b and q pressure treated timber

[johnnyb]

I've just started to repair my decking and every joist apart from one from b and q was in perfect condition.
the other ones were sawn and treated especially for me from a Woodyard the other side of Nottingham. the b and q joist and all other pressure treated wood from b and q was totally rotted. a salutary lesson for me and anyone reading this! 95% of the deckboards were fine I think they came from wickes. just the odd bit had rotted maybe pith areas

 

[johnnyb]

the green arbour is untreated redwood just showing a bit of rot.

 

[eribaMotters]

Many years ago I had some scaffolding boards pressure treated with preservative for garden edging. 15+ years later they were still good so I decided to do a similar job on another part of the garden. My local timber merchant offered me tanalised pressure preserved decking timber and posts. I noted the BS rating and had a look online. I was shocked that the decking timber sold by many outlets is NOT suitable for ground contact. I believe you need BS8417 Graade 4.

Colin

 

[MARK.B.]

Right you are Colin , the last job i had before deciding it was time to quit the working malarky for good was pressure treating timber for many of the major suppliers and trade We also tried to accommodate the public when time and space in the pressure vessels allowed. Some of the many things we did were posts by the thousand , most were given the cheaper treatment but we also did a lot of grade 4 posts . One big customer had us hammer in a hard plastic nail into the end of each post using a different colour every year . That way if the post rotted off at ground level and any claims were made against them they could tell how old the broken post or posts were

 

[Woody2Shoes]

I wouldn't put any timber in contact with the ground, or within 6ins of it, regardless of treatment.

 

[johnnyb]

this was after 15 years though. I was amazed the condition was so good. even the screws came out.
mme