Advice for keeping a new addition basement dry
We are adding on to a 1960s house in Eastern MA. This will include a full height basement.
Our existing basement is dry. We are well above nearby rivers and ponds but in a slightly low spot of the surrounding houses. Only real water concern I have is when we get a layer of frozen snow followed by a long rain causing ponding on the snow in the backyard. This is rare and has never ponded up to the house, but who knows someday.
Normal rain/thunderstorms haven’t been a problem.
What detailing should be included on the new foundation to keep the basement dry? An interior or exterior foundation drain? Both? Neither? We cannot run a foundation drain to daylight given the lot. And bringing water from an exterior foundation drain to an interior sump pit seems counterintuitive, though that’s the advice I’ve seen here sometimes.
What’s the line for dampproofing vs waterproofing? I’ve heard waterproofing is less common here away from the coast.
Any advice is much appreciated.
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