Yes. They're thicker, which adds weight to the roof--and the heavier a roof is, the better because heavier roofs cut down on wind noise. They also have better warranties; a very good warranty on a three-tab shingle is 25 years, but the cheapest architectural shingle on the market has a 30-year warranty. With the added windload resistance and not all that much higher price, I think they're well worth it.
They are shingles that are thicker than the regular 3-tab shingles, so they stand out better on the roof and create a nicer look. The 'dim' stands for dimensional, as an additional dimension to a flat tabbed shingle.
26 shingles in a bundle of three tab asphalt shingles
certainly, cut them 12" wide
How many bundles of 3-Tab Shingles are needed to cover 80 square feet?
Low end $75 per square for standard 3 tab shingles
Better than usal
26 / 56 reroof
3200
About 80 lbs.
galaxy tab 2 is better than ipad because it has its own grafics and it is in range
each bundle does 33.3 sq ft.
225 LBS