140mm Celcon H+H Standard Grade Plain Face 3.6N Block

Product Overview

140mm Celcon H+H Standard Grade aircrete block, measuring 440mm x 215mm x 140mm, with a plain face and compressive strength of 3.6N/mm². 

Produced from autoclaved aerated concrete (AAC) at a dry density of around 600kg/m³, the block combines lightweight construction with reliable strength, enabling faster build programmes and lower foundation loads without compromising compliance.

The increased 140mm thickness provides greater load-bearing strength, improved thermal efficiency, and enhanced sound insulation compared with 100mm units.

With a thermal conductivity of 0.15 W/m·K, it delivers excellent insulation compared to dense concrete units, helping buildings meet energy standards cost-effectively. Its mass also improves acoustic performance, making it well suited for internal partitions and separating walls.

Non-combustible (Euroclass A1) and frost-resistant, the block is safe for use both above and below DPC. Versatile in application, it can be used in cavity and solid walls, partitions, flanking walls, and beam-and-block flooring across residential, commercial, and multi-storey developments.

Features & Benefits

• 3.6N/mm² compressive strength: Provides certified strength for use in structural and non-structural applications.
• 140mm thickness: Provides increased load-bearing strength along with improved thermal performance compared with 100mm units.
• Lightweight aircrete construction: Reduces manual handling strain and speeds installation.
• Thermal conductivity 0.15 W/m·K: Contributes to compliance with Part L of Building Regulations.
• Sound insulation performance: Additional mass improves airborne sound reduction.
• Non-combustible (Euroclass A1): Will not contribute to fire spread, enhancing building safety.
• Resistant to freeze-thaw: Reliable for external walling and below-DPC applications.
• Standard size 440mm x 215mm x 140mm: Fully compatible with traditional UK brick and block coursing.
• Average dry density ~600kg/m³: Balances lightweight handling with structural stability.

Please Note: Orders requiring a pallet will incur a refundable pallet charge of £20 ex VAT per pallet. Our customer service team will confirm if this applies to your order.

Applications

• Can be used with cavity wall construction: Suitable for both inner and outer leaves in low-rise and multi-storey projects.
• Solid wall construction: Offers strength and thermal performance for single-leaf walling.
• Below-DPC and foundation use: Appropriate for groundworks and substructure walls when specified correctly.
• Internal partitions, separating, and flanking walls: Suitable where enhanced acoustic or structural performance is required.
  
  

Installation Guidance

• Mortar bedding: Suitable for use with traditional sand/cement mortars or thin-joint systems for faster build.
• Cutting and chasing: Easily cut, chased, or drilled using hand saws or power tools, simplifying detailing.
• Finishing: Accepts plaster, render, cladding, or drylining systems, depending on project requirements.
  
  

Compliance & Performance

• Compressive strength 3.6N/mm²: Meets structural requirements for walls in domestic and commercial buildings.
• BS EN 771-4 compliance: Manufactured in accordance with European standards for autoclaved aerated concrete blocks