Add Pitch To Concrete Floor

Two key measurements determine the pitch of a concrete surface.

Add pitch to concrete floor.

A 4 foot wide concrete walkway that runs parallel to a house should drop one inch away from the home. Follow the manufacturer s instructions to mix the tsp powder with water into a paste. This is going to be the highest point of the floor when applying the mixture. The surface length and the change in height over the length.

If too much water is lost into the old concrete there will not be enough water to hydrate all of the cement particles and a lower strength material will be the result. Measure the distance from the lowest point of the concrete floor to the perimeter and add 1 4 inch for every foot. Create a screed along one wall. If it s running perpendicular to a structure follow the one quarter inch pitch for every foot of length rule.

So a typical 10 foot slab should have 2 5 inches height difference at one end to the other. Just rib out the osb rip some lengths of spruce 2x4 or 2x6 to give you the slope you want. If commercial cleaners and tsp don t work you may need to get muriatic acid. This is a curb of packed concrete 3 to 4 inches wide running the length of a perimeter wall.

The general rule of thumb for a proper slope is that concrete should have a 1 4 inch drop for every foot of length. Try mixing about 1 fl oz 30 ml per 125 fl oz 3 7 ml of water. If you want a steeper slope take this into account and add more to each foot to achieve your goal. Concrete simply will not bond to all substances.

In addition some concretes are quite porous and will rob water from your repair material. When these are expressed as a ratio such as 1 25 it means that the slope varies by one unit of height across 25 units of length. Just make these tapered cuts so that the minimum thickness is approximately 1. This will ensure water isn t an unwelcome guest at your front door.

Shovel a layer into the floor space along your outer perimeter.