On Jul 12, 11:16*am, Jon wrote:
* What are the major differences in installing 30-yr. shingles as
opposed to 20-yr ones? *I would like to replace mine with 30-yr. and do
the labor myself but only have experience with the standard flat three
tab * 20 yr. style.

Architectural shingles will withstand hail storms much better (up to a
certain point) because they are thicker and cushion the impact.

KC