On this you need to fill in 5 6 inches of gravel and an additional 3 4 inches of concrete floor.
Lower basement floor 6 inches.
Login or register to continue reading advertisement.
We dug down somewhere close to 10 11 inches with several inches of concrete on top for a net of about 6.
For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.
This gained over 800 square feet of usable living space without increasing the home s 24 foot by 36 foot footprint.
For example if you want to lower your basement floor 6 inches you ll want to dig at least 14 to 16 inches.
I would like to dig out the 1 foot to 2 feet of the basement floor to achieve ceiling heights of around 7 6 to 8 6 to make to the basement a usable dwelling unit.
Lowering a basement floor costs.
I dug out the dirt with a pick shovel.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Once you have dug as deep as you need you re then going to lay down about 5 inches of gravel.
However if you need to lower your basement floor more than a couple of inches things get a little complicated.
Can anyone offer advice on cost about 700 sq feet worth process and preparation.
I don t expect to be able to do this myself.
This is where underpining comes in play.
The costs to lower a basement floor can greatly vary as there are so many variables involved including your geographical location the contractor you choose the size of your job the complexity of the work the pipes beneath the flooring that needs to be removed how the floor is going to be lowered your home s condition and so much more.
On a recent project we lowered the basement floor by 15 inches bringing the ceiling height from a marginal 6 feet 8 inches to a full 8 feet.
Always remember though that you should dig at least 8 to 10 inches deeper than where you want your finished floor to be.
For me as a taller fella walking around in the basement now felt like a totally different experience.
We d like to finish the basement but realize we ll need to lower the floor to meet code and make the space comfortable.
The difference was huge it felt like at least a foot of difference even after the concrete went back in.
This is the start to finish video of my basement dig out.
I started this project in 2012 and finished in late 2017.