A lot of blame for squeaky creaky sub-floors can be attributed to chipboard, and rightly so. Chipboard is a chronic and consistent problem in our day and age. Although chipboard can be associated with approximately 90% of the typical squeaks and creaks, over the years we’ve found several areas that also add to the noise..
One of them being mid joist support noggins and/or perimeter noggins. Often the solution is to remove and replace them, remove them all together (where allowing – Certain placement of some noggins being incorrect or serving no purpose), or inject adhesive between the noggin and joist as to act as a gasket and re-fix with adequate screws.
There are three typical reasons for these noggins to create noise. The first, being loose nails or nails that have become loose as the noggin and/or joist have shrank due to them having a to high moisture content during the initial installation and now have dried. The second, poor installation i.e. not enough fixings or poorly located fixings. The third, warping of the joists, which narrows the point of contact between the noggin and joists. Essentially creating a highly pressured rubbing point.
The video below illustrates the potential noise a noggin can produce. In this instance, you’ll hear a very metallicy sound as a loose nail rubs against the wood as well as the rubbing of the noggin against the joist. It’s clear this noggin was being pulled from left to right, but it was making similar noises when walked across. The video is merely for demonstration purposes.
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