ROOFS

Question 1

create a roof slope (3)

Answer 1

slope structure

taper structure

taper insulation

Question 2

albedo vs emissivity

Answer 2

albedo: solar reflectance (sunlight int he visible spectrum)
emissivity: infrared spectrum (heat)

Question 3

In low sloped roofing, where should drains be placed?

Answer 3

At mid span, between structural supports

Question 4

Minimum slope of roof

Answer 4

2% - 1/4in per ft

Question 5

Steep roof

Answer 5

Over 2in per foot

Gravity sheds water quickly

Overlap small units

Question 6

Low sloped roofs

Answer 6

Slow drainage

Watertight membranes

Simpler geometry

Question 7

Low slope roofs membranes (3)

Answer 7

Bituminous (base sheet of asphalt saturated felt installed over rigid insulation)

Single-ply

Fluid-applied

Question 8

Roof shingles vs roof shakes

Answer 8

Roof shakes are thicker

Shingles: tapered and overlapping

Question 9

Ballast

Answer 9

Layer of gravel to hold down bituminous membranes - nos as common

Question 10

Types of roof metal seams (3)

Answer 10

Flat seams
Standing seam
Batten seam