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Question DetailsAsked on 4/13/2015

what is the cost to replace the main support beam that has rotted/compressed?

Small home - main beam is approximately 30' long and wood has compressed to the point where it cannot just be jacked up. It must be replaced in its entirety. There is no basement, but a dirt floor crawl space of about 3' clearance.


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1 Answer


I realize this question is a couple of years old, but just in case you have not done anything about this yet:

The "compressed" wood would not of itself condemn the beam - but the compression was obviously a symptom of the rot, which would condemn it if more than surficial.

Cost depends on exactly how the house is supported and particularly whether the floor joists sit on top of the bem (easier to handle) or fasten into the side of it with joist hangers or into pockets in the beam (more hassle to handle). And of course, accessibility in the crawlspace and how hard it is to get a new beam into place factor in too - commonly this sort of replacement runs in the thousand to few $ range and can run higher with difficult access (like house is down in a hole so new beam cannot be snaked in from outside without trenching for it) or if house if non-rectangular or odd design and the beam is supporting more than just a rectangular house portion - like under main house area but also extending out under and supporting a wing. Pretty rarely under $1000 at all, most especially in a low headroom crawlspace, and particularly with it being 30 feet long. I would be expecting several thousand $ range, and then be happy if it comes in closer to $1500-2000 range.

Here is a link to another similar question with links to a number of related similar questions with answers, FYI:

Answered 2 years ago by LCD

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