Reunite slab and surround with these step-by-step instructions.
If your patio and its brick frame have separated, remove the loose section of bricks, re-anchor it and fill in the missing mortar. Here’s how to do it:
Materials and Tools:
large pry bar
hammer drill with bit
square and pointed trowel
bucket and sponge
1. If a support post for the porch roof is sitting on the bricks, use a hydraulic jack and a wooden post to temporarily lift some of the weight off the bricks. Just apply enough force to free the bricks.
2. Pry the section of brick surround that has separated from the patio using a large pry bar. Carefully lift the section away from the patio to see what the problem was. In our case, the bricks weren’t anchored to the patio and there was practically no mortar along the base.
3. Chisel away excess mortar from the back of the bricks, and clean out the area. If there’s packed soil beneath the patio, tack up a piece of plastic sheeting to act as a moisture barrier and to keep the soil in place.
4. Lift the section back into place. Use wood shims to temporarily align the bricks until you can come back and add mortar.
5. Drill through the mortar line and into the concrete slab with the hammer drill. Insert a metal support rod — to tie the brick to the concrete — until it stops.
6. Mark the rod and, with a hacksaw, cut it about an inch shorter so the end isn’t visible when the rod is installed. Repeat the process if necessary to install more rods.
7. Mix up mortar and make a stiff batter, about the consistency of oatmeal. Add a bit of concrete fortifier to the mix to add flexibility.
8. Coat the support rod with mortar and insert into the hole. Use the back of a trowel to force the rod into the hole, and fill the hole with mortar so the rod disappears.
9. Pack the gap along the base with as much mortar as possible. Load up a scrap 2x4 with mortar and use it as a platform as you force mortar as deep into the joint as possible with the trowel. Clean excess mortar from the bricks, and tool out the joints so they’re smooth. Finish by running a bead of concrete caulk along the top seam.
10. Leave the shims in place for at least a day until the mortar sets up.This keeps the weight of the bricks from forcing out the mortar.
11. Remove the shims and pack some mortar in the holes, and remove the hydraulic jack and temporary support post.