Foam is less permeable to water vapor and the back of the siding stays wet as the face of the siding dries.
Building science insulated sheathing wood siding.
Wood siding needs an air space between its backside and the face of foam sheathing.
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Hot sun can overheat wood siding causing it to dry excessively and crack.
To be sustainable a building must not only be efficient and durable but also economically viable.
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Structural sheathing gives a home or commercial building integrity and rigidity.
Guide to insulating sheathing.
Insulated sheathing in a cold climate.
Residential housing design continues to move towards the development of high performance sustainable building systems.
The thermal resistance of each of the products will vary.
In general eps foam has the lowest r value per inch with xps being slightly more efficient and with polyisocyanurate having the best r value per.
From this new methods of enclosure design have been examined that provide high thermal performance and long term durability but also take opportunities to.
When insulated siding is installed over furring strips the space between the furring strips must be filled in with rigid insulation or another appropriate building material.
It provides a surface for the application of materials like siding and helps shield a structure from rain snow wind etc.
In order for insulated siding to qualify as home insulation it must be installed directly over a water resistive barrier and sheathing.
As a result the siding cups cracks and sheds paint.