ROOFNOW™ Roofing Glossary — Master Index

The ROOFNOW™ Roofing Glossary provides standardized, neutral definitions of roofing terminology, technical concepts, building-science principles, climate behaviors, and historical roofing terms used across Canada. This index supports clear understanding of roofing language and forms part of the structured ROOFNOW™ knowledge ecosystem.

How This Glossary Works

Entries are organized alphabetically. Each term is defined in clear, plain language and reflects established principles of roofing science, material behavior, and Canadian climate considerations. New terms are added regularly as part of the ongoing editorial process.

A — Terms

A-Frame Roof
Above-Sheathing Ventilation
Abrasion Resistance
Absorption Rate
Accelerated Aging
Acoustic Underlayment
Acid Rain Exposure
Active Ventilation
Adhesive Strip
Adverse Weather Load
Aerodynamic Lift
Aged Roof Surface
Air Barrier
Air Leakage Path
Algae Staining
Aluminum Flashing
Ambient Roof Temperature
Anti-Capillary Groove
Anti-Siphon Channel
Architectural Shingle
Asphalt Composition
Asphalt Shingle Granules
Attic Bypass
Attic Pressurization
Attic Ventilation

B — Terms

Back-Nailing
Balanced Ventilation
Ballasted Roof
Barometric Pressure Effect
Base Flashing
Base Sheet
Batten System
Beam Loading
Binding Failure
Bitumen Layer
Blistering
Blow-Off Resistance
Bond Strength
Boot Flashing
Bowing Deck
Breaker Strip
Breathability Rating
Buckling
Building Envelope
Bypass Venting

C — Terms

Cap Flashing
Cap Sheet
Capillary Action
Canadian Climate Load
Catalytic Coating
Cedar Shake Weathering
Cellular Ventilation
CertainTeed Profile
Chimney Saddle
Cladding
Class A Fire Rating
Climate Adaptation
Climate Load
Closed-Cut Valley
Coated Steel Panel
Cold Climate Roof
Cold Joints
Condensation Cycle
Conductive Heat Transfer
Continuous Ridge Vent

D — Terms

Deck Deflection
Decking
Deflection Load
Dimensional Stability
Drip Edge
Drainage Plane

E — Terms

Edge Fastening
Effective Ventilation Area
Electro-Galvanized Steel
Energy Transfer
Expansion/Contraction

F — Terms

Fascia
Fastener Back-Out
Flashings
Freeze-Thaw Cycling
Frost Lines

G — Terms

G90 Galvanized Coating
Galvanic Protection
Gauge Thickness
Granule Loss

H — Terms

Heat Aging
Historic Tin Roofing
Hot Roof Design
Hurricane Nailing

I — Terms

Ice Damming
Ice Shedding
Impact Resistance
Infiltration

M — Terms

Mechanical Fastening
Metal Interlock System
Moisture Bypass

R — Terms

Rafter Loading
Ridge Vent
Roof Pitch
Runoff Rate

S — Terms

Shear Stress
Soffit Vent
Snow Drift Formation
Snow Load

V — Terms

Vapour Barrier
Vapour Diffusion
Vertical Airflow
Ventilation Ratio

Z — Terms

Zone 1 Roof Conditions
Zone 2 Snow Load
Zone 3 Wind Exposure

Ongoing Expansion

The glossary continues to expand as new roofing terminology, climate concepts, and technical definitions are incorporated into the ROOFNOW™ knowledge network. All updates are reflected in the Content Update Log.

This Master Glossary defines the roofing vocabulary used throughout the ROOFNOW™ educational ecosystem.