Brown
rot fungi feed on the wood's cellulose leaving a brown residue of lignin, a
substance that holds the cells together. Infested wood may be greatly weakened,
even before decay can be seen. Advanced infestations of brown rot are evidenced
by wood browner in color than normal, tending to crack across the grain, shrink
and collapse. When dried, wood previously infested will turn to powder when
crushed. Often, old infestations of brown rot, which have dried out, are
labeled as "dry rot." This is really an incorrect term since wood
will not decay when dry.
Integrity
Pest Management, Inc. uses Borate Solution product when treating for wood
boring insects and fungi. Treatments with Borates
are highly effective as a pesticide. Borates use a unique
approach for the control of wood boring beetles. When applied to bare wood,
Borates deposit micro-crystals of boric acid in the wood, poisoning the beetle
larvae's food source and interrupting their life cycle. Borates eliminate
active beetle infestations and will provide long-term protection against
re-infestation.
Treatment
with Borates should not be considered as a total replacement for moisture
control. Leaky plumbing, drain spouts and other moisture problems should always
be repaired in addition to treatment. Wet crawl spaces should be vented and
moisture barrier installed when deemed necessary. Structural wood members that
are no longer sound must be replaced. Although Borates will kill decay fungi,
it will not add strength to rotted wood.
If
the decay hazard is high, select the heartwood of decay-resistant species or
use wood properly treated with a good preservative.
Build
on a well-drained site. Use proper grading to prevent water from seeping under
the house. Install effective drainage, allow for roof overhang, gutters, and
downspouts. Place no untreated wood within 18 inches of the ground.
Provide
adequate cross ventilation beneath buildings to eliminate dead air pockets.
Install two square feet of opening for 25 linear feet of wall. Dense bushes or
other plants should not be placed in front of these ventilators.
Install
a vapor barrier on the soil surface to cause soil moisture to condense on the
barrier and return to the soil rather than condensing on the floor and above
joists.
Covering
the soil with polyethylene sheeting can make satisfactory barriers.
First
determine the source of moisture and remove it. If adequate ventilation and
soil drainage are provided and all contacts of untreated wood with the soil or
moist concrete or masonry are broken, decayed wood will dry out and further decay
will be stopped.
When
making replacements, cut out at least one foot beyond the rotten area. Avoid
placing new lumber in contact with old, decayed wood.
Replacement
lumber should be treated before installation.
Remodel
to provide more ventilation and better design rather than simply replacing
decayed lumber.
Moisture control
Unwanted moisture can lead to wood rot, fungus, mold and mildew, and it's an
open invitation for termites and other pests. Our trained technicians can
assist you in preventing these conditions with borate wood treatment, vapor
barriers, foundation vents and other solutions.