"PrecisionMachinisT" wrote in message
...

"Doug Miller" wrote in message
...
In article GlFoe.65832$sy6.49998@lakeread04, "twfsa"

wrote:
How do you figure the sq. footage of a hip roof, I am curious as to how
many
squares will be needed to re-roof my house?

Is there some reason you can't go up on the roof with a tape measure?


Can usually be done from the ground--count the number of rafters along the
gutter line, these are typically set onto 16in centers.

To get your height, count how many courses of shingles there are going up
to
the peak, asphalt shingles are generally nailed with a 5in tab exposure.

Area of triangle is 1/2 base X height, as has already been pointed out.

--

SVL



Yeah, but what about the area of a trapeziod for the long sides?