How Spokane's Weather Affects Your Roof

28 March 2025

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Living in the Spokane area, we encounter weather patterns that can take a toll on your home—especially your roof. Winter snow fall, spring rains and hot dry summers, presents a variety of challenges for homeowners. Understanding how Spokane’s weather impacts your roof can help by taking proactive steps to protect your roof and extend its lifespan. Let’s break it down season by season.

Winter: Snow, Ice, and freezing temperatures in and around Spokane are no joke. Average snowfall ranges from 40 to 50 inches each year. The weight of snow that accumulates can put serious pressure on your home’s roof. Older homes or those with flat or low-pitched roofs are particularly vulnerable to structural stress. If the snow isn’t cleared or melts unevenly, it can lead to leaks or even collapse in extreme cases.
Visually if you see areas where the shingles are visible and little to no snow appears, but the surrounding areas are covered in snow that is possibly a sign of your insulation failing.
Then there’s the freeze-thaw cycle. Fluctuating temperatures around the freezing point causes snow to melt during the day and refreeze at night. This process can form ice dams—ridges of ice that trap water along the edges of your roof. When water can’t drain properly, it seeps under shingles, damaging the underlayment and leading to leaks inside your home. Proper insulation and ventilation are key to preventing this, but regular inspections after heavy snowfalls can catch issues early.

Spring: Rain and Wind
Spring in Spokane brings milder temperatures, but it’s also a rainy season. Persistent moisture can expose weaknesses in your roof, especially if shingles are cracked or missing from winter wear. Moisture, especially in shaded areas encourages moss growth which leads to moisture accumulation. Poor drainage, like clogged gutters, exacerbates the problem, allowing water to pool and infiltrate your roofing system. Over time, this can rot wooden components and encourage mold growth.  Wind is another factor. Spokane’s spring storms can whip up gusts strong enough to loosen shingles or tear them off entirely. Even minor damage can become a bigger issue if left unchecked, so it’s wise to check your roof after any significant wind event.

Summer: Heat and UV Exposure
Spokane summers are hot and dry, with temperatures often climbing into the 90s or higher. Prolonged exposure to intense sunlight and UV rays can degrade roofing materials over time. Asphalt shingles, common in many Spokane homes, may become brittle, crack, or lose their protective granules. This not only affects your roof’s appearance but also its ability to shield your home from the elements.
The dry conditions also increase the risk of wildfires, especially in outlying areas. Embers carried by the wind can land on your roof, making fire-resistant roofing materials—like metal or composite shingles—a smart investment for long-term protection.

Fall:   Falling Leaves and Temperature Swings As fall settles in, Spokane sees cooler temperatures and plenty of falling leaves. While picturesque, those leaves can clog gutters and downspouts, leading to water backup during autumn rains. This puts extra strain on your roof and can accelerate wear if not addressed.
Fall temperatures often fluctuate, warm days giving way to chilly nights. Rapid temperature changes cause roofing materials to expand and contract, which can loosen fasteners or crack shingles over time. A well-maintained roof can handle this, but one already weakened by other seasonal stresses might start showing signs of trouble.

Tips to Protect Your Roof Year-Round Spokane’s four distinct seasons mean your roof faces a variety of threats, but there are ways to keep it in top shape:

  • Regular Inspections: Check your roof at least twice a year—spring and fall—and after major weather events.
  • Clear Debris: Keep gutters and downspouts free of leaves, snow, and ice to ensure proper drainage.
  • Trim Trees: Overhanging branches can drop leaves or break off in storms, damaging your roof.
  • Invest in Maintenance: Fix small issues like missing shingles or cracked flashing before they turn into costly repairs.
  • - Consider Upgrades: If your roof is aging, look into durable materials suited for Spokane’s climate, like metal roofing or high-quality asphalt shingles.

Final Thoughts

Spokane’s weather is as beautiful as it is challenging. Your roof withstands the worst of these seasonal weather patterns, protecting your home from snow, rain, wind, and sun. By understanding how the local climate affects it and staying proactive with maintenance, you can ensure your roof stands strong for years to come. After all, in a place like Spokane, a reliable roof isn’t just a luxury—it’s a necessity in order to protect the most valuable asset you own.
Tim Nicholas 20/20 Exteriors LLC 509-688-4480

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Winter Is Coming: Why You Should Replace Your Roof Before the Snow Flies If you live in Spokane or anywhere in Eastern Washington, you know how quickly the seasons can change. One week can bring sunny afternoons and comfortable temperatures, and before you know it, freezing nights, snow, ice, and winter weather have arrived. For homeowners who already know their roof is nearing the end of its life—or who have been putting off needed roof repairs—fall is an important time to make a decision. If your roof needs to be replaced, getting it done before the snow flies can save you money, prevent winter damage, and give you peace of mind throughout the coldest months of the year. At 20/20 Exteriors , we live and work right here in the Spokane area. We understand the conditions Eastern Washington roofs face, and we know that winter can expose weaknesses in a roofing system that may not have been obvious during the summer. Here are some of the biggest reasons to consider replacing an aging or damaged roof before winter arrives. 1. Snow Adds a Tremendous Amount of Weight to Your Roof Snow may look light and fluffy when it first falls, but accumulated snow—especially wet, heavy snow—can place a significant load on a roofing system. A healthy roof is designed to handle normal winter conditions. But an older roof may already have deteriorated shingles, weakened decking, previous water damage, or other problems. Add snow and ice to those existing issues, and small problems can become much bigger ones. If you’ve noticed curling or missing shingles, soft areas, leaks, damaged flashing, excessive granule loss, or other signs of deterioration, it’s worth having your roof inspected before it spends another Spokane winter under snow and ice. 2. Small Roof Leaks Can Become Big Winter Problems A small roof leak during the summer might seem manageable. During winter, that same leak can become much more serious. Water can enter around damaged shingles, flashing, vents, chimneys, valleys, or other vulnerable areas. When temperatures fall below freezing, that moisture can freeze and expand. Over repeated freeze-and-thaw cycles, small openings can become larger. Water that makes its way into your attic or home can also damage insulation, drywall, ceilings, wood framing, and personal belongings. Persistent moisture can contribute to mold and rot as well. Replacing a failing roof before winter helps create a strong, weather-resistant barrier before months of snow, ice, and freezing temperatures arrive. 3. Ice Dams Can Expose Weaknesses in an Aging Roof Ice dams are another concern for homeowners in cold climates. They can form when heat escaping through the roof melts snow. The water travels toward colder areas near the edge of the roof and refreezes. As this process continues, ice can build up and interfere with proper drainage. Water can then back up behind the ice and potentially work its way beneath roofing materials. Proper attic ventilation, insulation, and a correctly installed roofing system all play important roles in managing winter moisture. If your roof is already compromised, winter conditions can make the problem worse. A new roof won’t eliminate every possible winter issue by itself, but having a properly installed roofing system going into winter gives your home a much better line of defense. 4. Fall Gives You an Opportunity to Address Problems Before They Become Emergencies There is a major difference between planning a roof replacement and dealing with an emergency roof problem in the middle of winter. When you plan ahead, you have time to evaluate your roof, understand your options, select materials, and schedule the work appropriately. When a roof begins leaking during a snowstorm, your options can become much more limited. Emergency winter repairs may involve snow removal, temporary protection, difficult working conditions, and waiting for weather that allows permanent repairs to be completed safely. The better approach is to identify potential problems now. If you’ve already been told that your roof has only a year or two of useful life remaining, ask yourself whether you really want that roof protecting your home through another Eastern Washington winter. Sometimes getting ahead of the problem is the best investment you can make. 5. Your Roof Protects Much More Than the House Itself It’s easy to think of a roof as simply shingles and plywood. In reality, your roofing system protects almost everything you own. Think about what sits underneath your roof: your family, furniture, electronics, flooring, cabinets, appliances, photographs, keepsakes, and everything else you’ve accumulated over the years. The cost of water damage can extend far beyond repairing a few shingles. A dependable roofing system helps protect the entire structure of your home. That’s why we encourage homeowners not to evaluate a roof based solely on whether it is currently leaking. A roof can be deteriorating well before water appears on a ceiling. By the time you see a visible leak inside your home, water may already have traveled through multiple layers of the structure. 6. A New Roof Can Improve Your Home’s Energy Performance Your roofing system works together with attic insulation and ventilation to help protect your home from Spokane’s temperature extremes. During winter, proper ventilation and insulation help control heat and moisture in the attic. During summer, those same systems help manage excessive heat. When we evaluate a roofing project, we aren’t simply looking at the shingles you can see from the street. A professional roofing contractor should consider the overall system, including decking conditions, flashing, ventilation, underlayment, penetrations, and other critical components. The goal isn’t simply to make the house look better. The goal is to install a complete roofing system designed to protect your home for years to come. 7. Fall Weather Can Provide an Excellent Window for Roof Replacement Many homeowners assume roof replacement is primarily a summer project. That’s not necessarily true. Depending on weather conditions and the roofing materials being installed, fall can be an excellent time to replace a roof. The important thing is not to wait until severe winter weather arrives. As we move deeper into fall, workable weather windows become less predictable. Temperatures fall, daylight gets shorter, and snow can arrive with little warning. If you’re already considering a roof replacement, September and early fall are an ideal time to start the conversation rather than waiting until the first major snowfall is in the forecast. 8. Don’t Wait for a Leak to Tell You Your Roof Is Failing One of the most common misconceptions we hear is: “My roof doesn’t leak, so it must still be fine.” Unfortunately, that’s not always the case. Roofing materials deteriorate gradually. Shingles lose granules. Sealants age. Flashing can loosen. Wind can damage shingles. Fasteners can become exposed. Ventilation problems can contribute to moisture issues. None of these problems necessarily produces an immediate leak inside the house. A professional roof inspection can identify warning signs before they become expensive problems. If your roof is approaching the end of its expected service life, an inspection before winter is especially important. You may find that your roof still has several good years remaining. If so, that’s great news. But if there are significant problems, it’s much better to discover them on a clear September afternoon than during a January snowstorm. 9. Choose a Local Spokane Roofing Contractor When you’re investing in something as important as a new roof, who installs it matters. Eastern Washington has unique weather conditions. We experience hot summers, freezing winters, wind, snow, ice, and dramatic temperature swings. Your roofing contractor should understand those conditions. 20/20 Exteriors is a local Spokane roofing and siding company . We’re part of this community, and our reputation is built right here in the Inland Northwest. When you hire local, you’re working with a company that will still be here after the job is completed. That’s particularly important with roofing. A roof isn’t a short-term purchase. You want to know who installed it, who stands behind the workmanship, and who you can call if you have questions years down the road. Is Your Roof Ready for Another Spokane Winter? 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Even when the installation is completed properly, questions or problems can occasionally arise months or years later. You want to know that the company you hired will still be around when you need them. Some out-of-state or storm-chasing contractors operate in an area temporarily. They may arrive after a major storm, complete hundreds of projects, and eventually leave the region. If something goes wrong after they leave, getting someone back to your home can be difficult. A local contractor has a much stronger incentive to stand behind their work. Their reputation is built in the same community where they live and work. 2. Local Contractors Have a Reputation to Protect When you hire a local roofing company, you're not just hiring a crew. You're hiring a business that has to live with the reputation it creates in the community. Local contractors depend on referrals, repeat customers, online reviews, and relationships with homeowners and other local businesses. That creates accountability. A company that plans to serve Spokane for many years understands that every roof it installs represents its name. Good workmanship and good customer service aren't simply promises—they are essential to staying in business. 3. Local Roofers Understand Spokane's Weather Roofing isn't the same everywhere. A roofing system that works well in one part of the country may have different considerations in Eastern Washington. Spokane-area homes experience cold winters, snow, ice, wind, summer heat, and significant temperature swings throughout the year. A contractor who regularly works in the Spokane area understands the local conditions and the challenges they can create for roofing systems. Local experience also means familiarity with the types of homes, roofing materials, building practices, and common roofing problems found throughout the Inland Northwest. 4. You Know Who You're Actually Hiring Before signing a roofing contract, homeowners should know exactly who they are doing business with. Ask questions such as: Where is your company located? How long have you been serving this area? Are you properly licensed and insured? Can you provide local references? Do you have a permanent local business presence? Who will I contact if I have a problem after the project is finished? Is the work being performed by your employees or subcontractors? Who will be responsible for warranty issues? A reputable local contractor should be comfortable answering these questions. If a company is difficult to reach, has no meaningful local presence, or seems to have appeared in town overnight, homeowners should proceed carefully. 5. Local Contractors Have More to Lose This is one of the most important differences. A company that travels from market to market may be able to leave a community behind once the work is completed. A local roofing contractor doesn't have that luxury. Their office is here. Their employees live here. Their customers are here. Their reputation is here. If a local contractor does poor work, word spreads quickly. If they do excellent work, homeowners recommend them to their friends, neighbors, and family. That creates a powerful incentive to do the job correctly and take care of customers. 6. Local Matters When You Need Warranty or Follow-Up Service A roof can last for decades, so choosing a contractor shouldn't be based solely on who offers the lowest price today. Consider what happens five years from now. If you have a question about your roof, discover a problem, or need warranty assistance, will you be able to reach the contractor? A local roofing company has a physical presence in the community and can provide ongoing service long after the installation is complete. That peace of mind is worth considering when comparing bids. 7. Your Money Stays in the Local Community Hiring local also benefits the community itself. Local roofing companies employ local workers, purchase products and services from area businesses, pay local taxes, and contribute to the regional economy. When you hire a reputable Spokane-area contractor, more of the economic benefit of your roofing project stays right here in the Inland Northwest. 8. Don't Let a Storm Create Pressure to Make a Quick Decision After a major windstorm or hailstorm, homeowners may suddenly see roofing contractors offering inspections and repairs. Some may be legitimate local contractors. Others may be companies that travel from outside the area specifically to pursue storm-related work. Regardless of who comes to your door, don't let anyone pressure you into signing a contract before you've had time to do your homework. Get multiple estimates. Check reviews. Verify licensing and insurance. Ask where the company is based. 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