![]() David Frane is a freelance editor and a good buddy of ours. Learn more about high-performance foundations in the Building America Solutions center. Using aluminum foil to protect the threads on the bolts is a nice touch. I like how he uses drywall screws instead of duplex nails. Osland does some things that wouldn’t have been done in 1965, like using more rebar and installing the many j-bolts and hold-down bolts required by today’s seismic codes. My house was built in 1965 and I can tell its stem wall foundation was built the same way-with many of the floor joists having first been used for forms. After the foundation is stripped the 2x8 form lumber is “recycled” for use as floor joists.Stem wall is placed second, using wetter concrete so as not to leave voids.Footing is placed first using very stiff concrete.The walls are formed with 2x8 lumber stacked on edge.The footing is contained within a trench above which forms are supported and braced by vertical and diagonal 1x2s. ![]() Osland uses an old-school method to place the footing and walls in a single pour. Stem walls are short-typically just tall enough to create a crawl space under the floor joists. The house is being built near the coast in Northern California, where the ground never freezes and stem wall foundations are common. Of course, there are shallow frost-protected monolithic slab foundation methods for cold climates, that expand on simple slab edge insulation but we're not going to talk about that here.īut in parts of the country where the frost line is shallow or the ground never freezes it’s not uncommon for contractors to form and place their own shallow foundations-as is being done in this video shot by Dave Osland. ![]() In those parts of the country where the frost line is deep and basements are the norm, foundations are typically built by specialty subs, who can afford to stock the necessary forms because they use them every day. This old-school stem wall foundation method kills two birds with one stone
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