Polyurethane Roof System
A seamless, fully-adhered liquid polyurethane membrane that continues across field areas, penetrations, curbs and vertical transitions for monolithic roof waterproofing.
Is this the right assembly?
- A seamless, self-flashing membrane is preferred over sheet systems
- The roof has many penetrations, curbs or complex geometry
- The existing deck is sound and can be prepared and primed
- Fully-adhered performance and clean detailing are priorities
These are indicators, not a specification. Suitability is confirmed by a project review.
Substrates
Product families
The assembly, layer by layer
UV and weather protection; reflective options available
Seamless, fully-adhered waterproofing layer
Fabric at seams, penetrations and movement
Selected to match the substrate
Cleaned, sound and dry
Layers shown top (finish) to bottom (substrate). Actual products and build are per specification.
What we assess first
- Deck soundness and structural condition
- Moisture in the existing assembly / insulation
- Existing coatings and their compatibility
- Drainage and ponding behaviour
- Condition of penetrations, curbs and terminations
- Clean to remove dirt, coatings and contaminants per specification
- Confirm the substrate is sound and dry
- Repair defects, cracks and failed details first
- Adhesion testing to confirm primer selection
- Prime with the primer matched to the substrate
- Penetrations and pipe boots
- Drains and scuppers
- Curbs, upstands and parapets
- Movement joints and changes of plane
- Terminations and edge metal
How it goes together
Preparation & repair
Clean the roof, correct defects and treat failed details.
Priming
Apply the primer selected for the substrate and confirm adhesion.
Detailing
Reinforce penetrations, joints and transitions before field work.
Membrane application
Apply the seamless membrane at the specified film build.
Finish coat
Apply the protective / reflective finish coat.
What it delivers
- Seamless and fully adhered, with no laps to fail
- Elastomeric with crack-bridging characteristics
- Details cleanly around complex geometry
- Reflective finish options to reduce heat gain
Where to take care
- Requires a sound, dry, well-prepared substrate
- Weather-dependent application and cure windows
- Persistent ponding may direct selection to other chemistries
- Apply within the temperature and humidity range on the current product data
- Protect freshly applied material from rain, dew and traffic until cured
- Observe recoat windows between layers
- Substrate cleanliness and dryness verified
- Adhesion testing completed and documented
- Wet-film / coverage checks during application
- Details and terminations inspected before finish coat
- Final visual and continuity inspection
Backed when specified & installed correctly
Warranty coverage for this system depends on specifying it appropriately for the conditions, installation by a qualified installer, and a registered project. Coverage terms are defined by the applicable warranty document.
Technical documents
The specification, installation guide and detail drawings for the Polyurethane Roof System are maintained with revision control and available on request.
Request specification Specifications libraryEvaluate this system for your project
Share your substrate and conditions for a confirmed recommendation.