Less than a year ago I had 3 rooms knocked into 1. The floors were different levels and mostly tiled. Part of the job was to level the floors.
The builder did this and found a concreted over manhole. During works they had to move the waste pipe so uncovered the manhole.
They concreted the whole floor then put a latex floor over the top and vinyl flooring.
A few months after the flooring started to bubble up, significantly concentrated over the area where the manhole is. The bubbling got bigger and has spread and the floor needs replacing.
I’ve been asking my builder and the floor supplier to come and remedy it for months to no avail.
In my hours of googling I have learnt that when you latex over concrete the concrete should be left to dry before the latex for 7-14 days. Looking back at photos of the build they only left 4 days inbetween.
I can’t find what the consequences are of not letting the concrete dry properly are?
Could it have caused cracks in the concrete & now gases are leaking up from the manhole and warping the flooring?
I’ve put a methane detector under the flooring but didn’t get a reading.
Also the problem is very much concentrated in 1 quadrant of the floor though it is gradually spreading outwards.
There is one quadrant that is wooden underneath the rest concrete, 2 of the concrete quadrants are what the builder did whilst levelling the floors, 1 was pre-existing concrete.
If anyone can offer advice or recommendations for how I can get what’s gone wrong clarified & remedied I’d be very grateful!
