I've reduced the vibration from the washer to as minimum as it will be by leveling, but it still transmits a pretty solid vibration to the second floor of the house.
I've added screwed a 4'x4' 3/4" platform under the washer, which has had a minimal improvement
The main floor is 5/8" osb on 2X10 16" oc joists with cross bracing every 4ft (btw...I feel the cross bracing is a cheap construction trick to meet code).
The room is approx 6'x12' and sit close to the corner of two main steel beams supporting the main floor of the home.
Will the following solution give a rock solid base to this room and solve the problem? Are there any other steps that will reduce vibration from a front load washer?
- Take up linoleum. Glue down 3/4" plywood in whole laundry room, screw to joists every 6"
- pour self leveling compound on top of this, then ceramic tile.
- in basement, add 2x10 headers between joists (glue and screw) (every 4ft?)
- glue and screw 1x5 planks accross joists in the basement(every 2ft?)
- possible sister the middle joist of the laundry room from the basement.