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Sage Creek in Kelowna is a good example of the use of modular homes |
Imagine if cars were built like houses.
One day, sheets of steel arrive on site for metal workers to cut and weld in
the rain. Wheels show up, but unfortunately, the axle installer is sick so they
are left lying around. Rolls of vinyl for the seats are delivered, but that
installer is delayed because of an accident on the Second Narrows Bridge. You
get the picture.
I thought about the differences between building cars and houses on a recent
tour of a Kelowna manufactured housing factory organized as part of the 2017
Manufactured Housing Association of British Columbia’s annual conference. I was
invited to offer the perspective of an architect and developer on factory-built
housing to an audience comprising manufacturers, dealers, transporters and
government officials.
I have had a longstanding interest in manufactured housing dating back to
1970 when I was one of seven architectural students from across Canada to win a
CMHC travelling scholarship. Our travels took us across the U.S. with guide
Warren Chalk, one of the founding members of Archigram, an avant-garde 1960s
British architectural group, with projects that included Plug-in-City, a
massive framework into which modular dwellings could be slotted and removed.
For six weeks, we toured mobile home parks and housing factories on a
government initiative to promote manufactured housing on a major scale.
In my university thesis, I focused on a factory-produced relocatable housing
system, and proposed that just as schools set up portable classrooms,
governments could install modular housing on vacant lots. This could then be
relocated when the property was needed for redevelopment, effectively
eliminating the cost of land.
That interest continued after I joined CMHC in Vancouver as assistant
architect/planner. In the mid Seventies, CMHC was building seniors’
housing around the province and I proposed factory-production for smaller communities.
Soon, modular housing was delivered and assembled in Keremeos and Chase.
Today, BC Housing continues to build seniors’ housing projects in smaller
communities using factory-built modular housing.
In recent years, BC Housing and the City of Vancouver undertook a
feasibility study of a concept to promote relocatable modular housing as an
alternative to housing people in shelters. A team led by NSDA Architects and
housing manufacturers Britco and Shelter Industries examined technical issues
and costs associated with building, setting up and relocating private sleeping
rooms and bathrooms.
Recently, the Vancouver Affordable Housing Agency, with financial support
from CMHC, completed a factory-built modular housing demonstration project at
Main Street and Terminal. The modules will be relocated in a few years when the
site is ready for redevelopment. Hopefully, other vacant sites around the
region will be similarly used.
Throughout B.C. today, thousands of attractive permanent homes are being
built in factories. Companies such as Triple M, Moduline, SRI and many other
manufacturing plants are constantly improving assembly-line procedures to build
complete homes in days, rather than weeks or months.
By building in climate-controlled settings, workers are not dealing with
rain or snow. Waste is considerably reduced, and consequently
factory-built homes are cost-effective, environmentally smart, and able to
be customized as on-site construction. For this reason, many of the PNE show homes
have been built using modular construction.
At the Kelowna conference, I learned there are two basic types of
factory-built housing: manufactured homes and modular-built homes.
Manufactured homes are typically constructed on a steel frame in one or two
sections and are virtually complete when they leave the factory. Thus, they are
ready for move-in the same day or a few days after arriving on the site. These
homes can be installed on simple foundations and even relocated, although most
are never moved from their original site.
Modular-built homes do not have a steel frame. A typical bungalow consists
of one or two modules, while multi-storey homes or buildings are created with
multiple modules. These homes are typically set on full-perimeter foundations
with a crawl space or even a full basement.
Insulation, air/vapour barrier, plumbing, wiring, exterior siding and other
construction details are largely completed in the factory. Interior work,
including drywall, trim, flooring, cabinets and bathroom fixtures, is usually
well advanced. Finishing the home on site can include adding pitched roofs, and
an attached garage or stone facing. This generally takes a couple of weeks.
While I am surprised that factory-produced housing is not more popular in
Canada, expect this to change, since it is cost-effective, energy- and
resource-efficient, and well suited to a variety of housing forms. It could be
an affordable solution for infill and laneway housing, and multi-storey
apartments.
Imagine if houses were built like cars.