The vast majority of joists in the UK are either 400mm or 600mm apart (measured from the centre of one joist to the centre of the next one). That is why our Cross-Beams are designed to span 1200mm, so they fit perfectly. Importantly, there is also up to 75mm tolerance in case your joists weren't built exactly to these dimensions (many weren't!). And because the Cross-Beams bridge over intermediate joists, if you find there are any that are uneven or warped, you can just miss these out. So for most UK properties, everything will work fine.
Some older properties do cause certain issues when the joists are of uneven height or not flat. This doesn’t stop StoreFloor being fitted, but it’s worth considering the following points:
- The first point to note is that StoreFloor bridges over, and completely misses out, most joists, since the Cross-Beams span 1200mm. Therefore, with a bit of planning, you can often choose to place the supports in such a way as to completely miss out the joists that cause the problem.
Occasionally however you will find that, even with the best planning, some of the joists you fix the supports to could be higher than others, or too uneven to screw into. The way our installers get around this is either by fitting a wooden shim underneath some supports, to make everything level, or to screw a small new piece of wood to the side of the original joist, and to fit the support on to that. If you'd like someone to install your kit in these circumstances, please visit Nationwide Loft Storage to find your nearest Approved Installer.