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Charliefromlost t1_jablyft wrote

Reply to comment by Spinaccio in Cracked joist under fireplace, floor sagging by willxthexthrill

Is it necessary to dig to the frost line if the building is heated? I ask because I have little floor jacks under my kitchen that I presume the renovators put in to help support the tile and granite that was installed. This is on a crawl so it gets cold below the house but it doesn't freeze or else my pipes wouldn't be very happy

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Homebrewsailor t1_jabt8uy wrote

You don’t need to dig below any frost line. Your basement already does that. You’d cut out the floor below your post because you can’t trust the concrete floor. Who knows how thick it is and how well it was done

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Charliefromlost t1_jadfk2u wrote

My crawl space is just a dirt floor and only the foundation wall footings are below frost line. The dirt in the middle isn't dug as deep.

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