Thermowood offers enhanced durability and dimensional stability through heat treatment, making it resistant to decay and insect damage compared to natural Cedar. Cedar provides natural resistance to moisture and insects with a classic appearance but requires more maintenance to prevent weathering over time.
Table of Comparison
Feature | Thermowood | Cedar |
---|---|---|
Material Type | Thermally modified softwood | Natural softwood |
Durability | High resistance to decay and insects | Moderate natural resistance |
Stability | Improved dimensional stability | Prone to warping and shrinking |
Maintenance | Low maintenance, does not require chemical treatments | Requires regular sealing and staining |
Environmental Impact | Eco-friendly with no chemical additives | Natural but can require chemical preservatives |
Appearance | Darkened wood tone with uniform texture | Rich natural grain and color variation |
Cost | Typically more affordable than cedar | Higher cost due to rarity and demand |
Lifespan | 20-30 years with proper care | 15-25 years depending on conditions |
Introduction to Thermowood and Cedar Siding
Thermowood siding is created through a controlled heat treatment process that improves wood durability, stability, and resistance to decay without chemicals. Cedar siding, made from Western Red Cedar, naturally offers excellent resistance to moisture, insects, and fungal decay due to its high concentration of natural oils and tannins. Both materials are popular choices for exterior cladding, with Thermowood valued for enhanced longevity and cedar preferred for its traditional aesthetic and natural resilience.
What is Thermowood? Properties and Benefits
Thermowood is heat-treated softwood, typically pine or spruce, that undergoes a controlled thermal modification process to enhance durability, dimensional stability, and resistance to decay. The heat treatment reduces moisture content, making Thermowood less prone to warping, shrinking, and swelling compared to untreated wood, which is vital for exterior siding. Its improved stability, combined with a natural, rich brown color and eco-friendly profile, makes Thermowood a sustainable and low-maintenance siding option that competes effectively with traditional cedar in both performance and aesthetics.
What is Cedar? Properties and Benefits
Cedar is a durable, naturally rot-resistant softwood known for its rich aroma and attractive grain, making it a popular choice for siding. Its natural oils provide resistance to decay, insects, and moisture, enhancing longevity and reducing maintenance. Cedar also offers excellent insulation properties and ages gracefully to a silvery gray, increasing the aesthetic appeal of exterior cladding.
Durability and Lifespan Comparison
Thermowood offers superior durability compared to Cedar due to its heat-treated process, which enhances resistance to moisture, decay, and insect damage, extending its lifespan to 20-25 years or more. Cedar naturally contains oils that resist rot and pests, providing a typical lifespan of 15-20 years when properly maintained. Both materials require regular upkeep, but Thermowood's modified structure generally results in longer-lasting siding with less frequent maintenance.
Weather Resistance: Thermowood vs Cedar
Thermowood offers superior weather resistance compared to cedar due to its heat-treatment process, which enhances durability and reduces moisture absorption. Cedar naturally contains oils that provide moderate resistance to decay and insects but may require more frequent maintenance in harsh climates. Both materials perform well in exterior siding applications, but Thermowood's enhanced stability and resistance to warping make it a preferred choice for long-term exposure to extreme weather conditions.
Aesthetic Appeal: Color, Texture, and Grain
Thermowood siding exhibits a rich, uniform bronze to deep brown color that intensifies over time, enhancing its modern, sleek appearance, while cedar offers a warm, natural palette ranging from light amber to deep reddish-brown with more pronounced color variation. Thermowood's fine, smooth texture and subtle grain patterns provide a contemporary, minimalist aesthetic, contrasting with cedar's distinctive, prominent grain and knots that create a rustic, textured charm. Both materials age gracefully; Thermowood darkens evenly, maintaining a consistent look, whereas cedar develops a silvery patina that accentuates its natural wood character.
Environmental Impact and Sustainability
Thermowood siding, created through a heat treatment process that enhances durability without chemicals, offers a more sustainable option by extending wood lifespan and reducing the need for frequent replacement. Cedar siding naturally resists rot and pests but often requires chemical preservatives for long-term performance, which can impact environmental health. Choosing Thermowood or untreated cedar reduces carbon footprint by utilizing renewable wood sources and minimizing harmful emissions during production.
Maintenance Requirements for Both Options
Thermowood siding offers superior durability with low maintenance, requiring only occasional cleaning and resealing every 5 to 7 years to maintain its weather-resistant properties. Cedar siding demands more frequent upkeep, including annual inspection for cracks and mildew, and refinishing every 3 to 5 years to prevent rot and insect damage. Both materials benefit from protective coatings, but Thermowood's enhanced thermal modification process significantly reduces the need for frequent maintenance compared to natural cedar.
Cost Comparison: Initial Investment and Long-Term Value
Thermowood siding typically involves a higher initial investment compared to cedar due to its specialized heat treatment process enhancing durability and resistance to decay. Over time, Thermowood's low maintenance requirements and superior weather resistance contribute to lower long-term costs, making it a cost-effective choice despite the upfront expense. Cedar, while less expensive initially, often incurs higher maintenance and shorter lifespan expenses, impacting overall value when considering total cost of ownership.
Which Is Best for Your Project? Making the Right Choice
Thermowood offers enhanced durability and stability through heat treatment, making it highly resistant to decay, insects, and warping, ideal for long-lasting siding projects. Cedar naturally possesses excellent weather resistance and a warm aesthetic with its natural oils and tight grain, providing a classic, low-maintenance option preferred for residential applications. Choosing between Thermowood and Cedar depends on your priority for longevity, maintenance, and visual appeal, with Thermowood excelling in performance and Cedar favored for natural beauty.

Infographic: Thermowood vs Cedar for Siding