Roof & corrosion
Repair and protect metal roofs
Targeted treatment of corrosion, overlaps, attachments, gutters and vulnerable details without unnecessarily replacing a technically suitable roof structure.
PolyShield performs this
Corrosion repair and metal protection
Protect metal roofs, facades and steel before material loss leads to replacement.
- 01Inspect corrosion, salts and existing coating
- 02Clean and mechanically prepare
- 03Perform primer and detail repair
- 04Check protective layers and dry layer thickness
From damage picture to solution
Problem, cause and effect first visible.
- Weather and industrial loads
- Cutting edges, fasteners and overlaps
- Insufficient preparation for previous maintenance
Corrosion can affect sheet thickness, connections and water tightness.
Corrosion control, project-specific preparation and a registered protective layer build-up.
Business benefits
The value is not just in the new layer.
Material conservation
Retain technically usable plates and steel parts for longer.
Scale
Large profiled surfaces where responsible airless treatment.
Waterproofing
Include seams, gutters and fasteners as critical zones.
Control
Visibly document preparation and layer thickness.
RISK OF DELAY
Surface corrosion can progress to material loss, leaking details and expensive panel or structural replacement.
First have the size, cause, accessibility and desired planning assessed. We then compare repair, renovation and, where necessary, replacement without selling a standard solution in advance.
Have project assessed →SUITABLE FOR
Business applications with a clear technical question.
- Production halls
- Sheds and warehouses
- Metal siding
System approach
Inspect corrosion and existing layers
Clean and mechanically prepare
Detailing seams, fastenings and gutters
Apply elastic and UV-resistant system
Application boundaries
Assess first.
Only then specify.
- Assess residual wall thickness and structural damage
- Remove salts and contamination
- First test adhesion to existing layers
Control profile
The division is broader than the application.
PolyShield assesses preparation, implementation and delivery as one coherent technical scope.
- 01Corrosion class and salts
- 02Pretreatment degree
- 03Layer thickness and climate
Can be processed quickly where responsible
Less downtime starts with the right system choice.
Where technically appropriate, PolyShield works with fast-reacting primers, two-component membranes and fast protective layers. The benefit lies not only in curing, but in a work plan in which preparation, recoating times and recommissioning are aligned in advance.
- 01
Fast-drying primers and 2K protective layers where climate and preparation suit
- 02
Treat details and corrosion zones before the large surfaces
- 03
Use overlay areas without contamination or condensation between layers
Technical roof coating
Corrosion, seams and movement determine the renovation route.
Metal roof panels respond to temperature, while overlaps, fasteners, cut edges and gutters can each have a different damage pattern. An elastic main layer without a corrosion and detail plan therefore does not provide sufficient certainty.
We assess metal type, residual wall thickness, salts, existing coating and achievable pre-treatment. This is followed by a suitable primer, targeted detail sealing and a waterproof, weather-resistant protective layer.
Business scenarios
Where this route can add value.
Profile plates
Treat overlaps, fasteners, and cut edges as separate detail areas.
Metal gutters
Assess water load, deformation, seams and local corrosion together.
Existing coatings
Identify, clean and check adhesion and compatibility on a test surface.
Industrial environment
Include salts, corrosiveness category and feasible pre-treatment in the layer build-up.
Renovate or intervene first?
Three outcomes after the first roof assessment.
Liquid renovation
The roof structure is stable, sufficiently dry and the details can be technically repaired. Trial adhesion and system selection can follow.
Restore locally first
Bad areas, seams, drains or details are replaced or repaired before a coherent membrane layer is applied.
Further investigation or replacement
Wet insulation, large-scale detachment, structural damage or irreparable details make direct coating irresponsible.
Proof before promise
What should be visible in a commercial roof quotation.
- 01Existing roof structure and assessed zones
- 02Preparation, repairs and primer route
- 03Detailed approach for edges, drains and penetrations
- 04Membrane variant, consumption and layer structure
- 05Working window, weather limits and phasing
- 06Photo, material and delivery registration
Relevant premium technology
Cold applied 2K polyurea as a complete system direction.
An elastic 2K polyurea membrane can be assessed for this application. Suitability does not follow from the product name, but from the substrate, primer, details, load and the demonstrable system variant.
View applications and system structure →Project information
Substrate, surface, details, known damage, load, accessibility and desired planning.
System direction
Primer, repair, main coat, detailing, anti-slip or finish are chosen as a coherent structure.
Checkpoints
Conditions, consumption, layer structure, photos and project-specific residual and maintenance points.
Applications within this division
Explore the project question.
Related expertise
Applicable to technology, evidence and decision-making.
These next steps are linked to application, substrate, risk and decision phase. This way you navigate from general information to technology, evidence and a useful project route.
Application
Metalen bedrijfsdak Rotterdam
Corrosie, naden en coating als één renovatiescope.
View this route →ToolPolyShield System Configurator
Translate building part, subsurface, priority and planning into a transparent first system direction.
View this route →Target groupContractors and construction partners
Specialist scope with clear demarcation, interfaces and delivery.
View this route →TechnologyCentral guide cold applied 2K polyurea
From target group and four-layer system structure to comparison, boundaries, project evidence and business next step.
View this route →TechnologyMetal and corrosion protection
Coatings and primers for steel, sheet metal, gutters and industrial constructions.
View this route →ApplicationRepairing metal commercial roofs
Treat overlapping, fastenings, corrosion and gutters as one renovation scope.
View this route →