With wood siding the drainage space is typically intermittent and depends largely on the profile of the siding.
Drainage plane behind siding.
Behind vinyl siding you definitely need a water resistant barrier wrb.
Below the window air can flow up and out behind a notch in the trim board.
Building america recommends a gap of at least 1 16 inch behind lap siding and a drainage space of inch between stucco and plastic house wraps to control liquid phase water penetration.
Provides a continuous drainage plane behind rainscreen systems and stone and stucco veneers download product overview wallnet wallnet allows moisture to easily flow to the weeps promotes drying to help prevent mold growth and moisture damage and can help extend the life of siding materials by helping them dry from the back.
Ideally wood siding should be installed over furring creating a drained and vented air space between the drainage plane and wood siding.
This space is known scientifically as a drainage plane and it is most effectively created by installing a product commonly referred to in the industry as a drainage mat.
Old timers will tell you there s no substitute for using tar paper under siding.
One of the first things that a good builder learns early in their career is the fact that all siding.
You don t need a separate air gap between the vinyl siding and the tyvek because vinyl siding is installed loosely and doesn t sit tight to the sheathing.
So why use a drainage mat product behind your stucco cultured stone man made stone thin brick hardboard siding or other veneer.
Above the window is the same deal water can drain out air can flow in.
Since you have tyvek you re all set.
A 1 inch air gap is needed behind brick veneer as required by the 2009 international residential code irc baechler et al.
With vinyl and aluminum siding the drainage space is more pronounced and furring is not necessary.
Extend siding life with drainage planes all siding leaks.
There s probably some truth.
It makes its own drainage gap.