To settle or not to settle... that is the question..
A properly constructed foundation should include proper preparation of the earth beneath the footings, and if that earth is properly prepared (removal of all organic and unsuitable soils and replacement with free draining mineral soils...aka; gravel) and compacted properly, there should be no settling. Settling of a foundation is a sad excuse for what might not have been done completely and properly in the beginning.
[This message has been edited by treebeard (edited February 09, 2004).]
The requirement for free draining and well compacted gravel under foundations , footings, and other poured concrete structures provides a secure footing only if the water has a place to drain to. Picture it this way...a foundation hole is dug in a relatively clayey soil, and that clayey soil holds water. Even if the footing trench is lined with the appropriate gravel and compacted to the extent it can be, the water in the trench still has no place to drain to away from the foundation. If exposed to temperatures below freezing, it will most certainly move as it freezes. And anything built upon it will move, also. If constructed in warm temperatures and backfilled correctly, even then, if everything else is constructed correctly, the structure may move if the wet clayey soils below the foundation and footings have not been removed to natural free draining gravel. The structure will 'settle' or sink under the weight. In circumstances like this where the clays or silts or glacial tills are so deep that removing them is not feasible, the footings can be designed so as to spread the load of the structure over a wider footprint...basically the footings are much wider than normal. Instead of 2-3' you might have 5-6', or somewhere in between.
- 15 Old House Features We Were Wrong to Abandon
- 17 Tiny Bathrooms We Love
- 20 Insanely Easy 60-Minute Home Improvements
- 17 Design Inspirations for Mudrooms and Entryways
- 25 Clever Ideas for Repurposed Storage
- 10 Clever Uses for the Space Under the Stairs
- Laundry Room Ideas to Knock Your Socks Off
- 30 Things Every Homeowner Should Know How to Do
- 11 Clever Alternatives to Kitchen Cabinets
- House Quiz: Test Your Knowledge of U.S. Architecture
- 10 Things You Can Build with Plumbing Pipes
- Sweet Dreams: 16 Inventive Beds You Can Make Yourself
- Kitchen Envy: 10 Rooms We Love
- 16 Ingenious IKEA Hacks
- 18 Clever and Easy DIY Ways to Use Rope at Home
- 10 Eye-Catching Options for Your Front Door
- 10 Room Dividers to Bring Order to Your Space
- 9 No-Sew Fabric DIY Projects to Dress Up Any Room
- Tips and Tricks to Fit More into Less Closet Space
- Secret Rooms: 10 Special Spaces Hidden from Sight