Does metal roof need moisture barrier?
To avoid condensation buildup with your metal roof, you will need to have a moisture barrier in place. When the air in the home is warmer than the air outside, condensation will collect. If the roof system is not ventilated properly, condensation can also collect.
Which is better tar paper or Tyvek?
Tar building paper has a major advantage of self-sealing around nails provided these are driven in straight. Tyvek House Wrap is a synthetic material made by Du Pont. It is permeable to water vapour, but impervious to water. ... This make them somewhat more time-consuming to install compared to asphalt building paper.
Can I put tar paper over Tyvek?
When it gets to tar paper, Tyvek, etc… these items are not impermeable (aka *Vapor Retarders) as they allow vapor to flow through them. (*We will discuss this more in another piece on “perms”) So having two layers of Tyvek or where you place Tyvek over tar paper is allowable / should not cause issues.
Which is better house wrap or tar paper?
The main advantage of house wrap, over felt paper, is the superior strength and durability of house wrap. ... The integrity of house wrap ensures its performance in resisting air and moisture and makes it the better choice for a weather resistant barrier over felt paper.
Can I use plastic sheeting instead of tar paper?
Tar paper breathes, plastic does not. ... The plastic could cause moisture to build up between the plastic and sheeting.
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