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Post by 9fingers on Jun 10, 2008 14:16:42 GMT
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Post by andy on Jun 10, 2008 19:23:24 GMT
My understanding is that pressure treatment makes the wood unpleasant to eat for the creatures that cause the problem not make it water proof
a couple of observations that might be the cause of the problem;
PVA(d3) although sold as exterior is only water resistant
PVA(d4) is water proof but not suitable for submerged conditions
Pressure treated timber is usually damp and stored outside by merchants PVA glue requires dry timber
Pressure treated timber is usually rough sawn again not suitable for PVA glue as the joint faces have to be a good fit (PVA not very good at gap filling)
Just my thoughts as when the need arises I prefer to use polyurethane glue
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Post by mel on Jun 10, 2008 21:05:58 GMT
Another vote for PU glue here
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Post by 9fingers on Jun 11, 2008 7:38:43 GMT
I'd agree on PU as a first choice too especially as PT timber tends to be wet as delivered.
I was trying to get to the bottom of the PVA being attacked by the treatment chemicals or not assertion.
Bob
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Post by engineerone on Jun 11, 2008 7:42:58 GMT
surely the problem is more to do with the fact that the glue has nothing to "hold " chemically rather than necessarily attacking the pva  paul  |
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