Hi, how critical is it that my toilet flange is level? I.e. flat.
It seems a part of the sub-floor is pushing up one side of it higher than the other. I need to put some extenders on it anyways, but I'm wondering if the issue of it being uneven is going to be problematic?
There are a couple problems here. The flange should be secured to the floor, as should any extender you install. The toilet bolts could break the flange by an uneven pressure. I would suggest you investigate the reason the flange is not sitting level and try to fix it. The wax seal will make up for a small amount of unevenness, but don't expect it to seal as well.
If you have never made a mistake, you haven't done much.