Towards Zero Carbon
Homes with Masonry
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Towards Zero Carbon
Homes with Masonry
Martin Clarke
Chairman MMA
CEO British Precast
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What is the MMA ?
 A two year old consortium of all
sectors with an interest in the
masonry improvement agenda
 Quality, productivity, value,
innovation
 Represent £2+ billion sector
 Products used in 85% of new
homes
 www.modernmasonry.co.uk
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What is the MMA ?
2007 yearbook available
today for all delegates
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What is the MMA ?
 We welcome the CSH as a long
overdue move towards
performance specifications and
away from the unfair and
unscientific MMC approach
 Our response last year advocated
a more rounded approach to
sustainability – still a long way off
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A big step forward
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Masonry and the Zero Carbon
agenda
 Masonry is alive and kicking,
innovative and ambitious
 We have no more of a problem
reaching CSH levels as timberframe and all other materials and
methods
 Growing interest in what else you
get in a masonry home, such
as……….
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Brick and block housing
 Durable –
measured in
centuries
 Quiet
 Fireproof
 Healthy homes
 Local materials
 Secure
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Economic
Robust
Popular
Insect proof
but 1 week
longer building
cycle [NAO]
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Brick and block housing
 and flood
resistant
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Masonry and the Zero Carbon
agenda
 We support the objectives
 We will produce a signed
Concordat to mirror the
Government and HBF initiative
 We have set up a Futures Group
with the HBF – very supportive
people involved
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Masonry and the Zero Carbon
agenda
Thermal Performance for
Zero Carbon Dwellings
Looking at all variables and options
Rough Comparison of Performance Requirements
Element or system:
Notional dwelling
(Part L 2006)
Notional zero carbon dwelling
(Code - level 6)
Walls
U ≈ 0.30 W/m2K
U ≈ 0.2 W/m2K
Floors
U ≈ 0.22 W/m2K
U ≈ 0.15 W/m2K
Roofs
U ≈ 0.16 W/m2K
U ≈ 0.15 W/m2K
Windows and glazed doors
U ≈ 1.8 W/m2K
U ≈1.5 W/m2K
Renewable
technology
Not required
Solar hot water ≈ 1 - 2 m2
Boiler efficiency
SEDBUK band B: 86% - 90%
Ground source heat pump
Air permeability
Around 7 m3/m2/h
Around 5 m3/m2/h
Photovoltaic ≈ 30 m2
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Masonry and the Zero Carbon
agenda
 Aiming to get as much out of the
building fabric as possible
 To do this we are focused on
insulation, air-tightness, thermal
bridging
 We know how much the industry
wishes to avoid both cost and
extra wall thickness – but clearly
some compromise will be
necessary
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Masonry and the Zero Carbon
agenda
 Futures Group guidance is
urgently required by the
housebuilders
 MMA and HBF hope to publish
guidance within 2 or 3 months
focusing on Code levels 3 and 4
 Awaiting Carbon Challenge
technical spec for Bristol and
Peterborough from EP – should
feature thermal mass
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Masonry and the Zero Carbon
agenda
 Levels 5 and 6 will follow –
limited demand as yet – too
expensive with unproven
technology
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Masonry and the Zero Carbon
agenda
 Complex documents; complex
calculations – all set in a shifting
scene
 We are concerned at how the
smaller builder and self-builder
will cope
 As with timber-frame and steelframe and other constructions,
advice will not be “one size fits all”
 One certain change will come
with
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2008 SAP review
Masonry and the Zero Carbon
Agenda
also
Customs & Excise consultation
comments by 31 July
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Eng Doc programme
 Ian Abley – running the MMA
Engineering Doctorate
programme at Loughborough –
the Better Built in Masonry project
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Example
Hanson Building Products
www.hanson.biz
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Hanson House - Offsite 05
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EcoHouse design concept
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EcoHouse design concept
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What does Hanson Ecohouse
demonstrate?
 All the benefits of brick and block plus fast method of
building, factory produced, quality assured, durable,
secure with thermal mass at a price consistent with
current practice.
 The system inherently addresses the more exacting
needs of the new CSH - airtightness, insulation,
sustainability, durability, sound & fire insulation
required for future high performance dwellings.
 The latest in ‘Smart’ building solutions technology with
remote operation of heating, lighting, energy
monitoring security and interactive web-based hub link
to community services for healthcare, education,
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welfare & leisure.
Is it fast to build ?
 The glued masonry walling system is faster to
completion than comparative panelised timber
systems since they normally require the external
façade to be constructed after the basic structure is
erected whereas Hanson’s system comes complete
with external full brick finish.
 Pre installed wiring loops and outlets can be
incorporated into the walls prior to erection
 Exposed elements are not susceptible to damage
from inclement weather conditions during
construction
(or fire for that matter!)
 Disregarding choice of roofing system for Ecohouse
the time for construction of roof will be similar.
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Ecohouse prefabricated walls
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Ecohouse – prefabricated walls
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Ecohouse- prefabricated walls
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Ecohouse
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Example
Tarmac Topblock
 Excellent Tarmac Webinar on
achieving the CSH with masonry was
broadcast live last week organised
with Building magazine
 Can be checked out at
www.topblock.co.uk
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Example
H+H UK
www.celcon.co.uk
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Aircrete and its Properties
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Innovations with Aircrete Masonry
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• Thermal Insulation
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• Resistant to Sound Transfer
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• Excellent Fire Resistance
100mm non-load bearing
Standard wall - 4 hours
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Rå House
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Where Celcon can help you maximise your Total
Points
• Wall U-value
• Thermal bridging
• Airtightness (workability of aircrete….)
• Environmental (EMS / Green Guide)
• RDs for sound insulation
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Complete package of
guidance on
achieving the CSH
available from H+H
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Thermal mass can contribute
significantly to zero carbon
Important work by Arup, CIBSE, The
Concrete Centre
Now recognised by CLG
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Just 3 examples of many
 Aggregate Industries –
Masterblock division - Sustainable
products programme eg
Enviromasonry. Level 6 precast
house imminent.
 Forticrete – FI masonry cladding
system with Ibstock
 Full list from websites or
[email protected]
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Precast options
Physical properties essentially the
same as masonry but can also
provide paintable finish thus
maximising admittance
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HAMMARBY SJÖSTAD
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www.hammarbysjostad.se
The core of the environmental and infrastructural planning of Hammarby
Sjöstad jointly developed by Stockholm Water Company, Fortum and the
City of Stockholm Waste Management Administration can be summarised in
an eco-cycle model known as the Hammarby Model.
This model shows the interaction between sewage and refuse processing
and energy provision, as well as the added benefits to society of modern
sewage, energy and waste processing systems.
The overall goal “twice as good as the norm” required new ideas for
energy, water, waste, transport, building design, construction site logistics
all those systems that we normally take for granted in a modern city.
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Is a largely
precast build
but masonry
can learn from
it
Further visit
being
organised
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Watch this space
 New insulation combinations –
Vacuum Insulated Masonry; foil
systems; even phase change
materials as used by lightweight
house suppliers
 More Masonry packages – cf Ra
 More use of recycled materials
 Responsible sourcing credit
scheme to improve on FSC
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scheme for timber
Watch these spaces
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www.modernmasonry.co.uk
www.cba-blocks.org.uk
www.aircrete.co.uk
www.brick.org.uk
www.britishprecast.org
Thermal mass reports
www.concretecentre.com
www.passivhaus.org.uk
www.passivehouse.com
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Brick and block –
sustainable choice
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the
www.modernmasonry.co.uk
www.cba-blocks.org.uk
www.aircrete.co.uk
www.brick.org.uk
www.britishprecast.org
Thermal mass reports
www.concretecentre.com
www.passivhaus.org.uk
www.passivehouse.com
Thank you
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