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Showing results for tags 'preservative'.
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Hi Self Builders A bit of a problem, that I'd like your thoughts on, please. Im building a flat/parpaet roof house with , which calls for preservative impregnation where the roof timbers enters the external walls (of cavity block walls). The builder placed the timbers today, and built blocks between the timbers and one row on top, but without the preservative, nor did he wrap them in DPC - there are 2 more rows of blocks to go to take it to the top of the parapet. Is this a serious omission, do I get a rework? Is there some other mitigations, other than a rebuild that I could ask for, that would suffice? Clearly, if it must be done, I'll ask for the preservative and rebuild - but I want to be reasonable, if there is another sufficient answer.
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- tanislised timber
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On our flat roof, it looks like I need to join two sections of wall plate together. Thanks to everyone on this thread I'll make the join so that at least three joists are resting on the plate (NHBC Standards 2018, 7.2.6 Wall Plates). (Thanks Gary @nod ) The same guidance suggests I should use a coloured timber preservative (7.1.4) And I bet they don't mean the stuff you get from B+Q. An Internet search gets a flurry of probably irrelevant results. Do they mean the blue color stuff you get on roofing battens? Ideas anyone?