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Waterproof XPS tile backer board, also named shower backer board, wet room tile substrate board, is a modern upgraded building substrate material specially manufactured for tile installation in damp and wet spaces. The panel adopts three-layer composite structure: high-density closed-cell XPS extruded polystyrene inner core + double-sided alkali-resistant fiberglass mesh + waterproof polymer modified cement coating. The tight combination of all layers delivers strong structural integrity. It replaces traditional cement backer board, gypsum board and ordinary foam board, acting as a reliable base layer before tile sticking.
The product balances waterproof performance, thermal insulation, structural rigidity and construction simplicity. It is widely accepted by tile installers, renovation contractors, building material wholesalers and home DIY users across North America, Europe, Australia. All panels keep stable physical performance under long-term water immersion and high humidity, avoiding most common tiling failure issues.
| Item | Detailed Parameters |
|---|---|
| Standard Full Panel Size | 1220mm × 2440mm (4ft × 8ft) |
| Regular Thickness In Stock | 6mm, 10mm, 12mm, 20mm |
| Custom Service | Custom length, width, thickness acceptable for bulk orders |
| Panel Surface | Matte waterproof coated, both sides usable |
| Density | High density customized for wall/floor use separately |
XPS Closed-Cell Foam CoreClosed-cell extruded polystyrene forms thousands of tiny sealed bubbles inside the board. The compact cell structure completely blocks water infiltration, eliminates water absorption, and brings inherent heat insulation and cold resistance. High compression resistance prevents the board from sinking under tile gravity.
Double-Sided Alkali-Resistant Fiberglass MeshGlass fiber mesh is pressed tightly into board surfaces on front and back sides. It resists alkali corrosion from tile adhesive and mortar. The mesh disperses surface stress effectively, preventing surface cracking during cutting, nailing and long-term temperature changes. It locks the coating firmly with the foam core to prevent layer separation.
Waterproof Modified Polymer CoatingSpecial cement-based polymer paint covers the fiberglass mesh. The coating is hard, wear-resistant, waterproof and vapor-proof. It has great bonding compatibility with cement mortar, thin-set tile adhesive, latex glue, ensuring tiles adhere tightly without hollowing. The coated surface repels moisture and stops mold growth.
Size Specifications
Closed-cell XPS core has near-zero water absorption rate. Even soaked in shower water, pool water for years, the board will never absorb water, swell, warp or deform. No moisture penetrates through the board to inner walls. The waterproof coating inhibits mildew, fungus and bacterial reproduction, solving damp wall, black mold, peeling paint troubles of bathrooms and wet areas fundamentally.
The XPS core has excellent thermal conductivity. Installing this backer board on shower walls and bathroom floors reduces indoor cold air penetration in winter and hot air entry in summer, lowering heating and air conditioning bills. Meanwhile, the foam layer absorbs running water noise, wall impact noise and footsteps, reducing indoor noise interference and improving living comfort.
It is 60%~70% lighter than traditional cement backer board of the same size. Workers finish transportation and wall mounting with less physical effort, reducing onsite labor fatigue. Despite light weight, fiberglass reinforcement guarantees solid hardness. The board withstands daily collision, nail fixing and tile load; no fracture or breakage during normal construction and long-time use.
Tools needed only: utility knife, jigsaw, regular hammer and screws; no special professional equipment required
No water soaking, no pre-sealing, no complicated primer treatment before tiling
Supports cutting into custom shapes for shower niches, pipe openings, curved walls
Compatible with all mainstream tile adhesives, thin-set mortars, cement glues on the market
Can be fixed on wood studs, metal frames, cement walls, brick walls, plywood substrates
Fast construction shortens overall renovation cycles and cuts total labor expenses for contractors and decoration companies.
Whole bathroom walls & floors, shower stalls, shower niches, bathtubs, toilet zones, kitchen backsplash, laundry room walls and floors, basement wet walls.
Swimming pool surrounding walls, spa rooms, hot tub areas, steam saunas, jacuzzi peripheral tiling base.
Closed balcony, open courtyard wall, outdoor terrace, exterior damp facade for tile paving.
Hotel guest bathrooms, apartment renovation projects, gym shower rooms, restaurant public restrooms, school washrooms, shopping mall toilet areas, public bathhouses.
Size Customization: Custom length, width and thickness (6mm/10mm/12mm/20mm and other custom thickness) according to construction drawings, local construction standards and on-site installation requirements. Standard size 1220*2440mm can be cut into special sizes for shower niches, pipe surroundings and special-shaped walls.
Performance Customization: Adjust XPS core density, fiberglass mesh toughness and surface waterproof coating formula. We strengthen anti-pressure performance for floor tiling boards and improve flexibility for curved wall substrates, to match special waterproof, anti-cracking and load-bearing needs of swimming pools, saunas and outdoor wet areas.
Surface Coating Customization: Optional regular waterproof coating, enhanced hydrophobic coating and high-adhesion surface coating. Customize surface friction to fit different tile adhesives; customized anti-mold formula for long-term high-humidity scenarios.
OEM Service: Support private brand logo printing, outer carton & pallet packaging customization, bulk order parameter adjustment and formula optimization. Fully cater to building material distributors, renovation contractors, hotel engineering suppliers and bathroom wholesalers for long-term wholesale cooperation.
A: Our backer board adopts closed-cell XPS foam core with nearly zero water absorption rate. The compact closed bubble structure stops water infiltration thoroughly. Cement boards have open pores that soak up moisture easily, resulting in swelling and mildew. Our double-sided waterproof coating further blocks water vapor penetration for long-term damp use.
A: Standard full panel size is 1220mm×2440mm. Regular stocked thickness includes 6mm, 10mm, 12mm, 20mm. All length, width and thickness can be tailor-made according to construction plans. We also support customized density for wall use and floor use separately.
A: Absolutely DIY-friendly. You only need a utility knife, jigsaw, screws and waterproof tape for installation. No water soaking, primer brushing or complicated pre-treatment is needed. The lightweight panel can be freely cut for shower niches, pipe holes and special curved walls, compatible with all common tile adhesives.
A: The XPS substrate features outstanding dimensional stability. It resists thermal expansion, cold contraction and moisture expansion. The board size remains consistent through hot summers, cold winters and humid weather. Stable substrate effectively avoids tile hollowing, cracking and falling caused by base deformation.
A: It fits all damp tiling areas. Indoor scenarios cover bathrooms, shower rooms, bathtubs, kitchens, laundry rooms and basement walls. It also works for swimming pool surrounds, spas, hot tubs, balconies, courtyard walls, hotel restrooms and commercial gym shower zones.
A: We offer online technical guidance and installation tutorials. For large projects, on-site installation consultation is negotiable. We supply full test reports, waterproof inspection certificates and complete export customs documents. OEM packaging and logo printing are supported, with 1-year warranty against factory production defects.
