Is there anything I can do to stop squeaking and flexing in my main floor 48x36" acrylic shower base. The instructions weren't properly followed in using levelling mortar when it was installed and some of the levelling feet aren't touching the floor unless you stand in the shower causing the base to flex and squeak. I have a access to underside of the bathroom floor by removing ceiling tiles in the basement. Thanks!
Best answer has been said. Use low expansion spray foam, specifically window and door. Don't use to much, get it spread through out, underneath the shower base.
It will act as an adhesive from floor to base and at strength to the base, reducing movment.
Don't apply too much, dont want the base lifting.
Best of luck.
Elliott's Trusted Trades
Remove a couple of ceiling tiles underneath
Drillsome holes in the plywood floor directly under the shower base.
Inject low expasion foam......not too much.....you do not want the base to lift.
Hope this helps,
The spray foam idea can work. A few tips though.
Put some weight on top of it to stop the spray foam from lifting it if it's not attached well or if its a little flimsy.
Don't use it for a couple of days after to make sure the foam is completely set. If not your efforts will be for nothing.
Be careful. I contacted the mekers of "Great Stuff" and asked about their foam products. The low rising is meant for windows and doors. None of the canned products are meant for your application. There is a foam product for the purpose you describe but you are looking at about $350 for the product (which is a mixture of two chemicals.) I would suggest adding more mortar, if you can access the area, or, best scenario, replace the unit. Remember, foam is not a structural support product.Plus, in some cases, the chemicals leach into the unit and can discolour or weaken the integrity of the base material. Do some more research before making a quick fix ... and do it the right way.
What I usually do after the bases are installed and plumbed is grab a spray foam can or two and just fill the voids the best I can all around the drain and feet and everywhere I can. Perform a walk test 24 hours later and should be good and help with movement.
There's little that makes me Craizier than a Squeaking Shower Fllor.
1.Subfllor flexing most of time, a noisy shower pan is actually due to plywood or shiplap subflooring flexing on a nail or screw.
2.Gaps between the pan and floor.
Sometimes squeaking are caused where the floor tile meets the shower pan.Normaly , there should be a slight gap between the shower pan and the floor tile.
3.Poor thinset. Look for a shower pan that allows you to use a mortar or thinset, underneath it.not all manufactures allows this but it can make for a sturdier shower.
4.Pan Screwed into wall studs.
Shower pan can , squeak when they ' re screwed into wall studs.
5.Wet Wooden floor.
Make sure to water Proof the area outside of your shower when wood swells and expands shower pan cause movement under your shower pan.
6.Heat expansion.Darker tile absorbs more than lighter tile.
7.Subfloor damage.Watch out for the quality of your bathrooms original or renavated subflooring.
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