i'm laying a concrete base (120mm wide) which will extend approx 50mm above ground level for a 100mm wide wooden frame to sit on outdoors in the garden.
will a DPC between the two protect the tanelised wood from the damp in the concrete?
(its only a chicken run - but i have some 100mm DPC i could use
Technically the wood should be 150mm above the ground level, and should sit on a DPC. This is because anything below 150mm above GL is susceptible to getting damp from water splashing up.
To answer your question directly: Yes, the DPC will protect the wood from the moisture in the concrete, but it will still be subject to other types of moisture, as mentioned above.
It's tanalised for a reason!
Tanalised wood is still susceptible to mould growth and surface deterioration caused by moisture.
for a chicken run it'll be fine and use a dpc if you've got it.
I put a few 'sacrificial' strips of tanelised wood under my shed beams (at 90 degrees to the ones on the shed floor to help air circulate) - if there are any issues I can just replace them rather than the shed floor.
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