De faktiska kodkraven beror på din kommun / behörighetsmyndighet (AHJ). Också, kom ihåg att kraven på många ställen var olika för flera år sedan. Några ställen vinylsidor krävde inte ett WRB under det.
De bästa metoderna är dock att du i allmänhet behöver en vapour barrier
, air barrier
, insulation
, weather resistive barrier
(wrb) och cladding
(och helst en regnskärm) i ditt väggsystem.
Vinylskyddet är beklädnaden, under det att du vill ha en wrb som tyvek (+ blinkar).
Från vinylsiding.org:
Weather Resistant Barrier
Vinyl siding has always been designed as an exterior cladding, not a weather resistant barrier.
Vinyl siding is designed to allow the material underneath it to breathe; therefore, it is not a watertight covering.
Because of its design and application, it provides a supplemental rain screen
that enhances the weather resistant barrier system by reducing the amount of water that reaches the underlying weather resistant barrier.
What Is a Weather Resistant Barrier System?
It is a system that includes water shedding materials
and water diversion materials. Weather resistant barrier systems commonly consist of a combination of exterior cladding, flashed wall openings and penetrations, weather resistant barrier material, and sheathing. Effective weather resistant barrier systems will shed the water initially, control moisture flow by capillary and diffusion action, and minimize absorption into the wall structure. The level of weather resistance required is determined by the applicable building code and structure
Best Practice:
To achieve designed performance, vinyl siding must be installed over a weather resistant barrier system that includes
a continuous weather resistant material and
properly integrated flashing around all penetrations and where vinyl siding interfaces with other building products such as brick, stone, or stucco.
Refer to the manufacturer’s installation manual for specific product applications and recommendations. Whichever product(s) you decide to use as part of a weather resistant barrier system, be certain the materials meet the applicable code by contacting the manufacturer of the weather resistant barrier material(s). Always consult the applicable building code for minimum weather barrier requirements in your area. Keep in mind that additional measures may provide better protection against water intrusion than the minimum requirements of the building code.