Sills & Cold Storage - Which option is recommended?

[Kalle91]

Hello!

I am planning to soon renovate a cold storage area of about 30 sqm. The storage currently stands on a concrete slab with sills directly on the slab, and a metal sheet that runs under the panel down into the ground to protect the sill from rain outside. However, there is likely no protection against moisture coming from underneath, from the concrete.

I want to keep costs down, but at the same time build something sustainable and properly executed. Therefore, I have come up with two options and wonder which you would choose in my case:

Option 1 – Probably the most sustainable option but perhaps a bit overambitious?
Place concrete blocks directly on the concrete, then sill flashing on top of the blocks, and then a sill of regular (non-treated) lumber.

Option 2 – A simpler solution:
Place sill flashing directly on the concrete, then the sill on top, and fold up the flashing to protect the sides of the sill.

What would you recommend? Is it worth spending extra time and money on concrete blocks, or is option 2 good enough?

Thanks in advance!

 

[klaskarlsson]

Hello!

I am planning to soon renovate a cold storage room of about 30 sqm. The storage room currently stands on a concrete slab with sill plates directly on the slab, and a metal sheet running under the panel and into the ground to protect the sill from rain outside. However, there is likely no protection against moisture coming from underneath, from the concrete.

I want to keep costs down, but at the same time build something that is durable and correctly executed. I have therefore landed on two options and wonder which you would choose in my case:

Option 1 – Probably the most durable option, but maybe a bit overambitious?
Lay leca blocks directly on the concrete, then sill paper on top of the leca blocks, and then a sill of regular (non-impregnated) wood.

Option 2 – A simpler solution:
Lay sill paper directly on the concrete, then the sill on top, and fold up the paper to protect the sides of the sill.


What would you recommend? Is it worth spending extra time and money on leca blocks, or is option 2 good enough?


Thank you in advance!

What the leca blocks would add is a more durable "bottom part", I assume, right? Do you have problems with the panel low down?
In that case, it might be a good idea. It's probably not much more work if you have to lift the shed anyway, etc. But otherwise, sill paper should suffice.

 

[Kalle91]

What the lecablock would add is a more durable "base" I guess? Do you have problems with the panel lower down?
In that case, it might be a good idea. It's not much more work if you have to lift the shed anyway. But otherwise, a sill paper should be enough.

I thought the purpose was mostly to raise the sill 10-20 cm above ground level as extra protection. But maybe it's not needed in this case. Realized that the Leca must be plastered as well? Maybe I'll go with the simple version with sill paper on the concrete, the sill on top, and then use Platon mat under the outer panel and down into the ground as extra protection. Should be more than enough?