12mm RCM Y Wall Calcium Silicate Board 2400mm x 1200mm
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Fibre-reinforced calcium silicate board for external sheathing. Offers weather, fire, and impact resistance. Suitable for ventilated facades, steel frame systems, and offsite modular construction.
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Wed 26 Nov
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Product Overview
Fibre-reinforced calcium silicate board for external sheathing. Offers weather, fire, and impact resistance. Suitable for ventilated facades, steel frame systems, and offsite modular construction.
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, EH, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, SA, SY & TD
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £20 ex. VAT |
| Over £100 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{home}} Suitable for external sheathing in ventilated wall systems
- {{device_thermostat}} Low thermal conductivity
- {{fitness_center}} Maintains flatness and integrity under changes in temperature
- {{shield}} Reduces risk of cracking or joint stress
Technical Specification
| Thickness: | 12mm |
|---|---|
| Width: | 1200mm |
| Length: | 2400mm |
| Pieces Per Pallet: | 32 |
| Sales Unit: | Sheet |
| Sales Unit Coverage: | 2.88m2 |
| Brand: | RCM |
Technical Downloads
Product Overview
RCM Y-Wall Calcium Silicate Board measuring 2400mm x 1200mm x 12mm is a high-performance, non-combustible sheathing board designed for use behind façade systems, rainscreens, and cladding.
Manufactured from calcium silicate reinforced with selected fibres, it provides a dimensionally stable substrate with excellent fire resistance and structural rigidity.
The board is suitable for both steel and timber frame applications, forming a robust external sheathing layer that maintains integrity under high temperature and moisture variations. Its smooth, dense surface resists delamination, impact, and weather exposure during construction, ensuring long-term performance.
RCM Y-Wall is engineered for use as part of ventilated façade systems and has been independently tested to meet fire and durability standards. The 12mm thickness provides enhanced stiffness and strength, making it suitable for medium to high-rise projects where wind loading and mechanical fixing demands are greater.
Features & Benefits
- High-density calcium silicate composition: Provides excellent dimensional stability, durability, and structural rigidity under varying conditions.
- Non-combustible performance: Classified to A1 under BS EN 13501-1, ensuring full compliance for use in façade and fire-rated systems.
- Moisture and weather resistant: Maintains strength and flatness when exposed to moisture or changing site conditions during installation.
- Versatile sheathing use: Suitable for both steel and timber frame construction behind cladding or rainscreen façades.
- Smooth surface finish: Accepts coatings, membranes, or insulation systems without surface preparation.
- Impact and edge strength: Resists damage during handling, fixing, and service life for reliable façade performance.
- Low movement characteristics: Reduces risk of cracking or joint stress under thermal or humidity variation.
- Board size 2400mm x 1200mm x 12mm: Provides optimal coverage with fewer joints, improving façade continuity.
Applications
- External sheathing: Forms a stable backing layer behind rainscreen cladding or ventilated façades.
- Timber and steel frame walls: Provides a fire-resistant substrate for structural framing systems.
- High-rise and commercial buildings: Used in applications requiring non-combustible external wall linings.
- Modular and offsite construction: Ideal for factory-assembled wall panels due to dimensional accuracy.
- Internal fire protection: Can be used where internal partitions require Class A1 fire-rated performance.
Installation Guidance
- Fixing: Secure using corrosion-resistant screws suitable for calcium silicate boards, following manufacturer spacing guidelines.
- Support framing: Ensure adequate structural support with framing centres designed to prevent board deflection.
- Joint treatment: Leave appropriate expansion gaps and seal joints according to system design or façade specification.
- Handling: Lift and store flat on level supports to avoid edge chipping and surface stress.
- Cutting: Use a fine-toothed saw or power tool with dust extraction; always wear appropriate PPE.
- Weather protection: Protect installed boards prior to cladding installation to maintain dry conditions.
Compliance & Performance
- Material specification: Autoclaved calcium silicate reinforced with mineral fibres and fillers.
- Fire classification: A1 non-combustible under BS EN 13501-1.
- Moisture resistance: Suitable for external sheathing in ventilated wall systems; not intended as a weatherproof finish.
- Thermal performance: Low thermal conductivity contributes to energy-efficient wall systems.
- Dimensional stability: Maintains flatness and integrity under changes in temperature and humidity.
- Important note: Install in accordance with RCM guidelines and façade manufacturer specifications to ensure full compliance with building regulations.
