Typical Fees
Independent technical diagnostics that can help avoid significantly greater repair costs later. The fees below reflect specialist expertise, equipment and professional reporting.
A correctly diagnosed building-envelope defect can prevent unnecessary repair expenditure, repeated contractor visits and costly disruption.
How Investigation Fees Work
Fees are structured by investigation depth and reporting scope — not arbitrary ranges. Complex projects involving large buildings, multiple visits or extensive reporting are quoted individually.
Desktop Technical Review
From £250
Remote review of drawings, photographs and available documentation.
Site Investigation
From £650
On-site inspection and assessment of the reported problem.
Detailed Investigation & Report
From £750
Site investigation with comprehensive technical findings and reporting.
Complex Multi-Day Investigation
By Quotation
Large-scale or multi-visit investigations quoted individually.
Investigation Services
Independent investigation of water ingress, moisture, condensation and façade defects.
Water Ingress Investigation
Typical Reasons Clients Contact Vertex
- Recurring leaks that previous repairs have failed to resolve
- Water ingress through roofs, façades, balconies or interfaces
- Internal moisture staining
- Wind-driven rain penetration
- Independent technical assessment before major repair works
What the Investigation May Include
- Desktop review of available drawings and photographs
- Site inspection
- Investigation of moisture pathways
- Roof and façade interface assessment
- Photographic defect schedule
- Identification of likely failure mechanisms
What You Receive
- Technical findings
- Photographic evidence
- Practical remediation recommendations
- Comprehensive investigation report
Typical Guide Fee
From £750
Complex investigations involving large buildings, multiple visits or extensive reporting are quoted individually.
Damp & Moisture Assessment
Typical Reasons Clients Contact Vertex
- Persistent damp that has not been explained
- Unexplained moisture or moisture staining
- Recurring damp patches
- Uncertain moisture source
- Independent assessment before remediation
What the Investigation May Include
- Desktop review of available information
- Site inspection and visual assessment
- Moisture mapping where appropriate
- Construction detail review
- Thermal performance review
- Identification of likely contributing factors
What You Receive
- Technical findings
- Photographic evidence
- Likely contributing factors
- Practical remediation recommendations
Typical Guide Fee
From £500
Complex investigations involving large buildings, multiple visits or extensive reporting are quoted individually.
Condensation Investigation
Typical Reasons Clients Contact Vertex
- Condensation concerns
- Mould-related building conditions
- Cold surfaces
- Suspected thermal bridging
- Insulation-related concerns
- Ventilation interaction concerns
What the Investigation May Include
- Desktop review of construction and occupancy information
- Site inspection and visual assessment
- Surface temperature observations
- Construction and insulation review
- Ventilation interaction review
- Thermal risk assessment
What You Receive
- Technical findings
- Likely contributing factors
- Practical remediation recommendations
- Investigation summary
Typical Guide Fee
From £500
This is a building-envelope technical assessment and does not constitute medical or health advice. Complex investigations are quoted individually.
Façade Defect Investigation
Typical Reasons Clients Contact Vertex
- Cracked render or EWI defects
- Façade staining or biological growth
- Delamination
- Sealant failure
- Junction or interface failure
- Water ingress through the façade
What the Investigation May Include
- Desktop review of drawings and specifications
- Site inspection of façade system
- Defect mapping where required
- Construction detail and junction review
- Photographic record
- Identification of likely failure mechanisms
What You Receive
- Technical findings
- Photographic evidence
- Likely contributing factors
- Practical remediation recommendations
Typical Guide Fee
From £750
Complex investigations involving large buildings, multiple visits or extensive reporting are quoted individually.
Condition Surveys
Structured condition surveys and building envelope reviews with photographic defect records.
Roof Condition Survey
Typical Reasons Clients Contact Vertex
- Planned maintenance planning
- Pre-purchase or pre-lease assessment
- Warranty or insurance assessment
- Repair prioritisation
- Asset condition recording
- Recurring defect investigation
What the Investigation May Include
- Desktop review of available roof information
- Comprehensive roof inspection
- Waterproofing system assessment
- Interface and detail review
- Drainage and outlet inspection
- Photographic defect schedule
What You Receive
- Condition assessment
- Photographic defect record
- Defect schedule
- Priority recommendations
Typical Guide Fee
From £750
Complex surveys involving large roofs or extensive reporting are quoted individually.
Façade Condition Survey
Typical Reasons Clients Contact Vertex
- Planned maintenance planning
- Pre-purchase or pre-lease assessment
- Render or cladding condition concerns
- Staining or biological growth
- Sealant or joint failure
- Repair prioritisation
What the Investigation May Include
- Desktop review of available façade information
- Comprehensive façade inspection
- Render and cladding assessment
- Sealant and movement joint review
- Interface and detail review
- Photographic defect schedule
What You Receive
- Condition assessment
- Photographic defect record
- Defect schedule
- Priority recommendations
Typical Guide Fee
From £750
Complex surveys involving large façades or extensive reporting are quoted individually.
Building Envelope Review
Typical Reasons Clients Contact Vertex
- Comprehensive building condition assessment
- Pre-purchase or pre-lease due diligence
- Multi-defect investigation
- Repair and maintenance planning
- Warranty or insurance assessment
- Asset management support
What the Investigation May Include
- Desktop review of available drawings and specifications
- Comprehensive roof inspection
- Comprehensive façade inspection
- Interface and junction assessment
- Window and penetration review
- Photographic defect schedule
What You Receive
- Comprehensive envelope review
- Photographic record
- Defect schedule
- Priority recommendations
- Suggested next steps
Typical Guide Fee
From £1,000
Complex reviews involving large or multiple buildings are quoted individually.
Specialist Flat Roof Testing
Electronic Leak Detection for suitable non-conductive flat roof membranes.
Electronic Leak Detection for Flat Roofs
Typical Reasons Clients Contact Vertex
- Recurring flat roof leaks
- Membrane defects or breaches
- Difficult-to-locate leak sources
- Pre-handover membrane testing
- Post-repair verification
- Membrane integrity concerns
- Waterproofing quality assurance
What the Investigation May Include
- Project suitability review
- Test scope confirmation
- On-site electronic testing
- Defect identification where applicable
- Photographic evidence
- Marked defect locations where appropriate
What You Receive
- Technical findings summary
- Photographic evidence
- Marked defect locations where appropriate
- Recommended next steps
Typical Guide Fee
From £750
Pricing depends on roof size, roof accessibility, investigation objectives, roof construction, reporting requirements and site location. Every enquiry receives a suitability review before a quotation is issued.
Technical Consultancy Rates
U-values, thermal bridge reviews, specification support and technical detail reviews.
U-Value Assessment
From £250
Thermal Bridge Review
From £350
Technical Detail Review
From £300
Specification Review
From £300
Technical Support
From £85/hour
Day Rate
From £650/day
Larger or specialist analysis is quoted individually. Please confirm your specific requirements at enquiry stage so the appropriate scope and fee can be provided.
The objective is not simply to identify defects, but to provide clients with the technical evidence needed to make informed repair decisions.
Typical fees are provided for guidance only and are not fixed quotations. Final fees depend on project complexity, site location, access requirements, available information and the agreed scope of investigation or reporting. A written proposal will be provided before work begins.