Hi, I'm considering demolishing the lower part of the sunroom (see pictures) as there is a lot of rot damage, etc. I'm going to replace it with concrete blocks which will then be plastered.

The sunroom stands on a cast slab, which according to the previous owner is insulated and 10 cm thick.

I'm wondering how I should handle the wood facade against the blocks, should I just seal it with some sealing tape?

And do you recommend putting builder's felt between the concrete blocks and the slab?

I'm also considering building all the way out to the slab since it currently sticks out a bit (sometimes collects water).

Thankful for any answers
 
  • Close-up of a weathered wooden porch corner with peeling paint, showing a white window frame below and a ventilation grille above.
  • Outdoor sunroom corner with wooden siding, two empty wooden planters, a metal trellis, and a wooden ladder leaning against the wall.
  • Outdoor wooden siding under windows with two black wire chairs, a rusty candle holder, and a brown glass bottle on gravel, part of a renovation discussion.
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