"badgolferman" wrote in
:

Red Green, 11/1/2008,5:43:59 PM, wrote:

"badgolferman" wrote in
:

Roofer gave me a rough estimate of my roof size. 40 square is the
measurement. Is a square equivilent to a bundle of shingles? It
seems I can't get the terminology right while making a search.

Others have explained it. 40 square though? Quite a bit of roof. How
big a house is this?

Roughly 1800 sq. ft. rancher. Does that seem too much?

Yea it does considering the limited info we have. Also, when sq footage
of a house is stated for real estate purposes, that is only for living
space. Garages and outbuildings are not included.

Roughly, if you had a 24x40 two story, the living space is 24x40x2=1920
sq ft. For roofing purposes it's VERY ROUGHLY 1000 sq ft. Waste,
overhangs, pitch, valleys, etc. have to be taken into consideration. 1000
is really way shy. See later in this post. Just trying to give you a feel
for it.

This is all very rough but let's say your ranch is ONE story with 1800 sq
ft. If it were 24 deep it would have to be 75ft long. Assume a 2ft
overhang all around which comes to 75+75-24+24 or about 200 linear ft.
200*2ft wide=400 sq ft for overhang. So far we have 1800 house+400
overhang=2200sf total. Give 10% for waste and 10% for pitch. 2200+220+220
=2640sf (27 square) for one level house with no garage.

Let's add in a 24x24 garage with the same assumptions.
garage 24x24=576sf
overhang 24x4x2=192sf
garage roof total about 775sf
waste & pitch add 20% - 775*1.2=930sf (about 10 square)

So the house and garage is 2640+930=3570. Now we are talking 36 square
which says 40, as a guess, is possible. But if your place is two story
then 40 square is way off.

Two story 24x40 with 2ft overhang.

House 24*40=960sf of roofing
Overhang (24+24+40+40)*2=256sf
waste & pitch (960+256)*1.2=1459sf or 15 square.

Add in that garage and it's 15+10=25 square.


Let's see if I made some stupid blunder here. I'm sure someone will point
it out! :-)