Hello,
we want to build a patio cover onto our single-family home, which was completed in 2007. We would like to keep the option open to enclose three sides of it at a later date.
Currently, the patio is bordered by a strip footing, on which granite cubes serve as the edge restraint for the 4cm (1.5 inch) concrete slabs.
The problem arises from the fact that about 1.8m (6 feet) of fill was placed under the patio (using the excavated soil from the basement). So far, the ring beam has settled only about 1cm (0.4 inch), but it is difficult to predict whether this will remain stable.
If we now place a conservatory on the ring beam and it settles over the years, this would likely cause problems for the conservatory.
Therefore, we plan to remove the material inside the ring beam and pour a concrete slab.
The procedure would be as follows:
Remove the patio slabs, gravel, and crushed stone.
On the front edge of the patio (parallel to the house wall, bordering the lawn), install three pier foundations about 2m (6.5 feet) deep.
Drill from outside through the wall into the basement ceiling and adhesive-anchor reinforcing steel rods.
Place two layers of reinforcement mesh and tie them with the rods in the house wall and the pier foundations.
Pour the concrete slab.
Now to the questions:
1) What do you think of this approach? What is good, what is bad, what would you do differently, and what would you keep the same?
2) Does bonding the reinforcing rods into the basement ceiling create a thermal bridge? How is this usually handled?
I look forward to your input and a lively discussion.
manello01
we want to build a patio cover onto our single-family home, which was completed in 2007. We would like to keep the option open to enclose three sides of it at a later date.
Currently, the patio is bordered by a strip footing, on which granite cubes serve as the edge restraint for the 4cm (1.5 inch) concrete slabs.
The problem arises from the fact that about 1.8m (6 feet) of fill was placed under the patio (using the excavated soil from the basement). So far, the ring beam has settled only about 1cm (0.4 inch), but it is difficult to predict whether this will remain stable.
If we now place a conservatory on the ring beam and it settles over the years, this would likely cause problems for the conservatory.
Therefore, we plan to remove the material inside the ring beam and pour a concrete slab.
The procedure would be as follows:
Remove the patio slabs, gravel, and crushed stone.
On the front edge of the patio (parallel to the house wall, bordering the lawn), install three pier foundations about 2m (6.5 feet) deep.
Drill from outside through the wall into the basement ceiling and adhesive-anchor reinforcing steel rods.
Place two layers of reinforcement mesh and tie them with the rods in the house wall and the pier foundations.
Pour the concrete slab.
Now to the questions:
1) What do you think of this approach? What is good, what is bad, what would you do differently, and what would you keep the same?
2) Does bonding the reinforcing rods into the basement ceiling create a thermal bridge? How is this usually handled?
I look forward to your input and a lively discussion.
manello01
M
manello0128 Aug 2020 16:07Steven schrieb:
Hello manello01
The floor slab is fine, and the foundations should be as well. But why do you want to connect the slab to the house? It only makes things unnecessarily complicated. The small movement between the house and the floor slab should be accommodated by the profiles of the patio roof.
StevenI would then also need to install foundations at the back of the house. That would mean a six-point foundation, three at the front and three at the back. At the back of the house, I would have to dig 2.5m (8 feet) deep, as deep as the excavation pit was. All the drainage gravel would have to be removed. This would be significantly more complex than connecting it to the house.manello01 schrieb:
It would be significantly more complicated than connecting it to the house.HelloCreate a connection every 50cm (20 inches) using 12mm (½ inch) rebar.
That’s also not exactly easy.
Steven