Tech Tips – Vertical Seams on Standing Seam Metal Roofs Do Leak!

Over many years of working with contractors that restore leaking metal roofs, we have learned that vertical seams on a metal roof can be the root cause of roof leaks. Since most traditional style panels are designed with a crimped seam of 3” or more above the panel, it seems counterintuitive that these seams can cause problems. Sometimes, these seams are not properly sealed when they are originally installed. Another issue is some commercial AC systems create negative pressure in the building literally pulling in water from the roof. 

Oftentimes, contractors make the mistake of caulking portions of the vertical seam but not the entire seam. If you address any portion of a vertical seam, you must go to the ridge of the roof or you will potentially create a dam effect. 

In most situations, there is not a coating or caulking fix to the problem. The seams need to be properly crimped. The hand crimpers below are designed and manufactured by D.I. Roof Seamers of Corinth, Mississippi. Use the information provided to research which option is best for your next project, or visit www.diroofseamers.com to learn more.

If the vertical seams are an issue, these crimpers should be used before installing an American WeatherStar metal roof restoration system. Met-A-Gard or Met-A-Sil  are our systems designed for restoring and sealing leaks in metal roofs. The Met-A-Gard system is 100% acrylic resin technology while the Met-A-Sil system uses a moisture curing urethane and silicone to seal metal. Please call American WeatherStar Technical Services at 888-868-2317 for more information.

 

Hand Crimpers from D.I. Roof Seamers


  

Stand-Up 90° Hand Crimper

D.I. Roof Seamers 90° Stand-Up Hand Crimper is manufactured from high quality steel and cast bronze, to provide you with a quality 90° seam. Being approximately 36″ tall and having a compound leverage action, this is a well crafted alternative to our popular 90° Hand Crimper, allowing the roofer to crimp panels from a standing position. Because of our compound leverage action, this Stand-Up 90° Hand Crimper is ideal for those difficult to reach locations that a standard 90° hand crimper cannot reach.

D.I. Roof Seamers90° Stand-Up Hand Crimper


  

90° Hand Crimper

D.I. Roof Seamers 90° Hand Crimper is made from high quality steel, these hand crimpers are engineered to give you years of use. Available for rental or purchase, this tool is easy to use and is designed to produce a quality seam every time.

D.I. Roof Seamers90° Hand Crimper


  

180° Hand Crimper

D.I. Roof Seamers 180° Hand Crimper is used with the 90° Hand Crimper, this tool will complete the final stage in preparing the seam for your roof seamer.

D.I. Roof Seamers180° Hand Crimper


  

2-Stage Hand Crimper

D.I. Roof Seamers 2-Stage Hand Crimper is two hand crimpers in ONE! This tool allows you to complete a 90° and a 180° crimp without changing tools. Ergonomic handles allow ease of use with durable steel construction. Contact surfaces are coated to protect roof panel finishes without marring or scratching. Available for specific roof systems only ─ please specify your roof manufacturer and panel style when ordering to verify compatibility.

D.I. Roof SeamersT-Style Hand Crimper


  

T-Style Hand Crimper

D.I. Roof Seamers T-Style Hand Crimper is designed for use with T-Style structural standing seam panels, this hand crimper is an effective way to achieve a symmetrical and uniform appearance. Ergonomic handles allow ease of use with durable steel construction. Contact surfaces are coated to protect roof panel finishes without marring or scratching. Available for specific roof systems only — please specify your roof manufacturer and panel style when ordering to verify compatibility.

D.I. Roof SeamersT-Style Hand Crimper

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