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Discussion Starter · #1 ·
I have 5W x 6L closet that I am going to make into a laundry. I can get drain and water their easily.

What I am worried about is the vibrations of a front loader hurting the structure of my house or cause damage to rooms below. There is 3/4 plywood as the subfloor.

Would anti vibration pads or feet be sufficient or do I need to add another layer of plywood plus pads?

I will be making the floor Tile and have drain in the floor incase of water leaking or machine failure.

How do I keep the high frequency vibrations from hurting the rest of the house?

my front loader that I have not doesn't walk or move when it runs. I had it on a first floor before we moved at never had problems. The first floor had a tile floor with 3/4 plywood subfloor. No joist reenforcement.

Thanks.
 

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There is nothing structural that would be damaged by the machine vibration. You shouldn't worry about popping sheetrock nails. They do that by themselves, and they are easy repairs.

I am not clear on the condition of your tile floors, but I would lay down another 3/4 ply floor, glue and screw, and treat the whole room as a shower floor (anti leak membrane), before using it as a laundry.

Stiffening is for tile or grout because of extra weight of the machines, and membrane is extra insurance.
 

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Discussion Starter · #3 ·
I haven't installed the tile floor yet. My plan was to put down 3/4 hardi board on tip of the existing plywood. Put the paint on liquid water proof and tile. Do you think I need an additional 3/4 plywood?
 

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1/4" Durrock or Hardi is all you need--that product has no structural value---

If you are concerned about the sub floor strength---add an additional layer of BC plywood--1/2" should be sufficient.
 

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Discussion Starter · #5 ·
Thanks for the advice.

I am not that concerned with nail pops, as they are already poping (1993 house). I like to replace the pops with screws anyway.

You think I should be concerned with the seems?

Thanks again.
 
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