Siding Roof Flashing Details

Roofing cad details and other resources.

Siding roof flashing details.

This standard details manual aka the blue book is the right tool to have at your fingertips. Use increased lap lengths for added protection. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. Likewise a 10 wide flashing will result in a 5 inch wide roof deck flange and a 5 inch vertical flange.

Details roofing wrb flashing two ways to flash roof edges protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. A 5 inch wide flashing will result in a 2 1 2 roof deck flange and 2 1 2 vertical wall flange. Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca. Use fasteners that are compatible with or of the same type of metal as the flashing material.

Roof and deck flashing recommendations for coastal areas always lap flashing and other moisture barriers properly. This article describes mistakes at roof dormer sidewall flashing and roof dormer sidewall coverings that invite leaks rot and insect damage on buildings. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap. Building roof dormer side wall flashing materials choices installation details specifications.

By knowing you have access to all of the right information from proper storage and installation instructions to trim and flashing details you can be confident installing your fabral materials. 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. If this is a repair job the siding must also be removed and replaced with the flashing. 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.

Click to enlarge make sure the sheathing wrap overlaps all step flashings. Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. 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. Obviously the further up the wall a flashing extends the greater the resistance to water intrusion.

Refer to the details. First step flashing must be installed before the siding so that the siding can cover the top of the flashing. One common method is to lay the edge metal under the eaves membrane and over the rake. Do not rely on sealant as a substitute for proper lapping.

Ct 07 concrete or masonry wall base flashing with a 5 course flashing system not suitable for stucco wall assemblies pdf.