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What I look for in the structure of an old
building:
When I look over an old building during an
initial visit, I like to start outside and take a
walk around the building, I like to be sure that
water is properly draining away from the
foundation. I like to see a foundation that is not
bulging or coming apart. If there is simply loose
or missing mortar, I see no need for worry as this
is merely a cosmetic problem. I also look at the
roof line to see if the building has settled and
if so, how much? I look for signs of water damage
along the walls and I check the condition of the
roof, this helps me look for possible problems
inside if I happen to spot a potential problem
outside. I look for water seepage anywhere on the
building as water is a major enemy of a building
and should always be sealed out of a building's
exterior to ensure it's stability. When someone is
considering an old home to restore, the first
thing I recommend is stabilizing the building by
sealing the exterior from wind, water,
animals/insects.
Once inside a building, starting in the
cellar/basement/crawlspace, I look for water
seepage, settling & rot. Many people are
alarmed when they notice small pin-holes in floor
joists and flooring when in any basement or
cellar, these holes are present in the wood of
every old house I've ever been in and they pose no
threat to the structure and are caused by powder
post beetles. Termite damage is the thing to look
for and cause for concern.
In many brick and stone homes, the ends of the
floor joists deteriorate where they contact the
masonry wall. This is due mainly to the constant
level of moisture inside the masonry walls and
thus the moisture is an enemy of the wood joist. I
rectify the problem with rotted joist ends by
either building a pressure treated frame wall
along the edge of the foundation thus supporting
the ends of the joists, or I place pressure
treated wood posts under any deteriorated joist.
I look very carefully at the building's
framework, I look at the support posts, girders,
joists within the cellar/basement and then once I
make my way to the attic, I take a good look at
the rafters. I like to see sound material that
isn't broken or rotted. Depending on the degree of
deterioration and the position of the
framing/structural member, I'll either repair, add
additional support or simply replace the
deteriorated member.
Within the living area of the house, I look at
the cracks in the plaster walls to see if there is
any noticeable and/or predictable movement within
the building. Some old houses have settled
tremendously, yet retain their structural
integrity while others do not. Some buildings can
be lifted/jacked back into position, this should
only be performed by a professional who can tell
where and what point to do this.
Sagging floors are quite common in old homes
and pose no threat to the structural integrity of
the building. Many times we've added structural
support to floor framing systems to add load
bearing capacity to a floor even though the floor
may still be sagging, there's more strength added
to it (bring in the piano).
Sometimes people are frightened by what they
see in older homes simply because they are not
aware of how these homes were built. By shedding
some light on what the typical problems are and
how to rectify them, I hope this will dispel their
fear and create a better understanding and respect
for the older homes in this area.
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