Unlike the previous porch, we want to have footings supporting the new front porch. The plans call for three columns: one at each of the front corners and one in the middle, but while they specify the size of joists to use, they don’t specify the size or type of column or footing. I decided it was better to oversize than undersize, especially since I’m not a fan of either spindly-looking supports or the quality and trueness of the average pressure-treated 4×4. The result is 12″ round, reinforced concrete footings that go deeper than the frost line and 6×6 pressure-treated columns. We plan to clad any exposed lumber in PVC trim.
I figured out the locations of the footings using tape measure and a board that I marked with the distance from the house, since it was easier to lay that down that remeasuring with the tape. The corners are set in from the edge of the house by six inches so the gutters and soffits won’t extend past the edge. That also made it (slightly) easier to dig the footing that’s right up against the neighboring fence.
Digging the footings by hand sounded awful, especially since I was still sore from breaking up the old stoop. So we rented a two-man (person) auger with a 12″ bit and an extension. Between drive time, use, and cleaning, we used just about the whole 4 hour window for the three footings, but Sarah and I were able to get them all dug while my mom watched the kids. We put down tarps for the dirt since we’d installed fabric and mulch last year and I didn’t really want to mess all that up. We still need to haul all of the dirt to the back yard. I don’t have any pictures of the actual augering, since we were under a time crunch and obviously both of us were using it at the same time.
After the holes were dug, we dropped in the knock-off Menards-brand sonotubes. Then I used the laser level to mark the same height on each and cut them down by a few inches so they were even. This wasn’t critical, since the posts can be different lengths, but I think it will look better visually. The next step was concrete. Our poor Subaru Impreza hauled two loads of twelve 60lb bags of high strength concrete mix. We mixed up a few bags at a time in the wheelbarrow and shoveled it in. We added three ½” rebar rods to each footing, spaced evenly, with a ⅝” J bolt for the post base proud of the surface by about an inch. Derek helped by mixing up concrete in his own wheelbarrow and dumping it in.