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-   -   Replacing a foundation -- some questions (http://www.diychatroom.com/f105/replacing-foundation-some-questions-164353/)

strategery 11-22-2012 01:10 AM

Replacing a foundation -- some questions
 
Without jacking up the house, is it possible to replace the foundation with CMU and pouring the footings a little lower for a taller basement?

If the house is a one story built a hundred years ago, there wouldn't have been any footings as i understand it. I would like to replace the foundation and the floor. It's currently a little over 6 feet, but the basement floor is THIN. I would like it if I could get a ceiling height closer to 7 feet, but with a thicker floor over insulation and gravel. That would call I'm guessing for footing about 10 inches or 1 foot deeper than the bottom of the foundation walls are now.

I've been told that picking up the house is a huge expense (obviously) though it makes the work a lot easier especially if using a poured concrete foundation. In my case, I'd like to do CMU with a couple inches of foamboard on the outside.

Thoughts on this? Have you done it, had it done, or SEEN it done?

oh'mike 11-22-2012 05:01 AM

I'm not a concrete guy--what is CMU?

itsreallyconc 11-22-2012 05:24 AM

concrete masonry unit, mike. by the way, happy Gobble-Gobble, too ! properly used, 'masonry' is the world's oldest fraternity however 'masonary' has largely been discarded as a word so, in today's wikipedia vernacular, i guess 'masonry' is now all 'mortar inclusive' work.

yes, grasshopper - all things are possible depending on the depth of your purse :) but, unless you have clark kent eyes, dig before deciding there's no footer,,, i did this to our home ( blt in 1856 ) but we used concrete,,, all you need to is rent some beams & raise the house 1/2",,, most utilities into your house have some flexibility BUT ask the utility safety people for their seal of approval ANY time you mess w/their stuff,,, you probably need to involve your local bldg dept (permits, inspections, approvals) even tho all you're actually doing is giving them a reason to justify their paychecks since, imho, most are wanna-be contractors & worthless as balls on a ******,,, but i digress
:laughing:

the right jacking contractor will have lots of insurance, hydraulic jacks, a manifold, & experienced operators to man the system,,, after its up in the air, the rest is easy.

rent a bobcat, dig it out, pour the steel-reinforced footers, have your block guys build the walls, place the bsmt floor, lower the house, call utility guys AGAIN :thumbup:

strategery 11-26-2012 05:00 PM

Quote:

Originally Posted by itsreallyconc
concrete masonry unit, mike. by the way, happy Gobble-Gobble, too ! properly used, 'masonry' is the world's oldest fraternity however 'masonary' has largely been discarded as a word so, in today's wikipedia vernacular, i guess 'masonry' is now all 'mortar inclusive' work.

yes, grasshopper - all things are possible depending on the depth of your purse :) but, unless you have clark kent eyes, dig before deciding there's no footer,,, i did this to our home ( blt in 1856 ) but we used concrete,,, all you need to is rent some beams & raise the house 1/2",,, most utilities into your house have some flexibility BUT ask the utility safety people for their seal of approval ANY time you mess w/their stuff,,, you probably need to involve your local bldg dept (permits, inspections, approvals) even tho all you're actually doing is giving them a reason to justify their paychecks since, imho, most are wanna-be contractors & worthless as balls on a ******,,, but i digress :laughing:

the right jacking contractor will have lots of insurance, hydraulic jacks, a manifold, & experienced operators to man the system,,, after its up in the air, the rest is easy.

rent a bobcat, dig it out, pour the steel-reinforced footers, have your block guys build the walls, place the bsmt floor, lower the house, call utility guys AGAIN :thumbup:

So when you did this you used poured concrete? You only needed to raise the house 1/2"? I'm told by many that poured foundations are impossible without lifting the house up significantly. Maybe I have some bad info.

itsreallyconc 11-26-2012 11:38 PM

we did - talk to a house mover or a specialist in house jacking,,, i had 2 fellow Shriners helping,,, we also had 4 fireplaces to shore & jack :eek:

strategery 11-27-2012 08:01 AM

Good money spent too I bet.

I could pick the house up and replace the foundation and dig out a deeper basement for a ton of money or I could spend a lot of money and just shore up the house on beams while replacing with blocks. The latter option costs half as much.


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