Metal Roof Valley Flashing Detail

The top joinery of both valleys when they meet on the same plane of roof is shown here.

Metal roof valley flashing detail.

Metal roofing panels are slippery when wet dusty frosty or oily do not attempt to walk on a metal roof under these conditions. Valley flashings are custom fabricated to any measurements and angles and usually measure 10 in length but can also be bent in 12 lengths. Longer slopes and lower roof pitches contact fabral for other suitable profiles. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed.

Special pricing available for large quantities. Metal should not be re bent once it has been formed. Always be aware of your position on the roof relative to any roof openings roof edges co workers and penetrations. Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies 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.

How to secure metal roof valley by clips cleats or edge trapping roofing nails. 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. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Bending and bowing aluminum and steel roofing and siding sheets are rollformed from hardened tempered metal for maximum strength.

Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. The installer fabricates simple clips or valley flashing cleats whose bent edge interlocks with the folded over or hemmed edges of the metal roof valley flashing to secure the valley to the roof deck. If a sheet must be bent a gentle 90 degree bend is the maximum recom mended. Riverside provides roof valley flashing for general contractors roofers and do it yourself home owners.

Use roof valley cleats at intervals of 24 o c. This valley flashing material can be manufactured from any metal that will resist the effects of weather. Since this was an introductory guide to the basics of standing seam metal roof installations we purposefully left out more technical details such as z bar flashing end wall and valley flashing details however they are covered in the video above if you like to learn more about the components that go beyond the basics. Wear soft soled shoes to improve traction and to minimize damage to the paint finish.

What is an open valley roof. In comparison to a closed valley an open valley adds another layer of lining into the valley.