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demoncleaner12 Jul 2017 08:19Our house has been completely renovated. However, several things did not go as they should have. I’m probably not the only one who has experienced something like this.
That said, there is one issue that interests me in particular because it involved material costs that I consider far too high.
A drainage system was installed along the 14m (46 feet) long front side of the house. It is about 1m (3 feet) deep and 50cm (20 inches) wide. The foundation was sealed with a special coating, a plastic layer was applied in front of it, and the trench was filled with gravel. Of course, there is a pipe with a filter at the bottom, approximately 120mm (4.7 inches) in diameter. So far, so good. We also have a second drainage system at the back of the house near the garage. However, the property slopes slightly, so I wonder whether this drainage is even necessary since water basically flows away from the house or garage into the garden. This drainage runs “in the shadow” of the house, parallel to the slope, along the garage wall. Here, the pipe is placed at a depth of about 80cm (31 inches) in a 50cm (20 inches) deep gravel bed, and the rest is simply backfilled with soil. I find this problematic and don’t understand why it wasn’t completely filled with gravel like the front. The soil is also not compacted. My understanding is that if grass doesn’t grow quickly over it, we will likely have a small muddy runoff by the house during the next heavy rain.
But here is my main question. In both cases, the pipe runs away from the house, covering about 10m (33 feet) of length. This section is also filled with gravel in the trench, and the upper 40cm (16 inches) is just backfilled with soil. Does this make sense? I thought the gravel was primarily meant to allow water, such as rainwater directly reaching the wall from the roof, to seep through into the pipe, which then directs water away from the house. Having a backfilled shaft with gravel in the garden… I’m not sure. The idea is that no more water should infiltrate there in the garden. Am I wrong? This concerns me mostly due to the material costs. We incurred quite high expenses for the gravel, and the price and volume paid don’t add up at all. (Not to mention the labor costs.) Fourteen man-days for excavating, preparing, and filling about 40m (131 feet).
Furthermore, it appears it must rain quite heavily before any water actually comes out from the pipes at the back. I get the impression the drainage system(s) are not very efficient. So far, the ground remains completely dry.
It would be great if someone experienced with this could provide some information.
That said, there is one issue that interests me in particular because it involved material costs that I consider far too high.
A drainage system was installed along the 14m (46 feet) long front side of the house. It is about 1m (3 feet) deep and 50cm (20 inches) wide. The foundation was sealed with a special coating, a plastic layer was applied in front of it, and the trench was filled with gravel. Of course, there is a pipe with a filter at the bottom, approximately 120mm (4.7 inches) in diameter. So far, so good. We also have a second drainage system at the back of the house near the garage. However, the property slopes slightly, so I wonder whether this drainage is even necessary since water basically flows away from the house or garage into the garden. This drainage runs “in the shadow” of the house, parallel to the slope, along the garage wall. Here, the pipe is placed at a depth of about 80cm (31 inches) in a 50cm (20 inches) deep gravel bed, and the rest is simply backfilled with soil. I find this problematic and don’t understand why it wasn’t completely filled with gravel like the front. The soil is also not compacted. My understanding is that if grass doesn’t grow quickly over it, we will likely have a small muddy runoff by the house during the next heavy rain.
But here is my main question. In both cases, the pipe runs away from the house, covering about 10m (33 feet) of length. This section is also filled with gravel in the trench, and the upper 40cm (16 inches) is just backfilled with soil. Does this make sense? I thought the gravel was primarily meant to allow water, such as rainwater directly reaching the wall from the roof, to seep through into the pipe, which then directs water away from the house. Having a backfilled shaft with gravel in the garden… I’m not sure. The idea is that no more water should infiltrate there in the garden. Am I wrong? This concerns me mostly due to the material costs. We incurred quite high expenses for the gravel, and the price and volume paid don’t add up at all. (Not to mention the labor costs.) Fourteen man-days for excavating, preparing, and filling about 40m (131 feet).
Furthermore, it appears it must rain quite heavily before any water actually comes out from the pipes at the back. I get the impression the drainage system(s) are not very efficient. So far, the ground remains completely dry.
It would be great if someone experienced with this could provide some information.
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