ᐅ Garage attached directly to a single-family house. Is the foundation sufficient?
Created on: 22 Mar 2011 13:29
P
perlenmann
Hello,
We are now close to starting construction on the house. Now the question is whether I should have the general contractor, as he suggests, create a foundation along the house wall. For a 9m (30 feet) garage, he wants to install three 30cm (12 inches) diameter foundation piles (which would cost around 1000€).
Wouldn't it be sufficient to have the garage company create a strip foundation instead?
We are now close to starting construction on the house. Now the question is whether I should have the general contractor, as he suggests, create a foundation along the house wall. For a 9m (30 feet) garage, he wants to install three 30cm (12 inches) diameter foundation piles (which would cost around 1000€).
Wouldn't it be sufficient to have the garage company create a strip foundation instead?
P
perlenmann31 Mar 2011 14:57So, I got in touch with my neighbor. He has it like this: 3 supports with a diameter of 30cm (12 inches) and a depth of 3m (10 feet) directly next to the house. Additionally, there is a strip foundation. This way, it avoids having to compact the excavation next to the basement wall layer by layer.
Is this really necessary?
Is this really necessary?
Hello,
that sounds plausible in any case. The foundation of the garage must be established on uniformly load-bearing soil. In the area next to the house wall, the soil was previously excavated and then backfilled. The backfill will settle more under the weight of the garage (meaning the soil will compress more) than on the side where the soil has not been disturbed (natural soil). Different settlements of the garage on both sides can cause significant settlement damage (cracks), which can even threaten structural stability.
Therefore, the loads on the house side must be transferred into the undisturbed subsoil, which is at the level of the basement floor slab. The option to do this with three concrete columns each is basically reasonable. A structural engineer must calculate this.
Best regards
that sounds plausible in any case. The foundation of the garage must be established on uniformly load-bearing soil. In the area next to the house wall, the soil was previously excavated and then backfilled. The backfill will settle more under the weight of the garage (meaning the soil will compress more) than on the side where the soil has not been disturbed (natural soil). Different settlements of the garage on both sides can cause significant settlement damage (cracks), which can even threaten structural stability.
Therefore, the loads on the house side must be transferred into the undisturbed subsoil, which is at the level of the basement floor slab. The option to do this with three concrete columns each is basically reasonable. A structural engineer must calculate this.
Best regards
P
perlenmann18 Apr 2011 16:06I contacted the garage specialist again. He says a 9 x 3 m (29.5 x 9.8 ft) garage with an electric door opener and the electrical package costs about 8,800 plus a strip foundation for 1,400 euros.
I would only pay 2,500 euros for the foundation.
I find that really expensive!
Can anyone share their experiences with garage companies?
I would only pay 2,500 euros for the foundation.
I find that really expensive!
Can anyone share their experiences with garage companies?
B
Bauexperte18 Apr 2011 18:58Hello,
If this offer includes a sectional door as well as a door to the garden and a small window, the price is absolutely fair. It will only be cheaper if you build the garage yourself – but for this, your general contractor must pour a slab foundation (about 80 euros per square meter (9.3 sq ft)) or you go for a simple prefabricated garage made of lightweight steel profiles.
Kind regards
Perlenmann schrieb:
I contacted the garage specialist again. He says the 9x3 meter (29.5x10 feet) garage with electric drive and the E package costs about 8800 plus strip foundation for 1400 euros
If this offer includes a sectional door as well as a door to the garden and a small window, the price is absolutely fair. It will only be cheaper if you build the garage yourself – but for this, your general contractor must pour a slab foundation (about 80 euros per square meter (9.3 sq ft)) or you go for a simple prefabricated garage made of lightweight steel profiles.
Kind regards
P
perlenmann19 Apr 2011 08:34It’s a garage with an extension of over 6m (20 feet) plus 3m (10 feet). There is a door to the garden included, but I don’t want windows.
What are the advantages and disadvantages compared to a steel garage?
I checked yesterday, and it costs about $4,000 for that size.
What are the advantages and disadvantages compared to a steel garage?
I checked yesterday, and it costs about $4,000 for that size.
P
perlenmann19 Apr 2011 09:30Oh, the sectional garage door is not included. It’s getting too expensive for me. I saw somewhere that it costs about 600€ extra! Is that correct?
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