Soundproofing Bedroom

[spiidey]

We've had a company in soundproofing our bedroom.

They've completed about 90% of the works and have a few areas to finish off this week

However, we're concerned they haven't actually carried out the works 100% correctly - they were rushing to finish various elements on Friday and we are unclear whether they've actually acoustically sealed the plasterboard at the bottom of the walls where the plasterboard meets the floor, prior to the coat of plaster being applied.

See images below - is there an easy way to remove plaster from walls (e.g. by stanley knife) to reveal what, if any, coat of mastic/other material has been applied to the point where the plasterboard meets the floor, without seriously damaging the solution / plasterboard behind the plaster? I.e. transform first image into second image?

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[flameport]

If you want to remove a strip of plaster near the floor, score it with a sharp knife and then tap the part below the score to remove it. Obviously care will be required to not cut right through the plaster and damage whatever is behind.

Somewhat unusual that a new 'soundproof' wall would be fixed over a chipboard floor in the first place.

 

[spiidey]

If you want to remove a strip of plaster near the floor, score it with a sharp knife and then tap the part below the score to remove it. Obviously care will be required to not cut right through the plaster and damage whatever is behind.

Somewhat unusual that a new 'soundproof' wall would be fixed over a chipboard floor in the first place.

Thanks for the reply. We'll give it a go to remove the plaster strip.

In what respect do you think it is unusual that a new soundproof wall is fixed over a chipboard floor?

 

[kbdiy]

I found that gagging the wife was a far cheaper solution than soundproofing the bedroom

 

[flameport]

In what respect do you think it is unusual that a new soundproof wall is fixed over a chipboard floor?

If the walls are being done, it is presumably to reduce the amount of sound passing through the wall.

It would be usual to remove the floor at the edges, and continue the wall treatment below the floor level in one continuous piece, otherwise sound will pass through the wall below the floor, and as chipboard is a fairly useless material with regards to preventing sound transmission, that sound will then travel up through the floor - and could well be made worse if there is an empty space under the chipboard flooring.
If there are wooden joists which penetrate into the wall, the inevitable gaps between joists and masonry should also be filled.

The replacement floor would be installed up to the edge of the new wall, leaving a small gap filled with mastic or similar material, the gap being covered by the skirting board, which should not be in contact with the floor either.

That all assumes that whatever was done to the wall was actually the correct thing to do, and it was installed properly.