Fitting New Floor Joists Loft

I am currently at the planning stage with my proposed loft conversion which i intend to carry out myself.

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. Purchase the type of lumber that matches the width of the existing joist. Measure the width and length of the existing joist. The best solution is to build a raised loft floor above the insulation details of which are shown below.

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. Structural engineer has specified 9x3s as the new floor in the loft. Clearing the loft area of all debris insulation struts and temporary boards to expose the.

If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists. I would really appreciate some advice on fitting some new joists for a 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. In the case of 2x6 joists you can pair them up with additional 2x6 joists by nailing them together side by side.

A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. This means that new floor joists are fitted alongside them slightly raised above the ceiling plasterboard to avoid contact with it. By flyingveepixie sun may 03 2009 10 09 am. I ve read previous posts on this topic but found conflicting views.

Furthermore squashing insulation down to fit joist height is a bad idea as this halves it s effectiveness doubling your heat loss. First off basic floor plan of the loft. I plan to leave the old joists in and sister them up. Total loft dimensions are 5 2m left to right 7m front to back.

How we install a new loft floor. Sistering is the process of adding a new joist next to each existing joist. I have plenty of trade experience as i am an electrician but am unsure of a couple of aspects regarding some of the.