garage subfloor

[inorkuo]

if there are any engineers in the house, any advice would be appreciated. my current garage setup allows me to pull the screen up, fold up the putting and hitting platforms against the wall and park cars inside. it takes about 10-15 minutes to do. i'm switching from protee to a portable launch monitor which means I don't need as tall of a platform. my plan is to make a 1 3/4" tall subfloor that will give me just enough height to drop in a few fiberbuilt panels. I want to build it sturdy enough to park to park cars on. that way I don't have to move anything to park cars in the garage.

I'm thinking, lay down a plastic vapor barrier on top of the concrete. then use 3/4" plywood on top of 1x6 lumber with carpet squares on top. I want to cut the 1x6's into 5.5x5.5x3/4 blocks and space them out under the plywood as close as needed to support the weight of 2 cars. The questions are how much spacing is necessary? 6" spacing? overkill? not strong enough? I really have no idea. also, do I need pressure treated lumber and marine grade plywood? maybe pressure treated underneath and regular plywood, or just regular wood for all of it?

[Thinman]

i think you are over thinking it. i would invest in the fiberbuilt rubber mat since you already like(?) the panels, cover it with something to save it from oil and park away.

[aeroburner]

inor send me a pic of your space, you live in NC correct. Remember that you will have a 2% slope out of your garage and what will happen when you pull your cars in during a rain spell dirt to ball transfer then to impact screen. anything is possible but put a sketch together and let me see what can be done. you have my cell and email already if you want to text this or email also

[Boo Radley]

I use one of these to hold snow, rain etc and keep a nice warm car for the winter..... Auto Floor Guard containment mat I can pull the car in without hving to move any of my golf sim.

[inorkuo]

You guys are no fun. I was getting excited about building something...brought up some good points though. Thanks for the input.

[Gsmith824]

if there are any engineers in the house, any advice would be appreciated. my current garage setup allows me to pull the screen up, fold up the putting and hitting platforms against the wall and park cars inside. it takes about 10-15 minutes to do. i'm switching from protee to a portable launch monitor which means I don't need as tall of a platform. my plan is to make a 1 3/4" tall subfloor that will give me just enough height to drop in a few fiberbuilt panels. I want to build it sturdy enough to park to park cars on. that way I don't have to move anything to park cars in the garage.

I'm thinking, lay down a plastic vapor barrier on top of the concrete. then use 3/4" plywood on top of 1x6 lumber with carpet squares on top. I want to cut the 1x6's into 5.5x5.5x3/4 blocks and space them out under the plywood as close as needed to support the weight of 2 cars. The questions are how much spacing is necessary? 6" spacing? overkill? not strong enough? I really have no idea. also, do I need pressure treated lumber and marine grade plywood? maybe pressure treated underneath and regular plywood, or just regular wood for all of it?

Did you ever end up building this out? I'm struggling with the same decisions right now...Build up sub-floor with plywood and 1x and insert a mat. Bigger concern is rot with Chicago weather. Hoping you might have some advice.

Thanks!

[Brettster]

inorkuo and Gsmith824 - I did something similar to build my subfloor, but it was in my Shed, and not a garage - so I did not have the concerns of driving a heavy vehicle over it, etc. Maybe you can find some inspiration from how I did it, as I used 2x4s lying down on their sides (with Foamular insulation foam laid between it) and then 3/4" plywood underlayment over the top of that. Of course, you would have to space them much closer together to handle heavy weight.

You can see pics of my build, especially of the floor at this post:

https://golfsimulatorforum.com/forum/golf-simulator-forum/simulator-builds/348365-golf-sim-shed-build-finally?p=351602#post351602

Good luck!
-Brett