ᐅ Affordable Garage – Standard Concrete Garage?

Created on: 19 Jul 2016 14:11
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ElBoCaDiLlO
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ElBoCaDiLlO
19 Jul 2016 14:11
Hello everyone,

Our house is almost finished, but we still don’t have a garage. The reason is, in my opinion, the costs for one are way too high.
Now I would like to get some input from you.

Key data:
Exterior dimensions of the garage: 4.17m x 9m (13.7 ft x 29.5 ft)
3m (9.8 ft) sectional door with electric opener
Opening of 1m x 2m (3.3 ft x 6.6 ft) for an entrance into the house
Door to the garden + one window at the rear of the garage

The garage is located between our house and the neighbor’s garage. Therefore, I want to make full use of the space, which rules out a standard, off-the-shelf garage.

How can I build an affordable garage? A custom concrete garage would cost me around 20,000€ and I consider that quite expensive.
Would it be enough to pour pad foundations, set up 12cm (4.7 inch) posts, and simply brick up the spaces between them? Maybe also add a 20cm (7.9 inch) concrete layer underneath? (The ground would be vibrated/compacted, of course.) Or should I have a strip foundation installed, or pour a slab? If I use a strip foundation, how thick should the concrete layer in the middle be if I don’t want to pave or lay tiles on top? Would I still need to pour a screed over that? The strip foundation should be about 80cm (31.5 inch) deep — how wide should it be if I use 11.5cm (4.5 inch) thick bricks for masonry?

How big is the price difference between a wooden beam ceiling and a cast concrete ceiling?

Basically, I just want a garage that will last longer than 10 years. From the outside, it should simply be plastered, at least on the visible surfaces.

I hope you can help me out a bit. I’m happy to provide further information.

Best regards
ein belegtes Brötchen
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86bibo
19 Jul 2016 14:22
First of all: Couldn’t you just use a standard 4m (13 feet) garage and finish the gap to the neighbor with cladding or plaster?
Pad foundations for masonry and/or a solid slab are not advisable. Strip foundations will probably need to be about 30cm (12 inches) wide because otherwise, a mini excavator cannot dig them. If you plan to dig by hand, 20cm (8 inches) might be enough, but that depends significantly on your slab. They don’t necessarily need to be 80cm (31 inches) deep. Possibly 60cm (24 inches) could be sufficient, but that depends on other site conditions.
You will have to decide how the interior of the garage should be finished. Of course, you can use paving stones, but concrete or tiles are also possible. If you use plain concrete, it needs to be poured relatively smoothly (which is not a given). A precast element is probably too expensive for your irregular dimensions.
Calculate all the costs carefully. If you really want something solid, it will cost a lot in materials and labor, at least if you don’t have much experience.
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ElBoCaDiLlO
19 Jul 2016 14:47
Hi 86bibo,
thank you for your quick response. Unfortunately, I haven’t found any prefabricated garages with a width of 4m (13 ft). They are always a maximum of 3.78m (12 ft 5 in) wide, which leaves quite a wide gap. Above all, the neighbor’s garage is not aligned at the same level but set further back. However, that wouldn’t be such a big issue.
I understand the point foundations and walls. What other options are there to clad the garage? I don’t mind wood as a building material, but the exterior should always be plastered (or maybe clad with facing bricks), as wood simply doesn’t suit as an outer material.
Regarding the interior structure: I was thinking that if I make a strip footing, I could raise it a bit higher and pour another layer of concrete over the floor, so it looks like a slab foundation but thinner in the middle… does that make sense and is it understandable?

Thank you very much and best regards
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86bibo
19 Jul 2016 14:53
Without sufficient reinforcement, it doesn’t make sense, but in principle, you can simply pour a concrete slab. However, don’t just throw in some rebar, mix the concrete, and hope it holds.

If you can or want to do the brickwork yourself, I would recommend wood, since you can handle that on your own. The only exception is the lintel above the garage door, where you will likely need professional assistance because you won’t be able to lift it manually. Wood allows for a lot of flexibility, but it requires the right tools and experience. The wood also needs to be properly treated, and you will need suitable posts; structurally, it is more complex as well. In my opinion, the classic brick wall is much easier for a beginner to carry out.
RobsonMKK19 Jul 2016 15:31
Hello,
I have just received quotes from manufacturers who build timber frame garages (similar to prefab houses).
There were quite attractive offers that were significantly cheaper than a concrete garage.

Could this possibly be an alternative?
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ElBoCaDiLlO
19 Jul 2016 15:39
Hi Robson,

For that, I will definitely need either a concrete slab or a strip foundation. This is also important for me as long as I can have the structure plastered afterward. Wood on the outside simply doesn’t match the overall look. However, if I understood 86bibo correctly, a timber frame garage like that is even more complex to build.

Could you tell me where you got your quotes?

Best regards