TECU Master Seams: a primer in metal roof seaming

There is very little information in english on traditional metal roofing. This is what prompted me to begin studying seaming, and publishing the metal roofing bible in 2018 after years of study and work in this field. I found all of the American resources lacking in this department, and most of the leaders in the field of historical roofing in America lacking in their knowledge of time-honored methods for folding and seaming. This short brochure is one of the few examples that show basic seaming techniques.

Although it does not offer instruction on how to create patterns for unique situations, it gives the reader the basics of the “knots” used to accomplish different details in metal roofing without cutting, soldering, or sealants. These techniques allow the roofing elements to be free-folded, and more importantly it allows the roof to be repairable in the future without disrupting the entire assembly. This is not possible with american flat-lock methods where pans are soldered together creating a monolith.

Universal Sheet Metal Pattern Cutter, VOL2

“Surface development” or “surface pattern making” is the process of creating a 2d pattern for any shape that will be formed out of sheet material to create a 3d assembly.

The skills of surface development pattern making are important for decorative sheet metal, historic preservation, metal roofing, and copper work. Learning how to develop a pattern for any shape you would like to create can be useful for larger architectural forms as well.

One of the techniques used in pattern making is called “parallel line development”. This skill is vital for creating notching patterns for standing seam roofs.

The book, along with many other primary sources are hosted at The APT Library at the internet archive.

hip patterns series 4:12 and 6:12

Over my time in the shelter from November, thru the beginning of February, I worked on these hip patters. These are useful for creating folded hips on a standing seam copper roof, although any light gauge material that will not rust can be used. Eventually I will get them all scanned and available on an index page. One-off patterns are always available. Contact for metal roofing design and pattern work!

Print out the PDFs and align to the un-formed pan end.


Print out the PDFs and align to the un-formed pan end.


Print out the PDFs and align to the un-formed pan end.


Print out the PDFs and align to un-formed pan end