How To Install A Bathroom In A Concrete Basement Floor

During new construction the builder installs drain lines and stubs that will connect to future plumbing fixtures before he pours the slab on grade.

How to install a bathroom in a concrete basement floor.

Sketch the new design in place if possible fine tune the design and then finalize the plan. In order to add a bathroom to a house on a concrete slab you will need to locate the existing water supply and waste lines. The most efficient and least expensive method of installing a basement shower without the need to break concrete is to install it over existing plumbing stub outs. Locate the main drain.

The ideal way to put down a wood floor over concrete that is subject to dampness is to first put down pressure 2 by 4 inch sleepers or lengths of wood on the floor that are spaced 16 inches apart on center. Cover the sleepers with 6 millimeter plastic and then lay down 5 8 inch plywood. Connect the basement bathroom plumbing to the existing drain and vent lines in the floor and ceiling to complete the rough in plumbing. Work the compound into cracks with a putty.

Plumbing stub outs may already be available in some basements which makes breaking up the concrete floor unnecessary. Find the main drain line photo 1. Then design a bathroom layout that will function properly with the existing plumbing plan or with limited modification. Adding additional plumbing fixtures to your basement bathroom may require the same prep and excavation as adding a toilet.

Add enough water to make the compound the consistency of pancakes. This limits your ability to change the basement layout but if the stub outs are in place using them will save money and labor. How to cut a concrete floor for new plumbing. Mix portland cement based floor leveling compound according to package directions.