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Roof
Problem Areas

  • Cold-applied liquid waterproofing for industrial roofs, gutters, and details
  • Seal leaks and protect flashings, upstands, and penetrations
  • No hot work or tear-off
The Challenge

Industrial roofs leak at the details — laps, flashings, upstands, gutters, and penetrations — long before the whole roof needs replacing. Water ingress damages stock, equipment, and structure, and a full tear-off and re-roof is a major capital cost and disruption. Hot-melt and torch-applied systems bring fire risk onto a live facility.

A Real Rumford Example
Packing area roof leaking at seams and fastener rows Before
The Problem
Leaking Packing-Area Roof

Water was getting in through failed lap seams and fastener rows, with the roof coating degraded and product below at risk.

Water ingress · Failed lap seams · Degraded coating & fasteners

Hover for the Belzona result →
Waterproofed with Belzona 3111 (Flexible Membrane), brush-applied over seams and fasteners After — Belzona
The Solution
Waterproofed With Belzona 3111

A flexible membrane brush-applied over seams, fasteners, and details forms one seamless waterproof layer — cold applied, no tear-off or hot work.

Leaks sealed · Seamless flexible membrane · Reinforced seams & details

Cold applied · no hot work, no tear-off

Read the full case history →

Outcomes vary by component, load, and access — contact Rumford Industrial Group for a project-specific assessment.

Flat and profiled metal roofs, gutters, roof lights, flashings, upstands, and penetrations are where roofs typically fail. Corroded seams, split laps, and degraded sealant let water in, and traditional over-roofing or replacement is expensive and slow.

Belzona cold-applied liquid waterproofing systems seal and protect roofs and their vulnerable details without hot work, seams, or a tear-off. Fully bonded and reinforced where needed, they conform to complex shapes and extend roof life for years. Rumford Industrial Group applies them across five states.

Belzona Solutions for This Application
Roof Waterproofing & Weatherproof Coatings
Lightweight, liquid-applied roof coatings offering long-term waterproofing and weatherproofing, applied by brush or roller with reinforcement sheet for thickness control and elasticity to accommodate roof movement.
Metal Roof & Lead Flashing Repair
Sealing cut edges of profiled steel sheets against corrosion, fast-curing epoxy repair of damaged lead flashings, and polymeric membrane encapsulation or replacement of lead roofing to prevent theft.
Joint, Seam & Emergency Leak Repair
Instant sealing of leaks, damaged expansion joints, and seams (curing even underwater), plus repair and sealing of corroded skylights and glazing bars.
Parapet Wall & Masonry Repair
Repair of damaged and leaking parapet walls and copings, repointing of brick or mortar, and sealing/repairing cracks in masonry walls, usable even in adverse weather conditions.

Specific Belzona product recommendations available on request — contact Rumford Industrial Group for a free technical consultation.

What Belzona Can Do for Roofs
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Repair and seal joints and seams
Bridge and waterproof split laps, expansion joints, and seams with a flexible, fully bonded system that accommodates movement.
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Rebuild and seal roof edges
Reinstate corroded or damaged roof edges and cut sheet edges, then seal them against further water and corrosion.
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Seal waterproof glazing sections
Seal leaking skylight and glazing sections in place, without removing or replacing the glazing units.
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Rebuild and waterproof glazing bars
Rebuild corroded glazing bars back to profile and encapsulate them in a weatherproof membrane.
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Rebond loose glazing sections
Re-adhere loose or slipped glazing panels with a resilient structural adhesive that also seals the joint.
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Waterproof gutters and standing water areas
Line gutters, valleys, and ponding areas with a seamless membrane that tolerates permanent standing water.
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Rebuild and seal gutters, fall pipes and supports
Rebuild holed gutters, fall pipes, and corroded supports, then seal them to restore drainage.
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Seal and waterproof flashings
Seal and reinforce metal and lead flashings, upstands, and abutments where most roof leaks begin.
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Repair and restore stonework
Rebuild spalled and eroded stonework and repoint brick or mortar to match the surrounding profile.
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Seal leaking areas in parapet walls and copings
Seal cracks and leak paths through parapet walls and copings, workable even in adverse weather.
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Repair damaged or loose parapet walls or copings
Rebond loose copings and rebuild damaged parapet masonry to restore a weathertight roof perimeter.
See it on our interactive Solution Maps

See how roofs, gutters, and building envelopes are protected in Belzona's interactive maps.