SprayGrade Two-Component Spray Waterproofing Membrane
SprayGrade is a two-component, cold-applied, water-based liquid-rubber spray membrane for suitable commercial roof waterproofing and refurbishment. Applied using dedicated two-component spray equipment to form a seamless fully bonded membrane. Substrate condition, moisture, equipment access, preparation, detailing and system compatibility must be confirmed before specification.
Composition
Two-Component Water-Based
Application
Specialist Spray Equipment
Membrane Build
Approx. 2.7 kg/m² at 2 mm nominal
Warranty
Up to 15-Year — Qualifying Installations
SprayGrade Quick Answers
Forti Nova is the UK exclusive importer for Liquid Rubber systems, supporting SprayGrade projects through assessment, specification guidance, product supply, training and warranty-pathway coordination.
What it is
What is SprayGrade?
SprayGrade is a two-component, cold-applied, water-based liquid-rubber spray membrane used to form a seamless fully bonded waterproofing layer over suitable prepared substrates, applied using dedicated two-component spray equipment.
What it is used for
What is SprayGrade used for?
It may be used for suitable commercial roof waterproofing and refurbishment where specialist two-component spray application is appropriate, including suitable asbestos-cement refurbishment proposals following condition assessment and system confirmation.
What it is not
What is SprayGrade not designed to do?
It is not a structural repair system, traffic-bearing finish, primer, emergency repair compound or decorative coating. It is not suitable where specialist spray equipment cannot safely access the substrate.
Potential substrates
Which substrates may be suitable?
Potential substrates may include prepared metal roofing, concrete, bituminous surfaces in sound condition, compatible existing coatings and suitable asbestos-cement, subject to condition, moisture and adhesion assessment.
Before specifying
What should be assessed before specifying SprayGrade?
Review substrate condition, moisture, drainage, structural integrity, existing coatings, detailing scope, movement joints, equipment access logistics and any asbestos-related regulatory requirements.
Who specifies and applies
Who should specify or apply SprayGrade?
Specification and application should be undertaken by competent project professionals and trained approved applicators, using appropriate specialist spray equipment, with technical support where required.
Before use
What must be confirmed before SprayGrade is used?
Confirm substrate compatibility, moisture threshold, primer requirements, equipment access, weather conditions, detailing plan for penetrations and upstands, movement joint provision and the project-specific warranty pathway.
Related SprayGrade Guidance
Specialist Spray Application for Suitable Larger Areas
SprayGrade may provide a programme advantage on suitable larger continuous areas where access, preparation, equipment, weather and site conditions support specialist spray application. Its two-component formulation is mixed and applied in a single pass using dedicated spray equipment. HBS200 may be more appropriate where hand application and close control around gutters, penetrations, upstands and complex details are advantageous.
Commercial Roof Waterproofing
May be considered for suitable larger continuous commercial roof areas where specialist spray application and the required access, equipment logistics and preparation can be completed.
Industrial Roof Refurbishment
Suitable industrial roof refurbishment proposals may include metal, concrete and compatible existing substrate overlay where spray application is appropriate and the complete system can be confirmed.
Asbestos-Cement Roof Refurbishment
SprayGrade may form part of a project-specific asbestos-cement roof encapsulation or refurbishment proposal following condition assessment, risk review, preparation planning and confirmation of the complete system.
Fully Bonded Membrane Advantage
The seamless fully bonded membrane eliminates lateral water tracking beneath the membrane — a technical advantage over mechanically fixed or loose-laid systems on appropriate substrates.
SprayGrade or HBS200?
SprayGrade — Spray Applied
Generally considered for suitable larger continuous areas where specialist two-component spray application is justified. Requires dedicated equipment, access logistics and trained applicator with appropriate site controls.
HBS200 — Hand Applied
May be more appropriate where hand application and close control around gutters, penetrations, upstands and complex details are advantageous. The two systems may also be used within the same assessed project.
Equipment Access and Logistics
SprayGrade requires dedicated two-component spray equipment and trained approved applicators. Equipment access, rig positioning, water supply, set-up area and health and safety requirements must be assessed and confirmed before specification. Access constraints that make spray application impractical may mean HBS200 hand application is the appropriate system for that project. Spray-Applied Waterproofing Guide →
Is SprayGrade suitable for your project?
Suitability depends on substrate condition, moisture, structural integrity, detailing scope, equipment access logistics and system compatibility. Visual inspection alone is insufficient. A pre-specification survey is required before SprayGrade can be correctly specified.
Assessment Required
Moisture assessment on application day — not survey day — adhesion confirmation, equipment access logistics and structural condition verification are all required before SprayGrade can be specified.
Potentially Suitable Substrates
Subject to condition, moisture, adhesion and primer assessment for the confirmed substrate type.
- Prepared metal roofing — sound condition confirmed
- Concrete surfaces — moisture and adhesion assessed
- Bituminous surfaces — securely bonded, condition verified
- Compatible existing coatings — compatibility and adhesion confirmed
- Suitable asbestos-cement — following condition and risk assessment
Not Suitable For
- Substrates with elevated moisture — assess and confirm threshold before specification
- Traffic-bearing surfaces
- Structurally unsound substrates
- Concealing saturated insulation or unresolved trapped moisture
- Projects where spray equipment cannot safely access the substrate
- Emergency repairs or active leak situations
- Complex detailing-only work — use HBS200 hand application
Survey Requirements
- Moisture grid readings across roof area
- Probe testing at lap joints and edges
- Adhesion assessment to deck
- Drainage fall verification
- Equipment access and logistics planning
- Detailing scope quantification
- Movement joint review
Cannot Assess Visually
- Sub-surface moisture content
- Insulation saturation depth
- Deck structural condition
- Coating chemical composition
- Drainage capacity under load
- Thermal movement range
Common Failure Indicators
Blistering after application
Elevated substrate moisture at time of spray. Vapour pressure lifting membrane from below.
Required Response
Strip affected areas, allow substrate to dry, retest moisture and respray.
Cracking at laps and ridges
Movement joints omitted or undersized. Thermal expansion not accommodated in specification.
Required Response
Install correctly specified movement joints. Localised repair is temporary only.
Ingress at penetrations
Detailing incomplete at penetration junctions. Spray cannot provide adequate collar coverage on complex penetrations.
Required Response
Hand-apply each penetration collar to system specification using HBS200.
Specification Data
- Composition
- Two-component cold-applied water-based liquid-rubber spray membrane
- Application
- Dedicated two-component spray equipment — trained approved applicator required
- Coverage
- Approx. 2.7 kg/m² for nominal 2 mm membrane — confirm current TDS
- Cure
- Cure and recoat times depend on membrane thickness, temperature, humidity, ventilation and substrate conditions. Confirm current technical documentation before application.
Application, Preparation and Detailing
Preparation depends on the substrate and its condition — surfaces must be assessed for adhesion, contamination, moisture, loose material, corrosion and existing coatings. Penetrations, upstands and complex junctions require careful detailing and may require hand-application in addition to the spray field coat. Preparation quality determines membrane performance and warranty validity.
Note: Primer requirements must be confirmed during project assessment for each substrate type — they cannot be assumed in advance.
Weather and Environmental Controls
Spray application requires suitable dry weather and substrate conditions. Temperature, humidity, wind, rainfall risk and the required protection period must all be checked against the current technical documentation and project specification before application begins. Application records must be maintained throughout the project.
Warranty
Up to 15-Year Warranty on Qualifying Installations
Available on qualifying installations subject to the confirmed specification, preparation, specialist application and warranty requirements. All of the following conditions apply.
Substrate moisture confirmed below threshold on application day
Moisture must be tested immediately before spray application — not at survey stage. Assessment method must be appropriate to the substrate type and project conditions.
Trained approved applicator
Warranty pathway requires trained and manufacturer-approved contractor application using appropriate spray equipment.
Movement joints specified and installed
Thermal and structural movement must be accommodated via correctly specified and installed movement joints before membrane application.
All penetrations and upstands fully detailed
Each penetration, upstand, parapet and drainage outlet detailed to the confirmed system specification — spray alone is insufficient at these junctions.
Full system build-up maintained
Coverage rates and coat sequence must comply with the confirmed specification throughout the application area.
Application records maintained
Documented cure conditions, coverage confirmation, substrate moisture readings and applicator records required as part of the warranty pathway.
Gallery & Documents
Genuine SprayGrade project imagery and approved technical documentation.
SprayGrade applied seamless black liquid-rubber coating on commercial metal roof
SprayGrade waterproof membrane applied to concrete roof deck
SprayGrade seamless membrane on concrete substrate — completed installation
SprayGrade liquid-rubber coating applied to industrial metal structure
SprayGrade commercial roof waterproofing with edge detailing
SprayGrade two-component liquid-rubber system application
SprayGrade spray application on commercial roof deck
SprayGrade seamless coverage across large commercial roof area
Technical Documentation
SprayGrade Technical Documentation — Available on Request
Technical Data Sheets, Safety Data Sheets and application guidance are available directly from our technical team. Email Info@FortiNova.co.uk with the product name and document type required.
SprayGrade — Technical Information
SprayGrade — Technical Data Sheet
Available to download. Confirm current version before specification.
Safety Data Sheet — Component A
Available on request — contact technical team.
Safety Data Sheet — Component B
Available on request — contact technical team.
Application and Project Planning Guidance
Project-specific guidance available on request.
Related Systems
Important: All technical datasheets and safety documentation must be reviewed prior to specification and installation. Any warranty is project-specific and conditional on full compliance with manufacturer application requirements and trained approved applicator installation.
SprayGrade Common Questions
Specification intelligence for contractors, specifiers and facilities managers.
Discuss a SprayGrade Project
Submit your project details for technical assessment, equipment and application planning, and specification support from the Forti Nova team.
Technical Assessment
Substrate suitability, moisture conditions and system compatibility reviewed before specification.
Equipment and Application Planning
Access logistics, equipment requirements and applicator coordination confirmed for your project.
Specification and Warranty-Pathway Coordination
Full system build-up, preparation requirements and warranty conditions confirmed before work begins.
SprayGrade Applicator Training — Blackburn, UK
Hands-On Product Training
Forti Nova hosts comprehensive SprayGrade application training at our Blackburn facility. Practical, hands-on instruction covering substrate preparation, mixing ratios, application techniques, detailing, and quality control. Designed for contractors and applicators seeking specification-grade installation capability.
- Substrate assessment and preparation protocols
- System-specific mixing and application
- Detailing for complex geometries
- Quality control and inspection procedures
- Environmental constraints and cure management
Approved Applicator Network
Forti Nova maintains a network of trained SprayGrade applicators across the UK. Specifiers and main contractors can request approved applicators for project tender and execution. Training ensures consistent application quality, specification compliance, and warranty validation support.
For Contractors
Become a Forti Nova approved applicator. Training, technical support, and project referral network access.
For Specifiers
Request approved applicators for tender lists. Verified training, technical capability, and warranty compliance support.
Training & Specification Support
Use the contact wizard to request training, join the applicator network, or specify SprayGrade for your project.
Is SprayGrade suitable for your project?
Request a technical assessment to verify system suitability and specification.