ᐅ Retrofit horizontal damp-proof course in basement wall made of concrete blocks
Created on: 24 Feb 2019 13:30
T
TrekrubHello,
soon the exterior of the basement walls of our house (built in 1963) will be excavated and waterproofed (reactive curing, two-component thick coating, including a cove fillet, waterproof slurry, primer, filler putty, leveling putty, perimeter protection, etc.). So far, I have not had issues with rising damp, but every 4-5 years there is some moisture on the walls caused by the layer water occurring here. During heavy rain in 2017, water also came in around the sewer pipe and at one spot in the heating cellar. The pipe will therefore be replaced, including a new wall sleeve seal. The basement wall is about 30cm (12 inches) thick and consists of concrete hollow blocks (CHB) and has a horizontal damp-proof course made of roofing felt, which surely will not remain intact for many more years.
Since the basement walls will already be excavated, I would like to have a new external horizontal damp-proof course installed proactively, as I cannot reach all basement wall areas from the inside (such as behind lining walls, plinths, etc.).
From what I have read, two pressure-free injection systems could be suitable for hollow blocks (because pressure injection forces a large amount of material into the blocks or the cavities would have to be painstakingly filled first):
1) Solvent-free resin/silane injection creams (also called "dry zone" or ...946 injection cream)
2) Thin, concentrated, solvent-free synthetic resin injected via capillary rods
Does anyone have experience with such retrofit horizontal damp-proof courses in hollow block basement walls and can recommend or advise against one of the two materials mentioned above (or suggest an alternative)?
soon the exterior of the basement walls of our house (built in 1963) will be excavated and waterproofed (reactive curing, two-component thick coating, including a cove fillet, waterproof slurry, primer, filler putty, leveling putty, perimeter protection, etc.). So far, I have not had issues with rising damp, but every 4-5 years there is some moisture on the walls caused by the layer water occurring here. During heavy rain in 2017, water also came in around the sewer pipe and at one spot in the heating cellar. The pipe will therefore be replaced, including a new wall sleeve seal. The basement wall is about 30cm (12 inches) thick and consists of concrete hollow blocks (CHB) and has a horizontal damp-proof course made of roofing felt, which surely will not remain intact for many more years.
Since the basement walls will already be excavated, I would like to have a new external horizontal damp-proof course installed proactively, as I cannot reach all basement wall areas from the inside (such as behind lining walls, plinths, etc.).
From what I have read, two pressure-free injection systems could be suitable for hollow blocks (because pressure injection forces a large amount of material into the blocks or the cavities would have to be painstakingly filled first):
1) Solvent-free resin/silane injection creams (also called "dry zone" or ...946 injection cream)
2) Thin, concentrated, solvent-free synthetic resin injected via capillary rods
Does anyone have experience with such retrofit horizontal damp-proof courses in hollow block basement walls and can recommend or advise against one of the two materials mentioned above (or suggest an alternative)?
Similar topics