What base materials do I need for a wall?
The required base layers range from weed barriers, sand, and gravel for outdoor blocks to backerboard or treated plywood for indoor shower panels. Builders struggle to determine the correct combination and order of these materials because they rarely receive solid answers on why a specific layer goes first. This confusion leaves them unable to ensure their wall will stay up for a long time.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
What base materials do I need for a wall?
- 1Asking for clarification on internet forums.Did this help you?
- 2Relying on helpers or contractors even when they cannot explain their methods.Did this help you?
- 3Borrowing base techniques from paver installations.Did this help you?
- 4Reading the specific manufacturer's installation instructions.Did this help you?
- 5Asking on home improvement forums to clarify requirements for specific panel materials.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“If I'm installing pvc shower wall panels from shower base to ceiling, do I still have to use a type of backerboard, or can I just use treated plywood?”source ↗
“My questions is do I put a weed barrier and then gravel on top of it or just gravel? Or weed barrier, sand, and gravel? Or sand and gravel? Sorry for the confusion if my question is not clear enough.”source ↗
“The person that’s helping me said to put down sand first then block. He’s not giving a solid answer on why he put the sand first. Just want to make sure that the wall stays for a long time not for a short time.”source ↗
Where this came up
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