Re: Plywood Over Concrete Slab All the homes I've worked in the guys installing the finish floor put the subfloor down. Jesse, I would just do it exactly the way it is spec'd to you, to the ''T''
Lay 6-mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring. Then fasten 3/4-in. treated plywood to the concrete with concrete screws spaced every 16 in. Alternatively, screw rows of treated 1x4s to the concrete 16 in. on center.
This can be a integrally colored micro-topping or one you can stain or dye, a stamped concrete overlay, a decorative epoxy, or just about any other type of decorative finish you desire. Stamped Overlay Installed Over Plywood Sub-Floor
If your center beam is supported by columns I can't see why the floor couldn't support the weight of the concrete. I would however, be worried about undesirable reactions between the curing concrete and the top of the plywood subfloor.
1) If you put the plywood right on the concrete, it will rot. Concrete will wick moisture out of the ground into the wood. You need a vapour barrier in-between. 2) Consider using something like a Dricore panel and leveling kits. 3) If you are fastening to concrete, you might want to consider a ramset tool.
The concrete pad creates a functional patio, but over time can become stained, cracked, or just plain boring. Give your space a fresh look with a new layer of pavers.
Plywood Substrate in a kitchen. Metal lath stapled over plywood substrate. The installation of calcium aluminate cement based self-leveling concrete, Param 5500 along with expanded metal lath for reinforcement is a successful fast-track method to convert a plywood subfloor into a beautiful concrete floor.
If you are looking for the beauty and personalization available in decorative concrete flooring, you can absolutely achieve this look with an installation over your plywood sub-floor without any compromises in quality.
Question: We have experience resurfacing concrete with microtoppings and polymer overlays, and we are now just starting to do this process over wood—either interior floors or upper-level patios that do not have enough clearance for concrete.
According to several paver manufacturers, paving blocks can be installed on top of concrete without mortar if you first lay down a 1/2″ to 1” bed of coarse sand. The process is nearly identical to laying a paver patio over ground .
Concrete floor video on how to install concrete over an existing wood subfloor. It's best to place the underlayment over 3/4-inch-thick plywood fastened with screws at 12- to 16-inch intervals to help decrease deflection and add stability.
For a highly uneven surface, place an underlayment, such as plywood or cement board, over the subfloor. Measuring Before purchasing your pavers, calculate the square footage of the rooms where you want to lay the brick floors.
If you’re installing plywood over an existing dry concrete floor, you shouldn’t have any problem. However, a new concrete floor contains a lot of moisture . So, you need to allow it to cure for at least 60 days before even bothering to check the moisture level.
Then fasten 3/4-in. treated plywood to the concrete with concrete screws spaced every 16 in. Alternatively, screw rows of treated 1x4s to the concrete 16 in. on center. Lay the 1x4s perpendicular to the direction you intend to install the floor planks.
I overheard a mason say that you never want to put a stone floor with mortar or concrete directly onto a plywood sub. You always use backer board first.
While you can lay tile directly over a concrete slab using thin-set adhesive, don’t make the mistake of applying tile directly to a plywood subfloor. No matter how firm the subfloor; the plywood will expand and contract at a different rate as the tile, causing cracks to develop in the grout lines or tiles over time.
Re: Should I Put A Membrane Between The Concrete Topping Over Plywood Subfloor I'm working in a Condo right now that was built in 1989 with standard wood not PT with a 1.5" gypcrete floor and it has no problems with any kind of wood decay from the gypcrete.
Don't glue the plywood to the concrete. Concrete has moisture in it and your wood will mold and rot over time. There is a product you can buy from your local store for putting under a floor over concrete.