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birdball32
Poor drainage in front of garage door

During heavy rains, my driveway (which is slanted downward towards the garage) acts like a giant waterslide and we get rather large pools of water that sit in front of the garage door.... until we open it, then it flows right into the garage itself. Does anyone have suggestions for diverting this massive deluge of water?

A. Spruce
Re: Poor drainage in front of garage door

Install a drain or channel to direct the water around the house. I had the same problem with all the doors on my detached garage. The driveway slopes towards the door and the contractor that poured the side walks poured it above and sloped toward the threshold of the doors. For the driveway I cut a 4" channel and installed perf tube and gravel. For the two side doors I've cut the walkway back and installed Decodrain and repoured the concrete around the drain.

Tony
Re: Poor drainage in front of garage door
birdball32 wrote:

During heavy rains, my driveway (which is slanted downward towards the garage) acts like a giant waterslide and we get rather large pools of water that sit in front of the garage door.... until we open it, then it flows right into the garage itself. Does anyone have suggestions for diverting this massive deluge of water?

I agree with ASpruce, a trough along the front of the doors and carry the water around to the back of the building. The drain he is talking about has "fall" built into it, so you install it according to the instructions and you will be fine.

Calcats ;)

birdball32
Re: Poor drainage in front of garage door

Great ideas... thanks guys. Any idea what an acceptable slope to build in would be in order for the water to flow to the proper side of the house? Would it be similar to the recommended slope for a gutter?

Also, if I go the perf tube/gravel route... will that affect my snowblowing the driveway in the winter? I'd like to avoid tossing gravel all around the yard if at all possible.

Tony
Re: Poor drainage in front of garage door

Let me try to clarify for you. you dig the trench, put the decodrain in with re-bar pieces (drain is already formed out of fiberglass, and has "fall" built into it). Put 2 inches of 2b stone around it, then pour the concrete around the drain, level with the trench. The drain has a connector at the end to hook to flexible pipe to go around the building. There won't be any stone for you to throw around. Go to a homecenter and look at the drain and you will understand. You could also look it up on TOH items seen on the shows!! Good Luck. Come back with any questions.

Calcats ;)

A. Spruce
Re: Poor drainage in front of garage door

The decodrain can be level to 1/4" per foot pitch, the drain that it hooks into should have a minimum of 1/8" fall, a 1/4" or more is preferred. To install it, use a packed stone or cement base, set the drain as desired, then fill in around the drain with concrete and finish to match surrounding areas. Not sure I would recommend it if you're prone to freezing because the drain would likely plug and you'd continue to have the same problem of water in the garage.

As to going across the roll up door, I would opt for installing a trough (depression in the concrete ) or a drain channel that is rated for vehicle weight. I would think that the trough would be better so that it could easily be cleared during snow and ice season. There are two ways to go about this, one would be to cut a section out of the driveway and repour it with the trough, the other would be to consult with a concrete cutting company to see if they could grind a trough for you. It wouldn't have to be that deep.

Re: Poor drainage in front of garage door

It does not sound practical because even if you leveled off a section of the drive, there will still be a steep section coming down from the street, and water would continue to gush down the driveway and inundate the garage if the drain is not working. So, unless I am missing something, you will have to continue to unclog that drain as soon as it silts up.

Tony
Re: Poor drainage in front of garage door
calcats wrote:

Let me try to clarify for you. you dig the trench, put the decodrain in with re-bar pieces (drain is already formed out of fiberglass, and has "fall" built into it). Put 2 inches of 2b stone around it, then pour the concrete around the drain, level with the trench. The drain has a connector at the end to hook to flexible pipe to go around the building. There won't be any stone for you to throw around. Go to a homecenter and look at the drain and you will understand. You could also look it up on TOH items seen on the shows!! Good Luck. Come back with any questions.

Calcats ;)

The drain I am thinking of already has fall built into it so you just put it in level, and it is rated for driveway traffic. Using the preformed trough is much easier than digging and forming a concrete trough especially when you are going to get the same end result. As far as freezing and cleaning out leaves and silt, put a screen (fiberglass mesh used in screen doors) in front of the exit pipe. This will contain all that needs cleaned out into the trough. The freezing, leaves etc. are going to happen no matter if you use the pre-formed trough or make one out of concrete, just clean it out when necessary. I've done plenty of the concrete formed troughs and it is easier to use the pre-formed to the same end. Get a good cement contractor to give you a price on a trough, It is not a big job for them. Good Luck!!
Calcats ;)

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