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(See ‘Bathrooms & Kitchens’)
Hard cross grained disfigurations in timber, which are formed where shoots on
trees are developed onto branches. The resin ducts in the timber run parallel
with the growth and the resin the knots flows to the timber. If the exposed
surface of the knots is not sealed before paint is applied there is a danger of
‘bleeding’ into the paint film causing staining and discoloration. In many cases
the resin will exude in the form of sticky unsightly tears and cause blistering in
the paint.
Surface preparation:
Knots exuding resin should be drilled out wherever possible and hole plugged
with sound wood.
Painting: As usual for wood and timber.