Overview
A Wedge tile backer board replaces the three-trade build-up of insulation, waterproofing membrane and cement backer board with one lightweight panel. The closed-cell extruded polystyrene (XPS) core does not wick or absorb water; the cement facing gives a rigid, rough key that bonds directly to cementitious tile adhesives, screeds and renders.
Two facing grades are available on the same core. CSC XPS 250 has a calcium silicate cement facing — the premium, fire-retardant grade for floors, heavy-duty tiling and any board that may be left partly exposed. MXPS has a polymer-mortar facing — the economical grade for interior wet-area walls where the board is fully covered by tiles.
Both faces are symmetrical, so there is no wrong way up. Boards are scored and snapped with a trimming knife against a straight edge — no power tools or dust extraction on site.
Download the CSC XPS Boards catalogue (PDF)
Full 2026 technical catalogue — five-layer construction, declared values, CCXP core grade selector, floor, roof and wall build-ups, sizes, packing, installation guide and export data. 13 pages, 7 MB.
Tile Backer Board specifications
Typical production values for the standard 10 mm and 20 mm boards on a CCXP 30–45 core; other cores and thicknesses on request. Values are determined by the test methods listed and are not a specification — request a Material Test Certificate where a value must be guaranteed.
| Property | Value | Test standard / note |
|---|---|---|
| Core | Closed-cell extruded polystyrene (Wedge CCXP), CFC and HCFC free | ASTM C578 / EN 13164 |
| Facing | Calcium silicate cement (CSC XPS 250) or polymer mortar (MXPS) over alkali-resistant fibreglass mesh, both faces | — |
| Thermal conductivity, λ | 0.030 W/m·K (composite); 0.028 W/m·K core at 10 °C | EN 12667:2001 / ASTM C518 |
| Composite panel density | 200–300 kg/m³ | DIN 53420 |
| Core density | 30–40 kg/m³ (CCXP 30 / 35 / 36 / 45) | ASTM D1622 |
| Compressive strength at 10 % | 200–450 kPa depending on core grade | ASTM D1621 / EN 826 |
| Bond strength, tile adhesive to facing | 0.3 N/mm² | BS EN 1348 |
| Shear bond strength | 3.32 kg/cm² | EN 1448 |
| Maximum tile loading | 62 kg/m² | CERAM 121107 |
| Surface strength of coating | ≥ 1 MPa | — |
| Water absorption, long-term immersion | ≤ 0.7 % by volume | ASTM C578 / EN 12087 |
| Water vapour permeability, Sd | 3.2 m | DIN EN 12086 |
| Resistance to body impact | 3 × 120 N/m | ETAG 003 |
| Impact sound reduction, ΔLw | 21 dB (as floor underlay) | BS ISO 140-8 |
| Reaction to fire, composite | Class E | EN 13501-1 |
| Service temperature | −30 °C to +80 °C | — |
| Thickness | 6, 10, 12, 20 mm (up to 100 mm to order) | ±1.0 mm |
| Board sizes | 1200 × 600 mm (0.72 m²); 2440 × 1220 mm (2.98 m²) | ±3 mm |
| Nominal weight | 1.5 kg/m² at 6 mm; 2.5 kg/m² at 10 mm; 5.0 kg/m² at 20 mm | — |
XPS core grade selector
The core grade sets the compressive strength of the finished board; choose it from the load the floor, roof or wall will carry.
| Property | Value | Test standard / note |
|---|---|---|
| CCXP 30 — 200 kPa | Wall tile backer, partitions | — |
| CCXP 35 — 300 kPa | Wall and floor tile backer | — |
| CCXP 36 — 350 kPa | Floor tile backer, underfloor heating | — |
| CCXP 45 — 450 kPa | Floors under screed, heavy tiling | — |
Tile Backer Board price
Tile backer board is priced per board or per m² by thickness, core grade and facing. MXPS (polymer-mortar facing) is the economical interior grade; CSC XPS 250 (calcium silicate cement facing) is the premium fire-retardant grade. Pricing is on application and depends on quantity, thickness and delivery location — send the area and thickness for a firm quotation in ₹ INR and $ USD.
Minimum order is one pallet for supply within India and one 20′ GP container for export (indicatively 2,600 m² at 10 mm or 1,300 m² at 20 mm). Standard 1200 × 600 mm boards ship from stock.
Applications
- Bathroom, shower and wet-room walls — the waterproof substrate behind tiles, replacing tanking membrane plus cement board (6–12 mm, CCXP 30–35).
- Bathroom, shower and wet-room floors — combined insulation and tanking layer beneath tiles (6–10 mm over screed).
- Kitchen backsplashes, counters and vanity units (6–10 mm).
- Swimming-pool, spa and sauna wall linings and bath panels — unaffected by continuous humidity and chlorinated atmospheres (10–20 mm, CCXP 35–36).
- Refurbishment over existing tiles, timber or concrete without raising floor level — from 6 mm.
- Hotel, hospital and residential bathroom pods and prefab washrooms.
Typical build-up — tiled shower wall on masonry
| Property | Value | Test standard / note |
|---|---|---|
| 1. Wall tile + epoxy or polymer grout | Sealant at corners and tray | No separate tanking membrane required |
| 2. Flexible C2 S1 cement adhesive | Applied direct to the cement facing | EN 12004 |
| 3. Wedge tile backer board, 6–12 mm | Joints taped and sealed | Waterproof, insulated, rigid tile substrate |
| 4. Adhesive dabs + 5 anchors/m² | Or full adhesive bed where the wall is flat to 3 mm in 2 m | — |
| 5. Masonry or plastered wall | Sound, dry, primed if porous | — |
Installation
- Prepare the substrate — concrete, screed, masonry or plaster must be sound, clean, dry and flat to 3 mm in 2 m. Prime porous substrates.
- Cut to size — score both faces with a trimming knife against a straight edge and snap. Cut pipe holes with a hole saw.
- Bed in adhesive — apply flexible cementitious tile adhesive (C2 to EN 12004) with a 6–8 mm notched trowel and press the board firmly into the bed.
- Mechanically fix — on timber or steel studs fix through the board with corrosion-resistant screws and 35 mm washers at 300 mm centres; on masonry use adhesive dabs plus five anchors per m².
- Tape and seal — bed 100 mm alkali-resistant mesh tape in adhesive over every joint; apply flexible sealant at internal corners, perimeters and penetrations.
- Tile — tile directly onto the cement face with the same C2 adhesive. Use epoxy or cement-polymer grout in wet areas. Tile and adhesive load ≤ 62 kg/m².
- Do not use solvent-based adhesives or primers on the core, and seal any exposed cut edge in wet areas with adhesive.
Sizes, thickness and packing
Standard formats: 1200 × 600 mm (tile backer small, 0.72 m²) for bathrooms, kitchens and refurbishment; 2440 × 1220 mm (tile backer large, 2.98 m²) for full-height wet-room walls. Cut-to-size up to 3000 × 1200 mm for project and prefab lines.
Product code: CSC-35-10-1200 = calcium silicate cement facing, CCXP 35 core, 10 mm, 1200 mm length (MX prefix for polymer-mortar facing). Boards are stacked flat, face to face, on fumigated (ISPM 15) wooden pallets with corner protectors and stretch-film cover; each pallet is labelled with product code, batch number, quantity and manufacturing date.
Why buy from Wedge Industries Limited
- Manufactured in Faridabad, India, with group sourcing from the United Kingdom, Spain and China; exported to 45+ countries across the Gulf, Europe, South and South East Asia, Africa and North America.
- Every figure published here is a tested value to the standard stated, not an estimate. A Material Test Certificate (MTC) is issued per batch on request, and a TDS, MSDS and Application Guide are available for every grade.
- Standard formats ship from stock; project quantities and cut-to-size boards are produced to order with a typical lead time of three to four weeks ex-works.
- Minimum order: one pallet for domestic supply; one 20′ GP container for export (indicatively 1,300 m² at 20 mm or 520 m² at 50 mm). Mixed-thickness containers accepted.
- Incoterms offered: EXW, FOB, CIF and DAP. HS code 3921.11 (indicative). Export documentation and compliance support through group company ZJELL Limited.
- Ancillaries supplied with the boards: 100 mm alkali-resistant joint tape, corrosion-resistant screws and 35 mm washers, masonry anchors, flexible C2 S1 tile adhesive, polymer-modified base-coat render and sealant.
Frequently asked questions
What is a tile backer board?
A tile backer board is a rigid, waterproof panel fixed to walls or floors as the substrate for tiles. Wedge tile backer boards have a closed-cell XPS foam core with a cement facing on both sides, so one board provides insulation, waterproofing and a tile-ready surface without a separate membrane or cement board.
Is XPS tile backer board waterproof?
Yes. The closed-cell XPS core absorbs 0.7 % or less water by volume in long-term immersion (ASTM C578) and the cement facing seals the surface. With joints taped and perimeters sealed the board itself is the tanking layer in showers and wet rooms.
Which thickness of tile backer board should I use?
Use 6 mm for refurbishment over existing tiles or where floor level cannot rise, 10 to 12 mm for shower and bathroom walls on masonry, and 10 to 20 mm for floors, underfloor heating and pool surrounds. Any thickness from 6 to 100 mm can be supplied.
How much tile weight can the board carry?
Maximum tile loading is 62 kg per square metre tested to CERAM 121107, which covers large-format porcelain and natural stone with adhesive. Adhesive bond to the facing is 0.3 N/mm² to BS EN 1348.
What is the difference between CSC XPS 250 and MXPS tile backer board?
Both use the same Wedge CCXP core. CSC XPS 250 has a calcium silicate cement facing and is the premium, fire-retardant grade for floors, heavy tiling and boards that may be partly exposed. MXPS has a polymer-mortar facing and is the economical grade for interior wet-area walls that are fully tiled.
What is the minimum order and lead time?
Standard 1200 × 600 mm boards ship from stock with a minimum order of one pallet within India. Export orders are a minimum of one 20-foot container, with mixed thicknesses accepted. Project and cut-to-size quantities are produced to order in three to four weeks ex-works.
Need the full data sheet set? Download the CSC XPS Boards catalogue (PDF) or request the TDS, MSDS and Application Guide with your enquiry.
Related products
- Polymer Cement Coated XPS Board (MXPS)
- Calcium Silicate XPS Sandwich Panel (CSC XPS 250)
- Cement XPS Sandwich Panel — floors, walls and prefab
- XPS Roof Insulation Board — cement coated
- Calcium Silicate Boards
- All insulation products
Request a quotation for Tile Backer Board
Send the floor, roof or wall area, required thickness or U-value, load case and delivery location. Wedge Industries Limited returns a grade and thickness recommendation, a board and ancillary schedule and a firm price in INR and USD.
