Pro Building Tips: Flexible Window Flashing Cuts Moisture Penetration
If window flashing isn't installed correctly, water can leak behind the window and get into walls. New flexible window flashing products now on the market significantly reduce the potential for moisture penetration around windows.
Installing windows can be tricky. Try it without knowing how to do it right or skip a step, and you run into problems. At a minimum, the warranty will be invalid if the window isn't installed to the manufacturer's specifications. More seriously, if the window flashing is not properly installed, rain water can leak behind the windows and enter walls, where it has the potential to seriously damage the home. Moisture intrusion can lead to mold growth, a cause of unhealthy indoor air. It can also lead to wood rot, which creates structural problems.
A recent paper from the Energy and Environmental Building Association reports that up to 20 percent of all windows leak water. If that's hard to believe, remember that windows are just components assembled from individual elements that are susceptible to leakage at joints.
And if the window itself doesn't leak, most exterior sealants around windows eventually fail. New flexible window flashing products now on the market significantly reduce the potential for moisture penetration around windows.
Good window-flashing techniques must be integrated with the wall moisture drainage plane and can vary by climate. When choosing a flashing material for a northern climate, check product specifications to understand any installation limitations the flashing may have during cold weather. For example, the flashing may only provide good adhesion above a certain temperature or may require additional fastening.
For hot and humid climates, the following six steps illustrate the preferred method of flashing windows for a home with housewrap and plywood or OSB wall sheathing:
Following these steps will minimize the potential for moisture intrusion and contribute to a quality home. Planning for frequent inspections is also important to ensure the windows are installed properly.
For more information visit:
This information is taken from Building America's Builders and Buyers Buyers Handbook for Improving New Home Efficiency, Comfort, and Durability in the Hot and Humid Climate, one of a series that focuses on best practices for all U.S. climate zones. Building America's system design recommendations and process improvements can help all builders interested in re-engineering their home designs to achieve high performance. This best practices handbook helps builders develop durable, comfortable homes that achieve 30 percent energy savings in space conditioning and water heating in hot and humid climates. The handbook contains chapters for every member of the builder's team — from managers to site planners to designers, site supervisors, the trades, and marketers. There is also a chapter to help homeowners select the best systems for their new home.
Peel-and-Stick Window Flashing
By using peel-and-stick window flashing instead of caulk, you can increase protection from the weather for years to come.
Technology Makes Windows Smarter
Innovations will bring the next wave in energy efficiency to home windows.
Choosing and Installing Replacement Windows
Compare the pros and cons of partial versus full window replacement.
Energy Efficient Window FAQs
Get to know these key terms before buying windows, doors and skylights.
Framing Windows With Less Lumber
Optimum value engineering permits framing windows with fewer studs while keeping the structural support of the window frame.
The Best Window for a Mixed Climate
One size does not fit all, at least when it comes to weather and windows.
Choosing Energy Efficient Windows for Your Home
Consider these four factors that can affect a window's performance.
How to Read a Window Energy Efficiency Label
Do the homework when it comes to all those codes and numbers on window energy-efficiency labels.
Glass, Glazing and Gas: 3 Factors of Energy Efficient Windows
Advanced window technology can minimize heating and cooling costs.
Finding the Source of a Window Leak
Here are some tips on keeping windows watertight.
This or That: Pick Your Favorite Vintage Find From Fixer Upper
HGTV Design Blog – Design Happens Aug 27, 2015 by Farima Alavi
6 Essentials for the Perfect Tailgate Party + Win the 1 Thing You Really Need
HGTV Design Blog – Design Happens Aug 25, 2015 by Farima Alavi
Discover the Winning Hue in Our Color Vs. Color Competition!
HGTV Design Blog – Design Happens Aug 24, 2015 by Kayla Kitts
Copy This Room: Get Beach Flip Style in Your Living Room
HGTV Design Blog – Design Happens Aug 24, 2015 by Shannon Petrie
4 Ways to Personalize Your Dorm Desk + College Goodie Giveaway!
HGTV Design Blog – Design Happens Aug 21, 2015 by Farima Alavi
The Easiest (and Cutest!) DIY Dorm Roommate Mugs Ever
HGTV Design Blog – Design Happens Aug 20, 2015 by Marianne Canada
Dorm Room Ikea Hack: Turn a Shelf Into A Storage Coffee Table!
HGTV Design Blog – Design Happens Aug 19, 2015 by Marianne Canada
Back to School For Adults: 10 DIY Office Refresh Ideas
HGTV Design Blog – Design Happens Aug 19, 2015 by Chelsea Faulkner