Check every waterpipe coming out of the floor.
Concrete floor under leaking toilett.
If it gives this may be the problem.
I had a similar problem the cause was a very small leak where the pipe joined the tap in a sink about 25ft from where the wet patch appeared.
Loosen the nut that attaches the supply line to the tank and it should slide out easily.
Signs of trouble bathtub drain leaking.
In the case of a tub set on a concrete slab the leak will ruin flooring in the bathroom or adjoining rooms.
Another way to tell is to examine the drain from underneath which can be accomplished in the crawlspace or the basement.
Place the nozzle of the open caulk tube in the crack between the toilet base and the top of the floor.
When a toilet leaks water from the bottom base on the bathroom floor you most likely have a worn out wax ring seal.
The best way to tell if this is your problem is to push down on the floor around the drain.
If you have carpeted floors search for areas that look darker or are unexpectedly damp.
Disconnect the water supply line from the toilet tank.
If your toilet has been leaking there is a danger the wooden subfloor will be damaged as a result.
Squeeze the handle as you drag the gun along the base to deposit a thick bead of caulk to the.
If the subfloor is spongy under your leaking toilet the toilet may have started to wobble and the problem is quickly going to get worse unless you make a fairly major repair.
If they are too corroded to turn use a hacksaw to cut the bolts.
Slab leaks create water build ups underneath your concrete foundation.
This wax ring seal is positioned between the toilet and the floor.
Water stains on the ceiling or joists below.
Loose flooring near the tub or damp floors in adjoining rooms if the tub is on a concrete slab.
This is to prevent sewer gas and other bad smells from escaping into the bathroom.
If you have wood panel floors watch out for spots where the wood starts to warp.
Leaking drainpipes in a shower or a bathroom plug will let water underneath tile.
Water will find a way under the concrete and rise when it finds space ie.
Under every toilet is a large round wax seal.
With a wrench loosen the toilet mounting bolts or tee bolts that hold the toilet to the floor.