Roof Thermal Insulation Waterproof Board

Roof thermal insulation waterproof board is a multi‑functional integrated composite roof substrate, developed for flat roofs, sloped roofs, light‑steel structural roofs and roof renovation projects. It combines thermal insulation, moisture barrier, substrate levelling and deformation‑resistant protection within one single panel, transforming the conventional complicated practice of stacking separate insulation, separation and levelling layers. It adopts five‑layer laminated monolithic structure: symmetric polymer‑quartz protective facings and alkali‑resistant high‑strength fibre meshes on both sides, with high‑density XPS extruded polystyrene as central core. Under high‑temperature high‑pressure hot‑press manufacturing, fibre meshes interlock mechanically between core and quartz coating interfaces to prevent inter‑layer delamination. Outer polymer‑quartz coating forms a dense protective shell against rain erosion and indirect UV impact, meanwhile offering high‑adhesion base for roof tiles or finishing mortar. Closed‑cell XPS core blocks heat transfer and vapour penetration. This coordinated structure addresses common roof failures such as insulation performance loss caused by water absorption and waterproof membrane tearing triggered by substrate cracks

For material and specifications, thermal core is high‑density closed‑cell XPS extruded polystyrene with minimal capillary water absorption. Dual‑side reinforcement layers adopt alkali‑resistant fibreglass mesh together with mineral‑modified polymer‑quartz coating. Free of asbestos and formaldehyde, its VOC emission complies with international green‑building standards. Multiple thickness grades match diverse roof conditions： 30‑40 mm for regular residential flat and sloped roofs; 40‑50 mm for buildings located in tropical or frigid zones demanding superior thermal performance. Custom thicker panels are available for large factories and steel‑structure buildings. Standard panel dimension is 1220 × 2440 mm, pre‑cut special‑shape pieces for ridges, eaves and drain openings are supported. Optimized areal density delivers much lighter weight versus cement‑based roof substrates, imposing little extra dead‑load to roof trusses and purlins. On‑site cutting generates minimal dust with ordinary hand‑tools.

Typical applications include new residential roofs, aged‑roof retrofits, light‑steel sloped roofs, factory flat roofs and terrace decks. For flat roofs, panels are laid directly over sloped concrete deck. Joints are sealed with special sealant and fibre tape, ready for asphalt membranes, roof tiles or finishing mortar. For sloped roofs, panels are fastened onto steel or timber purlins, with asphalt shingles, resin tiles or glazed metal tiles installed above. It can also serve as base cushion for roof terraces and extensive green roofs. Project example: In tropical coastal Southeast‑Asia residential retrofits, heavy monsoon rainfall, strong UV and large day‑night temperature swings frequently cause waterlogged insulation and recurrent waterproof cracking. 40 mm roof thermal‑insulation waterproof boards replaced separately‑laid insulation and separation layers, cutting three construction steps. Peak indoor temperature on top floors decreased, roof‑leak repair frequency dropped significantly and overall roof‑system service life was extended

Applications cover residential flat and sloped roofs, prefabricated light‑steel building roofs, full retrofits of aged buildings, commercial terraces and small‑to‑medium factory rooftops. For sloped timber‑purlin roofs, panels are anchored onto purlins with staggered joint layout, sealed before tile installation. On sloped concrete decks with pre‑made drainage fall, staggered sealed panels serve as stable substrate for asphalt waterproof membranes. During old‑building renovation, full demolition of old roof substrate is sometimes unnecessary. Panels can be laid over existing structure after load‑bearing assessment, cutting construction waste and demolition duration. Project example： A townhouse‑renovation project in Mediterranean Southern Europe involved roof renewal for dozens of ageing dwellings. Original insulation degraded and melting snow triggered seasonal water ingress. 35 mm roof thermal‑insulation waterproof boards were anchored directly on existing timber purlins without separate separation membranes, with clay tiles installed after joint sealing. Post‑renovation roof‑leak complaints dropped sharply. Top‑floor heating and cooling energy consumption decreased notably. Construction waste removal volume fell by nearly 35 % compared with conventional renovation approaches