How do you flash a chimney on a corrugated metal roof?

How do you flash a chimney on a corrugated metal roof?

Cut the bottom of the sidewall flashing at 45 degrees and the top such that it will bend around the uphill side of the chimney. Slide sidewall flashing into place and fasten into the chimney with masonry anchors. Repeat sidewall flashing on opposite side of the chimney.

Does roof flashing go under shingles?

All shingle manufacturers require step flashing at sidewalls for both asphalt, wood and slate. ... Instead of installing the step flashing between shingles, the flashing rests on top of the shingles. It's not unusual to see sealant installed when sidewall flashing is missing.

Where should Flashing be used on a roof?

Roof flashing is a thin material, usually galvanized steel, that professional roofers use to direct water away from critical areas of the roof, wherever the roof plane meets a vertical surface like a wall or a dormer. Flashing is installed to surround roof features, such as vents, chimneys and skylights.

Is drip edge flashing necessary?

Without a drip edge, water may end up beneath the shingles and may cause damage to various parts of the home. Though your home may not have originally had a drip edge installed, drip edges are now required by most building codes across North America to protect homes from damage.

Does drip edge go under felt?

It depends on where the drip edge is. At the side, or gabels, of a roof, the drip edge goes over the roofing felt. At the bottom of the roof, the drip edge goes under the roofing felt.

Do you need to put tar paper under a metal roof?

The simple answer is yes, your roof does need an underlayment. ... If your metal roof is going on top of asphalt shingles, then there is already an underlayment, and it likely doesn't need another. Keep in mind, however, that expansion and contraction of the shingles could cause damage to the back of the metal over time.

What should you put under a metal roof?

The traditional and most common material used for roof underlayment on a steep-slope metal roof is non-perforated, asphalt-impregnated felt underlayment. There are several types of felt underlayment including both organic reinforced and inorganic reinforced.