Add Bridging Attic Joist

Then measure the span of the joists the distance between walls or beams that support the joists.

Add bridging attic joist.

Yet it is not uncommon to find bridging not properly installed or missing all together. Once the structure has passed the building inspection you can run electrical plumbing and mechanical lines and insulation as applicable then install plywood subflooring. Divide the span by three and add rows of bridging at both of the one third points. Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.

Cut and install lumber blocking or bridging between the joists if required by local code. Put 2x8 blocks at the third points set at the midheight of the assembly and bridging the horizontal joint between top and bottom joists. If the existing joist system is very close to being sufficient to support a new attic flooring the addition of bridging between the joists may be all that s required. Installing flooring material over the attic doesn t quite leave room for the recommended insulation space needed to provide efficient home energy.

Attic hatch or door. Pull down stair or ladder. Attach the bridging fasten metal bridging with 1 3 8 in. Purchase the type of lumber that matches the width of the existing joist.

Measure the width and length of the existing joist. Start by making sure the original bridging is tightly fastened. Toenail the blocks or end nail through the joists to tie everything together. Affix rigid foam insulation to the attic side of the hatch or door.

Each piece of bridging requires four nails two at each end. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. Add nails or screws if necessary. What i would do is to add a 2 4 to the top and bottom of each joist using glue and structural screws to convert each joist into an i joist in place piffin writes.

Most new construction uses 2 by 8 lumber for joists although 2 by 6. A raised platform of lumber in dimensions of 2 4 or 2 6 with insulation placed between joists and covered up with a 12 inch plywood helps build the right flooring. Bridging or x bracing allows joists to share weight.