SprayGrade vs TopSpray 35
Commercial System Selection Guide
SprayGrade and TopSpray 35 are both spray-applied coating systems used in commercial roof and cladding refurbishment. The correct system depends on substrate type, project objectives and specification requirements. This guide helps building owners, surveyors and specifiers determine which system is most appropriate for a particular project.
System Overview
Liquid Rubber SprayGrade
Two-Component Spray-Applied Membrane
Liquid Rubber SprayGrade is a water-based, VOC-free, two-component spray-applied membrane for large-area commercial waterproofing and protection. The system forms a seamless, elastomeric membrane that bridges cracks and accommodates substrate movement. SprayGrade is commonly specified for waterproofing-led refurbishment programmes where substrate compatibility and area efficiency are priorities.
- Water-based, VOC-free formulation
- Two-component spray application
- Seamless elastomeric membrane
- Bridges cracks and accommodates movement
- Application rates exceeding 600m² per day
- 15-year product warranty
- Broad substrate compatibility
Prokol TopSpray 35
High-Build Spray-Applied Coating
Prokol TopSpray 35 is a high-build spray-applied coating for profiled metal cladding and roofs. The system provides UV-resistant, colour-stable finish with enhanced appearance performance. TopSpray 35 is commonly specified for appearance-led refurbishment programmes where colour restoration, aesthetic improvement and extended warranty pathways are priorities.
- High-build spray-applied coating
- UV-resistant, colour-stable finish
- RAL colour matching capability
- Enhanced appearance performance
- Warranty pathways up to 25 years
- Metal cladding and roof specialist
- Cut edge corrosion protection
Substrate Suitability
Different substrates require different system specifications. The following table indicates which substrates each system is suitable for.
| Substrate Type | SprayGrade | TopSpray 35 |
|---|---|---|
| Profiled Steel Sheets | Suitable for waterproofing-led refurbishment | Primary application — appearance-led refurbishment |
| Aluminium Sheeting | Compatible with appropriate primer | Compatible with appropriate primer |
| Asbestos Cement Sheets | Commonly specified for encapsulation | Not typically specified for asbestos encapsulation |
| Composite Panels | Compatible with joint detailing | Compatible with joint detailing |
| Built-Up Felt Roofs | Waterproofing membrane capability | Not suitable for felt substrates |
| Single-Ply Membranes (EPDM, PVC, TPO) | Adhesion assessment required | Not designed for single-ply membranes |
| Concrete Decks | Suitable for flat roof waterproofing | Not designed for concrete decks |
| Profiled Metal Cladding | Waterproofing focus, limited colour options | Optimal substrate — appearance restoration and corrosion protection |
Application Suitability
Different applications require different system specifications. The following table indicates which applications each system is suitable for.
| Application | SprayGrade | TopSpray 35 |
|---|---|---|
| Commercial Roof Refurbishment | HighCommonly specified for large-area roof refurbishment where waterproofing is primary concern | HighCommonly specified for metal roof refurbishment where appearance and longevity are priorities |
| Industrial Roof Refurbishment | HighWell-suited to industrial environments. Cost-efficient for large estates | HighWell-suited to industrial metal roofs. Enhanced corrosion protection |
| Warehouse Roof Refurbishment | HighArea-efficient application. Cost-effective for large-span warehouse roofs | HighSuitable for warehouse roofs. Appearance benefits for high-visibility buildings |
| Flat Roof Refurbishment | HighPrimary system for flat roof waterproofing refurbishment | Not RecommendedNot designed for flat roof waterproofing |
| Asbestos Roof Encapsulation | HighCommonly specified for asbestos encapsulation. Seals fibres without removal | Not RecommendedNot typically specified for asbestos encapsulation |
| Commercial Cladding Refurbishment | ModerateCan be used where waterproofing takes priority over appearance | HighPrimary system for cladding refurbishment. Appearance restoration and corrosion protection |
| Commercial Gutter Refurbishment | HighCommonly specified for box gutter and valley gutter refurbishment | Not RecommendedNot designed for gutter refurbishment |
| Cut Edge Corrosion Treatment | ModerateProvides waterproofing over treated edges. ProFix often used for dedicated cut edge treatment | HighProvides dedicated cut edge corrosion protection with warranty pathways |
System Selection Decision Framework
The following framework helps building owners, surveyors and specifiers determine which system is most appropriate for a particular project.
Primary Project Objective
Waterproofing restoration, leak elimination, substrate protection. Functional performance prioritised over appearance.
Appearance restoration, colour renewal, long-term coating protection. Aesthetic performance prioritised alongside protection.
Substrate Type
Broad compatibility: metal, asbestos, felt, single-ply, concrete, composite. Single system for mixed-substrate estates.
Metal substrates: profiled steel, aluminium, composite panels. Specialist system for metal cladding and roofs.
Roof Condition
Roofs with water ingress, failed laps, cracks, gaps requiring bridging. Substrate movement expected.
Roofs with coating degradation, cut edge corrosion, colour fading. Structurally sound with cosmetic deterioration.
Appearance Requirements
Functional waterproofing. Limited colour options. Appearance secondary to performance.
Enhanced appearance. RAL colour matching. UV-resistant, colour-stable finish. Aesthetic priority.
Budget Considerations
Cost-efficient for large areas. High application rates reduce labour time. Budget-led specifications.
Premium system. Extended warranty pathways. Appearance-led value. Performance-led specifications.
Programme Requirements
High application rates (600m²+ per day). Fast programme completion. Large-area efficiency.
Standard application rates. Quality-focused programme. Detail-oriented application.
Warranty Pathways
15-year product warranty. Standard warranty coverage for commercial refurbishment.
Up to 25-year warranty pathways subject to specification. Extended warranty options available.
Asbestos Presence
Commonly specified for asbestos encapsulation. Seals fibres in situ without removal.
Not typically specified for asbestos applications. SprayGrade preferred for asbestos encapsulation.
Gutter Refurbishment
Commonly specified for box gutters and valley gutters. Seamless lining eliminates leak paths.
Not designed for gutter applications. ProFix or SprayGrade preferred for gutter refurbishment.
Flat Roof Refurbishment
Primary system for flat roof waterproofing. Compatible with felt, single-ply and concrete decks.
Not designed for flat roof applications. Specialist flat roof waterproofing systems required.
SprayGrade vs TopSpray 35: FAQs
What Is The Difference Between SprayGrade And TopSpray 35?
SprayGrade is a two-component spray-applied waterproofing membrane designed for broad substrate compatibility and large-area application. It forms a seamless, elastomeric membrane that bridges gaps and accommodates movement. TopSpray 35 is a high-build spray-applied coating designed specifically for profiled metal cladding and roofs, providing UV-resistant, colour-stable finish with enhanced appearance performance. SprayGrade is waterproofing-led; TopSpray 35 is appearance-led with protective coating performance.
Which System Is Best For Commercial Roof Refurbishment?
The correct system depends on substrate type and project objectives. For metal roofs where appearance and cut edge corrosion protection are priorities, TopSpray 35 is commonly specified. For asbestos roofs, flat roofs, or projects where waterproofing is the primary concern, SprayGrade is commonly specified. For large-area industrial estates where cost efficiency and programme speed are priorities, SprayGrade may be preferred. A site assessment determines the most appropriate system for a specific building.
Which System Is Best For Commercial Cladding Refurbishment?
TopSpray 35 is the primary system specified for commercial cladding refurbishment. It provides appearance restoration, UV protection, colour stability and cut edge corrosion treatment on profiled metal cladding. SprayGrade can be used on cladding where waterproofing takes priority over appearance, but this is less common. A site assessment determines cladding condition and appropriate system selection.
Can Both Systems Be Used On Metal Roofs?
Yes, both systems can be used on profiled metal roofs. TopSpray 35 is optimal for metal roofs where appearance, colour restoration and cut edge corrosion protection are priorities. SprayGrade is suitable for metal roofs where waterproofing is the primary concern, where substrate movement is expected, or where cost-efficient large-area application is required. System selection depends on project objectives and roof condition.
Can Either System Be Used On Flat Roofs?
SprayGrade is commonly specified for flat roof refurbishment including built-up felt, single-ply membranes and concrete decks. TopSpray 35 is not designed for flat roof applications. For flat roof waterproofing refurbishment, SprayGrade or specialist flat roof waterproofing systems are appropriate. A site assessment determines flat roof condition and appropriate system selection.
Can Either System Be Used For Asbestos Encapsulation?
SprayGrade is commonly specified for asbestos roof encapsulation. The system seals asbestos fibres in situ, restores waterproofing performance and avoids the cost and disruption of licensed removal. TopSpray 35 is not typically specified for asbestos encapsulation. For asbestos roof refurbishment, SprayGrade is the appropriate system. A site assessment confirms substrate suitability.
Can Both Systems Be Used On The Same Project?
Yes, both systems can form part of the same project. For example, SprayGrade may be specified for gutter refurbishment and asbestos sections, while TopSpray 35 may be specified for profiled metal roof sections. System selection should be based on substrate type, condition and performance requirements for each building section. A site assessment determines appropriate system specification for each area.
What Preparation Is Required For Each System?
Both systems require proper surface preparation for long-term performance. SprayGrade preparation typically includes surface cleaning, removal of failed coatings, corrosion treatment, and localised repairs. TopSpray 35 preparation typically includes surface cleaning, cut edge corrosion treatment, failed coating removal, and primer application where required. Preparation represents a significant portion of total project cost for both systems. A site assessment determines preparation requirements.
What Affects System Selection?
System selection depends on multiple factors: • Substrate type — metal, asbestos, felt, concrete, composite • Roof condition — corrosion extent, coating adhesion, water ingress routes • Project objectives — waterproofing, appearance, lifecycle extension • Budget considerations and warranty requirements • Programme constraints and environmental exposure A site assessment evaluates these factors and recommends the appropriate system for a specific building.
Which System Is More Appropriate For Ageing Roof Assets?
For ageing roof assets with widespread coating degradation, cut edge corrosion and cosmetic deterioration but sound structural condition, TopSpray 35 provides appearance restoration and extended warranty pathways. For ageing assets with water ingress, substrate movement, or mixed substrate types, SprayGrade provides waterproofing restoration and broad compatibility. Asset managers should commission a roof condition survey to determine appropriate system selection based on actual condition rather than age alone.
What Warranty Pathways Are Available?
SprayGrade carries a 15-year product warranty. TopSpray 35 offers warranty pathways of up to 25 years subject to specification compliance and manufacturer approval. Extended warranties may require additional specification steps, manufacturer assessment and sign-off. Warranty terms and conditions apply. Forti Nova approved applicators will advise on appropriate warranty pathways for specific projects.
Do I Need A Site Assessment Before System Selection?
Yes. A site assessment is essential before system selection. The assessment determines substrate type, substrate condition, water ingress routes, preparation requirements and appropriate system specification. Without assessment, it is not possible to recommend the correct system. Following assessment, a Forti Nova approved applicator will provide a project-specific specification and quotation based on the agreed system selection.
Can I Switch Systems Between Different Buildings In My Portfolio?
Yes. Portfolio managers often specify different systems for different buildings based on substrate type, condition and project objectives. For example: • SprayGrade may be specified for asbestos and flat roof buildings • TopSpray 35 may be specified for profiled metal roof buildings System selection should be based on building-specific assessment rather than portfolio-wide standardisation. Forti Nova can support multi-building assessment programmes with standardised reporting.
What Maintenance Is Required After Application?
Both systems benefit from regular maintenance to ensure long-term performance. Maintenance typically includes annual visual inspection, biennial cleaning, drainage maintenance, penetration inspection, and prompt repair of any localised damage. Maintenance requirements are similar for both systems. Regular maintenance protects warranty validity and ensures the coating delivers expected service life. Maintenance guidance is provided at project handover.
How Do I Arrange A System Assessment?
To arrange a system assessment, request a site assessment through the Forti Nova assessment form. A Forti Nova approved applicator will inspect the building, assess substrate condition, identify the roof type, evaluate existing coating adhesion, and map any localised problems. Following assessment, the applicator will recommend the appropriate system and provide a project-specific quotation. The assessment also identifies any conditions that may preclude refurbishment.
Request System Assessment
A site assessment determines which system is most appropriate for your building. Submit your details and a Forti Nova approved applicator will inspect the building, assess substrate condition, and recommend the appropriate system.