Metal Roofing &
Fencing Insights.
Practical guides for Ontario homeowners on standing seam roofing, metal fencing, weather protection, and premium exterior upgrades.
153 articles in Metal Roofing — page 4 of 7
Insulation and Metal Roofing: Vented Attics vs Cathedral Ceilings
A vented attic separates insulation from the roof. A cathedral ceiling does not, and every problem gets harder. What changes between the two, and why the eave is where both of them fail.
Replacing a Single Damaged Panel in the Middle of a Metal Roof
Metal panels interlock and install in sequence, which makes replacing one in the middle of a roof more involved than it looks. What is possible depends on the system you have.
Aluminum vs Steel vs Copper Eavestrough: Choosing the Material
Three materials, three very different behaviours in an Ontario winter. Dent resistance, corrosion, thermal movement, galvanic compatibility with a metal roof, and how to choose between them.
How Wind Uplift Actually Works, and Where Roofs Fail First
Wind does not push a roof off. It pulls. Uplift is a pressure difference, the suction is worst at corners and edges, and failures almost always start at the perimeter and spread inward.
Why Coil-Coated Metal Outperforms Field-Painted Metal
The same colour applied two ways produces two completely different results. The difference is pretreatment, film control and an oven — none of which exist on a job site.
Rooftop Equipment on Metal Roofs: Curbs, Penetrations and Mechanical Units
Every rooftop unit, vent and pipe is a hole in a roof designed to move water. How curbs, crickets and movement-tolerant flashings keep penetrations from becoming the building's leak list.
Corrugated Metal Roofing Profiles and Where They Still Make Sense
Corrugated, 5V, ag rib and R-panel are not one product. Each has different span, different lap behaviour and a different minimum slope, and each still has real applications.
G90 Galvanizing Explained: What the Number Means and What It Does Not
G90 is a coating weight in hundredths of an ounce per square foot across both faces — not a grade, not a warranty, and not the same thing as hot-dip galvanizing a fabricated part.
How Long a Metal Roof Lasts, and What Actually Determines It
Metal roofs are long-lived, but the number depends on the substrate, the coating, the detailing and the environment. Here's what genuinely moves the lifespan up or down.
Ridge Caps and Vented Ridge Assemblies on a Metal Roof
The ridge is the highest point on the roof and the place warm air leaves the attic. It has to shed water, exhaust air, resist blowing snow, and let the panels move.
Thermal Bridging at Fasteners and Framing in a Metal Roof Assembly
Insulation only works where it is continuous. Rafters, clips and screws are conductive paths straight through it — and in winter those cold points are where condensation shows up first.
Water Stains on a Ceiling: Roof Leak or Condensation?
These two problems look identical on a ceiling and need completely opposite repairs. The differentiators are real — timing, location, pattern and what the attic looks like on a cold morning.
How Eavestrough Integrates With a Metal Roof Edge and Drip Edge
The eave is where a metal roof hands the water over. Get the drip edge, panel overhang and trough position right and the system works. Get them wrong and water runs behind the trough into the fascia.
Shoreline Properties: Corrosion Near the Great Lakes
Lake Erie and Lake Ontario are fresh water, so the marine salt story does not apply. What does apply on a waterfront property is time of wetness, wind-driven grit and local chloride sources.
UL 2218 Impact Resistance: How Class 1 to Class 4 Is Tested
The impact classes quoted for roofing come from a specific test: steel balls of increasing diameter dropped from increasing heights. Here is exactly what the test does and what it does not measure.
Roof Access, Fall Protection and Anchor Points on Commercial Metal Roofs
Anyone who goes on your roof needs a safe way up and a safe way to work. What building owners should understand about access, the hierarchy of controls, and why anchors cannot be fastened to panels.
Board-and-Batten Metal Profiles: How the Look Is Built
Board-and-batten metal borrows its rhythm from timber cladding, using a wide pan and a distinct raised cap. The details behind that look decide whether it belongs on a roof or only on a wall.
How a Metal Roofing Panel Is Built Up, Layer by Layer
A painted steel panel is six or seven engineered layers, most of them thinner than a human hair. Here is what each one does and which ones actually determine how the roof ages.
Signs Your Existing Roof Needs Replacing
Roofs rarely fail all at once. They give you several years of signals first. Here's what to look for on shingles and on older metal, and how to tell repair from replacement.
Drip Edge and Eave Detailing on a Metal Roof
The eave is where wind uplift starts, where ice dams form, and where every drop of water on the roof eventually goes. The detail there does more work than any other.
Unvented (Hot Roof) Assemblies Under Metal Roofing: When They Work
An unvented roof brings the deck inside the thermal envelope. It is a legitimate assembly with real advantages — and it has no tolerance for gaps, guesswork, or a leaky ceiling.
Attic Mould and Frost: A Ventilation Problem, Not Always a Roof Problem
Black staining on attic sheathing and frost on nail tips are moisture problems, and the moisture is usually coming from inside the house. Adding vents is rarely the first fix.
Slope and Expansion Joints in a Long Eavestrough Run
Eavestrough has to fall toward the outlets without looking crooked, and long runs of metal grow and shrink through an Ontario year. Both are design decisions, and both get skipped.
Road Salt: Why the Bottom Metre of Everything Goes First
Winter brine does not attack a fence evenly. It concentrates in a narrow band near the ground, and chlorides keep that band wet long after everything else has dried.