I need help with some construction questions?

Average, now days not much is.

I will call average, a 4/12 pitch.

It means that for every horizontal foot, the roof goes up 4 inches.

Example, take two 12 inch wooden rulers.

Lay one of them down on a table with the "0" towards your left and the 12 inch mark to the right.

Stand the second ruler vertical at the right end of the ruler on the table, measure up 4 inches on the vertical ruler.

If you stretched a string between the "0" mark of the first ruler and the 4 inch mark on the vertical ruler, you have a 4-12 pitch.

Residential homes can have roof pitches from a flat roof to 9-12 pitch and even steeper.

The commercial buildings can be in that range also.

The flatter pitches like th 4-12 are easier to work on and drain rain water well.

You can stand on them without a rope.

The steeper pitches like the 9-12, drain water even better, but are much harder to

construct and maintain. safety harness etc, yak, yak.

Roof pitches are mostly cosmetic, and just look good.

Flat roofs, zero pitch, are notorious for water leaks.

The steeper the pitch, usually the longer the shingles last.

I think I hit all of your questions, email me if you need more.

Wingman