Window Sill Question
1st time homeowner here. I've made custom pine window sills for my house and have the casing/moulding cut to length too. That was the easy part.
My house is pretty old, and the window slabs are concrete block and ARE NOT level. Often they are about 1/8 - 1/4" lower than the drywall (see picture). Because they're uneven, putting a piece of thin plywood under the wooden sill is out of the question.
Any pro tips for ensuring a flat window sill on concrete block?
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