Micha-90
2024-02-16 09:28:39
- #1
Dear forum community,
A few years ago we bought an old building (built in 1937) with an extension (1977). Now we want to redesign the courtyard and have it paved. A gravel drip edge is to be created along the house wall. According to the 1977 construction plans, the extension was built on natural soil (clay, slate, rock). The foundations are 100 cm deep, 30 cm wide, and made of rammed concrete B 160. The building is not basemented in this area. There have been no moisture problems so far. Rising damp is not apparent. The foundation has no flat surfaces. Below the masonry made of aerated concrete there is a horizontal leveling layer made of brickwork. The courtyard surface slopes down from the house to the terrain.
As a layperson, the question arises for me whether and how the foundations should/must be treated beforehand, if at all. Despite reading numerous posts, more questions than clarifications arose. Also regarding a possible foundation failure.
In my opinion, the following variants are conceivable:
A) completely expose the foundation, clean, seal (bitumen?), insert studded membrane, treat the plinth with sealing slurry
B) clean the area exposed for the gravel drip edge, seal, insert studded membrane (discharge water under the gravel with membrane?), treat the plinth with sealing slurry
C) leave the foundation as it is, create gravel drip edge
D) leave the foundation as it is, install drainage channel as splash protection
E) pave the courtyard directly against the house to divert water and omit drip strips
Is there a proven and durable procedure?
Thank you very much for your opinions.
Best regards
Michael
A few years ago we bought an old building (built in 1937) with an extension (1977). Now we want to redesign the courtyard and have it paved. A gravel drip edge is to be created along the house wall. According to the 1977 construction plans, the extension was built on natural soil (clay, slate, rock). The foundations are 100 cm deep, 30 cm wide, and made of rammed concrete B 160. The building is not basemented in this area. There have been no moisture problems so far. Rising damp is not apparent. The foundation has no flat surfaces. Below the masonry made of aerated concrete there is a horizontal leveling layer made of brickwork. The courtyard surface slopes down from the house to the terrain.
As a layperson, the question arises for me whether and how the foundations should/must be treated beforehand, if at all. Despite reading numerous posts, more questions than clarifications arose. Also regarding a possible foundation failure.
In my opinion, the following variants are conceivable:
A) completely expose the foundation, clean, seal (bitumen?), insert studded membrane, treat the plinth with sealing slurry
B) clean the area exposed for the gravel drip edge, seal, insert studded membrane (discharge water under the gravel with membrane?), treat the plinth with sealing slurry
C) leave the foundation as it is, create gravel drip edge
D) leave the foundation as it is, install drainage channel as splash protection
E) pave the courtyard directly against the house to divert water and omit drip strips
Is there a proven and durable procedure?
Thank you very much for your opinions.
Best regards
Michael