Our design calculations for non-traditional properties provide robust structural analysis to support repairs, strengthening, alterations and refurbishment of homes constructed using pre-1970 and system-built methods, including Airey, Wimpey No-Fines, Cornish, Tarran, BISF and other PRC and non-PRC housing types.
Non-traditional construction requires a detailed understanding of original design assumptions, materials and load paths. Our calculations ensure proposed works are safe, compliant and technically justified, supporting both regulatory approval and long-term asset performance.
Why Design Calculations Are Critical for Non-Traditional Housing
Many non-traditional properties were designed using historic standards and materials that behave differently from modern construction. Alterations, repairs or upgrades without appropriate structural calculations can introduce unintended risks.
Our design calculations help to:
- Confirm structural adequacy following deterioration or damage
- Support licensed repair and strengthening schemes
- Justify alterations, remodelling or change of use
- Demonstrate compliance with current building regulations
- Reduce risk during refurbishment or regeneration projects
Specialist calculations provide confidence that interventions are proportionate, effective and sustainable.
Our Approach to Design Calculations
We deliver design calculations using a structured, evidence-based process tailored to non-traditional construction:
Understanding the Existing Structure
Review of original drawings, construction details, previous surveys and investigation data to confirm the structural system and material properties.
Structural Analysis
Assessment of load paths, element capacity and global stability, taking account of deterioration, defects and non-standard detailing.
Design of Repairs and Strengthening
Calculation and justification of repair, replacement or strengthening measures, including compatibility with existing materials and construction systems.
Compliance and Assurance
Calculations prepared in accordance with current standards and guidance, providing clear technical justification for approval and implementation.
Applications of Our Design Calculations
Our structural design calculations support a wide range of interventions, including:
- PRC and NTHAS repair schemes
- Structural strengthening of frames, panels or foundations
- Removal or modification of load-bearing elements
- Fire remediation and building safety works
- Energy efficiency upgrades and retrofit projects
Calculations are tailored to the specific risks and constraints of non-traditional housing stock.
Clear, Decision-Ready Outputs
We provide clear, auditable deliverables, including:
- Structural design calculations
- Technical notes explaining assumptions and limitations
- Supporting sketches or drawings where required
- Documentation suitable for building control, regulators and funders
Outputs are written to be transparent, proportionate and easy to interpret, helping decision-makers understand both risks and solutions.
Why Work With Us?
We have extensive experience producing structural design calculations for non-traditional and PRC housing, combining technical rigour with practical understanding of social housing delivery. Our advice is independent, compliant and focused on delivering safe, cost-effective solutions.
We help landlords progress repair and refurbishment projects with confidence, ensuring non-traditional properties remain structurally sound, compliant and fit for the future.