High-performance builder Ben Bogie presents a few mental visuals to help understand that elusive moisture menace.

The water-impermeable layer beneath the siding protects walls from rain and snow, and often functions as a building's air barrier.

A look at some of the most time-tested, well-known brands and some of the newest products to hit the market.

The easiest and most economical place to waterproof a basement or crawlspace is on the outside, but there are reliable interior solutions too.

These construction details can improve the durability of exterior walls by allowing rain and moist air to escape from behind your home's siding.

Building paper is still widely used, but waterproof shingle underlayment is a popular choice for valleys and other leak-prone areas.

Proper preparation goes a long way toward preventing leaks.

Roofing contractor Dyami Plotke explains the best way to install rake and eave flashing.

The first rule of roof flashing is that water runs downhill; the second rule is that the first rule isn't without exceptions.

Counterflashing overlaps base flashing to repel water along the chimney/roof line.

Back up roof vent boots with flashing, counterflashing, and proper shingling to prevent leaks.

Looking to save money? Have custom lengths of aluminum gutters rolled out on site, and get out the ladders.