Reinforcing Floor Joists For Loft Conversion

A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft.

Reinforcing floor joists for loft conversion.

How to reinforce an attic floor with sister joists. I suspect that the depth of the loft floor rafters are only 90mm. I want to finish this space with drywall walls and ceiling and also a drywall ceiling in the garage under the joists. Clear the joist spaces.

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. Each joist is connected by a vertical 2x4 to the roof rafter above it positioned about 4 from the wall. 6 loft conv rev 2 2007 support to loadbearing elements transferred from the roof partitions and the new floor. This means that new floor joists are fitted alongside them slightly raised above the ceiling plasterboard to avoid contact with it.

The loft room will also have to be separated by a fire door either at the top or bottom of the new stairs. 3 3 in the majority of instances the existing ceiling joist member will be inadequate for the imposed loadings from the new floor construction. The joists span 20 and are 16 on center. Loft conversions can i just lay loft boards down on my joists or will i need reinforcement on the joists.

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. 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. 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.