Sheets and existing finishes
Identify the metal, previous coating and condition of retained roof sheets.
Explore the detailCommercial & industrial coating contractors
Metal roof waterproofing
Waterproofing for profiled, corrugated and steel commercial roofs. We tackle corrosion, laps and fixings before applying the membrane. Sound sheets stay; failed areas get the repair they need.
Define the work
Find the cause.
Get the preparation right.
Corrosion and fasteners
Define corrosion treatment and fixing repairs; substantial metal loss may require replacement.
Explore the detailLaps and penetrations
Check seams, rooflight kerbs, flashings and penetrations for a continuous waterproofing detail.
Explore the detailRoof-to-gutter continuity
Include the gutter interface and drainage condition in the proposed scope.
Explore the detail
Installation comes first
From roof inspection to installation.
Assess
Review construction, previous repairs, water ingress, drainage and access. Establish what can be retained and what needs repair.
Specify
Agree the prepared substrate, exact membrane, primers, details, installation conditions and inspection requirements.
Prepare & apply
Plan protection and access, complete the specified repairs and preparation, then apply the membrane and detailing.
Inspect & hand over
Agree the inspection record, finished scope, maintenance instructions and project-specific written warranty terms.
Manufacturer relationships
We work directly
with the manufacturers.
We work with Liquid Rubber Europe and Prokol to resolve system and specification questions for your building. We confirm the proposed system, manufacturer involvement and warranty terms before the work is agreed.
Cold-applied
Liquid Rubber SprayGrade
Cold-applied liquid rubber for commercial waterproofing. We match the preparation, detailing and application conditions to the roof and the manufacturer’s instructions.
Explore SprayGrade installationGrade-specific
Prokol Rocathaan HotSpray
Specialist spray-applied waterproofing using a named HotSpray grade. The primer, membrane and finish form a complete specification for the job.
Explore HotSpray installationManufacturer documents and specification checks
Use current manufacturer documents and project-specific advice. Request the relevant safety sheet, full system build-up and any applicable classification evidence before agreeing the work.
A useful quotation
Show us the building.
Tell us the problem.
Access, condition, preparation, repairs, details and the complete membrane system determine the installed cost. Roof area and gutter dimensions need a clear measurement basis.
- Postcode, building use and operating hours
- Roof type or gutter profile, dimensions and photographs
- Leak history, previous repairs and any existing survey
- Target timing, access constraints and tender requirements
Straight answers
Before you commit.
Practical answers for your roof, gutter and proposed installation.
All 40 waterproofing answersCan a profiled metal roof be spray waterproofed?
Suitable metal roofs can be refurbished after the existing finish and defects are assessed. Fixings, corrosion and laps require a defined treatment before the main membrane.
Can the roof and gutters be included in one project?
Yes, the project scope can address both, with appropriate detailing at their interface. The quotation should identify each area and the specification used for it.
Can spray waterproofing treat cut edge corrosion?
The corrosion must be assessed and treated to the project specification. Severe deterioration can require sheet replacement; applying a membrane does not remove that need.
Will roof waterproofing stop condensation inside the building?
Not necessarily. Condensation and rainwater ingress have different causes. Moisture, insulation and ventilation must be considered so the proposed refurbishment addresses the actual problem.
Will a sprayed membrane repair a structurally weak roof?
No. Unsound sheets, decks or supporting elements need assessment and appropriate repair or replacement. Waterproofing must not be presented as restoring lost structural capacity.
Can photographs provide enough information for a firm quotation?
Photographs can support an initial assessment. A firm specification may need inspection, construction records and suitable testing to establish condition and compatibility.
Find the right application
Based in Blackburn, serving Lancashire, Manchester and the North West. Have a commercial project elsewhere in the UK? Send us the location, scope and timing.
Where we work