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TF: Tile movement and popping noise over underfloor heating

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TF: Tile movement and popping noise over underfloor heating

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tinygillespie

TF: Tile movement and popping noise over underfloor heating

Hi.

We've had a bathroom installed with electric mat underfloor heating in a new extension. The heated mat was not turned on for a month after the tiles were laid and then the heat was gradually increased by 1 degree a day. The mats are on a timer to reach 25 degrees over a 3 hour period each morning and evening.

As you can see from the attached video, the tiles make a popping noise and seems to move excessively.

As far as I understand it, the visible layers are:

bottom - electric mat
middle - tile adhesive
top - tile (900mm x 900mm)

Both the adhesive and grout used were allegedly flexible. I have no idea what particular brands were used.

Is there any way to resolve the movement issue without ripping everything out? I've seen Fix-A-Floor mentioned in various threads elsewhere and wonder if it's worth giving that a shot first?

Thanks.

TG

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