Use step flashing that has a 2 to 4 inch longer vertical leg than normal.
Flat roof to wall flashing detail.
The flashing extends up the wall at least 4.
Same type of metal as the flashing material.
N use step flashing that has a 2 to 4 inch lon ger vertical leg than normal.
Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof.
The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.
Do not seal housewrap or building paper to step flashing.
Quality of a finished installation is dependent on good detailing.
N at roof to wall intersections see figure 1.
The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high.
3 12 flashing large roof penetrations 17 3 13 flashing small roof penetrations 19 3 14 expansion 20 3 15 standard roof flashings 21 3 16 non standard roof flashings cappings 24 3 17 box gutters 25 3 18 barge gutters and capping 26 4 0 typical wall flashings 27 4 1 cladding orientation 27.
Roof wall flashing architectural detailing this design guide has been prepared to assist architects and architectural draftspersons with the design and installation intricacies of detailing roof and wall flashing for metal cladding.
This collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs right in the real world.
At roof to wall intersections see figure 1.
N tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
Flashing is installed to surround roof features such as vents chimneys and skylights.
N use flashing cement at joints to help secure flashing.
Lead flashing maximum length.
Size up the job.
Ideally this should be 150mm or a minimum of 75mm again common sense and exposure applies.
Flashing joints are lapped 6 in the direction of water flow.
