It is made much easier by the production of special loft panel flooring.
How to put floor joists in loft.
How to lay loft boards for loft flooring.
Most roofs are constructed with internal support struts in the loft propping up the rafters and purlins horizontal roof beams in traditional cut and pitched roofs and making up the web of braces in modern trussed rafter roofs.
But larger is not always better when builders are constructing a home or adding a room addition.
These panels are 18mm thick 1 2m long and only 320mm wide.
The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.
How we install a new loft floor.
If the board overhangs mark it at the centre of the last joist it crosses and make a straight cut at this point with a jigsaw.
Altering the roof structure floor joists.
For most jobs 2 in 5 1 cm x 10 in 25 cm boards are an ideal size.
Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.
To put a floor in your loft is not a difficult job.
This allows the board that will butt up to its end to be supported by the joist.
You ll use the same size lumber to assemble the rim joists as you will for the main floor joists.
A new floor system is installed using a frame trimmer joists to support the floor joists that span the width of the loft.
Total loft dimensions are 5 2m left to right 7m front to back.
If you intend to board directly on to the joists instead of having a raise floor then start by placing the first board across the joists.
First off basic floor plan of the loft.
The rim joist sits vertically on top of the sill plate along the outside of the frame to create a lip for the main floor joists.
A basic floor system is installed in about 10 stages from preparation to boarding the floor.