Building codes are regulations that control almost
every aspect of home design and construction. Every new home, remodeling
project, or room addition must be designed and built in accordance with
the codes that regulate the structural design, energy efficiency,
construction quality, and overall safety of structures occupied by the
public.
Codes dictate the size and configuration of stairs; the number and type
of windows and glass; the amount of energy the house consumes; methods
and materials of construction; the location of smoke detectors; and
hundreds of other items.
A new homeowner may only be minimally aware of the impact of building
codes on his home, since most code issues are addressed before he
occupies it.
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remodeling or room addition are likely to become very familiar
with how building codes affect the design, construction, and
cost of their project. That's because building codes often require work to be done to parts of
the house that seem otherwise sound - it can be an unpleasant surprise
to find that you've got to tear out the ceiling of a room in which you'd
planned no significant work.
Below are a few of the larger code-related issues often encountered in
home remodeling, and some suggestions on how you can plan for them. |
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More Power!
It should be assumed that any home more than thirty years old will
require an update of the electrical system. Usually the culprit is too
little power to serve the needs of modern life; current electrical codes
require about three times the number of power outlets than a few decades
ago.
These additional outlets will necessitate a larger electrical panel,
which may in turn require a larger electrical service (more power!).
Unfortunately this is a hard problem to avoid. If you're planning to add
on or remodel, be sure your contractor budgets for an electrical
upgrade.
What's Holding You Up?
The older a home is the less it's likely to meet today's codes for
structural strength. If work is done in an area of original
construction, the structure will probably need some reinforcing - even
if the structure's been standing solidly for years.
Any remodeling that exposes existing structure or changes the way loads
are distributed on the floors and walls will require a review of the
home's structure. Additions also often cause structural changes as
existing supports are altered or removed to make way for the new work.
But reworking the structural elements of a home often plants a bigger
(and more expensive) obstacle in the way - the necessary relocation of
existing electrical wiring and ductwork that may be routed through the
framing. It's part of what's called the "ripple effect" - a small change
in one area ripples throughout the house. Whenever possible, minimize
the ripple effect by designing an addition that doesn't disrupt the
house's structure and by remodeling existing rooms without moving walls.
Where there's Smoke...
Smoke detectors are of two types, battery powered and "hard-wired".
Hard-wired detectors are powered from the homes' electrical system, and
are interconnected - when one goes off, they all go off. Residential
codes require that all new homes have hard-wired detectors, and most
jurisdictions require their installation throughout the home when any
part of it is remodeled.
Carbon monoxide detectors are a new addition to many local codes.
According to the Journal of the American Medical Association, carbon
monoxide is the leading cause of accidental poisoning deaths in America.
CO2 detectors are similar in appearance to the more familiar smoke
detectors and cost about $40 retail.
Plan on being required to add both smoke and carbon monoxide detectors
to any significant remodeling or addition project.
Watch Your Steps
Stairs are probably the single most dangerous part of any house.
Accidental falls on stairs happen for many reasons (each year about
239,000 or 9% of all stair accidents happen to women in high heels and
children). In the past several years, residential stair requirements
have been gradually increasing to make stairs less steep and easier to
negotiate.
The least restrictive stair geometry allows a maximum step height
("riser") of 8 ¼" and a minimum step depth ("tread") of 9". Code writers
are in the process of decreasing the riser height to 7" and increasing
the tread depth to 11", resulting in a much less steep stair and
hopefully, improved stair safety.
But these safer stairs are also larger - be sure to know the stair codes
in your area before you lay out the design of your project.
Good Help Isn't Hard To Find
Experienced architects, remodeling contractors, plan examiners, and
building inspectors can help you to anticipate many of the potential
code issues hidden in older homes. A little time and money invested in a
qualified review of your ideas can help you to avoid expensive surprises
later on.
Richard L. Taylor, AIA is a published author and recognized expert in
Residential Architecture. He is President of Richard Taylor Architects,
a 5-person firm in Historic Dublin, Ohio.
Residential Architect - Luxury Home Plans
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