||Self-draining Sill Pans
Drain water, don’t trap it. Use sloped sills, back-dams, or both to make sure standing water doesn't rot out your framing.
||Sill Pan Flashing Options
Pre-formed or site-built, pan flashing channels water out where it won't rot the sills under windows or the floors under doors.
||Sill Pan With Regular
Learn how to work with nonflexible peel-and-stick membrane to make a sill pan.
||Sill Pan With Flexible
This type of flashing is very easy to use, but it’s more costly than the straight nonflexible flashing.
||Flashing Flanged Window Jambs
On foam-sheathed walls, there is no housewrap to cover the flanges. Learn how to use peel and stick, housewrap strips, or pieces of roofing underlayment to protect the framing.
||Flashing Pre-Cased Jambs
Flashing windows with pre-applied trim can be tricky. Two good choices are site-built butyl-tape flashing and pre-made double-sided flashing membranes.
||Head Flashing Windows/Doors
At the top of the window, Mike uses peel and stick membrane to do the weather-sealing, and copper flashing for extra protection and good looks.
||Counter-Flashing The Head
With foam sheathing, there's often no housewrap to tuck the head flashing under. Mike's come up with a smart way to slip metal flashing into the foam.
For Pros By Pros: Exterior Siding, Trim, and Finishes
Essential Design and Installation Information From the editors of Fine Homebuilding. buy the book
Shop all Books and DVDs
Mike Guertin has been a Fine Homebuilding contributing editor since 1996. A builder and remodeler from East Greenwich, R.I., Mike is constantly testing new ideas and writing about his experience to help make our homes better and our jobs easier.
FURTHER RESOURCES ON FineHomebuilding.com
Flashing Replacement Windows
This nearly fool-proof method makes sure that even leaky windows won't funnel water into your home
Installing and Flashing Windows Correctly
Making Sense of Caulks and Sealants
Siding alone doesn't stop water, so housewrap, sill pans, and flashing tape are essential for watertight walls
Today's products adhere better, stretch farther, and last longer, but choosing the best one is harder than ever
Flashing Windows in Rain-Screen Walls
Foam sheathing and furring strips make the wall thicker; Make sure the sill can drain and the head is tight
The Inspector Game:
Flashing a Window's Head Casing
This flashing method might seem excessive until that first big driving rain
Leak-Free Window Installation
Leaky windows waste energy and rot houses
FROM GREEN BUILDING ADVISOR
BUILDING SCIENCE PODCAST:
The Perfect Wall, Roof, and Slab
Dr. Joe Lstiburek talks about enclosure design principles of durable, energy efficient houses
When Walls Have Exterior Foam, Where Do the Windows Go?
How to decide whether to install windows towards the inside or the outside when building thick walls
Windows, Glass, Ratings, and Installation
Good windows are essential to energy conservation and comfort
Choosing Triple-Glazed Windows
How to compare the most important window specifications: U-Factor and solar heat gain