Recent data shows that 35.4% of houses for sale in Washington State are sold above their list price. This goes to show that people are still very much interested in buying properties in Washington State. However, building or buying a home in the Evergreen State comes with decisions essential to the long-term value and comfort of your home. One of these is your roofing choice.
Between the wet, temperate climate and the unique local aesthetics of the area, your roof must do more than look good—it has to perform. Your choice of material is critical to your roof’s performance.
Among the most common residential roofing materials are asphalt shingles and metal roofing. Which one is better for Washington’s rainy weather, moss-friendly environment, and forested neighborhoods? This guide will help you understand the pros and cons of each option.
Understanding the Pacific Northwest Climate
Among the most crucial factors to consider when choosing your roofing material is the PNW climate. Before diving into the materials, it’s important to consider what makes the Pacific Northwest climate unique:- High rainfall: Washington, especially the western half, sees frequent rain and long wet seasons.
- Moss and algae growth: Shaded roofs in wooded areas are prone to moss and algae growth, which can damage roofing materials over time.
- Temperature swings: While not extreme, Washington homes still deal with moisture expansion, ice dams, and thawing cycles that can wear roofing down.
- Environmental regulations: Stormwater runoff quality is a concern in the Puget Sound region. Certain roofing materials can leach harmful substances, contributing to pollution.
Asphalt Shingles: The Old but Gold
Asphalt shingles are, by far, the most commonly used roofing material in Washington homes, accounting for around 70% of residential roofs. They are favored for their affordability, versatility, and ease of installation.Advantages of Asphalt Shingles
Lower upfront cost: Asphalt shingles are more budget-friendly, with installation costs averaging between $7,000 and $30,000 or more, depending on the home’s size and the type of shingle used. Easy to install and repair: Roofing contractors are well-versed in working with shingles, making repairs quick and cost-effective. Variety in styles and colors: They blend well with the architectural aesthetics of many Washington neighborhoods.Disadvantages of Asphalt Shingles
Shorter lifespan: Asphalt shingles last about 15-30 years, while architectural shingles typically reach up to 30 years, which is still shorter than that of metal. Moss and algae growth: Asphalt surfaces, especially in shaded areas, are prone to organic buildup, requiring regular cleaning. Environmental impact: Many asphalt shingles are petroleum-based and not recyclable. They also contribute to runoff pollution when granules wash off. More frequent maintenance: Homeowners may need to clean, treat, or patch up roofs more often, especially in damp forested areas.Metal Roofing: A Durable Long-Term Investment
Metal roofing is becoming increasingly popular in the Pacific Northwest, particularly among homeowners seeking longevity, durability, and environmental performance.Advantages of Metal Roofing
Long-lasting: With proper installation and coatings, metal roofs last more than 50 years, often double or triple the life of shingles. Excellent for rain and snow: The smooth, non-porous surface quickly sheds water, reducing the chance of leaks and preventing moss buildup. Low maintenance: Unlike shingles, metal does not require regular cleaning or moss treatment. Eco-friendly: Most metal roofs are made from recycled materials and are fully recyclable. They also reflect sunlight, improving energy efficiency. Stormwater compliance: Studies show metal roofing leaches fewer harmful chemicals into stormwater, helping meet local environmental standards.Disadvantages of Metal Roofing
Higher upfront cost: Metal roofing typically costs $20,000–$50,000 or more, depending on type (standing seam, corrugated, etc.). Noisier without proper insulation: Without adequate underlayment, the sound of heavy rain or hail can be loud. Complex repairs: Damage to metal roofing often requires panel replacement, which is more difficult and expensive than repairing shingles. Initial aesthetic concerns: While modern metal roofing offers attractive finishes, some homeowners prefer the traditional look of shingles.Suitability for Washington State Homes
When it comes to roofing in Washington, metal roofing wins in long-term durability and performance, especially in areas with heavy tree cover, moisture, and limited sun exposure. It’s particularly ideal for forested suburbs, coastal regions, or high-rainfall zones like Federal Way or Kirkland. That said, asphalt shingles remain a solid choice for:- First-time homeowners
- Those on a tight budget
- Shorter-term stays (under 15–20 years)
- Neighborhoods with strict HOA guidelines or stylistic restrictions
