I have a new but badly creaking 18mm Caberfloor P5 T&G chipboard floor in a newly built kitchen diner extension, approx area is 30m2, in my 1930’s house. The boards are PVA glued on the T&G edges, it has noggins supporting every joint end, and is screwed down on 400mm centre joists at approx 300mm screw centres.
But it creaks so badly in many places that, half way through laying it I have asked the builder to stop, so that we can make a decision on how to proceed.
The structure underneath the chipboard brings three old levels and a varying void beneath of 700, 300 and 120mm depths bringing new and old joists together on the same original support brick wall. The joist spans from walls or hangers are supported by brick dwarf walls mid-way so there are no areas of more than 1.6m that are unsupported.
I have spoken with the tech helpline at Norbord who manufacture Caber P5 board. They say that chipboard itself does not creak, the noise is down to the stability and true levels of the new underfloor. My builder maintains that the floor meets current building regs and requirements and that is what you get.
I read here that people just go round putting in more screws, but that doesn’t address it at source, if the levels aren’t right then this will just set up more tension. Norbord say that screwing it down is better than nailing but that using their Joist & Joint, a soft mastic/glue to glue the board to the joist as well as gluing the side T&G joints will hold the chipboard down and remove the creaking.
There are specialist companies who will remove the chipboard (on new houses even), resolve the structural problems, glue and screw 18mm plywood T&G and use an acoustic sealant/adhesive + special fastenings. They aren’t cheap but do promise to eradicate the problem completely.
Your views please, I am not going to put expensive floor covering on a dodgy floor so would appreciate any help and direction on this.
Thanks
But it creaks so badly in many places that, half way through laying it I have asked the builder to stop, so that we can make a decision on how to proceed.
The structure underneath the chipboard brings three old levels and a varying void beneath of 700, 300 and 120mm depths bringing new and old joists together on the same original support brick wall. The joist spans from walls or hangers are supported by brick dwarf walls mid-way so there are no areas of more than 1.6m that are unsupported.
I have spoken with the tech helpline at Norbord who manufacture Caber P5 board. They say that chipboard itself does not creak, the noise is down to the stability and true levels of the new underfloor. My builder maintains that the floor meets current building regs and requirements and that is what you get.
I read here that people just go round putting in more screws, but that doesn’t address it at source, if the levels aren’t right then this will just set up more tension. Norbord say that screwing it down is better than nailing but that using their Joist & Joint, a soft mastic/glue to glue the board to the joist as well as gluing the side T&G joints will hold the chipboard down and remove the creaking.
There are specialist companies who will remove the chipboard (on new houses even), resolve the structural problems, glue and screw 18mm plywood T&G and use an acoustic sealant/adhesive + special fastenings. They aren’t cheap but do promise to eradicate the problem completely.
Your views please, I am not going to put expensive floor covering on a dodgy floor so would appreciate any help and direction on this.
Thanks
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