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Question DetailsAsked on 10/15/2013

large horizontal crack in ceiling, is foundation cracked

Two story house, crack on second floor, happened after some one walked on roof

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1 Answer


I hope you mean walked in the attic, or if on roof then a flat builtup roof, unless the drywall ceiling is an A-frame ceiling attached directly to the roof rafters, like in a Farm Craftsman or Cape Cod house.

A straight-line crack parallel to a wall would probably be a drywall sheet joint opening up a bit because of walking on the ceiling joists, or more likely from stepping off the joists onto the drywall itself, pushing it down a bit and causing a hairline crack. If that is all it is, then depending on the surface you could spackle and touch up the paint, or if textured might have to get a drywall contractor in to touch up the texture so it does not show, then repaint.

Any diagonal or jagged crack, if not due to someone stepping directly on the drywall ceiling, would not make me happy, and should be looked at by a carpenter for joist or roof damage. I would suspect this is NOT the case.

When you say large crack - I assumed you meant long. If you meant a wide crack rather than a hairline crack, and your are pretty sure no one stepped directly on the drywall in the attic, then that would indicate excessively weak rafters or joists or trusses in the roof support system, and should definitiely be looked at by a roofer or a structural engineer.

Answered 6 years ago by LCD

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