Detecting a Hidden Slab Leak: Signs to Look Out for

Slab leaks can open Pandora’s box of problems for homeowners. They can cause extensive damage to a home, a spike in water bills, and not to mention mold growth that can have all sorts of bad effects on your health. 

Unfortunately, slab leaks may go unnoticed and unfixed for a long time. This means that once you finally realize that something is wrong, most of the damage may already be done. However, it may be possible for you to catch wind that something may be amiss and detect the problem sooner. This blog post will outline the telltale signs to look out for if you suspect you have a slab leak. 

Detecting a Hidden Slab Leak: Signs to Look Out for

When it comes to dealing with slab leaks (or just about any plumbing issue), the key to reducing damage is early detection. This is why we have outlined the different signs that may show themselves when you have a slab leak in your home. 

1 – Raised Foundation

If you have a leak in one of your home’s slabs, water may be making its way onto your home’s foundation. This may be dangerous because the foundations may be severely weakened because of water damage. It may also cause the soil and land around the foundations to become raised because of all the excess water content. 

2 – Loss of Water Pressure

Another sign is the weakened water pressure. The explanation for this is simple. The water pressure will not be as strong as it is supposed to be in your faucets and shower because there is a leak somewhere in your plumbing system.

3 – Moldy Smell

Water damage is often accompanied by mild growth. This is why another possible sign to watch out for is the smell of mold and mildew. You may notice that there will be more mold in some areas, which may also be another way to point to where the leak may be. 

4 – Patches of Warm Areas on the Floor

If you have spots of warmth on the floor that should not normally be there, it may be another sign of a slab leak. A severe leak may cause hot water to come into contact with your floor. If you have a tiled floor, you may not feel the heated spots as easily as opposed to if you had a wooden floor. However, the excess water may cause the tiles in your floor to rise, signalling where the leak may be located. 

5 – Higher-Than-Usual Water Bills

Lastly, if you see a sudden spike in your water bill, but have been using the same amount of water, there is something wrong with your plumbing system. At this point, it is a good idea to call a plumber and have them try and find the cause of the spike in your water bills, namely an unseen leak. 


Hidden slab leaks may be difficult to detect, but knowing the signs will certainly help you know that something is wrong. Should you suspect that you are dealing with a slab leak, it is best to turn off your main water supply and call a professional plumber to come and help you with the situation.

If you think you have a slab leak, call one of the skilled plumbers at Candu Plumbing and Rooter! We offer emergency plumbing services and help your plumbing system get back to full functionality again. Call 855-522-2638 today!

Jeremy Parker

Published by
Jeremy Parker

Recent Posts

How Can I Use Leftover Waste Water to Flush My Toilet?

If you don't have running water and don't have the luxury of using bottled water,…

2 days ago

What is the Appropriate Height For a Gas Water Heater?

When installing a gas water heater, there are several things to consider. The height must…

2 days ago

What is the Safest Type of Pipe for Drinking Water?

In today's plumbing, there are several options to consider. Some homes are built with lead,…

4 days ago

So Your Water Heater’s Making Weird Noises? Read This! ​​

Plenty of things go into running a house. One of the key parts is the…

5 days ago

Galvanized Steel Pipe Benefits Home Plumbing

If you are looking for information about Galvanized Steel Pipes, you've come to the right…

5 days ago

What is the Most Common Pipe Used in Houses?

Various materials have been used for pipes since the early days of plumbing. Lead pipes…

5 days ago