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  • WIS 2/3-1 Finishes for external timber

  • TRADA Technology Ltd
  • June 2016
  • WIS 2/3-1
  • Wood Information Sheet, PDF
  • 9
  • Free of charge
  • £12.00 (zero VAT)
(WOOD INFORMATION SHEET)
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(PDF ~ 502 kb)
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Timber that has no protective finish will often weather to an attractive appearance. However, in many situations, it is necessary to specify a protective finish. Appearance is often the main reason for specifying a finish, but other characteristics are often important too.
The technology behind protective finishes moves rapidly and the range of generic types and manufacturers' variants is bewildering. Deciding whether to specify preservative, paint, varnish or stain is just the start.

This Wood Information Sheet (WIS) outlines the need for finishes, the different types of finishes as well as the performance of the various finishing types, helping specifiers to select the correct finishing coat for the job.

Contents:

•The need for finishes
•Types of exterior finish
•Considerations for hardwoods
•Considerations for panel products
•Selection of coatings
•Common coating faults and how to avoid them

This Wood Information Sheet was revised in June 2016. Values in Table 1 and the appearance classification criteria were both updated. Tables 2 and 3 were deleted and replaced with a new table listing the determination of relative exposure based on climatic factors.
Timber that has no protective finish will often weather to an attractive appearance. However, in many situations, it is necessary to specify a protective finish. Appearance is often the main reason for specifying a finish, but other characteristics are often important too.
...more