wrote in message
...
This is 400' of copper for baseboard heating there is about 100'
additional
3/4 and 1/2 inch hot water to faucets and shower....the crawl space is
insulated and the basement is not .... both get real cold in winter. tia

In that case, if you insulate heater feed portion in the basement it will
get even colder.

Insulating the tubing to the faucets will allow them to retain the heat
longer. Overnight it won't make much difference, but for shorter times
between use it may be a help so you don't have to wait for hot water to
wash.

In any case, it will be a long payback for $100.