We are currently having our vinyl liner replaced. I went outside to check on the progress after the crew put the liner in and noticed a lot of bumps on the floor. I thought maybe they were air pockets or something of the like but, after further inspection, realized they were lumps underneath the liner.
The crew had to remove some of the old sand material underneath that had moss growing in it and patched it with new material. We never had these lumps before. When I spoke to the install manager, he told me that this was normal and to be expected with a sand bottom. If we wanted something smooth, it would have to be replaced with concrete or they would need to add a "skim coat" to it which means we would be paying for additional materials.
Is this normal? Do these bumps flatten over time or should we expect the installers to grade the bottom and smooth the patches that they made? Pictures for reference.
The crew had to remove some of the old sand material underneath that had moss growing in it and patched it with new material. We never had these lumps before. When I spoke to the install manager, he told me that this was normal and to be expected with a sand bottom. If we wanted something smooth, it would have to be replaced with concrete or they would need to add a "skim coat" to it which means we would be paying for additional materials.
Is this normal? Do these bumps flatten over time or should we expect the installers to grade the bottom and smooth the patches that they made? Pictures for reference.
