Drainage Plane Behind Siding

With vinyl and aluminum siding the drainage space is more pronounced and furring is not necessary.

Drainage plane behind siding.

It makes its own drainage gap. Siding is applied directly over the drainage mat so water can drain out and air can flow in. Old timers will tell you there s no substitute for using tar paper under siding. Extend siding life with drainage planes all siding leaks.

Since you have tyvek you re all set. Below the window air can flow up and out behind a notch in the trim board. So why use a drainage mat product behind your stucco cultured stone man made stone thin brick hardboard siding or other veneer. 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.

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. Drainage planes are water repellent materials building paper house wrap sheet membranes etc that are located behind the cladding and are designed and constructed to drain water that passes through the cladding. With wood siding the drainage space is typically intermittent and depends largely on the profile of the siding. Behind vinyl siding you definitely need a water resistant barrier wrb.

A 1 inch air gap is needed behind brick veneer as required by the 2009 international residential code irc baechler et al. After the windows are installed add a mesh drainage mat to the outside the wall. One of the first things that a good builder learns early in their career is the fact that all siding. 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.

There s probably some truth.