Garage Pad Question

RedLabel · #1 07-23-2015, 05:43 PM

What is the standard slope for a garage pad?

I'm having a house built right now with a front attached garage, so i expected the pad to slope away from the house, but when I looked at the freshly poured floor yesterday, it is slopes awfully aggressive! Also seems to slope to either side.

I'm going to go take my string level right now measure it for exact slope, but can you concrete guys tell me what the standard slope is for these garage pads?

From the looks of it I'll be chalking anything with wheels..

coreya3212 · #2 07-23-2015, 05:49 PM

Is this a driveway in front of your garage or the garage floor?

Raptor Boy · #3 07-23-2015, 05:54 PM

Think the best thing to own these days if building a new house or doing large Reno would be a laser level..... I am in building industry and can't believe what contractors/ builders get away with..... Hope you get it sorted out.....

CaberTosser · #4 07-23-2015, 05:57 PM

As simple a job as concrete is, it's amazing how many manage to eff it up. It should have some grade going towards the overhead door, and be level or slightly dished in the other plane so as to prevent water, snow and ice melt from running to the perimeter walls.

johnjohn · #5 07-23-2015, 06:13 PM

Slab is sloped approx 4" on 20'.... I think?

RedLabel · #6 07-23-2015, 06:13 PM

Yes there's a driveway/parking between my garage and the street, picture your typical front attached garage.

im guessing 6" drop over 20'

RedLabel · #7 07-23-2015, 06:14 PM

Quote:

Originally Posted by johnjohn

Slab is sloped approx 4" on 20'.... I think?

Caber' lending me his laser level so I'll put some pics up tomorrow night

Wrongside · #8 07-23-2015, 06:37 PM

Quote:

Originally Posted by johnjohn

Slab is sloped approx 4" on 20'.... I think?

Correct. Approx 2-3% grade is the norm for garage floors/pads- in the end of the industry I'm in anyways.

Wrongside · #9 07-23-2015, 06:41 PM

Quote:

Originally Posted by RedLabel

Caber' lending me his laser level so I'll put some pics up tomorrow night

Make sure his laser is not out by a mile. Those plumbers...

( I'm only kidding Caber! Nice gesture. )

Grizzly Adams · #10 07-23-2015, 07:14 PM

1/8 " / ft. is my guess, the required slope for decks, mine doubles as a shop, so it's level.

Grizz

Kootenayguy · #11 07-23-2015, 07:23 PM

Quote:

Originally Posted by RedLabel

What is the standard slope for a garage pad?

I'm having a house built right now with a front attached garage, so i expected the pad to slope away from the house, but when I looked at the freshly poured floor yesterday, it is slopes awfully aggressive! Also seems to slope to either side.

I'm going to go take my string level right now measure it for exact slope, but can you concrete guys tell me what the standard slope is for these garage pads?

From the looks of it I'll be chalking anything with wheels..

An inch for every ten feet of run is standard. I have poured more than 50 slabs.

Smokinyotes · #12 07-23-2015, 08:42 PM

My garage floor slopes 4" in 24'. My shop slopes 2" from the sides and ends to the sump in the center.

Wrongside · #13 07-23-2015, 09:16 PM

Quote:

Originally Posted by Kootenayguy

An inch for every ten feet of run is standard. I have poured more than 50 slabs.

I'm curious what part of the country you work in, Sir... BC still?

LKILR · #14 07-23-2015, 09:59 PM

I agree with kootenaguy one inch per ten feet is plenty of slope for any garage pad and it should be level sideways.

Kim473 · #15 07-24-2015, 06:25 AM

Most are pretty much level, A very slight slope to the big door and sloped from the sides to the center is good as water will run away from the walls and out the door.

4" in 24 ft is too much. JMO. For a driveway, yes but not the pad in the garage. Myself, I think about 2" in 24ft would be ok. I think mine is about 1" or less in 24ft and water runs ok away from things. Just my opinion.

buzzard · #16 07-24-2015, 06:42 AM

1/8" to the foot is more than enough. To a floor drain or sump. In 40 years of construction we never once [that I can remember] sloped to the door. Wood the door not freeze down?

Wrongside · #17 07-24-2015, 12:13 PM

Quote:

Originally Posted by buzzard

1/8" to the foot is more than enough. To a floor drain or sump. In 40 years of construction we never once [that I can remember] sloped to the door. Wood the door not freeze down?

Sloped to the doors is SOP on 90% + jobs around these parts.

We are building a 3500 sq ft custom home on a lake right now. The garage is 20' deep. From the plans...

johnjohn · #18 07-24-2015, 05:07 PM

Quote:

Originally Posted by Wrongside

Sloped to the doors is SOP on 90% + jobs around these parts.

We are building a 3500 sq ft custom home on a lake right now. The garage is 20' deep. From the plans...

Every house I frame says the same thing.

LKILR · #19 07-24-2015, 10:02 PM

You fellas need to use discretion the blueprint is not bible. Someone drew it up in an office like they were taught in school . If you slope a garage pad to the door and you bring lotsa snow in and it melts and goes to the door and its -40c outside what do you think will happen? It's common knowledge that they don't teach ya in school. No slope is best.

benamen · #20 07-24-2015, 11:33 PM

Neighbour needed a new dior after his froze down and the electric ooener buckled the door.

johnjohn · #21 07-25-2015, 05:59 AM

Quote:

Originally Posted by LKILR

You fellas need to use discretion the blueprint is not bible. Someone drew it up in an office like they were taught in school . If you slope a garage pad to the door and you bring lotsa snow in and it melts and goes to the door and its -40c outside what do you think will happen? It's common knowledge that they don't teach ya in school. No slope is best.

the pooling would be terrible. You'd have to salt the entire slab to keep it from being a skating rink. Many of the custom home builders have a centrally located drain now where the slab slopes in all directions towards the drain. If your garage is not heated sprinkle a bit of salt under door to prevent it from freezing. The standing water on a no slope floor would be awful shorten the life of the slab

LKILR · #22 07-25-2015, 06:48 AM

Floor drain is best. Salt will erode the surface of some types of concrete.

Wrongside · #23 07-25-2015, 05:19 PM

Quote:

Originally Posted by LKILR

You fellas need to use discretion the blueprint is not bible. Someone drew it up in an office like they were taught in school . If you slope a garage pad to the door and you bring lotsa snow in and it melts and goes to the door and its -40c outside what do you think will happen? It's common knowledge that they don't teach ya in school. No slope is best.

Ha. 'Discretion' like that would get you tied up in a lawsuit around here. I've seen several builders sued over way less...