In smaller lofts it is often the case that the floor joists themselves will be used to support the sloping rafters.
How to fit floor joists in a loft.
Set up a temporary work platform on a piece of board set across the ceiling joists it is safer and more comfortable than trusting your balance measure the area you plan to board out multiply the width of the loft by its length.
A basic floor system is installed in about 10 stages from preparation to boarding the floor.
Trimmer joists form the periphery of the new floor.
The strong timbers approx 225mm x 75mm timber are secured to the wall plates brickwork and bolted to the walls.
With the supporting ashlering in place the internal struts and braces can now safely be removed.
Take measurements in metres this makes it easier when you are buying boards.
This is possible by constructing a dwarf timber stud wall 1m to 1 5m high known as an ashlering between the two.