What is Infrared
Thermograph (Thermal Imaging)
nothing but the temperature profiling of a
surface or point. As the name suggests,
infrared thermograph is based on Infrared
(IR) technique. The principle underlying
this technique is that every object emits
certain amount of IR energy and the
intensity of this IR radiation is a function
of temperature. The IR energy which can
directly represent the surface temperature
can be detected and quantified by the help
of IR scanning system.
disadvantages of thermograph
Due to the low
volume of thermal cameras, quality
cameras often have a high price range
(often up to $20,000). But there
are the cheaper ($1500 -$2000) camera’s
that are inferior and currently in use.
Images can be
difficult to interpret accurately when
based upon certain objects, specifically
objects with erratic temperatures (shade
temperature measurements are hindered by
differing emissivity’s and reflections
from other surfaces.
have ±2% accuracy or worse and are not
as accurate as contact methods.
A hand held
moisture meter is still used to verify
Only able to
directly detect surface temperatures
(can not see inside walls).
these devises is limited and there is no
New Jersey state certification.
Thermal imaging for
detection of termites.
This is a newer method, in use and
development in Australia.
Specifically, for the detection of
termites, but it still suffers the same
problems that dog inspections do.
That is, they don't detect termite
damage, carpenter ants and powder post
beetles, and they won't detect termite
infestations that may be currently
inactive but still viable.
Thermal imaging is a fantastic technology.
Like most technologies there is a growing
stage, and we feel that this is where
thermal imaging is now for this profession.
At this time Aggressive will wait until the
technology has proven itself to the point
where we feel comfortable to offer our
clients a 100% proven technology.
Numerous seminars have been attended and it
has been determined that there are just to
many variables, to use thermal imaging as a
benefit to our clients. The tester has
to be well trained and not a part time user
like a home inspector. There are
currently a few professional thermographer's
that do thermal imaging as a full time
profession. It is felt that these are
the people to contact if a thermal image of
a dwelling is required.
Thermal imaging is a legal can of worms for
the home inspector. Clients are lead
to believe that this technology will let
them sleep better at night. But in
reality we as home inspectors know that the
inspection report most definitely will have
a big disclaimer releasing the home
inspector that uses thermal imaging of all
liability because of its deficiencies or a
warranty will be offered.