Comprehensive Remedial & Defect Liability Solutions
Principal Contractor Aftercare is a specialist service from Structura UK that focuses on rectifying defects in roofs, façades, curtain walling, rainscreen cladding and glazing systems following practical completion. We act on behalf of building owners, facilities managers, and contractors to deliver lasting remedial, Defective Premises Act (DPA) and Defect Liability Period (DLP) repairs using tried-and-tested methods and industry expertise.
What Is Principal Contractor Aftercare?
In construction and façade engineering, aftercare begins when a project is completed and handed over. It covers the inspection, identification and remediation of defects that emerge during the Defect Liability Period (DLP) or under regulatory obligations like the Defective Premises Act (DPA).
Structura UK’s Principal Contractor Aftercare service provides:
- Rapid defect assessment and remedial planning
- Creation of technical drawings where none exist
- Façade and roof repair work, including curtain wall spandrel remediation
- Cladding, render, coping, metal pressing and associated system rectification
- Coordinated work in live, occupied environments
How It Works
To ensure transparency and quality from inspection to handover, we follow a structured aftercare workflow:
1. Initial Assessment & Site Survey
A qualified technician visits site to identify defects, assess risk, and determine compliance with DPA/DLP obligations. We document issues even when the original “as-built” information is not available, preparing reliable drawings where needed.
2. Detailed Reporting & Recommendations
Based on the survey, we provide a detailed defect report with photographic evidence, risk ratings and suggested remedial actions tailored to the specific façade system or roof assembly.
3. Remedial Planning & Programme Development
We collaborate with project stakeholders to build a practical and compliant remedial plan, including method statements, materials lists, safety provisions and programme phasing tailored to occupied buildings.
4. Access & Logistics Preparation
Our team coordinates access solutions (scaffolding, mast climbers, engineering or out-of-hours working) to ensure works proceed safely without disrupting building occupants or public interfaces.
5. Execution of Remedial Works
We carry out defect rectification, repair, replacement and upgrading of façade elements, curtain wall spandrels, rainscreen panels, render systems, metal work and other façade components.
6. Quality Assurance & Performance Testing
Before final sign-off, all repairs are tested and inspected to ensure performance standards are met. Where required, we can integrate CWCT water testing and leak investigation services for building envelope performance validation.
7. Final Handover & Aftercare Advice
Comprehensive documentation is provided, including updated drawings, inspection reports, maintenance recommendations and warranties where applicable.
Why Choose Structura UK Aftercare
Principal Contractor Aftercare is a demanding discipline that requires technical depth, meticulous planning and decades of experience in façade remediation. Structura UK stands out with these differentiators:
Retrofit & Remedial Specialists
Unlike generic façade contractors, we specialise in retrofitting and remedial works where existing documentation may be incomplete or outdated. We produce reliable technical drawings and remedial solutions even without as-built information.
Expert Defect Diagnosis
Our teams are trained to diagnose defects across a wide range of façade systems, curtain walling, rainscreen cladding, insulation systems, and roof assemblies, ensuring the root cause is solved, not just the symptom.
Safe Execution in Occupied Buildings
Many aftercare projects occur on live sites. We plan access, logistics and safety systems to minimise disruption and prioritise occupant safety at every phase.
Regulatory Compliance
We understand and adhere to the legal frameworks that govern aftercare, including the DPA and project-specific DLP provisions, giving clients peace of mind.
Broad Technical Capability
From curtain wall spandrel remediation to insulated render corrections or coping system alterations, we offer comprehensive solutions across façade and roofing systems.
Decades of Proven Projects
Our aftercare work spans theatres, hospitals, office buildings, heritage structures and landmark sites across the UK, demonstrating depth of capability.
Specifications & Standards
Principal Contractor Aftercare incorporates industry best practice, performance standards and legal requirements to ensure durability, safety, and compliance:
Technical Drawings & Documentation
Where original as-built drawings do not exist, we create precise CAD/BIM documentation that informs repair scopes and future maintenance.
Health, Safety & Risk Management
All site activities follow relevant UK construction health and safety standards to protect workers, clients, building occupants and the public.
DPA & DLP Compliance
All work is conducted in line with the Defective Premises Act and aligned with the project’s Defect Liability Period obligations.
CWCT Façade Standards
When testing and validation are required, we apply CWCT air and water testing criteria to validate repairs and reinstate building envelope performance.
Typical Project Timeline
Note: Actual timelines vary based on defect complexity, building size and access requirements. Complex façades, phased programmes and occupied buildings may require extended coordination periods.
Stage
Initial Survey & Reporting
Remedial Planning & Documentation
Access Setup & Risk Mitigation
Repair Execution
Performance Testing & Handover
Duration
1–2 weeks
2–4 weeks
1–3 weeks
4–12 weeks
1–2 weeks
As London-based façade contractors, Structura provides principal contractor services and structured aftercare support across Greater London and throughout the UK, ensuring projects are delivered safely, compliantly and with ongoing performance assurance.
Frequently Asked Questions
What is Principal Contractor Aftercare?
Principal Contractor Aftercare refers to inspection, defect identification and remedial works during the Defect Liability Period or under statutory obligations such as the Defective Premises Act.
How do you diagnose defects without as-built drawings?
We use careful site surveys, reverse engineering methods and historical system knowledge to produce accurate technical drawings where original information is missing.
Why is aftercare important?
Aftercare ensures building elements perform as designed, remain watertight, safe, durable and compliant after handover, protecting value and user safety.
Do you work on occupied buildings?
Yes, we have strong experience planning and executing remedial works in live environments, managing access, safety and occupant interface.
What standards guide your aftercare works?
Our approach follows DPA/DLP obligations and incorporates CWCT façade testing where needed for performance validation.
Can you integrate other façade services?
Absolutely. Aftercare often integrates with planned maintenance, CWCT testing, glazing remediation and broader façade repairs.
How long does an aftercare project take?
Typical aftercare ranges from a few weeks to multiple months, depending on defect severity and building complexity.
Related Services
The refurbishment of the façade on this outstanding adaptive reuse project is particularly successful, combining sensitive repairs and reuse of the primary framing and curtain walling channels.
Ingrid Petit, Fielden Fowles