Combo Roof Waterproofing
An integrated roof system combining closed-cell spray PU foam insulation, waterproof protection, geotextile separation, sloped screed and a UV-resistant acrylic finish.
One Coordinated System for Waterproofing, Insulation and Drainage
Our combo roof system creates a continuous insulated waterproofing build-up over the concrete roof slab. Each stage is controlled—from surface preparation and PU foam application through protective coating, testing, geotextile, screed slopes, sealed joints and final acrylic protection.
Combo Roof Waterproofing System with 70 mm PU Foam
The combo roof system delivers seamless thermal insulation and waterproof protection for concrete roofs. Closed-cell spray polyurethane foam follows the roof geometry and forms continuous insulation around parapets, kerbs, outlets, pipes and equipment foundations.
A compatible protective coating safeguards the PU foam before the geotextile separation layer and sloped panelled screed are installed. Screed joints are sealed, junctions are reinforced and the completed roof receives flexible UV-resistant acrylic finishing coats.
Combo Roof Waterproofing Process Gallery
Click any image to view each application stage in full size.
Typical Combo Roof Build-Up
- Prepared reinforced-concrete roof slab
- Closed-cell spray PU foam — 70 mm average thickness
- Compatible rubberised protective waterproof coating
- Water-tightness testing after complete curing
- Geotextile separation and protection layer
- Filler-board panels and positive screed slopes toward outlets
- Protective cement-sand screed
- Backing rod and approved flexible sealant at screed joints
- Angle fillets and reinforced treatment at parapets and upstands
- Flexible UV-resistant acrylic finishing coats
Critical Quality Requirements
PU foam thickness, density and adhesion; coating continuity; geotextile overlaps; screed levels and positive drainage; joint sealing; outlet detailing; reinforced upstands; acrylic coverage and final water-flow performance must comply with the approved project specification, method statement and material manufacturer’s instructions.