Performance standards
Proven performance in every system we build.
At Donaldson Timber Systems, performance isn’t an add-on. It’s engineered into everything we do.
From airtightness and thermal efficiency to durability, safety and sustainability, every timber frame system we manufacture is tested, certified and proven to perform for the life of the building.
We combine precision offsite manufacturing, independent accreditation and over 50 years of timber frame innovation to deliver results you can trust for housebuilders, contractors and housing providers alike.
Built for quality and consistency
Our products are manufactured in controlled factory conditions using advanced automation and digital design.
This ensures every panel, joint and seal meets the same exacting standards delivering reliable performance across energy efficiency, strength, and compliance.
Each system is backed by third-party certification, including NHBC Accepts, BBA, BOPAS+, and STA Gold, giving you complete confidence in quality, durability and compliance.
Performance that supports sustainability
Our timber frame systems deliver high levels of thermal and airtight performance while locking carbon into the structure for the life of the building.
This fabric-first approach reduces energy demand, helps meet the Future Homes Standard, and contributes directly to the UK’s net zero ambitions.
Proven through precision
Whether you’re developing affordable housing, private homes or large-scale regeneration projects, we provide performance you can measure and rely on:
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Predictable energy and thermal results.
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Faster, safer build programmes.
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Long-term durability and lifecycle value.
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Verified compliance with building regulations.
Every system. Every project. Proven performance from design to delivery.
Confidence built on quality, assurance, and trust
At Donaldson Timber Systems, we believe that confidence in construction starts with proven quality.
When you choose our timber frame systems, you can be sure they’ve been independently tested, accredited, and certified for safety, durability, and performance, meeting and often exceeding the standards required for modern methods of construction (MMC), offsite manufacture, and Future Homes Standard compliance.
Knowing that the products you procure will perform exactly as expected is essential to delivering a successful, compliant project.
We believe that too. That’s why our products are backed by independent certification, demonstrating that it is fit for purpose, meets building regulations, and is engineered to the highest standards of modern timber construction.
Our accreditations and certifications
All Donaldson Timber Systems products are approved by NHBC Accepts and covered by the NHBC Buildmark warranty.
This independent assessment ensures our timber frame systems meet NHBC standards for safety, compliance, and long-term durability, giving housebuilders, developers, and homeowners complete confidence in quality and warranty assurance.
Our flagship Sigma® II closed-panel timber frame system is BOPAS accredited, the leading certification for Modern Methods of Construction (MMC).
BOPAS independently assesses the design, manufacture, and installation of MMC systems to ensure durability and integrity over a 60-year design life.
For developers, lenders, and housing associations, BOPAS accreditation provides confidence that our systems are built to last, a vital consideration for offsite construction.
The British Board of Agrément (BBA) is the UK’s leading independent certification body for construction products.
Our Sigma® II system holds BBA certification, verifying its technical performance, compliance with building regulations, and alignment with the latest fire and structural safety standards.
The Agrément Certificate is a recognised mark of excellence, proof that our products perform as designed, manufactured, and installed.
As a Structural Timber Association (STA) Gold Member, we meet the highest recognised level of quality assurance in the timber frame industry.
STA Assure certification confirms that our systems, processes, and people operate to verified standards of safety, quality, and regulatory compliance, giving confidence to insurers, lenders, and warranty providers.
Our commitment to excellence goes beyond product testing. we operate to internationally recognised ISO standards that govern every aspect of our work from quality to environment to safety.
Ensures robust control across design, manufacture, and delivery, guaranteeing consistency and reliability in every timber frame component.
Demonstrates our commitment to sustainability, waste reduction, and low-carbon construction, aligning with the UK’s net zero targets and the Future Homes Standard.
Embeds a culture of safety across our operations, protecting our people, partners, and customers at every stage of the build process.
We’re proud to hold the Order of Distinction from the Royal Society for the Prevention of Accidents (RoSPA), awarded for 16 consecutive years of outstanding health and safety performance.
This recognition places Donaldson Timber Systems among a small group of construction industry leaders shaping safer, healthier workplaces.
Why certification matters
Accreditation is about more than badges, it’s about trust, transparency, and technical assurance.
Independent certification proves that our closed-panel timber frame systems, open-panel timber frame systems, and offsite construction processes have been rigorously tested and verified for performance, safety, and consistency. For our customers, this means:
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Confidence that your build meets all relevant building regulations and technical standards.
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Proof of durability and performance, recognised by NHBC, BOPAS, and BBA.
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Reduced risk when securing warranties, funding, and insurance.
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Clear evidence of compliance for net zero and low-carbon construction frameworks.
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Peace of mind that you’re partnering with a timber frame manufacturer committed to integrity and continuous improvement.
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