Reinforcing Floor Joists For Loft Conversion

A basic floor system is installed in about 10 stages from preparation to boarding the floor.

Reinforcing floor joists for loft conversion.

Each joist is connected by a vertical 2x4 to the roof rafter above it positioned about 4 from the wall. A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft. I want to finish this space with drywall walls and ceiling and also a drywall ceiling in the garage under the joists. So i m moving into a new property soon and i m looking at making use of the loft as it s a pretty decent size and i need a place for a workshop activities room.

The joists span 20 and are 16 on center. Pull out all insulation and any debris from all of the joist spaces so you can see the full length of each joist including where it meets the exterior walls. 6 loft conv rev 2 2007 support to loadbearing elements transferred from the roof partitions and the new floor. The new floor joists of your loft conversion will need to offer at least 30 minutes worth of fire protection which could mean replastering the ceilings in those first floor rooms below.

Clear the joist spaces. I suspect that the depth of the loft floor rafters are only 90mm. The loft room will also have to be separated by a fire door either at the top or bottom of the new stairs. There is a 1 2 plywood sub floor on top of the joists.

3 3 in the majority of instances the existing ceiling joist member will be inadequate for the imposed loadings from the new floor construction. This means that new floor joists are fitted alongside them slightly raised above the ceiling plasterboard to avoid contact with it. Clearing the loft area of all debris insulation struts and temporary boards to expose the ceiling boards. Also remove any blocking or bridging between the joists as applicable.