Refreshing a Facade with Thermally Modified Ash

Assessing Your Existing Facade: Foundations First

The first step in any facade refresh is a thorough assessment of the current exterior. This involves more than just looking at the surface; you need to evaluate the underlying structure. Check for any signs of moisture intrusion, rot, insect damage, or structural instability in the existing siding, sheathing, and framing. Addressing these issues before installing new material is crucial for the longevity and performance of your refreshed facade.

For example, if your current siding shows evidence of water damage, investigate the source. It could be failing flashing around windows or doors, issues with the roofline, or inadequate drainage at the base of the wall. Repairing these underlying problems will protect your new thermally modified ash cladding.

Consider the existing wall assembly. Is it a rainscreen system, or is the cladding directly applied to the sheathing? Understanding the current construction will inform how the new thermally modified ash will be integrated, especially regarding ventilation and moisture management.

Why Choose Thermally Modified Ash for a Facade?

Thermally modified ash offers a unique combination of aesthetic appeal and enhanced performance for exterior applications. The thermal modification process uses heat to alter the wood's cellular structure, improving its stability and making it less prone to expansion and contraction due to changes in humidity. This improved moisture response is a significant benefit for exterior cladding, helping to maintain a consistent appearance over time.

Visually, thermally modified ash provides a hardwood presence with a pronounced grain and a rich, natural deep brown hue. This allows for a sophisticated and enduring aesthetic that can complement various architectural styles. It's a material chosen for its denser feel and aesthetic qualities in high-visibility applications like cladding.

Thermally modified ash is versatile and can be used across various applications, including cladding and feature walls, making it a strong candidate for a comprehensive facade refresh. Its natural tone can be left to weather gracefully or treated to maintain its initial color.

Selecting Profiles for Your Facade Design

Thermally modified ash is available in several profiles suitable for cladding, allowing for diverse design possibilities. For a facade refresh, common profiles include S4S E4E End Match in nominal sizes such as 1 × 6 Plus and 5/4 × 6. These profiles are designed for siding applications and can create clean lines or more traditional appearances.

The choice of profile impacts the visual texture and shadow lines of your facade. A square-edge profile (S4S E4E) can create a more contemporary look with minimal gaps, while a tongue-and-groove or shiplap profile can offer better weather protection and a distinct shadow line. Consider how the profile will interact with light and shadow throughout the day and how it will contribute to the overall architectural style.

For trim and moulding details around windows, doors, or corners, thermally modified ash is also available in sizes like 1 × 10, 2 × 2, 2 × 4, and 2 × 6 (S4S E4E). Coordinating these trim pieces with your main cladding profile ensures a cohesive and finished look for the entire facade.

Planning Your Facade Layout: A Worked Example

Let's consider a hypothetical facade refresh for a section of a home. Assume a wall section is 12 feet wide and 8 feet high, with a single window opening that is 4 feet wide and 3 feet high, centered horizontally and 3 feet from the bottom. We plan to use Thermally Modified Ash S4S E4E End Match, nominal 1 × 6 Plus.

First, calculate the total wall area: 12 ft × 8 ft = 96 sq ft. Next, calculate the window area: 4 ft × 3 ft = 12 sq ft. The net area to be covered is 96 sq ft - 12 sq ft = 84 sq ft.

A nominal 1 × 6 Plus board typically offers a face width of approximately 5.5 inches (0.458 feet). To cover the 8-foot height vertically, you would need 8 ft / 0.458 ft per board = approximately 17.47 boards. Since you can't use partial boards for vertical runs, you would need 18 full boards if cutting from longer stock. For the 12-foot width, you would need 12 ft / 5.5 inches (or 0.458 ft) = approximately 26.2 boards horizontally. If installing horizontally, boards are typically purchased in lengths that minimize waste. For this example, let's assume vertical installation. You would need 18 boards to cover the height. For the 12-foot width, you would need 12 ft / (nominal board width) for the number of runs. If using a 1x6 (5.5 inch actual width), 12 ft * 12 in/ft / 5.5 in = 26.18 boards across. Since boards are typically sold in fixed lengths (e.g., 8', 10', 12', 14', 16'), you would need to plan cuts carefully.

For a vertical installation, if using 12-foot lengths for a 12-foot wide wall, and cutting around the 3-foot high window, you would need to purchase full lengths. If the boards are 5.5 inches wide, you'd need 27 boards (12 ft / 0.458 ft = 26.2, rounded up to 27). Each board would be cut to fit above and below the window, and two boards would need to be cut to frame the window opening. Always account for waste and cutting losses; ordering 10-15% extra material is a common practice.

Considering the Coastal or Winter Climate

When planning a facade refresh, especially in specific climates, thermally modified ash offers advantages due to its improved stability. In coastal regions, fluctuating humidity and salt air can be challenging for many wood products. The thermal modification process enhances the wood's resistance to moisture, which can be beneficial in humid environments, reducing the likelihood of warping or checking.

For winter climates, where temperature swings and freeze-thaw cycles are common, the stability of thermally modified ash helps it perform consistently. While no wood is impervious to extreme conditions, the reduced movement in thermally modified wood can contribute to a more durable facade over time. Proper installation, including a well-designed rainscreen system, is still essential to manage moisture effectively in all climates.

Regardless of climate, ensure that appropriate fasteners are selected, especially in coastal areas where corrosion resistance is critical. Always consult local building codes and best practices for exterior cladding in your specific region.

Complementary Materials and Aesthetic Integration

Thermally modified ash, with its deep brown hue and pronounced grain, pairs well with a variety of other facade materials. For a modern aesthetic, consider combining it with metal accents, such as dark-finished steel or aluminum, for trim, railings, or architectural features. This can create a striking contrast and highlight the natural beauty of the wood.

For a more traditional or rustic feel, thermally modified ash can be integrated with stone, stucco, or brick. The warmth of the wood can soften the appearance of masonry elements, creating a balanced and inviting exterior. The choice of complementary materials should align with the overall architectural style of your home and the desired visual impact.

When planning the integration, consider how different materials meet at corners, transitions, and around openings. Proper flashing and detailing are crucial to ensure weather resistance and a clean, finished appearance. For example, a crisp edge where ash cladding meets a stucco wall requires careful planning to prevent water intrusion and maintain aesthetic continuity.

Before you order

• Assess existing facade for structural integrity, moisture, and pest damage.
• Determine desired aesthetic and how thermally modified ash profiles will achieve it.
• Calculate net area for cladding, accounting for windows, doors, and other openings.
• Plan board layout (vertical/horizontal) to minimize waste and ensure visual appeal.
• Select appropriate fasteners suitable for thermally modified ash and local climate.
• Consider complementary facade materials (metal, stone, stucco) for integrated design.
• Confirm local building codes and installation best practices for exterior cladding.
• Budget for material overage (10-15%) to account for cuts and waste.
• Plan for proper ventilation and a rainscreen assembly if required.
• Decide on finishing (oiled, stained, or natural weathering) and long-term maintenance.

Confirm installation details, approved uses and warranty terms in the current instructions for the exact product and profile. Your installer should verify the substrate, structure and applicable project requirements.

Questions to help you decide

Keep planning your project