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:

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 (BS 6073)
BLOCKS Aircrete .
BLOCKS Aircrete Acoustic Performance Robust Detail
BLOCKS Aircrete AGREMENT CERTIFICATE HOLDERS
BLOCKS Aircrete Approved Document E
BLOCKS Aircrete Beam and Block Flooring Infill
BLOCKS Aircrete BRE Green Guide A+ Rating
BLOCKS Aircrete BS EN 771-4 (BS 6073) CE Marked
BLOCKS Aircrete Fire Resistant Class A1
BLOCKS Aircrete Large Format
BLOCKS Aircrete Thin Joints Systems
BLOCKS Approved Doc Part L .
BLOCKS BS 14001 .
BLOCKS BS 5051 Class G2 (Ballistics)
BLOCKS BS 5628:Part 1 Special Category .
BLOCKS BS EN 1996-1,2,3 .
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 Eurocode ENV1996-1-2-:1995
BLOCKS Concrete Party Walls .
BLOCKS Concrete Party Walls Sound Insulation
BLOCKS Concrete Thin Layer Joint Systems Masonry
BLOCKS Coursing .
BLOCKS Coursing Brick Format Units
BLOCKS Featherweight BS EN 771-4 (BS 6073) .
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 AGREMENT CERTIFICATE HOLDERS
BLOCKS Lightweight Aerated Concrete Beam and Block Flooring Infill
BLOCKS Lightweight Aerated Concrete Below DPC
BLOCKS Lightweight Aerated Concrete Brick Coursing Size
BLOCKS Lightweight Aerated Concrete BS EN 771-4 (BS 6073)
BLOCKS Lightweight Aerated Concrete Cavity Wall
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 Thin Layer Joint Masonry
BLOCKS Lightweight Aerated Concrete Thin Layer Joint Masonry / Thin Joint Systems
BLOCKS Lightweight Concrete: .
BLOCKS Lightweight Concrete: BS 5628
BLOCKS Lightweight Concrete: BS EN 771-4 (BS 6073)
BLOCKS Plain Finish .
BLOCKS Sound Insulation .
BLOCKS Sulfate Resistance Sulfate Classes up to Class 4
BLOCKS Thermal Insulation Insulating .
BLOCKS Thermal Insulation Insulating AGREMENT CERTIFICATE HOLDERS
BLOCKS Thermal Insulation Insulating Anti-Cold Bridging / Cold Bridge Elimination
BLOCKS Thermal Insulation Insulating Below DPC
BLOCKS Thermal Insulation Insulating Lightweight High Strength
BLOCKS Thermal Insulation Insulating NHBC Requirements
BLOCKS Thermal Insulation Insulating Specialist Application Higher Thermal Conductivity
BLOCKS Thermal Insulation Insulating Thermal Bridge / Thermal Bridging Elimination
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 Insulating: .
MORTARS Blockwork Thin Joint
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

AIRCRETE AND THE MMC AGENDA

November 2020

The fundamentals of aircrete as a material have not changed since it was introduced into the UK market over sixty years ago. However, it has proved its worth over time and now makes a strong case for inclusion as a Modern Method of Construction (MMC).

It is hardly a secret that since the publication of the dramatic “Modernise or Die” white paper in 2016, government focus has sharpened on the need to support methods of housebuilding that are faster and higher performance.

Much of the debate on the subject focuses on factory-build modular homes, but in fact the definition of MMC is much broader and there is certainly nothing to dictate which materials or method are preferable.

The MCHLG definition makes it clear that it is focused on objectives and is not trying to be prescriptive as to what products or methods are used to achieve them.

Aircrete remains the preferred material for most UK housebuilders. Combining strength with inherent thermal efficiency, aircrete blocks are also easy to use on site and, most importantly, provide the flexibility that housebuilders need when planning their sites. The speed of build can be increased or slowed in reaction to demand or to weather conditions.

Standard aircrete blocks with traditional cementitious mortar are typically used for cavity wall construction. Repeated performance testing demonstrates that such wall constructions are easily able to meet the U-Value requirements of current building regulations and the uplift anticipated when the revised Approved Document L is published.

Where increased airtightness is the objective, the highest performance levels can be achieved with Thin-Joint construction – which has been the preferred choice for various low carbon and Passivhaus certified developments.

The ultra-thin joint which gives the system its name is not only airtight, but also, having a much faster curing time, allows for increased speed of build. With higher tolerances, the method also supports a more accurate build. Both these characteristics contribute to the system being acknowledged as a Modern Method of Construction.

Where a more system-based approach is required – particularly for larger developments of standard house types for affordable or build-to-rent markets – H+H has developed an entirely different solution.

Based on Celcon Elements: story-high panels of aircrete, the I-House system was developed in partnership with Roof Space Limited. The concept was to develop a housebuilding system, based on aircrete, that allowed the entire structure of a house to be built on site within a week.

Celcon Elements provide the walls which are simply craned into place onto pre-prepared foundations. Prefabricated timber first floors and prefabricated roofs complete the structure and the package is finished with exterior insulation. Within a week there is a watertight shell, ready for interior trades to move on site and exterior finishes such as masonry to be applied simultaneously.

Recognised on introduction in 2017 with a Housebuilder award, the I-house system has also been supported with both BPOAS and NHBC warranties and is rapidly gaining ground as an advanced Modern Method of Construction.

For more information on aircrete and on the range of building solutions provided by H+H, visit www.hhcelcon.co.uk.

H+H Offsite and NHBC

October 2020

We started work on developing our I-House solution with Roofspace Solutions back in 2015. Now it is an accepted MMC solutions, recognised and warranted by both NHBC and BOPAS.

The I-House system is based on Celcon Elements – storey-high panels of aircrete that are craned into place on site. Combined with pre-fabricated timber floors and roof system, and constructed by a specialist contracting team, the I-House system can deliver the complete watertight shell of a house on site within a week.

Celcon Elements have been in use in Europe for decades and as long ago as 2007 we used the concept as the basis for zero carbon demonstration projects with both Barratts and Miller Homes.

However, it took a severe skills shortage and a certain amount of government pressure for the housebuilding industry in the UK to start looking seriously at ways to use aircrete in Modern Methods of Construction.

I-House is perhaps the most radical system, so the acceptance by both NHBC and BOPAS is an essential reassurance for users.

We are delighted to see the number of projects using the system growing, with Barratts being an early adopter.

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