How To Fit Loft Floor Joists

Joist hangers only proprietary joist hangers complying with bs 6178 part 1 1999 or bs en 845 1 can be used subject to the manufacturer s.

How to fit loft floor joists.

Install the sister joists. Also nail each sister to the top of the exterior wall and any supporting walls or beams. Nail the sister to its mating joist with 10d common nails. This can be done in two ways.

Fit each new joist in place next to an old joist so their faces make full contact and their top edges are flush. Furthermore squashing insulation down to fit joist height is a bad idea as this halves it s effectiveness doubling your heat loss. A basic floor system is installed in about 10 stages from preparation to boarding the floor. You can still board directly on to the joists if you want but it is worth noting that this would not.

Your sub floor joists should be at 400mm centres meaning the edge of the boards always falls on a joist too. Loft conversion floor joist spans see description you attic flooring 101 all you need to know bob vila beefing up attic joists for living e jlc online can you convert your attic to living e board vellum. This is possible by constructing a dwarf timber stud wall 1m to 1 5m high known as an ashlering between the two. Continue to lay chipboard flooring across the joists for the rest of the floor ensuring the joints along the 600mm edges are staggered always avoid joining on the same joist wherever possible.

Clearing the loft area of all debris insulation struts and temporary boards to expose the ceiling boards. A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. The best solution is to build a raised loft floor above the insulation details of which are shown below. Loft conversion part 4 fit and cut more joists joist.