Cutting Floor Joists For Shower

Tradespeople often need to cut notches or holes in floor and ceiling joists to run pipes ductwork or wires.

Cutting floor joists for shower.

Cutting from the joist height has always been and is a sensitive issue. Note the photos show a recent bathroom remodel where we relocated the tub drain across several floor joists. Also all that mud and tile plus showering people are heavy and the extra support would be good to have. The floor system is 2 10 joists spaced 12 inches on center.

Tap a nail into the joist to keep it from moving around. If the cut outs are too large or in the wrong location the joist can be weakened and unable to support the load it was designed for. If it were my house besides the sistering mentioned above i would also add a 6 inch deep joist between each cut down joist to cut the span in half. The joist was encased in spray foam so it was invisable to the home inspection we had done.

I m working on installing a walk in shower for the first time and i ve seen differing ways of waterproofing the floor. Fine homebuilding with jim anderson demonstrates how to cut floor joists to length. Prior to drilling holes in these floor joists we installed 3 4 inch plywood to each one. Sometimes joists are notched at the end where they bear on a wall or sill.

As this is half the joist i need to re support the joist and i planned to sister the joist with another 50mm by 50mm and also add trimmers for extra support. Recently when replacing a cracked 36x60 fiberglass shower i discovered the plumber had cut 4 inches out the top chord and field of the tji floor joist. It s cheap insurance against future cracking of the mud job and tiles. The joist size is 100mm by 50mm and i need to cut it to 50mm by 50mm.

In this case the bathroom floor framing there cannot be the danger of a structural catastrophe but instead we may have to deal with an excessive deflection. Inspect the rim line to know where to set the joists. This was the likely cause of the crack in this shower pan in a house only 5 years old when we bought it. The best in my mind is dropping 3 of joist and pouring the pan over rubber membrane.

Add 1 8 inch of additional length so you can fit. Then use pry bars and your reciprocating saw to pry and cut the floor joist away from the subfloor. Measure the distance between the joists flanking the joist to be cut typically between 30 and 31 inches in joists installed 16 inches on center. I want to make a walk in shower and i need to cut into the floor joists so the fall and mortar bed can be built.

We cut out and doubled up a header where the tub p trap was to be installed. This will create a weak spot. So the only solution is to cut a few inches from the existing joist tops. Resizing joists for walk in shower.

Line the chalk line up with the rim line and snap the line. Pry the floor joist from the subfloor with the back of your hammer.