Roof size - Cleaning Talk - Professional Cleaning and Restoration Forum

Bruce Stanley · 07-26-2006, 04:39 AM

I found this in the research I did a few years back when I started doing roofs thought it would help some others. Can't remimber where I got it from. But it is accuate.
For slopes of *****multiple the area by
4:12 ***************1.054
6:12 ***************1.118
8:12 ***************1.202
10:12 **************1.302
12:12 **************1.414

The slope of the roof is expressed as Rise:Run. A 4:12 roof rises 4 units vertically for each 12 units horizontally. This can be reasonably estimated by holding a ruler or tape measure at arms length while viewing the roof from the ground (from a distance, so that the angle up to the roof is not effecting the apparent ratio).

Barry M · 07-26-2006, 08:06 AM

Very helpful, thanks. I always muliplied by 1.3, I guess it was close. I also know of some who suggested multiplying by 1.5 according to your info that would be way to much.

russ s · 07-28-2006, 10:36 AM

hey thats good i usually just look at the sq footage of a home and guess the rest .... i never really looked that deep into trying to figure the actual square footage i just did it by size and difficulty

**Nathan** · 07-28-2006, 10:53 AM

Someone should write a quick calculator for that. It would probably be pretty easy.

russ s · 07-28-2006, 11:30 PM

whats a calculator????? we just scipher

Thad · 07-29-2006, 01:08 AM

"Naught times naught is naught.
Naught times one is naught.
Naught times two is..."

russ s · 07-29-2006, 08:28 AM

naught squared