I live in a typical suburb with typical zoning, if I were to build a
new detached garage, could I save money by having a gravel floor ?
The perimeter would be concrete of course.
It seems like it would be little different, functionally. Or am I
No significant cost savings, and increased chance of frost heave for the
poured footers and foundation stub walls, due to water ponding and
freezing against them. I'd skimp on the driveway, instead.
I would not have a gravel garage floor, no way. Poured concrete is
just easier for auto repair work and much easier to keep clean. Epoxy
clear coat on concrete seals and protects. A smooth concrete floor
makes it easy to see any auto fluid leaks. Gravel is ok for the
driveway, but again, concrete or even asphalt is better.
Our detached was gravel for many years. Dad had planned the poured floor,
so the doors and everything were set for a slab, and temporary extensions
were bolted on the bottom of the OH doors. The slab did finally come later.
Shouldn't be a problem with water pooling . It doesn't rain inside a
garage. And it'll heave whether or not it's a concrete slab.
the extra moisture coming from the gravel can cause your vehicle to
rust out from below....
costs way more than difference if any in taxes.
a old aquitance built a garage with no footer and no garage doors.
the 2 1/2 bay garage moved with the seasons, people ripped off
anything he put in garage, nice secluded place to steal from.
he died his wdow spent tons of money having a footer excavated and
installed along with a garage doors.
plus at home resale no floor = no garage........ years from now
pouring flooor will no doubt cost more,
yours a creative but altogether bad idea, sorry
Don't know where the OP lives, but what happens if salt filled snow
melts off the car and drains down onto the water barrier?
If it froze again would that be an issue? If it doesn't freeze and
just sits there, would that be an issue?
I don't know if it'll be a problem, I'm just bringing it up.
Only one problem. The cold gravel floor causes condensation when warm
damp air contacts it, the moisture drops through the stone to the
vapour barier, and cannot get away. Earth warms up a bit -
becomeswarmer than the air above, moisture leaves and condenses on the
cold car above. Said cold car has a dusting of salt, and the rust
monster is definitely off and running.
If you are going to have a non-hard-surfaced garage floor you want a
well drained and tiled foundation, with a good coarse granular fill,
covered with a good foot of clean crushed stone, which will drain and
keep things dry, or crushed stone covered with a thick, well tamped
layer of limestone fines. The fines, when compacted damp, become
ALMOST concrete.(and make a good base for a concrete floor in the
If I ever build another garage it will have a re-enforced concrete
floor over about 4 inches(minimum) of high density foam board, and it
will have a central floor drain to catch any melt/runnoff. No more of
this "sloped towards the door" (roughly) that leaves puddles in the
Ya think maybe it was because the "garage" (actually a carport) had no
doors, and the stupid old fart kept putting valuable things in there?
I really don't think it had anything to do with the lack of a floor.
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