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Posted by bertbarndoor on October 16, 2008, 4:00 pm
Hi, I have a backyard detached garage that I would like an interlock
patio to serve as a drive way entrance to the garage. So basically, it
will serve as a patio once the cars are in the garage. At my old house
I used to have an interlock walkway which sank over the years... I'd
like to prevent that if possible. Also, adding to the issue is one end
of the patio/entrance to the garage has to be graded up an additional
8 inches or so and then gradually smoothed around that area (as the
driveway slopes away from the garage at a right angle.
Anyhow, my question is this....could a layer of concrete be used under
the patio (before the sand and gravel etc..,) to prevent the stones or
pavers from sinking over time? I am concerned that by driving the cars
over the patio, as well as the part of the patio that has to be graded
up to accommodate the slope, will all result in sinkage over time.
Related...can I treat the stones with anything like watersealer to
prevent stains from cars should anything ever leak? Thanks.
-Rob
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Posted by jloomis on October 16, 2008, 11:31 pm
I would use compact road base and level it........I mean level
it............with string line or laser level to under an inch.....then use
sand for final grading.
wet and pack.....
you may need a compactor and do the gravel in lifts.....with water
sparingly.
Some have mixed concrete with sand and then wet it........for a 99%
compaction.......
Concrete will work, and the sand needs to be used for the leveler.....wet
sand.
A clear sealer may help with stains.....acrylic sealer.....
jloomis
> Hi, I have a backyard detached garage that I would like an interlock
> patio to serve as a drive way entrance to the garage. So basically, it
> will serve as a patio once the cars are in the garage. At my old house
> I used to have an interlock walkway which sank over the years... I'd
> like to prevent that if possible. Also, adding to the issue is one end
> of the patio/entrance to the garage has to be graded up an additional
> 8 inches or so and then gradually smoothed around that area (as the
> driveway slopes away from the garage at a right angle.
> Anyhow, my question is this....could a layer of concrete be used under
> the patio (before the sand and gravel etc..,) to prevent the stones or
> pavers from sinking over time? I am concerned that by driving the cars
> over the patio, as well as the part of the patio that has to be graded
> up to accommodate the slope, will all result in sinkage over time.
> Related...can I treat the stones with anything like watersealer to
> prevent stains from cars should anything ever leak? Thanks.
> -Rob
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Posted by John Grabowski on October 18, 2008, 4:18 pm
> Hi, I have a backyard detached garage that I would like an interlock
> patio to serve as a drive way entrance to the garage. So basically, it
> will serve as a patio once the cars are in the garage. At my old house
> I used to have an interlock walkway which sank over the years... I'd
> like to prevent that if possible. Also, adding to the issue is one end
> of the patio/entrance to the garage has to be graded up an additional
> 8 inches or so and then gradually smoothed around that area (as the
> driveway slopes away from the garage at a right angle.
> Anyhow, my question is this....could a layer of concrete be used under
> the patio (before the sand and gravel etc..,) to prevent the stones or
> pavers from sinking over time? I am concerned that by driving the cars
> over the patio, as well as the part of the patio that has to be graded
> up to accommodate the slope, will all result in sinkage over time.
> Related...can I treat the stones with anything like watersealer to
> prevent stains from cars should anything ever leak? Thanks.
*I'm not an expert on this, but from what I have heard concrete under pavers
is not the way to go. Many years ago an office building that I was working
on was having pavers installed that would support cars. The installers were
using something that looked like asphalt as a base. You should try
contacting the manufacturer or looking online to see what specifications
there may be for supporting a car load.
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> patio to serve as a drive way entrance to the garage. So basically, it
> will serve as a patio once the cars are in the garage. At my old house
> I used to have an interlock walkway which sank over the years... I'd
> like to prevent that if possible. Also, adding to the issue is one end
> of the patio/entrance to the garage has to be graded up an additional
> 8 inches or so and then gradually smoothed around that area (as the
> driveway slopes away from the garage at a right angle.
> Anyhow, my question is this....could a layer of concrete be used under
> the patio (before the sand and gravel etc..,) to prevent the stones or
> pavers from sinking over time? I am concerned that by driving the cars
> over the patio, as well as the part of the patio that has to be graded
> up to accommodate the slope, will all result in sinkage over time.
> Related...can I treat the stones with anything like watersealer to
> prevent stains from cars should anything ever leak? Thanks.
> -Rob