Sealing sill on added foundation
This may be a stupid question, but bear with me as I am doing this DIY. I am just completing a project adding a foundation and conditioned basement to my house. I poured the foundation wall up to the existing sill plate (actually 6×6 beam, house was originally post an pier construction). I did not use sill sealer or any gasket, as I thought that pouring the wall up to the beam would seal against air movement. But I didn’t consider wood shrinkage and expansion over time. Do you think that the periodic shrinkage of the beam will result in a gap that will allow airflow? I did include a capillary break between footing and foundation, as well as between footing and ground, so hopefully beam won’t be absorbing much moisture from the concrete after concrete cures.
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