Housewrap (tyvek etc)
[This message has been edited by LDoyle (edited December 13, 2002).]
Water gets behind brick, vinyl and stucco. It does, that is fact.
The idea is that you are protecting the sheathing from water, not water vapor. The wrap cuts wind but does not stop air. It is like Gore Tex is the clothing industry.
There is no wrapping school. It is a product that has put out there for contractors to use. No one has told them how to use it properly. Now whether it is used correctly is another is OUR problem. I see it misapplied constantly around here.
If you apply it so water get behind it, then you are going to have moisture problems. There are many ways to misapply this product, like any product.
Home building codes have attempted to improve energy efficiency without looking at the effects these changes make. Moisture problems are one of these problems.
Try building science .com for usefull info on home construction practices
Mold requires moisture and darkness to grow.
Housewrap does not contribute in any way to increasing moisture or darkness in a home.
As already mentioned, housewrap is an air barrier but it allows the free flow of water vapor to pass thru.
Behind all sidings you need a secondary weather barrier. The purpose of a secondary weather barrier is to prevent wind and sun borne moisture from pentetrating the siding and damaging the sheathing.
Housewrap is but one such secondary weather barrier and in fact #15 or 30 lb roof felt performs better in most circumstances. Foam boards can also be used as secondary weather barriers.
Here is a helpful link:
- 15 Old House Features We Shouldn't Abandon
- 17 Tiny Bathrooms We Love
- 30 Things Everyone Should Know
- 16 Sneaky Storage Ideas
- 20 Easy 60-Minute Home Improvements
- 10 IKEA Favorites Made New with Paint
- The Tiniest Appliances You Never Knew Existed
- 9 Alternative Uses for Toothpaste
- 133 Smart Storage Ideas for the Whole House
- 16 New Ways to Store Kitchen Necessities
- 8 Ways to Make a Small Room Look Big
- 21 Expert Picks for Fail-Safe Colors
- 10 Fall Door DIYs for the Best House on the Block
- The Cheapest Ways to Boost Home Value
- 10 New Uses for Old Doors
- 26 Easy Painted Pumpkins for Halloween
- 15 Once-Popular Home Items Now Vanishing
- 8 Unique Ways to Build Your Own Table
- Woodworking for Beginners: 10 Projects
- 7 Reasons to Reconsider Wallpaper
- 10 New Uses for Old Dressers
- 7 Upgrades You Can Do in Under 300 Seconds
- 10 Thrifty DIY Ways to Organize Your Home
- 12 "Different" Ways to Store Firewood
- 17 Creative Ways to Repurpose Cardboard
- Beyond White: 11 Bathroom Paint Colors
- 10 DIYs for a Festive Front Door This Fall
- 10 Creative New Ways to Use Old Bottles
- The 10 Best Things to Buy Secondhand
- 16 Must-See Coffee Tables You Can DIY—Easily!