Roof Condition Survey
Professional Assessment Of Commercial & Industrial Roof Condition
A roof condition survey systematically assesses the physical condition of a commercial or industrial roof. The survey identifies defects, quantifies deterioration, and provides the factual basis for all refurbishment or replacement decisions. Without a condition survey, building owners are making decisions based on incomplete information.
What Is A Roof Condition Survey?
A roof condition survey is a systematic inspection of a commercial or industrial roof to assess its current physical condition. The survey examines all roof components — sheets, fixings, laps, penetrations, abutments and drainage — to identify defects, quantify deterioration and determine remaining service life. Internal soffit inspection is also carried out to identify water ingress routes and condensation issues not visible externally.
Why Building Owners Commission Condition Surveys
Proactive Asset Management
Identify issues before they become critical and expensive
Budget Planning
Accurate cost estimates for capital expenditure planning
Reactive Response
Investigate leaks, water ingress or visible deterioration
Due Diligence
Pre-acquisition or pre-disposal building assessment
Compliance
Lease obligations, insurance requirements or regulatory compliance
Specification Development
Factual basis for refurbishment or replacement specification
Typical Problems Identified During Surveys
Roof condition surveys identify a wide range of defects and deterioration mechanisms. The following problems are commonly identified during commercial roof surveys. Each problem requires specific assessment methodology and remediation approach.
Cut Edge Corrosion
Progressive corrosion at sheet edges — mapped across all elevations to determine treatment scope.
Learn MoreCoating Failure
Delamination, flaking or blistering — adhesion testing quantifies extent of failure.
Learn MoreWater Ingress
Active leaks traced to external entry points at laps, fixings or penetrations.
Learn MoreStanding Water & Ponding
Poor drainage identified — low spots, blocked outlets and drainage defects mapped.
Learn MoreFaded & Chalking Coatings
UV degradation documented — coating film thickness measured across elevations.
Learn MoreRust Staining
Active corrosion sources identified — fixing corrosion, cut edges or through-panel corrosion.
Learn MoreCondition Severity & Risk Assessment Framework
Condition surveys assess not only what defects exist, but how severe they are and what risk they present. The following proof blocks demonstrate how surveyors translate observed conditions into severity ratings and risk assessments that inform specification decisions.
Condition
Localised coating failure with sound substrate
Severity
Risk
Continued deterioration and increased likelihood of water ingress if left unmanaged.
Potential Next Step
Assessment of repair suitability and remaining service life. Monitoring may be appropriate pending further investigation. Refurbishment suitability to be assessed.
Condition
Widespread cut edge corrosion affecting 40-60% of roof area
Severity
Risk
Progressive corrosion leading to perforation. Replacement costs increasing if delayed.
Potential Next Step
Further investigation to confirm corrosion extent and remaining sheet thickness. Remediation options cannot be determined until substrate condition is assessed.
Condition
Active water ingress at multiple penetrations
Severity
Risk
Internal asset damage, operational disruption and potential health & safety concerns.
Potential Next Step
Immediate investigation to identify ingress routes. Temporary containment may be required. Full scope of works cannot be determined until ingress sources are confirmed.
Condition
Ponding water persisting beyond 48 hours after rainfall
Severity
Risk
Increased loading and accelerated membrane degradation. Structural implications cannot be confirmed without engineering assessment.
Potential Next Step
Drainage survey and engineering assessment recommended. Suitability for coating programme cannot be confirmed until drainage and structural questions are resolved.
Condition
Surface chalking with intact coating film
Severity
Risk
Appearance degradation only. Substrate remains protected at this stage. Low urgency.
Potential Next Step
Continue monitoring. Planned assessment within 12-24 months to confirm coating integrity before deterioration reaches substrate.
Condition
Failed sealants at abutments with visible gaps
Severity
Risk
Potential water ingress route. Internal damage possible during heavy rainfall.
Potential Next Step
Further investigation to confirm whether ingress is active. Sealant condition assessment recommended before specification decisions are made.
Condition
Corroded fixings with visible section loss
Severity
Risk
Sheet retention capacity may be reduced. Wind uplift performance may be affected. Engineering assessment recommended before conclusions on structural adequacy.
Potential Next Step
Engineering or structural assessment recommended. Fixing replacement may be required. Further investigation needed before any coating programme is considered.
Condition
Historic leak staining with no active ingress
Severity
Risk
Ingress route may have been resolved or may reactivate in severe weather.
Potential Next Step
Investigation to confirm ingress route status. Monitoring or intervention depending on findings.
Condition
Multiple incompatible coating layers with delamination
Severity
Risk
Substrate exposure risk increasing. Extent of underlying deterioration cannot be confirmed without further investigation.
Potential Next Step
Substrate condition assessment required. Preparation requirements and suitability for further works cannot be determined without investigation. Replacement suitability should also be assessed.
Condition
Asbestos cement sheets with surface weathering
Severity
Risk
Fibre exposure and waterproofing degradation are possible concerns. Regulatory compliance implications require specialist assessment.
Potential Next Step
Asbestos survey and specialist condition assessment recommended. Intervention options cannot be determined without specialist findings.
Condition
Thermal movement cracks at long-run sheet ends
Severity
Risk
Recurring ingress route possible. Seasonal movement may cause repeat failure if not addressed through appropriate detailing.
Potential Next Step
Movement assessment recommended. Detailing review required before any remediation is proposed. Monitoring may be appropriate pending further investigation.
Condition
Bird nesting material blocking drainage outlets
Severity
Risk
Drainage performance may be reduced. Ponding risk and biosecurity concerns.
Potential Next Step
Drainage clearance and pest exclusion assessment recommended. Condition monitoring following clearance before any further decisions.
Condition
Graffiti or chemical staining on coated surfaces
Severity
Risk
Appearance degradation. Potential coating damage if chemical attack evident.
Potential Next Step
Cleaning trial to assess coating integrity. Re-coating if cleaning reveals damage.
Condition
Membrane blistering on built-up felt roof
Severity
Risk
Blister rupture may create ingress route. Deterioration may spread if unaddressed.
Potential Next Step
Moisture survey to quantify trapped water extent. Remediation scope cannot be determined without moisture survey findings.
Condition
Rust staining on internal soffits matching external laps
Severity
Risk
Active water tracking indicated. Internal environment affected. Asset protection risk.
Potential Next Step
External investigation to confirm ingress route. Internal scope cannot be determined until source is identified. Further investigation before specification is recommended.
Roof Condition Survey Process
A structured survey process ensures comprehensive assessment and consistent reporting. The survey methodology is adapted to building type, access constraints and client requirements.
Pre-Survey Information
Building age, construction type, previous works and known issues collected. Satellite imagery reviewed where available.
Close-Range External Inspection
All roof elevations examined using MEWP, scaffolding or rope access. Penetrations, abutments, laps and fixings inspected.
Internal Soffit Inspection
Internal inspection identifies water ingress routes, condensation issues and structural concerns not visible externally.
Substrate Condition Assessment
Adhesion testing, coating thickness measurement, corrosion depth assessment and substrate verification.
Photographic Documentation
Comprehensive photographic record of all defects, penetrations, abutments and general roof condition.
Condition Report
Detailed report with condition ratings, problem mapping, recommendations and budget estimates.
Roof Types Commonly Surveyed
Forti Nova's approved applicators survey all commercial and industrial roof types. Each roof type presents specific assessment considerations and requires specialist knowledge.
Profiled Steel Roofs
Single-skin steel sheets — cut edge corrosion and coating failure are primary assessment points.
Learn MoreComposite Panel Roofs
Insulated panel systems — joint condition and capsule integrity are critical assessment areas.
Learn MoreAsbestos Cement Roofs
Asbestos sheets requiring encapsulation assessment — structural condition and fibre exposure evaluated.
Learn MoreStanding Seam Roofs
Concealed fixings — seam integrity and thermal movement assessment required.
Learn MoreBuilt-Up Felt Roofs
Flat roof membranes — blistering, cracking and water ingress routes assessed.
Learn MoreSingle-Ply Membrane Roofs
EPDM, PVC or TPO membranes — seam integrity and puncture damage assessed.
Learn MoreSystems Commonly Specified Following Surveys
Survey findings determine which systems are appropriate for remediation. The following systems are commonly specified based on survey recommendations.
Liquid Rubber SprayGrade
- Large-area refurbishment
- Asbestos encapsulation
- Waterproofing-led specs
- Budget efficiency
Warranty: 15-year product warranty
View System DetailsProkol TopSpray 35
- Appearance-led refurbishment
- Colour restoration
- Premium specs
- Long-term warranties
Warranty: Up to 25-year warranty pathways
View System DetailsRocathaan Hotspray PA 260-FR
- Specialist polyurea waterproofing
- New-build waterproofing
- Technical specifications
Warranty: Up to 35-year warranty pathways
View System DetailsProFix
- Localised repairs
- Cut edge treatment
- Emergency leaks
- Penetration detailing
Warranty: Up to 10-year protection
View System DetailsWho This Service Is For
Roof condition surveys are relevant to any building owner, asset manager or facilities manager who needs an objective, documented assessment of a commercial or industrial roof — whether for reactive investigation, proactive maintenance planning or due diligence.
Asset Managers
Condition surveys provide factual data for capital expenditure planning, lifecycle forecasting and asset management reporting. Multi-building portfolio surveys establish consistent condition baselines.
Facilities Managers
Investigating active leaks, visible deterioration or reported performance issues. Surveys trace ingress to source and recommend remediation — preventing repeated reactive spend on symptoms.
Building Owners & Surveyors
Pre-acquisition due diligence, pre-disposal assessment and lease event condition reporting. Survey reports provide independent, documented evidence of roof condition at a point in time.
Roof Condition Survey: Frequently Asked Questions
What Is A Roof Condition Survey?
A roof condition survey is a systematic inspection of a commercial or industrial roof to assess its current physical condition. The survey examines all roof components including sheets, fixings, laps, penetrations, abutments and drainage. Internal soffit inspection is also carried out to identify water ingress routes and condensation issues. The survey produces a condition report with photographic evidence, condition ratings for each roof element, and recommendations for remediation or monitoring. Roof condition surveys are essential for asset management, budget planning and specification development.
How Do You Assess Roof Condition?
Roof condition is assessed through a combination of visual inspection, substrate testing and photographic documentation. Visual inspection examines coating condition, corrosion extent, fixing integrity, lap and seam condition, and drainage function. Substrate testing may include: • Adhesion tests — pull-off tests to quantify coating adhesion • Coating thickness measurement — gauges to measure remaining film thickness • Corrosion depth assessment — to determine remaining sheet thickness The surveyor also examines internal soffits for water staining, corrosion breakthrough and condensation indicators. All findings are documented with photographs and condition ratings.
What Is Included In A Roof Condition Survey?
A roof condition survey includes: • External elevation survey — all roof planes examined at close range • Fixing condition assessment — corrosion, sealant failure, loosening • Lap and seam inspection — sealant condition, water tracking, mechanical damage • Penetration survey — rooflights, vents, extraction units • Abutment and flashing inspection — sealant failure, mechanical damage • Drainage assessment — blocked outlets, ponding water, defective gutters • Internal soffit inspection — water staining, corrosion breakthrough, condensation • Substrate testing — adhesion, coating thickness, corrosion depth • Photographic documentation and written report with condition ratings and recommendations
How Do You Identify Cut Edge Corrosion?
Cut edge corrosion is identified through close-range visual inspection of sheet edges. The surveyor looks for: • Rust staining at cut edges — brown/orange discolouration running down from edges • Coating undermining — coating lifting away as corrosion tracks beneath • Section loss — visible reduction in sheet thickness at edges • Perforation — holes where corrosion has progressed through the sheet Corrosion extent is mapped across all elevations to determine treatment scope. In advanced cases, ultrasonic thickness gauges are used to quantify remaining sheet thickness.
How Do You Identify Coating Failure?
Coating failure is identified through visual inspection and adhesion testing. Visual indicators include: • Delamination — coating lifting away from substrate in sheets or blisters • Flaking — coating breaking away in fragments • Through-cracking — cracks extending through the full coating thickness • Inter-coat adhesion failure — separation between multiple coating layers Adhesion testing (pull-off tests) quantifies the bond strength between coating and substrate. Areas of failed adhesion are mapped to determine preparation requirements.
How Do You Identify Water Ingress?
Water ingress is identified through a combination of external and internal inspection. External inspection looks for: • Failed sealants at laps and penetrations • Corroded or loose fixings allowing water tracking • Cut edge corrosion perforations • Defective flashings or abutments Internal soffit inspection identifies: • Water staining on internal surfaces • Corrosion breakthrough — rust visible on the internal sheet surface • Damp insulation where visible • Condensation indicators — mould, water droplets, corrosion on internal face The surveyor traces internal staining to external entry points, noting that water may travel along structural elements before appearing internally.
What Should Happen After A Roof Survey?
After a roof survey, the following steps should follow: 1. Survey report production — typically within 5–10 working days 2. Client review of findings and clarification of questions 3. System specification development based on survey recommendations 4. Budget estimate refinement based on agreed specification 5. Programme planning considering weather windows and operational constraints 6. Contractor selection through Forti Nova's approved applicator network 7. Pre-contract site meeting to confirm methodology and access 8. Programme commencement with agreed start date The survey report is the foundation for all subsequent decisions. It should not be bypassed.
How Do Roof Surveys Reduce Capital Expenditure?
Roof surveys reduce capital expenditure through informed specification. Without a survey, building owners risk: • Over-specification — paying for unnecessary works • Under-specification — inadequate works failing prematurely • Inappropriate specification — wrong system for the substrate or conditions • Missed defects — problems not addressed until they become critical and expensive A professional survey identifies the minimum necessary works to achieve the required performance. Surveys also enable competitive tendering with defined scopes, allowing accurate comparison of contractor quotations.
How Can Surveys Extend Building Life?
Surveys extend building life by enabling proactive intervention. Early identification of issues allows treatment before problems become critical: cut edge corrosion treated before perforation, coating degradation addressed before substrate exposure, minor leaks repaired before internal damage, and drainage defects corrected before ponding causes structural loading. Surveys also inform maintenance planning — knowing which elements are approaching end of life allows planned replacement rather than emergency response. Regular survey cycles (every 3-5 years) create a condition history that supports long-term asset management.
How Often Should Commercial Roofs Be Surveyed?
Commercial roofs should typically be surveyed every 3–5 years for proactive asset management. Survey frequency depends on multiple factors: • Roof age — older roofs benefit from more frequent surveys • Environmental exposure — coastal, industrial or high-altitude locations accelerate deterioration • Known defects — roofs with identified issues should be monitored more frequently • Warranty requirements — some warranties require periodic inspection Reactive surveys should be carried out following severe weather events, reported leaks, or visible deterioration.
Who Should Carry Out A Roof Condition Survey?
Roof condition surveys should be carried out by qualified professionals with specific experience in commercial and industrial roofing. Surveyors should have: • Technical knowledge of roofing systems and materials • Understanding of failure modes and deterioration mechanisms • Competence in substrate testing methods • Ability to identify ingress routes and condensation issues • Experience in specification development Forti Nova's approved applicators carry out roof condition surveys as part of their service offering. Surveyors should carry appropriate insurance and work to recognised industry standards.
What Access Is Required For A Roof Survey?
Access requirements depend on building height, roof configuration and site constraints. Common access methods include: • MEWP — scissor lifts or cherry pickers for buildings under approximately 15m eaves height • Scaffolding — for taller buildings or where MEWP access is restricted • Rope access — for difficult-to-reach areas or where traditional access is impractical • Internal access — for soffit inspection, typically via existing hatches The survey provider will advise on appropriate access methods based on the specific building. Access costs are typically included in survey quotations.
How Long Does A Roof Condition Survey Take?
Survey duration depends on roof size, complexity and access arrangements. Indicative durations: • Under 1,000 m² — half a day • 1,000–5,000 m² — one full day • 5,000–20,000 m² — 2–3 days • 20,000+ m² or multi-building sites — phased surveys over multiple days or weeks Report production typically takes 5–10 working days after site inspection. Programme constraints can extend survey duration. The survey provider will advise on expected duration for your specific building.
What Does A Roof Condition Report Include?
A roof condition report typically includes: • Executive summary — key findings and recommendations • Building information — age, construction type, previous works • Survey methodology — access methods and testing carried out • Condition ratings for each roof element (sheets, fixings, laps, penetrations, abutments, drainage) • Photographic evidence — annotated photographs of defects and general condition • Problem mapping — location-specific defect identification • System recommendations — appropriate remediation options • Scope of works — outline specification for recommended works • Budget estimates — order-of-magnitude cost guidance The report should provide sufficient information for specification development and budget planning.
Can A Roof Condition Survey Identify Asbestos?
A roof condition survey can identify suspected asbestos-containing materials based on visual characteristics and building age. However, definitive asbestos identification requires laboratory analysis of samples. Surveyors will note suspected asbestos materials and recommend appropriate management (encapsulation, monitoring or licensed removal). Asbestos cement roofs are commonly identified during surveys — these roofs can often be encapsulated rather than removed, significantly reducing cost and disruption. Where asbestos is suspected, the survey report will recommend appropriate next steps including asbestos survey or analysis.
Request A Roof Condition Survey
A professional roof condition survey is the essential first step in understanding your roof's current state and planning appropriate remediation. Submit your details and a Forti Nova approved applicator will contact you to arrange a comprehensive survey.