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Is the pipe under the driveway perforated?
yes, at the lower part away from the driveway, not right under
If the section under the driveway is not perforated then you don't need to sleeve the pipe unless it's so close to the surface that the new concrete will come in contact with it
Using a bonding agent is a good idea
the pipe on the horizontal part in under the gravel base. the only part that will come in contact with the cement is the part connecting to the downspout
You can use foam pipe insulation to keep the concrete away from the pipe. I'm assuming this is a vertical penetration. If you use a larger diameter pipe then your concern about water freezing in the gap is warranted
This is a vertical penetration. I will try the foam around the pipe
I this case since this is only a downspout it
It's not critical that you sleeve the pipe where it penetrates the concrete
If this was a water line or a house hold drain which is subject to a lot of expansion and contraction then sleeving is critical
That is good feedback...thanks
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Putting new sheetrock in bathroom. old house had to