One of the most common places that I find plumbing leaks during home inspections is at the showers. Steel showers always leak, glass doors frequently leak, and tiled shower floors will usually leak if they're installed wrong. Any time I inspect a home, I do my best to find these leaks. Today I'll share a few of my methods.
Metal Showers
These old showers look really nasty. All I need to do to make these leak is run the water. They leak at the sides every time! The fix is to replace the shower.
While a leaking glass door typically only allows some water to leak on to the bathroom floor, this can eventually lead to major water damage at the sub-floor if the shower base or tub isn't properly caulked at the floor. The photos below illustrate this quite clearly, I hope. To help prevent damage here, always make sure that the tub or shower is properly caulked at the floor.
Tiled Shower Floors
They look great, but they often leak. These leaks sometimes take a long, long time to manifest themselves because the leaking is often very minor and very slow.
I look for caulked joints in the floor, cracks in the floor, and patching at the ceiling below. I also use a rubber shower dam to fill the shower with about 2" of water. I leave the water slowly running in the shower and I don't worry about it overflowing - that's the beauty of using a dam. I've found a lot of leaking showers using this method. The leaks usually take a while to show up on the ceiling below, but it's dramatic to witness once it happens.
The repair for a leaking shower is to replace it. Caulking any cracked areas in the tile is not an acceptable repair.
Shower Drains
Shower drains occasionally leak at the connection between the drain and the tub or shower. I find these leaks by carefully examining the area below the drain for any drips after I've run the water. These repairs are usually quite simple.
Plastic shower drains ocassionally leak, and these leaks are extremely difficult to find during the course of a home inspection. A friend of mine had a big stain on his ceiling below the shower, so we spent a couple hours trying to figure out where the leak was coming from, but we couldn't make it leak. Two days later, the stain got bigger. It turned out that the drain was leaking only when he was actually standing in the shower, which caused the shower floor to bow just enough to make the drain connection leak. I've never found a leak like this during the course of a home inspection!
Just for fun
Here's a quick video of a rotted subfloor in a shower. This shower had been leaking for a long, long time. (right, Milind?)
Reuben Saltzman, Structure Tech Home Inspections - Email - Home Inspector Saint Paul
There are several tools and equipment available in the market for detecting leaks in shower. Showers are used on daily basis and so you want to get this problem sorted.
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