# Weather/air barrier sheet membranes

**URL:** <https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683>\
**Category:** MasterFormat 2004 Discussions\
**Created:** [March 25, 2011, 4:49pm UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683 "2011-03-25T16:49:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![David\_Axt](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.4specs.com/david_axt/32/24_2.png) [@David\_Axt](https://forum.4specs.com/u/David_Axt)\
**Post date:** [March 25, 2011, 4:49pm UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683/1 "2011-03-25T16:49:42Z")

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What section / title are you using for “Vaproshield” and “GreenGuard” type weather / air barrier sheet membranes?

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**Author:** ![Phil\_Kabza](https://avatars.discourse-cdn.com/v4/letter/p/6f9a4e/32.png) [@Phil\_Kabza](https://forum.4specs.com/u/Phil_Kabza)\
**Post date:** [March 25, 2011, 5:20pm UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683/2 "2011-03-25T17:20:46Z")

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072500 Weather Barriers if they are non-air-barrier tested products (Varposhield Wall Shield) and 072700 Air Barriers if they are tested for air permeance (Vaproshield WrapShield).

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**Author:** ![specman](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.4specs.com/specman/32/222_2.png) [@specman](https://forum.4specs.com/u/specman)\
**Post date:** [March 25, 2011, 5:28pm UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683/3 "2011-03-25T17:28:58Z")

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Depends on their primary use.

If they’re being used solely as a weather barrier, whether or not they qualify as an air barrier, then 07 25 00 “Weather Barriers.”

If they’re a part of an air barrier system, but do double duty as a weather barrier, then 07 27 00 “Air Barriers.”

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**Author:** ![wilsonconsulting](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.4specs.com/wilsonconsulting/32/128_2.png) [@wilsonconsulting](https://forum.4specs.com/u/wilsonconsulting)\
**Post date:** [March 25, 2011, 8:50pm UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683/4 "2011-03-25T20:50:38Z")

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I created a stand-alone section for VaproShield-type air barrier products to distinguish them from mod bit sheet & fluid-applied membrane types: 07 2715 Permeable Sheet Air Barriers.

I have also spec’d the non-air-barrier versions in 07 2500 Weather Barriers.

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**Author:** ![Phil\_Kabza](https://avatars.discourse-cdn.com/v4/letter/p/6f9a4e/32.png) [@Phil\_Kabza](https://forum.4specs.com/u/Phil_Kabza)\
**Post date:** [March 29, 2011, 2:04am UTC](https://forum.4specs.com/t/weather-air-barrier-sheet-membranes/1683/5 "2011-03-29T02:04:14Z")

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Vaproshield has a full set of downloadable docs on their website: [www.vaproshield.com](http://www.vaproshield.com)