How tall are most basements?
The standard basement wall height has been eight feet for many years. Once the concrete slab is poured, the actual headroom height is only about 7′-9”. Basement ceilings are usually strewn with pipes and ductwork that serve the floor above. These intrusions further lower the basement ceiling height.
Can I dig my basement deeper?
Digging deeper. You’ll need to make structural changes to your house to gain ceiling height. Depending on the size of your basement, the cost of digging it out and underpinning it could cost $50,000 to $90,000. But you’ll gain an entire floor. For many people, it’s worth the investment.
Can a basement be bigger than the house?
It depends. If the basement does not extend the full footprint of the house, it is easy (this is just expanding into a crawlspace). If it already extends the full footprint of the house, you should seriously consider why you want to expand to create a wider basement. It’s definitely possible, but it is very expensive.
Can you increase the height of a basement?
The answer is yes; after some research, we’ve found that raising a ceiling and/or lowering a floor in a basement can be done. However, do note that each project or the combination of both can be time-consuming and expensive.
Can you lower the floor in a basement?
Lowering a basement floor is a practical way of way enabling the addition of much-needed space in a home but it must be done by a qualified foundation repair contractor that uses proper engineering data and state-of-the-art construction methods.
How big is a 10 foot basement compared to an 8 foot basement?
Under identical soil conditions, the load experienced by a 9-foot basement is around 50% greater than the load felt by an 8-foot basement. A 10-foot basement feels almost double the load felt by an 8-foot basement in the same type of soil (Figure 2).
What to consider when designing a basement wall?
Designing a wall to prevent failure in bending requires a proper analysis of the soil loads and an appropriate structural design of the wall. It’s important to consider not just the wall’s construction, but also the drainage provided and the way the wall is tied to the house’s floor frame.
How big should a backfilled basement wall be?
For example, a 10-foot basement wall backfilled with a moderately soft clay soil in an undrained condition feels a load of 4,000-plus pounds per foot — close to four times the approximately 1,250 pounds per foot of wall experienced by an 8-foot basement backfilled with sand or gravel.
Can a concrete basement wall support a house?
Concrete’s compressive strength is much greater than it needs to be to support a house. As long as the soil under the footing has adequate bearing capacity, the ability of a concrete wall to carry the load is not a question. Soil pressure against the basement walls, on the other hand, can sometimes be a problem.
