Recurring leaks
Water entering at laps, fixings, details, rooflights, gutters or the field membrane.
Commercial roof overlays
Commercial roof overlays.For suitable existing roofs.
Large-scale liquid and spray-applied overlays that retain suitable existing roof fabric, rebuild waterproofing continuity and reduce disruptive strip-up.
The commercial case
An overlay is not a shortcut around diagnosis. It is a designed refurbishment route for a roof whose retained substrate, moisture condition, drainage and details have been proven suitable.
When overlay enters the conversation
An existing roof may be suitable for an overlay.
Aged waterproofing
An existing covering approaching the end of its reliable service window.
Complex penetrations
Plant, kerbs, outlets and interfaces that make wholesale strip-up disruptive.
Operational pressure
Warehousing, production, education or retail space that needs the building kept working.
Overlay systems
Choose the overlay system from the roof condition.
01
Scale + complex profiles
SprayGrade liquid rubber
Two-component water-based spray membrane for suitable large roof areas and asbestos-cement encapsulation. Manufacturer-backed warranty routes may be available on qualifying projects, with the applicable terms confirmed in writing.
02
Rapid specialist application
HotSpray pure polyurea
Highly reactive, solvent-free aromatic pure polyurea for suitable new and refurbishment roofs, delivered with specialist heated plural-component equipment.
03
Details + controlled phasing
MonoSeal hand-applied polyurea
Hand-applied pure-polyurea waterproofing for complex details, transitions and roof zones where spray application is not suitable.
04
Familiar refurbishment route
Reinforced liquid overlay
Hand- or roller-applied reinforced systems where geometry, detailing density, access or project phasing supports a liquid-applied specification.
The overlay decision
Five checks before installation.
01
Prove the substrate
Identify the existing roof, moisture, adhesion, movement and structural constraints.
02
Remove false economy
Separate defects that can be repaired from conditions that make overlay unsuitable.
03
Compare technologies
Test application method, chemistry, detailing, programme, weather and access against the project.
04
Design every interface
Build laps, fixings, kerbs, outlets, rooflights, edges and gutters into the scope.
05
Install + record
Control preparation, weather, membrane build, inspection and handover evidence.
Warehousing
Manufacturing
Schools
Retail + FM
Clear answers
Commercial roof overlay questions
Suitability, technology selection, asbestos and occupied-building delivery
Commercial overlay assessment