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Question DetailsAsked on 8/24/2014

is there a way to raise a house enough to give us a good crawl space

it is very cold in the house in the winter time. I believe it is because the crawl space was never insulated . is there some one who could help

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2 Answers


I am not sure of what the codes are indifferent areas of the country but here it used to be 24 inches and now 30 inches. If this is not what you have and should be enough to get in there and insulate your best bet may be a house moving company. They could slide steel girders under the house and jack it up to add the extra blocks needed for full acess. The reason for the minimum code around here is for termites, there is a certain height that they can build unsupported tunnels and the 30 inch code seems to meet this.

You could insulate even if there is just enough space to inchworm across the crawlspace and install the insulation and vapor barrior.


Answered 6 years ago by ContractorDon


Unless you have a very minimal crawlspace, you should not have to raise it to put in insulation - even with 12-14 inches crawlspace it is possible to put in a vapor barrier and where applicable, insulation. I remember one commercial job where a subcontractor specifically advertised for a very small laborer for this type of job - got someone who was well under 5 feet tall and weighed about 70 pounds - she was basically what you would ball a stringbean body type, but she really moved around a very large crawlspace very well and did a fantastic job in as little as 10 inches clearance. He ended up hiring her permanently for work in ductwork and suspended ceilings and attics and similar tight spaces - she picked up the well deserved nickname "insulation imp".

Depending on your type of construction and whether you want piping and wiring to be fully accessible from below (say for an older house with aging plumbing or planning on major plumbing/wiring upgrade in future), an Insulation Contractor can put in insulation and vapor barrier either in your flooring joist spaces, or on the foundation walls and the crawlspace "floor". Of course, if insulating the crawlspace rather than the floor, you then have to provide ventilation in the crawlspace, as it becomes part of your air conditioned living area.

Raising your house is quite expensive - typically running $10-20,000 plus, versus the thousand to two typically for vapor barrier and insulation. If you put the following two phrases into the Ask Your Question box (Ask) above, you can see other responses on typical cost ranges for raising a house or changing a crawlspace to a full basement - raise house and add basement

Also, raising your house will almost always result in at least architectural damge - some drywall cracking and possible siding buckling, roofing creasing and deformation, cracked windows.

Bear in mind if your crawlspace gets wet you need to address teh water issue first - because vapor barrier can handle damp soil, but not free water in the crawlspace, so some basement waterproofing or sump pump installation may be needed first in that situation.

Answered 6 years ago by LCD

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