Looks like we have a slab leak in our house. I noticed warm tiles around the laundry area where we have pinpointed the hottest point and the warmth seems to spread about 6 feet outwards.

The weird thing is, the water in the house was shut off 24 hours ago, but the floor tiles are still warm. I cannot work out why.

Any ideas? 12 hours ago I also turned the pilot light off at the water heater, but tiles are still warm. How can this be? Surely after 24 hours it cant be residual heat?

Any help appreciated.

  • 1
    After 24 hours a slab could retain plenty of heat to still feel warm, especially if it’s a thick one. You shouldn’t jump to the conclusion that you have a leak just based on this. You should seek further proof if you are concerned. – paul Sep 3 '18 at 10:19
  • Thanks Paul. We certainly have a slab leak as determined by a plumber. The issue is the heat retention 2 days after the water has been shut off. Was wondering if this was common as I wouldn't think water/concrete could stay hot so long. – lowercase Sep 3 '18 at 19:29

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