Description : I had 3 white brick columns built under the porch in the cottage. After a year, however, the columns fell and there is 3 cm space between them and the veranda. The base was probably not paved. What with ... guarantee. The porch is supported by 3 bars, each on one pillar. But now they are in the air.
Last Answer : I would strengthen the base to prevent further collapse. Then I would venture out the porch a few inches and put the pillars under it. After launching the jack, everything should hold like a rock. But it's a job for a construction company. You probably can't do it alone.