H+H UK LTD

CELCON HOUSE
IGHTHAM
SEVENOAKS
KENT TN15 9HZ

Tel: 01732 886444
Fax: 01732 887013

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Suppliers of: Celcon concrete blocks lightweight concrete blocks concrete thin joint system

H+H UK LTD manufacture a wide range of Concrete Blocks and lightweight Concrete Blocks to suite all types on Block Construction.

Useful Resources:

  • BIM files available on BPi
  • H+H Academy: Online training and resources Click here

H+H is the UK’s largest manufacturer of aircrete products. We manufacture the market leading range of Celcon Blocks, including Foundation Blocks, Plus Blocks and the H+H range of aircrete products.

H+H aircrete products offer a complete building material that meets the requirements of the Building Regulations, with the flexibility to offer solutions to hospitals, schools, offices, industrial warehouses and housing (social and private).

Used in partition, separating and external walls (solid or cavity), firewalls and as an infill to framed construction, our products provide durability and fire resistance as well as superb thermal and sound insulation.

Main Product Ranges:

Celcon Blocks

Celcon Blocks in Solar, Standard, High Strength and Super Strength Grades are the most commonly used aircrete block in the H+H range. All Celcon Blocks are BBA certified, are fire resistant (100mm walls, up to 4 hours, 2 hours if loadbearing) and have been classified 0 surface spread of flame and non-combustible to Class A1 (the highest class).

Celcon Block Solar Grade

Celcon Blocks Solar Grade is principally used where enhanced thermal performance is required. With superior thermal conductivity Solar Grade Celcon Blocks are suitably loadbearing for two storey buildings and can be used below DPC.

Celcon Block Standard Grade

Celcon Blocks Standard Grade is BBA certified and has a compressive strength of 3.6N/mm2. Due to its all round performance, it is possible for a 100mm Standard grade Celcon Block to be used throughout a build, eliminating on-site confusion.

Celcon Block High Strength & Super Strength Grade

H+H’s Celcon Blocks High Strength Grade (7.3N/mm2) and Super Strength Grade (8.7N/mm2) are used principally where higher compressive strengths are required such as in the foundations and lower storeys of three storey buildings, piers under high vertical loads and in multi-storey buildings.

Celcon Plus Blocks

Celcon Plus Blocks are an alternative to the 440 x 215mm face format block and are suitable for the same applications.  They are longer at 630mm long and come in a variety of thicknesses.

Celcon Foundation Blocks

Available in Standard Grade (3.6N/mm²) and High Strength Grade (7.3N/mm²), Foundation Blocks can be used to support 3 storey constructions.  They are suitable for the support of solid or cavity walls, framed construction or suspended floors, including beam and block.

Jumbo Bloks

Jumbo Bloks are produced with the latest technology, offering a high degree of dimensional accuracy with sharp arises, which make them ideal for use with Celfix mortar.

Celcon Block Coursing Units

Coursing Units are produced from the same material as all H+H aircrete and are suitable for the same applications as conventional size Celcon Blocks, allowing consistency within the building fabric.

Celfix Mortar

Celfix Mortar is cement based and supplied as a dry, pre-mixed powder in 25kg bags. It has been designed to replace the traditional sand:cement mortar and is used with building with our Thin-Joint System. Celfix Mortar starts to set within 10 minutes of application and approaches full design strength in just 1 to 2 hours.

BLOCKS AGREMENT CERTIFICATE HOLDERS BS EN 771
BLOCKS Aircrete .See Also BLOCKS: Lightweight Aerated Concrete:
BLOCKS Approved Document L / Part L
BLOCKS BRE BES 6001 Responsible Sourcing (RSM) Rating Excellent
BLOCKS BS 14001
BLOCKS BS 5051 Class G2 (Ballistics)
BLOCKS BS 5628:Part 1 Special Category
BLOCKS BS EN 1996-1,2,3
BLOCKS BS EN 771
BLOCKS Cellular Concrete AGREMENT CERTIFICATE HOLDERS
BLOCKS Cellular Concrete BS 5628 Part 1
BLOCKS Concrete
BLOCKS Concrete Beam and Block Flooring Infill
BLOCKS Concrete BS 5628 Part 1
BLOCKS Concrete by Sizes (Metric) Actual: 215mm x 65mm
BLOCKS Concrete by Sizes (Metric) Actual: 300mm x 215mm
BLOCKS Concrete by Sizes (Metric) Actual: 325mm x 215mm
BLOCKS Concrete by Sizes (Metric) Actual: 440mm x 215mm
BLOCKS Concrete by Sizes (Metric) Actual: 630mm x 140mm
BLOCKS Concrete by Sizes (Metric) Actual: 630mm x 215mm
BLOCKS Concrete by Sizes (Metric) Actual: 630mm x 250mm
BLOCKS Concrete by Sizes (Metric) Actual: 630mm x 350mm
BLOCKS Concrete by Thickness (Metric): 75mm
BLOCKS Concrete by Thickness (Metric): 100mm
BLOCKS Concrete by Thickness (Metric): 140mm
BLOCKS Concrete by Thickness (Metric): 150mm
BLOCKS Concrete by Thickness (Metric): 200mm
BLOCKS Concrete by Thickness (Metric): 215mm
BLOCKS Concrete by Thickness (Metric): 255mm
BLOCKS Concrete by Thickness (Metric): 275mm
BLOCKS Concrete by Thickness (Metric): 300mm
BLOCKS Concrete by Thickness (Metric): 325mm
BLOCKS Concrete by Thickness (Metric): 355mm
BLOCKS Concrete Fire Resistant BS 476
BLOCKS Concrete Fire Resistant BS 476 1 Hour
BLOCKS Concrete Fire Resistant BS 476 2 Hour
BLOCKS Concrete Fire Resistant BS 476 4 Hour
BLOCKS Concrete Fire Resistant BS 476 6 Hour
BLOCKS Concrete Fire Resistant BS 5628 1 Hour Loadbearing
BLOCKS Concrete Fire Resistant BS 5628 2 Hour Loadbearing
BLOCKS Concrete Fire Resistant BS 5628 4 Hour Loadbearing
BLOCKS Concrete Fire Resistant BS 5628 6 Hour Loadbearing
BLOCKS Concrete Fire Resistant BS 5628 Class 1
BLOCKS Concrete Fire Resistant BS EN 13501 Class A1
BLOCKS Concrete Fire Resistant ENV1996-1-2-:1995
BLOCKS Concrete Non-Combustible
BLOCKS Concrete Party Walls
BLOCKS Concrete Party Walls Sound Insulation
BLOCKS Concrete Thin Layer Joint Systems AGREMENT CERTIFICATE HOLDERS
BLOCKS Concrete Thin Layer Joint Systems Masonry
BLOCKS Coursing
BLOCKS Coursing Brick Format Units
BLOCKS Featherweight BS EN 771-4
BLOCKS Flooring
BLOCKS Foundation
BLOCKS Foundation AGREMENT CERTIFICATE HOLDERS
BLOCKS Foundation Lightweight Aerated Concrete
BLOCKS Frost Resistant
BLOCKS High Strength
BLOCKS Lightweight Aerated Concrete
BLOCKS Lightweight Aerated Concrete Acoustic Performance Robust Detail
BLOCKS Lightweight Aerated Concrete AGREMENT CERTIFICATE HOLDERS
BLOCKS Lightweight Aerated Concrete Approved Document E
BLOCKS Lightweight Aerated Concrete Beam and Block Flooring Infill
BLOCKS Lightweight Aerated Concrete Below DPC
BLOCKS Lightweight Aerated Concrete BRE Green Guide A+ Rating
BLOCKS Lightweight Aerated Concrete Brick Coursing Size
BLOCKS Lightweight Aerated Concrete BS EN 771-4 (BS 6073)
BLOCKS Lightweight Aerated Concrete BS EN 771-4 CE Marked
BLOCKS Lightweight Aerated Concrete Cavity Wall
BLOCKS Lightweight Aerated Concrete Fire Resistant Class A1
BLOCKS Lightweight Aerated Concrete High Strength
BLOCKS Lightweight Aerated Concrete Infill
BLOCKS Lightweight Aerated Concrete Inner Leaf
BLOCKS Lightweight Aerated Concrete Insulating
BLOCKS Lightweight Aerated Concrete Internal Facing
BLOCKS Lightweight Aerated Concrete Large Format
BLOCKS Lightweight Aerated Concrete Partition
BLOCKS Lightweight Aerated Concrete Solar Grade
BLOCKS Lightweight Aerated Concrete Thin Joint Systems / AGREMENT CERTIFICATE HOLDERS
BLOCKS Lightweight Aerated Concrete Thin Joint Systems / Thin Layer Joint Masonry
BLOCKS Lightweight Aerated Concrete Thin Layer Joint Masonry
BLOCKS Lightweight Concrete:
BLOCKS Lightweight Concrete: BS 5628
BLOCKS Lightweight Concrete: BS EN 771-4
BLOCKS Plain Finish
BLOCKS Sound Insulation
BLOCKS Sulfate Resistance Sulfate Classes up to Class 4
BLOCKS Thermal Insulation
BLOCKS Thermal Insulation AGREMENT CERTIFICATE HOLDERS
BLOCKS Thermal Insulation Anti-Cold Bridging
BLOCKS Thermal Insulation Below DPC
BLOCKS Thermal Insulation Lightweight High Strength
BLOCKS Thermal Insulation NHBC Requirements
BLOCKS Thermal Insulation Specialist Application Higher Thermal Conductivity
BLOCKS Thermal Insulation Thermal Bridging Solutions
BLOCKS by Strength K values (3pc Moisture Content) 2.8 N per Square mm less than 0.15 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 3.5 N per Square mm less than 0.15 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 3.5 N per Square mm more than 0.14 AND less than 0.26 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 4.0 N per Square mm more than 0.14 AND less than 0.26 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 7.0 N per Square mm more than 0.14 AND less than 0.26 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 8.7 N per Square mm more than 0.14 AND less than 0.26 W/M.C
BLOCKS by Strength K values (3pc Moisture Content) 10.0 N per Square mm more than 0.14 AND less than 0.26 W/M.C
BRICKS Concrete Coursing
CAVITY WALLS Aerated Concrete Panels Modular Construction Elements
CAVITY WALLS Aerated Concrete Panels Storey Height Panels
CAVITY WALLS External Concrete
COURSING BRICKS Concrete
COURSING BRICKS Concrete Coursing Solid Units
FOUNDATION Design
HOUSE BUILDING SYSTEMS OSM (Offsite Manufacture)
HOUSE BUILDING SYSTEMS OSM (Offsite Manufacture) Complete Whole House Shells
INSULATION BLOCKS .See Also BLOCKS: Thermal Insulation:
MORTARS Blockwork Thin Joint
MORTARS Blockwork Thin Joint BS EN 998-2
PARTITION WALLING AGREMENT CERTIFICATE HOLDERS
PARTITION WALLING Concrete Building Regs Part E
PARTITION WALLING Concrete Units Lightweight Aerated Concrete
PARTITION WALLING Concrete Units Lightweight Aerated Concrete Modular Elements
PARTITION WALLING Concrete Units Lightweight Aerated Concrete Storey Height Panels
SOLID WALL CONSTRUCTION Concrete Blocks
UNITS Precast Concrete Coursing
WALL SYSTEMS OSM (Offsite Manufacture)
WALL SYSTEMS Prefabricated Elements
WALL SYSTEMS Prefabricated Elements Modular Aerated Concrete Panels
WALL SYSTEMS Prefabricated Elements Modular Aerated Concrete Panels Storey Height
WALLS Flanking Concrete
WALLS Flanking Concrete Aerated Concrete Panels Modular Elements
WALLS Flanking Concrete Aerated Concrete Panels Storey Height
WALLS Separating Concrete
WALLS Separating Concrete Aerated Concrete Panels Modular Elements
WALLS Separating Concrete Aerated Concrete Panels Storey Height
AIRCRETE BLOCKS Concrete Blocks
CELCON Blocks
CELCON ELEMENTS Precast Concrete Modular Construction Elements
CELCON FLOORBLOCK Infill Blocks
CELCON FOUNDATION Blocks
CELCON PLUS Blocks
CELCON SOLAR Blocks
CELCON STANDARD Blocks
CELFIX Mortar
HIGH-STRENGTH (replaces HI-SEVEN) Concrete Blocks
JUMBO BLOKS Large Aerated Concrete Blocks
MULTI PLATES Large Aerated Concrete Blocks
RA BUILD All In One Building Concept
RÅ HOUSE All In One Building Concept
SIG I-HOUSE OSM Off-Site Manufacture House Building System
SOLAR GRADE Blocks
SUPER-STRENGTH (replaces HI-TEN) Concrete Blocks
THIN-JOINT SYSTEM Block Walling System
VERTICAL ELEMENTS Building Panels

Church renovation project by Clement’s steel door screen with matching Windows

January 2024

Clement Windows Group has manufactured and installed a large, bespoke, striking steel door screen and feature steel window for St Paul’s Church in Leeds.

The steel screen incorporates a pair of double doors, providing light and airiness. Both the door set and the new steel window are made from Clement EB24 steel sections which include double glazed, argon filled glass units. The fenestration is polyester powder painted RAL 7016 (Anthracite Grey) and features pull handles with satin stainless finish.

Vicar, Mark Harlow, said of the project: “St Paul’s Church embarked on a major refurbishment of their 60 year old building to make a warm and welcoming, adaptable space while keeping to the original architect’s ideas. A key part of the brief was to widen the entrance corridor and allow light into one end. This has all been more than achieved using Clement’s metal frame windows and doors. These have helped create an additional space for people to meet and mix. The narrow profile of the frames has allowed maximum light and visual access between the spaces, while the rhythm of the glazing bars both modernises and blends with the architecture of the main worship space.”

Architect, Tom Robbins of Pearce Bottomley Architects, commented: “We have worked with Clement on a number of projects and have been very pleased with the service we have received and the quality of their products. They supplied the steel framed glazed screen and feature window at St Paul’s Church, Ireland Wood, Leeds and we couldn’t have been happier with the result. We also specify Clement’s conservation rooflights whenever we can, as we are of the opinion that they are the best on the market.”

Tel: 01428 643393

Email: info@clementwg.co.uk

Web: clementwindows.co.uk

Meeting the Future Homes Standard with H+H aircrete

January 2024

H+H’s unwavering commitment to energy-efficient building solutions and a fabric first approach aligns neatly with the aims of the Future Homes Standard.

A fabric first approach will be fundamental to meeting the requirements of the 2025 Future Homes Standard, for which the government published its consultation on 13th December 2023. Backed by a commitment to energy efficiency and reducing the carbon emissions of new homes, the consultation on the Future Homes Standard suggests u-Value for walls remains at 0.18W/m2K and that new homes will use low-carbon heating and be ‘zero-carbon ready’.

This methodology prioritises minimising heat loss by ensuring the building envelope meets the highest standards. To put it simply: housebuilders will need to pursue a fabric first approach by specifying high performing fabric materials from the outset.

Project 80

H+H is proud to have been involved in Project 80, a pioneering development by Midlands Heart Housing Association, which showcases homes already built to the Future Homes Standard using aircrete. These homes, monitored and evaluated for performance, demonstrated a 70% carbon reduction when combining heat pumps and PV panels in masonry structures.

Insights gleaned from Project 80 are invaluable, offering a blueprint for achieving an impressive 80-90% carbon emissions reduction. Increased insulation, enhanced window specifications, improved airtightness, and strategic education on effective heating and ventilation are just some of the strategies identified.

H+H’s participation in Project 80 is a testament to its dedication to a fabric first approach. H+H aircrete blocks contribute to the construction of energy-efficient, airtight buildings, enhancing the performance of technologies like underfloor heating and air source heat pumps. These innovations were integral to the success of the first 12 homes in Project 80.

H+H fabric first projects

H+H has a track record of working collaboratively to help developers achieve ever higher fabric performance standards, including projects which also employ Modern Methods of Construction. For example, the Cameron Close Passivhaus development for Southern Housing and the Norton Farm development for Bromsgrove District Housing Trust.

For the Cameron Close development of 16 semi-detached Passivhaus homes on the Isle of Wight, H+H worked with the scheme’s developer on the application of Thin-Joint blockwork. In this instance, H+H’s 200mm thick Celcon Plus Blocks have been used to construct Thin-Joint aircrete, load-bearing walls. Apart from accelerating the construction process, the Thin-Joints play a role in enhancing the residences’ airtightness, thereby improving their overall energy efficiency.

At the Norton Farm development, H+H’s Vertical Wall Panels have been used to speed the construction of the building’s energy efficient fabric. H+H’s Vertical Wall Panels, part of its i-House MMC system, have been used to construct 164 units.

The Vertical Wall Panels are manufactured in aircrete to the storey height of a standard house. Use of the Vertical Wall Panel system on this project enables the external brick or rendered-block facade to be taken off the critical path. More importantly, the Vertical Wall Panel system is a key element in creating an insulated, airtight building envelope.

As we approach the 2025 Future Homes Standard, adopting a fabric-first construction philosophy, supported by materials like aircrete, will pave the way for sustainable, low-carbon housing.

Call us to discuss your housing project on 01732 880111 or email iot@hhcelcon.co.uk. www.hhcelcon.co.uk

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