Laminate under washing machine 'bouncy' causing knocking noise on spin.

P

portlanders

Member
Washing machine makes loud knocking noise on 1400 spins (transport bolts are out and machine is level)
I have 12mm laminate on 5mm foam underlay in the kitchen to which the washing machine sits.
The rear of the laminate where it reaches the back wall is somewhat 'bouncy' and i believe this is the cause of the knocking on spin. It's solid where the front feet are, just bouncy and uneven by the back legs.

I don't want to take all appliances out, plinths up, and lifting all the flooring just to look at this.
What i was thinking best plan is to draw a line where the front feet of the washing machine are, cut out the laminate flooring from that point, lay 18mm osb, and silicone the gap between the laminate and osb.

Or perhaps just do this for the back feet and leave the front as they are?

Does this sound feasible? if so what is the best way to fix down the osb, and what packers can be used to ensure it's level?
If not feasible any other suggestions?

Machine is under a worktop, probably another 10mm to play with.
I have levelled the machine best i can, but the flooring under the machine is not the same level as outside it, so whilst i have levelled left to right perfect, i can't be sure it is level front to back.

Thanks for any help with this, it's a new machine with a 5 year parts and labour warranty so want to make sure flooring is spot on.
 
portlanders said:
Washing machine makes loud knocking noise on 1400 spins (transport bolts are out and machine is level)
I have 12mm laminate on 5mm foam underlay in the kitchen to which the washing machine sits.
The rear of the laminate where it reaches the back wall is somewhat 'bouncy' and i believe this is the cause of the knocking on spin. It's solid where the front feet are, just bouncy and uneven by the back legs.

I don't want to take all appliances out, plinths up, and lifting all the flooring just to look at this.
What i was thinking best plan is to draw a line where the front feet of the washing machine are, cut out the laminate flooring from that point, lay 18mm osb, and silicone the gap between the laminate and osb.

Or perhaps just do this for the back feet and leave the front as they are?

Does this sound feasible? if so what is the best way to fix down the osb, and what packers can be used to ensure it's level?
If not feasible any other suggestions?

Machine is under a worktop, probably another 10mm to play with.
I have levelled the machine best i can, but the flooring under the machine is not the same level as outside it, so whilst i have levelled left to right perfect, i can't be sure it is level front to back.

Thanks for any help with this, it's a new machine with a 5 year parts and labour warranty so want to make sure flooring is spot on.
Click to expand...
Your suggestion as to drawing a line at the front feet, cutting out the section, and laying OSB is what I have done, I used ply.

With the washing machine on laminate you will probably find, eventually, that the feet will wear through the surface of the laminate even with the feet being rubber. Maybe also screw in a couple of cups for the front feet only to fit in, many sizes on line, that will help to keep it in place. If you put them on the back as well you will have trouble getting the machine out if you need to, so don't bother.

If it still shakes around excessively it must be the machine.
 
Our washing machine knocks at low spin speeds. Once at high speed the spin is fast enough to balance out the wobble effect of an unbalanced load and the knicking stops.
You don't say what speed you are running.
 
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