Toilet Gasket

Wow - this is exactly the problem I'm struggling with now. I am replacing a water-damaged ceramic tile bathroom floor and toilet because the new (at the time) ceramic floor caused the flange to be too low, thus squeezing/breaking/rotting the wax seal and toilet gasket.

Question: Can I let the cement backer board under the tile just dry out and redo the tile since I actually removed the ceramic tile already?

I installed a slate floor, bought the spacer kit that came with two wax-free gaskets and the one-half inch spacer. The dry fit puts my flange (with spacer) at 1/4" above the finished floor. The only problem I see is the directions do not specify which direction the rubber gaskets fit to the spacer. One on top and one on bottom but how should they meet and reading above is there supposed to be a code-approved sealant between the gaskets and spacer?

where i work has a awful smell the tolit is clean but i need to know how to get rid of the oder i dont know if it is the tolit or sink is there a way to flush the drain i don;t have a floor drain

Thanks for the excellent website. This describes exactly the problem I have except there's an additional complication. The existing flange is the old cast iron style with bolts fixed in position (no bolt slots). While the flange surface is very rusty, the bolts themselves seem to be in reasonable shape but are too short. Can I replace them with a threaded brass rod of sufficient length with, say, double lock nuts underneath and have the new threaded rods (in place of bolts) then pass through the existing flange and flange extender and install the toilet on that?

Thanks for this info. My husband is going to check the vents today. Am hoping this will be an easy fix. Began to notice the rotten egg odor about a week ago. At first we thought our dog needed a change of diet. But we can't blame the poor dog anymore. It's definitely not him. Looked everywhere for a dead mouse or something rotting. No luck. The odor is only noticeable once or twice a day but it is defiitely a foul methane smell. We've a small house so all fixtures are used daily. I believe this gas is dangerous and if it isn't an easy fix will call a plumber in. Thanks again. Very informative.