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 3 of 7
Striations, Pencil Ribs and Stiffening Beads: Why Flat Panels Get Texture
The grooves and ribs rolled into a metal panel are not decoration. They stiffen the pan and break up reflections so that unavoidable waviness stops being visible.
Zinc Roofing and the Self-Healing Patina: How It Actually Works
Architectural zinc is not pure zinc, and its patina genuinely does repair scratches. Here is the alloy chemistry, the mechanism behind self-healing, and the ventilation rule that decides whether it lasts.
Walking on a Metal Roof Safely (and Why You Probably Shouldn't)
Metal roofs can be walked on — but the surface is slippery, the safe footing depends on the panel profile, and the consequences of a wrong step are dents you can't undo or a fall you can't take back.
Fasteners for Metal Roofing: Screws, Clips and Where Each Is Used
Exposed screws, hidden clips, stitch screws and deck fasteners all do different jobs. Getting the wrong one — or driving the right one badly — is the most common cause of leaks.
Vapour Barriers and Air Barriers: They Are Not the Same Thing
One controls diffusion through materials, the other controls air flowing through holes. They are made of different things, tested differently, and fail differently — and the roof needs both.
Flashing Separation at Walls and Chimneys
Where a roof meets a wall or a chimney is where most roofs leak. Here is how to tell flashing failure from masonry absorption, and why re-caulking a wall flashing almost never holds.
Gutter Guards and Leaf Protection: An Honest Look at What They Do
Gutter guards reduce cleaning. They do not eliminate it, and some make ice worse. A straight comparison of mesh, screen, reverse-curve, foam and brush systems for Ontario conditions.
Getting a Roof Ready for Ontario's Spring Storm and Hail Season
Spring is when winter damage surfaces and convective weather arrives. A methodical walk-around in March and April finds the small problems while they are still small.
Reading a Paint Finish Warranty: Film, Chalk and Fade
Finish warranties are written in three categories that cover three different failures, on different terms. Knowing how the categories work tells you what a warranty document is actually promising.
Post-Frame (Pole Barn) Construction and Metal Roofing
In a post-frame building the steel roof is part of the structure, not just a cover. Understanding diaphragm action, uplift load path and purlin spacing changes how you plan a build or a re-roof.
Oil Canning in Metal Roofing: What Causes It and How Installers Minimize It
Oil canning is waviness in the flat part of a metal panel. It has several separate causes, most of them controllable, and it is worth understanding before you sign a contract.
Galvanic Corrosion: Which Metals Must Never Touch on a Roof
Galvanic corrosion needs three things at once — two different metals, electrical contact and an electrolyte. Here are the pairs that destroy roofs, and the fastener rules that follow.
Repairing Scratches and Scuffs on a Metal Roof
Not every scratch needs fixing, and the wrong touch-up looks worse than the scratch did. How to tell surface scuffs from real damage, and how to repair the ones that matter.
Butyl Tape, Sealants and Closures in a Metal Roof Assembly
Butyl seals compressed joints. Gunnable sealant seals gaps. Foam closures block air and snow. Confusing the three — or using hardware store silicone — is how details fail.
Above-Sheathing Ventilation: Battens and Counter-Battens Under Metal Roofing
A vented air space between the deck and the panel drains water, dries the deck, breaks the thermal path and reduces condensation. Here is how the detail is built and when it earns its place.
Sealant and Butyl Failure on a Metal Roof: Lifespan and Re-Sealing
Sealant is the shortest-lived material on a metal roof. Knowing which sealants are doing real work, which are only a backup, and how they fail tells you what actually needs attention.
Ice in Eavestroughs: Why It Forms and What Actually Helps
Every Ontario winter produces the same photos — a trough packed with ice and icicles down to the porch rail. The trough is not the cause. Here is the real mechanism and the fixes in order of effectiveness.
Summer Heat: Roof Surface Temperature and What Reaches the Attic
A roof in full sun runs far hotter than the air around it. What decides how much of that heat gets into the house is reflectance, emittance, thermal mass and what sits under the deck.
Touch-Up Paint on Metal Roofing: When It Helps, When It Hurts
Manufacturer touch-up paint matches the colour but not the chemistry. Used in the right places it protects bare metal. Used in the wrong places it creates a permanent, glossy mark.
Re-Roofing an Occupied Commercial Building With Minimal Disruption
The roof is only half the job when the business underneath keeps running. Sequencing, dry-in discipline, noise, fire watch, alarm coordination and how a metal retrofit changes the equation.
Exposed-Fastener vs Concealed-Fastener Metal Roofing: The Real Trade-Offs
One system screws through the panel face. The other hides every fastener inside the seam. The difference is not just appearance, it changes maintenance, thermal movement and where each belongs.
AZ50 vs AZ55: What the Galvalume Coating Number Actually Means
AZ50 and AZ55 are coating weights, not grades — and the difference between them is smaller than the difference between painted and unpainted product. Here is how the designation works.
Finding and Fixing a Leak on a Metal Roof
Metal roofs rarely leak through the panels. They leak at penetrations, flashings, fasteners and terminations. Here's how to trace a leak to its actual source and what to do about it.
Thermal Expansion and Contraction: How a Metal Roof Is Designed to Move
A long steel panel can change length by more than half an inch between a January night and a July afternoon. Every good metal roof detail exists to let that happen freely.