Lay a sub floor if necessary.
Unfinished attic joist.
The type of modifications selected for reinforcing the joists will depend on the recommendations of the engineer but the following methods are commonly used to beef up undersized attic joists.
How to strengthen floor joists before finishing an attic attics that have no flooring.
A single 4 pack covers approximately 10 sq.
Screw down into joists at 3 foot 0 91 m 91 44 cm intervals using wood screws.
Attics with existing flooring.
Alternatively your attic may already have some sort of floor but this doesn t.
If the existing joist system is very close to being sufficient to support a new attic flooring.
Attic flooring panels are easy to install with their interlocking edges.
Cut sub floor panels to the appropriate size and install them over the joist beams.
Most attics will need a sub floor to be laid that you can build on top of.
If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.
1a attic access door 2.
In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below.
The safest way to move around an unfinished attic is to create a catwalk or walking platform by attaching some 1x6 or 1x8 boards or strips of 3 4 plywood to the joists with screws don t use nails because the hammering might disturb the drywall or plaster ceiling below.