1.   Underlayment is cardboard coated with a mixture of asphalt and lime.  This product is a secondary barrier and guards against any leaks that may occur due to wind-driven rains.

A.    Underlayment (4 squares per roll)
B.    #15 lb. Underlayment (4 squares per roll)
C.    #30 lb. Underlayment (2 squares per roll)
*Note: 15 lb. underlayment is standard in the roofing industry.

2.  Ice Shield or 90 lb. provides extra protection at vulnerable areas like valleys, eaves, chimneys, and skylights.

3.  Ventilation is an important part of the roof system. When properly balanced the ventilation system helps protect against premature deterioration of the shingles and decking (board or plywood).

4.  The valley is the V shape a roof makes. There are a number of ways to shingle a valley, but only one way to assure proper protection against leaks. Using a protective underlayment like Ice Shield or 90 lb. under a minimum 20-inch valley metal (standard) will give the protection the valley needs to fight any wind-driven rains or ice damming.

Three main ways to shingle a valley.
A.    W --Valley
B.    Open Valley
C.    Closed Valley

5.  Shingle color selection. For more information, view our information sheet on Selecting a Shingle Color.

6.  Flashing is used as a protective barrier to guard against rain. It is commonly found around chimneys, roofs that meet the house, and other areas vulnerable to leaks.

Most common flashings techniques:
A.    Step Flashing -- each shingle is flashed
B.    Continues Flashing - all the shingles run either over or under all of the flashing.

7.  Starter is the first row of shingles or sometimes referred to as the course. It is placed at the bottom of the eave and is used as a starting point in the application.

Most common starters:
A.    Starter Roll
B.    Starter Shingles

8.  Fasteners are one of the most important products used on the roof. Each shingle manufacturer has different specifications on what kind, where to fasten, and how long of fasteners to use.
Note: Check with your roofing contractor to see what specifications are required.

9.  Gutter Apron is a metal or aluminum product used to shed water INTO the gutter. It is found at the eave under the starter course.

10.  Roof Edge is found at the edges of the roof (where the roof ends). Its main purpose is to add detailing to the edges, and also to shed water away.