Gouda, Netherlands · Complete cold applied 2K polyurea system
Executed project
De situatie en het uitgevoerde werk.
Approximately 700 m² of outdated bituminous roofing with strong crackle formation, systematically renovated with primer, reinforced details and two layers of white 2K polyurea.
Ieder dak, iedere vloer en iedere ondergrond is anders. Daarom beoordelen we bij een nieuwe aanvraag altijd opnieuw wat er nodig is.
ObjectSchool building
LocationGouda
SizeApproximately 700 m²
SubstrateExisting bitumen
Damage pictureStrong crackle formation
SystemPrimer, geotextile and 2K polyurea
Project goalPlanned lifespan extension
Interactive Project Evidence
From the initial condition to a verifiable result.
Review the work sequence by phase. Images gain technical value only when their content and project boundaries are clear.
01 / Initial situationPROJECT EVIDENCE
VISUAL COMPARISONBefore / latest available project phase
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POLYSHIELD PROOF TWIN / SCHOOLDAK
See what happens beneath the white final surface.
Based on our own project images
The project images connect the documented condition, execution phases and visible result without filling in missing data.
Circa 700 m²roof area
Bestaand bitumensubstrate
2K-polyureamembrane technology
Zes fasendocumented
01 / Initial conditionDIGITAL PROJECT MODEL
Dit project
A conservation strategy tailored to the remaining building function.
There were no active leaks, but the aging required timely intervention. Because the building is expected to remain functional for another fifteen years, a practical system renovation was opted for rather than complete replacement. The white finish also supports the goal of limiting solar absorption.
De situatie
Waarom het werk nodig was
The existing bituminous roof covering was very outdated and showed a lot of crazing. There were no active leaks, but the roof practically needed to be preserved for the remaining period of use of the school building. In addition, limiting summer heat loads was an important project goal.
Onze aanpak
Zo hebben we het aangepakt
Clean the entire roof surface under high pressure and make it suitable for further treatment
Provide the dry bituminous surface with a quick-drying PU primer
Reinforce transitions, seams and critical connections with 60 gram geotextile
Apply two layers of cold-applied 2K polyurea with a total consumption of approximately 2 kg per m²
Visually check the white, UV-resistant end surface and all connections
Na oplevering
Het resultaat
The outdated bitumen roof has been preserved as a coherent system and provided with a light, seamless and UV-resistant waterproofing. The white finish absorbs less solar heat than the original dark roof, thus supporting the goal of limiting the building's summer heat load.
Decision factors
Waarom deze aanpak technisch logisch was.
A system name alone does not explain project choice. The existing condition, risks, details and feasibility together determine the renovation strategy.
Project decision
Strongly aged bitumen without active leakage
Remaining period of use of the building
Limiting major demolition work
Wish for a light, UV-resistant final layer
Opgenomen werkzaamheden
Complete high-pressure cleaning
Fast drying PU primer
60 gram geotextile on transitions
Two layers of 2K polyurea, total approximately 2 kg/m²
Technically assessed
Stability of the existing bituminous subsurface
Crackle, seams, upstands and penetrations
Dryness before primer and membrane
Connection of system choice to usage horizon
Execution in pictures
Zo is het werk uitgevoerd.
From existing bituminous roofing to a completely white waterproofing system.
Veeg naar rechts voor de volgende werkfase →
Werk in uitvoering
Initial situation
Aged bitumen with extensive crazing, without active leakage.
Werk in uitvoering
Cleaning
The entire roof surface has been thoroughly cleaned under high pressure.
Werk in uitvoering
Primer
The prepared surface is provided with a quick-drying PU primer.
Werk in uitvoering
Armored details
Transitions and critical connections are reinforced with 60 gram geotextile.
Werk in uitvoering
2K membrane
Two layers of cold-applied 2K polyurea form the white UV-resistant waterproofing.
Werk in uitvoering
Final check
Roof surface, curbs, penetrations and details are checked as one system.
Project result
Lifespan extended. Heat load limited.
The light roof finish absorbs less solar heat than the original dark bitumen. The exact influence on the indoor temperature also depends on insulation, ventilation, use and weather conditions.
Practical conservation without complete replacement of the existing roof structure
Seamless waterproofing over surfaces, seams, curbs and penetrations
White UV-resistant finish with lower solar absorption than the dark bitumen
Projectafbakening afgestemd op de resterende gebruiksperiode van het gebouw
Control and delivery
Wat we tijdens dit project hebben gecontroleerd.
Control
Quality moments
Visual inspection after cleaning
Primer continuity before follow-up coat
Complete embedding of geotextiles
Final check of surface, details and elevations
Evidence
Confirmed project information
All six implementation phases were photographically recorded
Area and material consumption are available as project data
System structure is described from cleaning to final inspection
White final finish has been visibly delivered
Border
Project-specific boundaries
No independent indoor temperature measurement has been carried out
Lower solar absorption is not the same as a guaranteed temperature reduction
New projects require moisture, adhesion and detail assessment again
Technical project passport
Systeemvariant, ondergrond, primer, batchgegevens, verbruik, applicatiecondities, ETA/DoP, toepasselijke BROOF-opbouw en onderhoud worden alleen opgenomen wanneer ze per project zijn bevestigd.
From system name to demonstrable project structure.
PSP-RR-001PS-PUA-01Executed and photographically recorded
Complete roof scope
Project
Planned renovation of school roof
Location
Netherlands · location confidential
Size
Approximately 700 m²
Substrate
Existing bituminous roofing
AANLEIDING
Strong crackle formation, residual building function and desire to limit solar absorption.
01
Preparation
Complete high-pressure cleaning
Visual surface check
Fast drying PU primer
02
System construction
60 gram geotextile on transitions
Two layers of cold applied 2K polyurea
Total consumption approximately 2 kg / m²
White UV resistant final finish
03
Checkpoints
Primer continuity
Embedding geotextiles
Roof surface, upstands and penetrations
Photo file of six work phases
Van projectbeeld naar duidelijk bewijs
A project file must show more than just the end result.
PolyShield bouwt projectinformatie op rond zes vaste onderdelen: uitgangssituatie, technische keuze, systeemopbouw, uitvoering, kwaliteitscontrole en oplevering. Zo blijft zichtbaar wat daadwerkelijk is uitgevoerd en welke gegevens per project zijn.
Want to extend the lifespan without immediately replacing the entire roof?
A conservation renovation starts with the question of whether the existing structure is technically suitable. We collect the first project data for that assessment via Roof Intelligence.
01 / Initial situationPROJECT EVIDENCE
