Photo courtesy of Simon Wilson
Best-practice guidance for the design and construction of medium density housing in NZ.
Medium includes industry solutions for key performance areas like acoustics, fire performance, services design and weathertightness.
As both a published book (2022) and online resource, it is a partnership between Guy Marriage (Senior Lecturer at VUW School of Architecture and author of TALL: The Design and Construction of High-Rise Architecture and Modern Apartment Design) and EBOSS.
Update March 2023
To augment the industry solutions in the 2022 book edition of Medium, new supplementary detailed drawings are now available on mediumdensity.nz.
Medium density housing (MDH) explained, NZ’s history of MDH, and how MDH can provide solutions to NZ’s housing affordability issues.
How we can design better, more liveable medium density housing, why we need a low carbon future, how high MDH cities can be, what exactly is the missing middle and what types of MDH there are.
How boundaries and circulation, recreation and social spaces shape MDH living, how to make the most of landscape, typography, hydrology and vegetation in MDH design, what roles carparks and public transport play and how to avoid low quality outcomes for MDH design.
The importance of planning and orientation to the sun, designing entrance lobbies, accessways, stairs, lifts and corridors, and considering flexibility of spaces, storage and garage design for MDH.
Traditional or cutting edge? Discussing structure, prefabrication, inter-tenancy floors and inter-tenancy walls.
Building materials including timber frame, steel frame, brick, block, precast concrete, cross-laminated timber and autoclaved aerated concrete.
|7C||Cross laminated timber (CLT)|
Acoustics, the science of sound, muffling and isolation.
Inter-tenancy floors using timber framing, cross laminated timber, concrete and multi-layered construction systems.
|8A||Floating acoustic floor|
|8B||Flat sheet flooring system|
|8C||Parallel laminated timber (PLT)|
|8E||Metal deck for concrete floors|
|8F||Suspended ceiling system|
Acoustic success and failure
Twin wall timber or steel framing, concrete panels, cross laminated timber, multi-layered construction systems and prefabricated structural systems.
|9B||Permanent formwork concrete walls|
|9C||Autoclaved aerated concrete|
|9D||Concrete-steel interlocking panels|
Cladding systems and structure. Windows, insulation, weathertightness, cavities, control layers and underlays.
SIPS and other systems.
|10D||Rigid air barrier|
|10E||Rigid air barrier|
|10H||Fibre cement cladding|
|10I||Fibre cement cladding|
|10J||Clay brick veneer|
Cold vs warm roofs, skillion, flat and membrane roofs.
Roof gutters, waterproof decks, roof penetrations and party wall junctions.
|11A||Cold roof system|
|11B||Cold roof ventilation|
|11C||Warm roof system|
|11D||Roof garden system|
An Ockham development in Hobsonville Point that features five blocks of apartments assembled around a pleasant courtyard.
An NZ Living development in Onehunga, Auckland, with strong design features including one big long simple roof and long life material selection.
An infill project in Newtown, Wellington, with several small blocks of townhouses, woven around two small green courtyards.
A quality townhouse development on the edge of the East Frame in central Christchurch.
“Now is the perfect time for Medium. Guy Marriage and EBOSS are well-aligned in envisaging a future of better built medium-density housing. Developers, planners, designers and builders would all benefit from Marriage’s superb writing and the efforts of EBOSS to seize this opportunity to influence a better future built environment for Aotearoa.”
— Pamela Bell, Chief Executive, NZIOC
“Successful medium density housing has many technical challenges, but Guy Marriage has shown how to create enduring medium density housing. This delightful book delivers sound advice on how to build better housing.”
— Professor Robyn Phipps, Head of School of Architecture, Victoria University of Wellington
“A mentality refresh is needed; one that focuses on self-education, international best practices, creativity, and a drive to do things better. Medium pushes this mentality by providing industry professionals actionable solutions.”
— Jonathan Hill, Kaizon