RE: [GBlist] Drainage Planes/Hardieplank
<Joe Lstibrek's
seminars really drive home that ALL claddings/sidings leak and ALL need a
drainage plane Linda >
Where
might these seminars be found. Id be interested in reading them
since I,ve heard before but do not know how to find
them.
I do
find that building technology grows in ways that are not always in sinc with
practical problems. Its a back and forth of sometimes under reaction sometimes
over. I tend to think this issue is the latter. What I have found is
buildings poorly flashed or not at all and have other significant
weather conditions (too numerous to go into here) will have water infiltrate
behind the siding. A stand off drainage plane is then warranted although
anyone who will not flash correctly isnt about to bother with the extra work.
Also, as said, various wood sidings decay too easily although
backpriming will go a long way under normal service conditions. On One building
where we took all the pine siding off showed absolutely no water and moisture
presence let alone damage. The siding was about 25 years old and done to
normal standards of the day. Can a stand off system lengthen the life span? I'm
sure it does, and if the extra unknown life span is desirable then so be
it. Hey a stand off system cant hurt. If you want to spend the money--go for
it.
As far as recommending to my clients that it is necessary I
can not do so in my region if the buildings are in normal exposures, with normal
waterproofing features, and with normal budgets. As with all built intervention
there is a place and scale for everything. The trick is to use the right
ones for the situations and not overdesign. Lets also keep two other
very human things in mind. 1. Overdesign is common as a liability
protection-particularly when its someone elses money that is being spent.
And 2. Research groups and government do not always care nor have the ability to
match severity to the solutions they are spending their careers
on.
Same
old, same old--balancing the practical, the theory, the best practice and the
air.
In a message dated 4/21/2002 12:18:22 AM
Eastern Standard Time, lenking@blueridge.net writes:
To me,
one of the benefits of lap type horizontal siding is
their ability to
'drain' and breath at every lap. Thereby reducing all
the larger dangers to
the sheathing and wall. Is a stand off system
really necessary?
