Winter is one of the most challenging seasons for flat roofs in Ontario. Heavy snowfall, freezing temperatures, and repeated thaw cycles create an environment where even small roofing weaknesses can become costly failures.
And while many building owners know about ice dams, that’s only one of several threats.
At Garcia Roofing, we want our clients to understand the full winter risk picture — in clear, practical language — so they can make informed decisions and protect their buildings year-round.
1. Ice Damming
Ice dams form when heat escapes the building, melts snow, and refreezes near roof edges or drains. Over time, the ice blocks drainage and forces water into seams, membranes, and insulation.
Why it’s a risk:
Ice dams block the roof’s built-in drainage, leaving water with nowhere to go and over time, it can backup enough where eventually it finds a way inside the building.
2. Heavy Snow Load & Structural Stress
Snow is heavier than it looks. Don’t believe us? We’ve gone ahead and provided the facts thanks to InchCalculator.com.
We don’t expect you to constantly calculate the weight of the snow on your roof, but you should be aware that too much weight on your roof can overload structural supports, cause roof sagging and create dangerous situations if not addressed.
3. Freeze–Thaw Expansion
Water expands when it freezes, which is important to remember during winter in Ontario, because temperatures don’t always stay below freezing. When temperatures become mild mid-winter, the snow and ice on your roof will begin to thaw. If it seeps into tiny cracks or seams, and mild temperatures turn colder again, that water expands, making those cracks larger and separating weak seams.
Why it’s a risk:
Simply put, due to this freeze-thaw cycle, a tiny opening in November can be a major leak by March if it’s not addressed before winter.
4. Blocked or Frozen Drains
Flat roofs rely entirely on drainage systems. Similar to how Ice Dams can cause problems on your roof, frozen or clogged drains create ponding and ice buildup, which often become the root cause of winter leaks.
Why it’s a risk:
Blocked or frozen drains cause water to back up and pool leading to leaks indoors, which may be minor at first and go unnoticed, but can lead to worsening leaks, or mold.
5. Wind-Driven Snow & Ice Buildup
Strong winds can push snow into parapet corners, around HVAC units, or near skylights, creating uneven buildup and localized stresses in vulnerable areas that would otherwise not be susceptible to ice damming or backup from a blocked drain.
Why it’s a risk:
Snow doesn’t fall evenly, and stress points form where you least expect them. Equipment and other such structures on a flat roof can trap blowing snow, leading to higher levels at these areas.
6. Condensation & Interior Moisture
If insulation or vapor barriers are compromised in the winter, when warm indoor air meets cold exterior surfaces, it can lead to interior issues such as:
Condensation
Mold
Wet insulation
Ceiling damage
Why it’s a risk:
Something people sometimes forget is that leaks aren’t the only moisture problem — sometimes it’s condensation hiding inside due to poor or compromised insulation and vapor barriers.
7. HVAC-Related Heat Loss
Natural freeze-thaw cycles aren’t the only kind of freeze-thaw issues rooftops encounter. Rooftop HVAC units can leak heat, accelerating freeze-thaw cycles around their bases and poor flashing or ignored roof problems around HVAC systems is a top winter leak point.
Why it’s a risk:
These types of man-made freeze-thaw cycles your rooftop equipment can cause may also create ice damming, or worsen penetrations, cracks and weak seams, but at an accelerated pace.
8. Unsafe Snow & Ice Removal
At Garcia Roofing, we recommend consistent snow removal for any flat roof. However, DIY snow removal or untrained crews can create a different set of problems, including:
Punctured membranes
Torn seams
Damaged drains
Why it’s a risk:
Not only can one wrong shovel scrape cause thousands in damage, it can also void your roof warranty! Many manufacturer and installation warranties are hinged on proper maintenance, and not all maintenance is proper maintenance.
How Garcia Roofing Helps Prevent Winter Roof Damage
We support Ontario’s building owners, contractors, and property managers with:
Certified winter inspections
Proper preventative maintenance
Safe snow & ice removal
Drainage and insulation assessment
Emergency leak response
And because we are trained and certified by leading manufacturers, our work is backed by warranty protection and best-practice installation standards. At Garcia Roofing, we’re not just here for today, we’re here for tomorrow as well.
As temperatures drop and snow begins to fall, flat roofs in Ontario face some of their toughest challenges of the year. Without proper preparation, even the strongest roof systems can suffer leaks, ice damage, and stress from snow loads.
At Garcia Roofing, we help building owners, contractors, and property managers protect their investments with proactive winter maintenance — keeping roofs safe, watertight, and ready for whatever the season brings.
Inspect Before the First Snowfall
Before winter sets in, it’s crucial to have your roof professionally inspected. Look for:
Cracks or blisters in the membrane
Damaged flashing around vents and edges
Debris buildup near drains or scuppers
Early signs of ponding or poor drainage
Catching small problems now can prevent major repair costs later.
Clear Debris and Check Drainage
Leaves, sticks, and dirt block drainage systems and create standing water — a serious risk once it freezes. Clear everything from the roof surface and test all drains and scuppers to ensure they’re flowing properly.
Even a small clog can lead to ice dams, which can cause leaks and dangerous weight buildup.
Reinforce Vulnerable Areas
Winter is unforgiving to weak seams, old flashing, and thin coatings. A certified roofer can reinforce these vulnerable points using:
Cold-applied sealants for added flexibility
Protective coatings to improve waterproofing
Edge reinforcement systems to reduce ice damage
These preventive measures extend the life of your roof and help it handle the freeze-thaw cycles Ontario is known for.
Monitor Snow Loads Throughout Winter
Snow can accumulate quickly and unevenly, especially during storms with wind drift. When left unchecked, it can strain your roof’s structure or cause partial collapse.
Garcia Roofing recommends:
Monitoring snow depth weekly during heavy snowfall
Scheduling professional snow removal for roofs with over 8–12 inches of buildup
Never using metal shovels or ice picks that can damage membranes
Check Interior Spaces for Warning Signs
Winter roof issues aren’t always visible from outside. Watch for:
Ceiling stains or bubbling paint
Unusual odors or moisture
Condensation forming near HVAC vents
These can indicate hidden leaks or insulation failures that should be addressed immediately.
Partner with a Certified Roofing Contractor
Winter roofing isn’t just about repairs — it’s about prevention. Garcia Roofing’s certified professionals are trained to identify risks, reinforce vulnerable areas, and respond quickly to emergencies.
We collaborate closely with builders, contractors, and property managers to ensure each roof system remains durable, efficient, and safe — even through Ontario’s toughest winters.
We’re not just here for today, we’re here for tomorrow as well.
Don’t Let Your Roof Give You a Scare This Halloween!
As jack-o-lanterns glow and leaves fall, Ontario’s weather brings more than just spooky vibes — it brings rain, wind, and moisture that can haunt your roof if left unchecked.
At Garcia Roofing, we’ve seen it all: hidden leaks, structural sagging, and costly surprises that seem to appear overnight. The good news? With the right care, you can keep your roof from becoming a real-life horror story.
The “Haunted” Warning Signs of Roof Trouble
You might not hear ghosts in your attic, but if you notice any of these signs, it could mean your roof is crying out for help:
Creeping water stains on ceilings or walls
Eerie drafts near rooflines or vents
Mysterious puddles forming on your flat roof after rain
Crumbling caulking or torn flashing around vents
If any of these sound familiar, don’t wait for the next storm — it’s time to call in the experts.
Common Roofing “Nightmares” — and How to Avoid Them
1. Sudden Appearing Leaks
Flat roof leaks often start small, hiding behind insulation or under layers of roofing material. By the time they’re visible, the damage is already done. Regular inspections are the best defense.
2. Drainage Clogs & Backups
Clogged drains and scuppers are like blocked arteries for your roof — leading to ponding water, ice formation, and premature wear. Keep them clean and flowing all fall long.
3. Holes & Punctures
Sharp debris or careless maintenance can pierce roofing membranes without immediate signs. Certified roofing professionals have the tools and training to find and seal these invisible threats before they grow.
4. Neglected Maintenance
Skipping routine maintenance may save time now — but it can summon much bigger costs later. Garcia Roofing offers preventative maintenance programs that keep roofs healthy and haunt-free.
Tricks (and Treats) for a Longer-Lasting Roof
Tricks to remember:
Schedule inspections twice a year (spring & fall).
Keep debris away from drains and roof edges.
Check flashing after every major storm.
Seal minor cracks before they grow.
And the ultimate treat? Peace of mind knowing your roof will stand strong through Ontario’s unpredictable seasons.
When to Call the Experts
Not every roofing issue is visible from the ground — and climbing up for a quick look isn’t worth the risk. That’s where we come in. While fall and spring are the most critical times to inspect your roof due to changing weather and heavy rainfall, they’re also the busiest seasons for roofing professionals. That’s why Garcia Roofing recommends scheduling routine roof checks year-round — ensuring small issues are caught early, no matter the season.
At Garcia Roofing, our certified crews are trained in all major roofing systems and safety standards. We provide thorough inspections, detailed reports, and clear repair recommendations — no tricks, just trustworthy service (treats!).
We’re not just here for today, we’re here for tomorrow as well.
As September turns into October, Ontario building owners face one of the most important times of year for roof maintenance. Fall is a critical transition season: the last chance to prepare your roof for snow, ice, and freeze-thaw cycles.
At Garcia Roofing, we’ve seen how a few hours of preventative care in the fall can save thousands in emergency repairs over the winter. Here’s our certified fall roofing checklist.
1. Clear Leaves and Debris from Roof and Drains
Leaves, branches, and dirt collect quickly in the fall. If drains, scuppers, or gutters clog, water will pool, freeze, and damage membranes. Clear everything now before the first freeze.
2. Inspect Seams, Flashing, and Membranes
Fall’s freeze-thaw cycles put stress on roof seams. Check for:
Lifting flashing
Cracked sealant
Separated seams
Bubbles or blisters in the membrane
If you spot issues, call a professional before snow sets in.
3. Verify Insulation and Vapor Barriers
Heat loss from poor insulation can cause ice dams and condensation. Inspect insulation for wet spots or compression and ensure vapor barriers are intact.
We often find that small insulation upgrades in fall lead to lower heating costs and fewer winter leaks.
4. Test Drainage Systems
Pour water into roof drains to confirm proper flow. Look for signs of slow drainage or leaks around drain connections. Blocked drainage is one of the top causes of flat roof failures in winter.
5. Review Roof Access and Safety
Fall is the best time to make sure:
Roof ladders, hatches, and walkways are safe
Snow guards and rails are secure
Contractors and maintenance staff know safe access protocols
Safety reduces liability and ensures winter snow removal can be performed quickly and safely.
Bonus Tip: Schedule a Professional Fall Inspection
A fall inspection by certified professionals ensures nothing is missed. At Garcia Roofing, our fall service includes:
Comprehensive membrane and flashing check
Drain and scupper clearing
Sealant touch-ups
Snow load readiness review
A written condition report
We’re not just here for today, we’re here for tomorrow as well.
Flat roofs offer great value for commercial, industrial, and multi-unit residential buildings across Ontario. But without proper preventative maintenance, even the best flat roof system can develop major problems—leaks, ponding water, insulation failure, and more.
At Garcia Roofing, we believe quality doesn’t end after installation. With over a decade of experience in Ontario’s roofing industry, we know that proactive care saves our clients thousands over the life of a roof.
Let’s explore how regular maintenance can help avoid common problems—and why working with a professional roofing partner like Garcia Roofing is a smart long-term strategy.
Common Flat Roof Problems You Can Avoid
1. Leaks and Moisture Infiltration
Cause: Punctures, seam separation, failing membranes, or ponding water.
Preventable With: Semi-annual inspections and early patching.
2. Ponding Water
Cause: Poor drainage design or blocked scuppers.
Preventable With: Drain cleaning, slope correction, and timely snow/ice removal.
3. Flashing Failure
Cause: Expansion and contraction from seasonal temperature swings.
Preventable With: Re-sealing flashing joints before winter.
4. Membrane Blistering or Cracking
Cause: Trapped moisture or UV degradation.
Preventable With: Protective coatings and vapor barrier maintenance.
5. Vegetation Growth and Debris Buildup
Cause: Neglected cleaning or poor roof access protocols.
Preventable With: Monthly cleaning, especially in spring and fall.
Why Preventative Maintenance Matters—Especially in Ontario
Ontario’s climate puts flat roofs through a lot. Heavy snow, spring melt, freeze-thaw cycles, and hot summers cause rapid wear—especially around seams, drainage systems, and rooftop penetrations.
Without regular checkups, even minor issues can lead to:
Interior water damage
Insulation saturation and energy loss
Membrane failure
Mold and mildew growth
Preventative maintenance doesn’t just extend the life of your roof—it also protects your tenants, your energy bills, and your reputation as a responsible property owner.
How Garcia Roofing Supports Long-Term Roof Health
At Garcia Roofing, we offer structured maintenance plans that are designed around:
Your specific roof type (ModBit, TPO, EPDM, BUR, etc.)
Ontario’s seasonal maintenance windows
Manufacturer warranty requirements
Proactive scheduling, so you never miss a critical inspection
Our services include:
Debris and vegetation clearing
Visual and tactile membrane inspection
Drain and scupper flushing
Flashing and caulking inspection
Snow load assessments in winter
Annual condition reports for your records
We also advise on upgrades like coatings or drainage enhancements if wear is starting to show.
What You Can Do Between Professional Inspections
While it’s important to leave most repairs to professionals, building owners and managers can still keep an eye on their roof between visits.
Flat Roof Owner Tips:
Inspect from a ladder (never walk the roof unsafely)
Look for pooled water 48+ hours after rain
Clear leaves and debris from roof and drain outlets
Watch for indoor signs: ceiling stains, musty smells, high humidity
If you own or manage a building with a flat roof, you know it’s an investment—one that should protect your property for decades when properly maintained. But one nagging question everyone in this position has likely had at some point is, how long does a flat roof really last in Ontario’s climate?
The answer: it depends on material type, installation, drainage, maintenance, and local conditions. Let’s break it down so you can understand what you have, what you may be looking at, and avoid costly surprises.
Typical Flat Roof Lifespans by Material
The lifespan of your flat roof largely depends on how well it was planned, installed, and maintained.
Why Planning Matters:
It’s important to keep in mind that partly due to lifespan, different materials are recommended for different applications. Since most options have a similar lifespan on their own, we have to consider the application we’re working with. For example, we won’t use EPDM above a restaurant because the grease will eat at the membrane.
Why Installation Matters:
This one should be pretty self-explanatory, but it’s worth repeating. An experienced, well trained and trusted flat roofing company is going to provide an installation that meets manufacturer expectations, and maximizes the life of their products.
Why Maintenance Matters:
Just like your vehicle, preventative and scheduled maintenance can greatly increase the lifespan of your flat roof when done properly by experienced flat roofer mechanics. If maintenance is not kept up with, the expected lifespan of your flat roof could be much lower than you think.
Common Flat Roof Materials & Lifespans
EPDM Rubber Roof: Up to 20 years
TPO Roof: Up to 20–30 years
PVC Roof: Up to 20–30 years
Modified Bitumen (ModBit): Up to 20–30 years
Built-Up Roof (BUR): Up to 20–30 years
These ranges assume appropriate material selection for each project,proper installation and regular maintenance. Ontario’s snow, ice, and freeze-thaw cycles can shorten lifespan if drainage or insulation are neglected, and certain materials are used for certain projects for safety, durability and reliability reasons. Trust a company like Garcia Roofing to select, install and maintain the right roof for you.
How to Identify What Kind of Flat Roof You Have
The first step in determining how long your flat roof should last is a solid understanding of what kind of flat roof you have. Many building owners aren’t sure which flat roof type they own—especially in older buildings, so if you’re not sure, you are not alone.
Here’s how you can start:
Check building documents: Your maintenance logs or building specs may list the system.
Visual clues:
EPDM is usually black rubbery sheets.
TPO/PVC are white or light-colored and heat-welded at seams.
ModBit or similar roofing typically has a granular surface, sometimes with seams sealed by torch or adhesive.
BUR looks like layers of tar and gravel.
When in doubt, call a pro—especially before climbing onto a roof.
Factors That Can Impact Roof Lifespan
1. Material Quality
High-grade materials like thicker membranes or premium adhesives resist UV rays and temperature swings better.
2. Proper Installation
Poor workmanship causes premature leaks, ponding, or membrane separation. That’s why certified contractors like Garcia Roofing matter.
3. Drainage Design
Standing water degrades roofing faster. Proper slopes, drains, and scuppers are essential—especially with heavy Ontario snow melt.
4. Insulation & Vapor Barriers
Good insulation protects your membrane from stress caused by extreme temperature swings.
5. Routine Maintenance
Annual inspections, debris clearing, and minor repairs go a long way in preventing major issues.
How to Check Your Flat Roof for Signs of Trouble
DIY Inspection Tips
If it’s safe and accessible, here’s what to look for:
Ponding Water: After rain, check for standing water that lasts more than 48 hours.
Visible Blisters or Cracks: Look for bubbles under the membrane or splits along seams.
Damaged Flashing: Check metal edges and seams for rust or separation.
Interior Stains: Brown spots on ceilings or walls can mean hidden leaks.
Moss or Vegetation: Indicates pooling water and trapped debris.
Why Hiring a Professional is the Smart Move
Flat roofs are tricky. Hidden leaks, poor drainage, and failing seams often go unnoticed until major damage appears.
A trusted local expert like Garcia Roofing:
Knows Ontario’s weather conditions
Understands the nuances of each flat roof system
Uses safe inspection methods
Spots early warning signs homeowners might miss
Provides detailed maintenance plans to extend roof life
How Garcia Roofing Extends Flat Roof Lifespan
With over a decade of experience, we don’t just install roofs—we build systems that stand the test of time. Here’s how we help clients maximize their roof’s lifespan:
Detailed inspections & condition reports
Preventive maintenance plans
Quality repairs using compatible materials
Upgrades for insulation and drainage
Transparent advice about when replacement is truly needed
Remember, at Garcia Roofing, we’re not just here for today—we’re here for tomorrow too.
