Attic Joists Bathroom

Joists of 2x8s or larger are able to support more weight.

Attic joists bathroom.

Dumping bathroom exhaust into an attic or under roof space invites costly mold contamination frost under the roof in freezing climates moisture damage to roof sheathing possibly even plywood delamination or rot roof failures and shorter roof shingle life. Sistering installing new larger joists next to the existing ones is one way to bring your attic floor up to code. Unless you re using mineral wool insulation or your fixtures are rated safe for contact with any type of insulation don t allow the material to touch or cover recessed cans or lights from the floor below it s a fire hazard. 1 2 inch or 3 4 inch thick a c graded plywood floor covering such as luxury vinyl plank two by fours water resistant drywall drywall screws drywall compound and sanding sheets bathroom vanity and sink bathtub optional bathtub shower direct to stud surround kit.

Box out light fixtures. Attics that have no flooring unless expressly built so an attic s joists are meant for carrying the load of the ceiling below and related elements collectively known as the dead load. When adding a bathroom to adjoin your attic bedroom make sure the floor joists can support the weight of your bathroom fixtures. The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation.

Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. Positioning the new joist adjacent to the existing preserves precious ceiling but it does come with some potential complications. Inspect the space for storage more the load anticipated sturdier should be the attic flooring. Position bathroom vent fans so the ducts can run parallel to the joists right up to where they exit the house.

Joists that are only 2x4s may not be hardy enough to bear too much weight. Inch or inch plywood for subflooring 2x4s for flooring support and walls floor covering drywall sheets drywall screws 14 gauge and 12 gauge electrical wiring gfci outlets plumbing supply lines and. Often existing joist bays are filled with electrical and heating ducts that will need to be relocated. Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches.

For 2x6s joists you can get away with some relatively light stuff. Tools and supplies toilet subfloor. You ll need quite a few different tools and supplies to pull off your new attic bathroom project.