Minimum Slope For Garage Floor

Use 1 4 to 1 8 per foot slope to the drains and you will not have a problem.

Minimum slope for garage floor.

They are available in pdf format and can be used for own project of building a garage. It is usually 1 8 to 1 4 per foot. The recommended slope for flat roofs is usually 1 1 8 inch per foot or 2 1 4 inch per foot according to the professional handbook of building construction published by john wiley sons new york. Fyi having a wash machine in the garage is probably more or less exclusive to the deep south.

On a 20 deep garage concrete sloping toward the big door that would be 5 and 6 on a 24 deep garage. This will add cost but if you will have a lot of snow and ice melting off the cars you might want to put a couple of drains in the middle of each bay. Here is the citation from the international residential code irc. Of course we don t have to deal with heavy snow etc.

Here a more typical slope would be 2 5 or 3. The building code requires that a garage floor be sloped towards the door but does not specify a minimum slope. Then the garage slab slopes to the big garage door maybe 2 5. 1 4 over 4 feet will drain but slowly much over that and front to rear on a 28 to 30 foot garage is becomes noticeable.

We could find no reference to recommended slopes when trench drains are used in a floor. I mean you can add an additional layer of material to the garage floor and slope garage floor from high to low. 1 4 a foot is a lot. In the winter the runoff from whatever snow is on it just pools on the floor in the garage.

Garagetips 101 offers at a nominal price a set of single car garage plans 12 x 24 consisting of 6 sheets of drawings on 11 x 17 sheet sizes with details that show how the floor slope in the type 1 garage foundation is accomplished.