Siding Roof Flashing Details

Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. First step flashing must be installed before the siding so that the siding can cover the top of the flashing. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies.

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Building roof dormer side wall flashing materials choices installation details specifications.

Siding roof flashing details.

All flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle. Technical fact sheet no. Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca. Siding details at roof wall joint step flashings to avoid rot.

Deck joist ledger spacer behind ledger housewrap or building paper housewrap or building paper exterior sheathing flashing drip edge z flashing 2 z flashing 1 deck board siding gap for drainage. Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof. This article describes mistakes at roof dormer sidewall flashing and roof dormer sidewall coverings that invite leaks rot and insect damage on buildings.

Our wall siding photo above right shows the beginning of deteriorating wood clapboards that were installed touching the surface of an abutting lower asphalt shingle roof. 23 roof to wall and deck to wall flashing home builder s guide to coastal construction page 3 of 3 figure 3 deck ledger ﬂashing. Stop wood sidings at least 1 inch short of the bottom leg at step flashings and other roof flashings. Click to enlarge any image otherwise water will wick up into the flashing leading to paint failures and decay see figure 1 6 above left.

If this is a repair job the siding must also be removed and replaced with the flashing. The vertical flange of the flashing is to extend up behind the adjoining siding. Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to al low flashing laps to face away from wind driven rain. Ct 07 concrete or masonry wall base flashing with a 5 course flashing system not suitable for stucco wall assemblies pdf dwg ct 08 steel or wood stud stucco wall with z bar.

The roof deck flange of step flashings are to be fastened to the surface of each shingle in a position whereby the next course of shingles will cover up hide the flashing from view. Refer to the details.