Red wrote:

Since I moved in to new home in 2004, we have had roof shingle problems
every year. First year some blew off, many loose. Since then we have had
loose shingles everytime there is a storm. Yet the winds are not that high
in my opinion, say 40mph gusts.

Today, we had a storm and now I can see a dozen or so loose shingles
flapping up and down. Last year I was told it was last time they would
repair the shingles on my roof. The forman and all but said the shingles are
a bad batch as the same is happening to other homes where the roofs were put
up around the same time as mine. So should I push for a complete new roof?

Yes, because the foreman admitted that the shingles were defective,
meaning the home builder, roofing contractor, or shingle manufacturer
has to pay for a new roof, and quite possibly your home insurance
company will insist on one. Get something in writing saying the
shingles were made incorrectly, preferrably a technical bulletin by
the shingle maker. Any reputable builder, roofer, or shingle
manufacturer will provide this. Thoroughly photograph the roof, both
in its entirety and where shingles are loose or missing, and don't
remove any nails (but do photograph them with a ruler to show how far
they penetrated) Keep all shingles that have fallen off (evidence),
and don't separate such shingles if they came off in one piece. I
can't imagine even the worst 5 YO shingles blowing off in just 40 MPH
wings, especially since I've had 15-20 YO roofs, made with the
cheapest fiberglass-asphalt shingles that had turned brittle and lost
25-50% of their protective granules, withstand 60 MPH steady winds w/
100 MPH gusts and lose only some of their exposed tabs (cracked off).
On the other hand I've seen shingles that had been attached with nails
too short to penetrate the sheathing zipper off in one piece, and
stapled shingles usually detach with all their staples still
attached. Staples don't hold nearly as well as roofing nails, despite
making making twice as many piercings in the sheathing and having a
glue coating, and many municipalities in high-wind areas prohibit
them. Insist that any replacement roof be installed by a factory
authorized contractor and with 6 nails per shingle rather than the
usual 4.