Flat panels of wood which are attached to a home’s rafters to form the base of a roof. Underlayment and shingles are applied to the roof deck.



The first three feet along the bottom edge of a roof, measured from the fascia to the structure’s outside wall.



Metal strips placed around chimneys, pipes, vents, skylights and other roof protrusions, and along roof valleys that handle high water flow volume. Flashing prevents water leakage at the most vulnerable areas of a roof.


Ice and Water Shield

This waterproof barrier provides additional security against water infiltration along eaves, around roof protrusions, and along valleys.


Low Slope 

A roof with a pitch of less than 4:12. Special installation practices must be used on roofs sloped 2:12-4:12. Shingles cannot be installed on slopes less than 2:12.


Shingle Cap

A special shingle designed to cover the peak of a roof.


Starter Strip

Shingles designed to be installed along the roof’s edge to prevent water and wind intrusion.


Steep Slope

A roof with a slope higher than 4:12.



A felt or rubber membrane specially designed to act as a waterproofing layer over roof decking. This extends the life of roof decking by preventing wind-driven rain or water from leaking underneath shingles and causing rot.



The area on a roof where two sloped roof planes intersect, creating a v-shaped depression.



An important consideration to prolong the life of decking, shingles and other roof components. Proper attic ventilation prevents the build-up of excess heat and moisture.



A written guarantee that roofing materials or the installer’s workmanship will last for a certain length of time without problems. Campo recommends “no dollar limit” warranties where the manufacturer will cover replacement materials and labor for a defective roof without prorated values.