40-Year Guarantee on Engineered Red Grandis
At SJB Sash Windows, we pride ourselves on delivering the highest quality products with lasting durability. That’s why we offer an exceptional 40-year fully insurance backed guarantee on our engineered red Grandis. Engineered red Grandis is a premium, sustainably sourced timber known for its strength, stability, and resistance to the elements. With this extended guarantee, we provide peace of mind that your windows will perform at their best for decades to come. Our 40-year guarantee is a testament to the quality of our materials, the craftsmanship behind our products, and the reliability of our installation process.

Engineered Red Grandis is a top-tier, eco-friendly timber known for its exceptional durability, strength, and stability. Sourced from sustainably managed forests, Red Grandis is a high-performance material that is engineered to provide the best of both worlds: the natural beauty of hardwood with the superior strength of engineered wood.
This timber is ideal for windows, doors, and other joinery projects, as it is resistant to movement, cracking, and warping, ensuring long-lasting performance in a variety of weather conditions. Engineered Red Grandis maintains its structural integrity, making it an excellent choice for both modern and traditional applications.
With a consistent, smooth finish, Engineered Red Grandis provides a high-quality, low-maintenance alternative to other timber options, offering peace of mind and lasting beauty. It’s an environmentally conscious choice that aligns with industry-leading sustainability practices and high standards of craftsmanship.
Benefits of Engineered Red Grandis
Engineered Red Grandis is an increasingly popular timber choice for a variety of construction and design applications, known for its strength, stability, and sustainability. Below are some of the key benefits of using engineered Red Grandis:
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Sustainability
- Eco-friendly: Red Grandis is sourced from sustainably managed forests and is often certified by international sustainability standards such as FSC (Forest Stewardship Council). This ensures responsible sourcing, minimizing environmental impact.
- Renewable Resource: As a plantation-grown hardwood, Red Grandis is a renewable resource that helps reduce the need for deforestation of natural forests.
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Durability
- Resistant to Decay: Engineered Red Grandis is treated to resist moisture, fungi, and insect infestation. This results in a durable material that is ideal for both internal and external use, reducing the need for frequent maintenance or replacement.
- Longer Lifespan: Due to its enhanced treatment, engineered Red Grandis products typically have a longer lifespan than untreated wood, providing a long-term investment.
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Stability
- Reduced Shrinking and Warping: Engineered Red Grandis is crafted with an advanced manufacturing process that reduces the natural tendency of wood to shrink, swell, or warp with changes in temperature or humidity. This is especially important for structural elements like windows, doors, and flooring.
- Dimensional Stability: The engineered structure enhances the timber’s consistency, ensuring that it holds its shape over time, even under fluctuating environmental conditions.
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Aesthetic Appeal
- Beautiful Grain and Color: Red Grandis has an attractive light reddish-brown hue with a fine, straight grain. This gives it a refined and modern appearance that suits both traditional and contemporary designs.
- Versatile Finishes: The wood is easily stainable and can be finished in various ways to enhance its natural beauty, allowing for customization based on the project’s aesthetic requirements.
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Strength and Load-Bearing Capacity
- High Strength-to-Weight Ratio: Engineered Red Grandis is designed to be strong yet lightweight, making it suitable for structural applications such as beams, framing, and cladding.
- Reliable Performance: Its superior strength ensures that it can withstand heavy loads and external pressures, making it a reliable choice for high-performance applications.
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Cost-Effective
- Competitive Pricing: While Red Grandis offers many of the benefits of more expensive hardwoods, it is generally more affordable, making it an excellent option for those seeking a high-quality material at a lower cost.
- Reduced Maintenance Costs: The durability and weather resistance of engineered Red Grandis reduce the need for frequent maintenance, offering long-term cost savings.
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Versatility
- Wide Range of Applications: Engineered Red Grandis is suitable for both interior and exterior applications, including windows, doors, cladding, decking, flooring, and structural components. Its versatility makes it a popular choice for a wide range of residential and commercial projects.
- Customizable: The material can be easily customized in terms of size, finish, and treatment, allowing for tailored solutions for specific project requirements.
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Environmentally Friendly
- Low Environmental Impact: The plantation-grown nature of Red Grandis ensures that its production has minimal environmental impact compared to traditional hardwoods. Additionally, the engineered construction of Red Grandis products can help reduce waste and improve resource efficiency.
- Carbon Sequestration: Like all timber, Red Grandis contributes to carbon sequestration, helping to reduce carbon emissions in the atmosphere.
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Enhanced Performance in Exterior Conditions
- Weather Resistance: Engineered Red Grandis is treated to withstand outdoor conditions such as rain, humidity, and extreme temperatures, making it ideal for exterior applications like cladding and decking.
- UV Stability: The treatment process helps protect the timber from UV degradation, ensuring it retains its appearance for longer, even when exposed to direct sunlight.
Projects we have completed
We’ve mastered our craft over many years of manufacturing & installing a wide range of
Sash, Casement, and Doors into a wide variety of homes.