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Old 03-18-2019, 11:57 AM   #31
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Re: Reconstructing Driveway to Create Flat Area


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Originally Posted by fusebox7 View Post
Does 4% sound like too much grade for a "flat" area? I've read that 2% is the minimum recommendation but is doubling that overdoing it?
The short answer is yes. The long answer I have two opinions.

The pro opinion sets grades given a puzzle with many variables which usually arrives at the minimal solution acceptable for the general public and governing authority (the wall height matters).

The personal opinion is derived from my own varied-slope driveway (used by lots of kids, car projects, carpentry, and such).
2%@20' at the garage - way too steep for kids play or my use
8%@20' entrance from street - max steep in winter to get up with summer tires

If you're spending upwards of $60K with the most important variable being an area for the kids, your personal enjoyment should dictate and go for as flat as you can without impeding water flow.
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Old 03-18-2019, 12:07 PM   #32
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Re: Reconstructing Driveway to Create Flat Area


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Originally Posted by 3onthetree View Post
The short answer is yes. The long answer I have two opinions.

The pro opinion sets grades given a puzzle with many variables which usually arrives at the minimal solution acceptable for the general public and governing authority (the wall height matters).

The personal opinion is derived from my own varied-slope driveway (used by lots of kids, car projects, carpentry, and such).
2%@20' at the garage - way too steep for kids play or my use
8%@20' entrance from street - max steep in winter to get up with summer tires

If you're spending upwards of $60K with the most important variable being an area for the kids, your personal enjoyment should dictate and go for as flat as you can without impeding water flow.
Interesting take. I didn't expect that response but if you make it extremely "flat" (less than 2% in your case) wouldn't you need additional drainage to avoid pooling of water?
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Old 03-18-2019, 12:33 PM   #33
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Re: Reconstructing Driveway to Create Flat Area


1% flows
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Old 03-18-2019, 12:36 PM   #34
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Re: Reconstructing Driveway to Create Flat Area


Have you found areas like the mall parking lots that are 2 or 4% so you know what that would look and feel like?
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Old 03-18-2019, 01:33 PM   #35
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Re: Reconstructing Driveway to Create Flat Area


I know builders who work backwards from a 1% driveway to set the top of foundation - it usually winds up less than 1%. Water won't move much solids, but will flow slowly. I would say the closer to level the more important haunches and grade being below the edges becomes.

I'm not recommending less than 2%, just giving an opinion for you to weigh.
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Old 03-18-2019, 01:40 PM   #36
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Re: Reconstructing Driveway to Create Flat Area


The sidewalk on our lot varies from 2-4% and it seems reasonable but like you've said, if we're going through the trouble, might as well go flat as possible. Assuming there won't be drainage issues I would absolutely prefer "Basketball court flat".
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Old 04-03-2019, 01:27 PM   #37
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Re: Reconstructing Driveway to Create Flat Area


I would check to see if there is enough space to put in concrete steps that parallel the driveway to allow people to walk up them. Not unusual to see homes with steep driveways where the steps are in the very center going up to a home. A width of 24 inches is adequate and a tread depth of 11" or more with maximum riser height of 6 inches is very easy to navigate.

For the garage I would put down a length of rubber garage door weather strip as this will be high enough to prevent toys from rolling down to the driveway.

I have a similar driveway and even with a very rough surface finish it is still slippery and with my pickup truck I need to put it into 4WD to not spin the tires and leave rubber on the concrete.

I created a secondary parking area with the driveway as a Y to the right and this provided a flat space for parking outside of the garage. I added a pad on the other side of the garage as well for even more flat parking area.
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Old 04-22-2019, 11:57 PM   #38
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Re: Reconstructing Driveway to Create Flat Area


Hi, I'm new here. :-) Saw the pics you've shared. What a quite big driveway project you've got. Good luck on that.

Cheers,
Nek from Las Vegas Garage Door Repair
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