|
The following piece of advice
refers to all types of roofing. Never install insulation up against the underside of a
wood roof deck. This will expedite deterioration of the deck and cause it to weaken and
warp. This will happen in about a five to fifteen year time span depending on your
geographical location. The expenses that this will incur are: (1) Redecking your building.
These expenses will usually start at $1.50 per square foot and go up from there, depending
on the type of wood deck that you use. (2) You'll have to reinsulate the building. Because
the insulation was on the backside of the roof deck, when the deck is torn off, the
insulation will go with it. (3) You will be reroofing the building prematurely. Insulation
installed on the underside of the deck rather than at the ceiling level will not only lead
to premature deck deterioration but also to premature roof system deterioration. No
roofing manufacturer will warrant roofing materials with insulation installed on the
backside of the deck.
Why is it detrimental? Heat absorbed by the roof system gets trapped at the deck level.
This heat will cause the decking to warp and, in the case of plywood, the laminates used
to hold the plywood layers together will fail.
If there is some information that you need that is not included in these sections,
please don't hesitate to email RoofHelp.
Also be sure to visit the HOW TO
section. |
