How can I properly install plywood subfloor for a mudroom conversion without compromising the vapor layer?
Asked by Caridad Vela 
4 months ago
Last Updated: June 2, 2024
Could someone help me out with this question? I’m in the process of turning my 7’x15′ closed porch into a mudroom. Currently, there’s laminate flooring over a concrete slab that I’ll be removing. I’ve been doing some research and it looks like people typically screw the subfloor to the concrete slab. But wouldn’t that mess up the vapor barrier? Would it work better to just glue the plywood together instead of screwing it in? Thanks in advance for any advice! 🙂
It’s all about YouTube here!
Have you met Matt Risinger? He’s basically a pro when it comes to building houses.
Why does it matter anyway? Just getting started with wood preservation on the outside of buildings (definitely not pressure-treated 😂)
University: the go-to for outdated info in a field. YouTube, on the other hand, keeps up with active professionals and industry changes.
Thanks! I think I’ll go with two layers of plywood 🙂
This is how misinformation spreads – suggesting drinking Javex to treat Covid. Let’s put an end to it.
Trying to tap into the mind of a madman. I’ll leave that to the experts. I’ve never relied on YouTube, oogle, or TikTok for technical details. I advise against it. No editing involved! 😊
It stays in place and provides a surface to secure things to. It’s a smart approach. The initial layer isn’t connected to the base, but the second layer is connected to the first.
No experience needed to start your own channel.
The insulation layer in the video is providing an additional 7Rs to the floor to prevent heat loss. The two layers of OSB are not attached to the slab and are instead floating above it, without puncturing the vapor barrier. They are securely fastened together with glue and screws to ensure durability. Using two layers of OSB was necessary as one layer proved to be too weak at the joints, and overlapping them at joints adds strength.
If you had a small mudroom, would you approach it the same way? Also, should I leave some space around the edges for materials to expand and contract with temperature changes? Do they really move if they’re not secured to the concrete?