Cottage foundation with a cast uninsulated slab at the bottom..?
No, pillars that are buried, cast on site or similar. Then a geotextile and crushed stone between the pillars.
On the pillar rows, you build a floor framework as usual, but with some adaptation in the sub-floor (minerit and treated planks as support for the sub-floor panel.
It is then fully ventilated outside, possibly with a simple trellis or similar as snow protection.
http://www.traguiden.se/konstruktio...grundlaggning/grundlaggning/oppen-plintgrund/
On the pillar rows, you build a floor framework as usual, but with some adaptation in the sub-floor (minerit and treated planks as support for the sub-floor panel.
It is then fully ventilated outside, possibly with a simple trellis or similar as snow protection.
http://www.traguiden.se/konstruktio...grundlaggning/grundlaggning/oppen-plintgrund/
Okay nobody has
Okay, no one has really commented on an uninsulated slab with floor joists 60cm above the slab.
If we ignore the economics, is this a good construction or a risk construction comparable to a crawl space foundation?
If we ignore the economics, is this a good construction or a risk construction comparable to a crawl space foundation?
I have also been thinking about that if you disregard the costs, it should be perfect conditions with a cast slab under the crawl space foundation, which gives the same advantage as a basement but without the same problems with intrusive moisture.
Would be very interesting with someone knowledgeable in the area.. 
What we "knowledgeable" ones do not understand is what function the cast slab is supposed to serve.
An explanation of this is what we want to see.
Even if you already have a concrete truck out there, there are still costs associated with the slab.
Substructure, digging, gravel/crushed stone, reinforcement, edge elements...
As mentioned, why :x
An explanation of this is what we want to see.
Even if you already have a concrete truck out there, there are still costs associated with the slab.
Substructure, digging, gravel/crushed stone, reinforcement, edge elements...
As mentioned, why :x
I plan to have a backhoe working on the site almost cost-free in any case.
I'm thinking that an uninsulated slab with a floor framing 60cm above the slab eliminates the moisture issues associated with a traditional crawl space?
Not thinking of edge elements but rather wooden formwork onto which you then brick 3 rows of lightweight clinker.
The only difference in costs I really think is a bit more concrete and a bit more crushed rock?
I also have a lot of 10cm foam lying around, not sure how I could best use it...
I'm thinking that an uninsulated slab with a floor framing 60cm above the slab eliminates the moisture issues associated with a traditional crawl space?
Not thinking of edge elements but rather wooden formwork onto which you then brick 3 rows of lightweight clinker.
The only difference in costs I really think is a bit more concrete and a bit more crushed rock?
I also have a lot of 10cm foam lying around, not sure how I could best use it...
It is not rising ground moisture that is the main concern with crawl spaces. It is the ventilation with cold outside air.
So a crawl space with an uninsulated slab is basically not a bit better than "regular" ground underneath.
Therefore, for a crawl space, it's either a dehumidifier or a heated foundation that is required.
So a crawl space with an uninsulated slab is basically not a bit better than "regular" ground underneath.
Therefore, for a crawl space, it's either a dehumidifier or a heated foundation that is required.
Okay, leaning towards an isolated slab instead and steps up to the rest of the apartment.
I'm thinking of using L elements in the 2 new exterior walls. Can I just pour concrete directly against the old exterior walls on the other 2 sides?
How do I then insulate the old foundation walls? With a new wall on the inside insulated with, for example, mineral wool?
I'm thinking of using L elements in the 2 new exterior walls. Can I just pour concrete directly against the old exterior walls on the other 2 sides?
How do I then insulate the old foundation walls? With a new wall on the inside insulated with, for example, mineral wool?
If I imagine a slab on the ground but want to raise the floor level about 60cm from the ground in the picture, how do you do that?
You cast a foundation plinth, then fill with crushed stone in the foundation frame up to about 300mm below floor level, 200mm of foam insulation, and a 100mm concrete slab. Drainage as usual at the level of the foundation's lower edge.
http://www.byggatill.se/Grundlaeggning.html
http://www.byggatill.se/Grundlaeggning.html
Okay, leaning towards using L-elements after all, the height probably fits reasonably. How are these placed, do you need to backfill the L-elements in some way or do you just place them out? Can the L-elements stand at ground level or must they be deeper?
I plan to use L-elements only on the 2 sides that do not have adjacent buildings. How should I proceed with adjacent buildings? Can I pour concrete next to this foundation, or should I insulate here in some way? One adjacent building has a crawl space (long side) and the other building has an uninsulated slab on grade (short side).
Complicated post but hope you understand what I mean...
I plan to use L-elements only on the 2 sides that do not have adjacent buildings. How should I proceed with adjacent buildings? Can I pour concrete next to this foundation, or should I insulate here in some way? One adjacent building has a crawl space (long side) and the other building has an uninsulated slab on grade (short side).
Complicated post but hope you understand what I mean...
Search on YouTube about casting slabs. There you will find videos and answers. But yes, the L supports should be backfilled on the outside with at least 50% height with macadam, otherwise the form risks breaking when the concrete is poured.