On Tue, 13 Mar 2018 05:07:09 -0700 (PDT), Robert11
wrote:

Hello,
Live outside of Boston.
Will probably go for a new roof in the Spring.
How "necessary" or desirable is it to remove the old
shingles first ?
Seems like it would be a much bigger job if we have the Contractor
remove the old (25 years old, but still fairly good; no curling, etc.)
ones first.
What are the pros and cons, please ?
What else should I be asking the Contractor ?
e.g., what "grade" of Shingles for up here in New England ?
I imagine most of the cost is the labor; right ?
That Rubberized sheet I think the use as a matter of course:
How far back up the rood should it extend ? Further is better ?
etc., etc. ?
Thanks, appreciate your opinions,
Bob




https://inspectapedia.com/BestPracti...le_Re_Roof.php

: get several detailed estimates and talk with the contractors about
everything - they can be a good resource - or their inability to
answer your questions can be a red flag. Sometimes the estimator is
more of a salesman - rather than a tradesman !
: don't just consider the shingles - eave starter; flashing;
ventilation, repairs - are all important too.
: beware of the contractor who can "start next week" .. the good
ones are usually busy & booked up .
You could visit your local building supply store in advance just to
compare and calculate the cost difference of the materials -
we were shown 3 grades of shingles - the lowest grade was quite
inferior - thin light flimsy - the contractor showed it as a warning
- not as an option.
John T.