Fitting New Floor Joists Loft

Hard lines are the walls on the first floor underneath joists on the first floor landing run left to right so does that mean the central wall running front to back is load bearing.

Fitting new floor joists loft. You can still board directly on to the joists if you want but it is worth noting that this would not. Clearing the loft area of all debris insulation struts and temporary boards to expose the. Most new construction uses 2 by 8 lumber for joists although 2 by 6. I ve read previous posts on this topic but found conflicting views.

If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists. Installing new joists for loft conversion. There are many ways of altering roof structures for loft conversions but they all have one common element the ceiling joists will almost certainly be inadequate as floor joists. I would really appreciate some advice on fitting some new joists for a loft conversion.

In the case of 2x6 joists you can pair them up with additional 2x6 joists by nailing them together side by side. First off basic floor plan of the loft. A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. Measure the width and length of the existing joist.

Total loft dimensions are 5 2m left to right 7m front to back. Purchase the type of lumber that matches the width of the existing joist. Structural engineer has specified 9x3s as the new floor in the loft. I plan to leave the old joists in and sister them up.

5 posts page 1 of 1. The best solution is to build a raised loft floor above the insulation details of which are shown below. I have plenty of trade experience as i am an electrician but am unsure of a couple of aspects regarding some of the. Sistering is the process of adding a new joist next to each existing joist.

This means that new floor joists are fitted alongside them slightly raised above the ceiling plasterboard to avoid contact with it. Furthermore squashing insulation down to fit joist height is a bad idea as this halves it s effectiveness doubling your heat loss. How we install a new loft floor.