# Vapor Barrier where multiple types of insulation are used? **URL:** \ **Category:** Project Development & Documentation\ **Created:** [May 19, 2022, 2:34am UTC](https://community.blackspectacles.com/t/vapor-barrier-where-multiple-types-of-insulation-are-used/4300 "2022-05-19T02:34:45Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![coachdarionziegler](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.blackspectacles.com/coachdarionziegler/32/1272_2.png) [@coachdarionziegler](https://community.blackspectacles.com/u/coachdarionziegler)\ **Post date:** [June 10, 2022, 5:21pm UTC](https://community.blackspectacles.com/t/vapor-barrier-where-multiple-types-of-insulation-are-used/4300/3 "2022-06-10T17:21:04Z")
@karen.wenschhof there was also a similar question about vapor barrier posted awhile back. You can check out that post at the link below: > [@Vapor Barrier Location](https://community.blackspectacles.com/t/vapor-barrier-location/2329/7): > > Hi @Toshea.Shouse , Yes! The rule of thumb for vapor retarder placement is to put them on the warm side of the construction! Always try to use retarder instead of barrier if you’re talking about the material that goes within the wall assembly – the vapor retarded still has a certain amount of permeability to prevent water from getting stuck in the assembly. A vapor barrier is meant to prevent all transmission of vapor and has been used colloquially to refer to vapor retarders as well. This we… Like @coachrebeccasmith said exterior plastic/papers (like in zip systems) and Tyvek, or liquid applied barriers (like in EIFS installation), are all examples of weather barriers. They stop rain from entering the building. The vapor retarder (sometimes called vapor barrier, but more accurately called a retarder) prevents moisture from entering and getting trapped in the wall due to temperature differentials between the exterior and interior, conditioned areas. It’s always installed on the warm face of the wall. Hope this helps! -Darion --- _[View the full topic](https://community.blackspectacles.com/t/vapor-barrier-where-multiple-types-of-insulation-are-used/4300)._