.g. ground and fresh…

Wood Natural durability classifications are based on the woods ability to resist degradation to wood destroying fungi. Wood destroying fungi and insects are the most significant threats to wood or timber durability in the UK. Insects tend not to be a serious risk in the UK as wood destroying insects prefer the warmer climates, e.g….

To be able to answer the question you need to know, the timbers durability class as given in BS EN350-2, you also need to know the Use class of the timber given in BS8417 all explained below.Biological performance is based on the resistance to microbiological attack of a species heartwood. Standards or reference documents used…

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