Archive for the ‘solder’ Category

How to make a custom copper roof vent

Monday, August 17th, 2009

I’ve had a bunch of people ask me how I made the copper vent in the last post. I had to make a smaller one for the the master bath steam shower; so I took pictures along the way.

Copper vent tube

Copper vent tube

Make a tube: single lock a copper sheet into your desired diameter and length. You should remember geometry from junior high but if you don’t; multiply your desired opening by 3.14, that will be the size of your flat stock before you roll it. Since the vent tube will be in the weather make sure you solder the back seam. This one is a six inches across.

Copper vent ring

Copper vent ring

Make a ring: the protection ring will keep out wind driven rain. The outer ring should be about 2.5″ wider than the vent pipe you just made. Same as the other pipe; single lock and solder the seam.

Beaded outer vent ring

Beaded outer vent ring

Roll a few beads into the copper; it adds strength and beauty to the job.

Struts on inner vent tube

Struts on inner vent tube

Fabricate three struts to support the outer ring, these can be riveted on. Don’t forget to turn down all of your free edges; you want a place for water to drop off before it reaches the inner vent pipe. I test each vent I make, and I have forgotten to turn down the tabs, it leaks, trust me.

Outer vent ring riveted in place

Outer vent ring riveted in place

Rivet the outer ring to the struts, use two rivets per strut and the whole assembly will be rock solid. Also use copper rivets with BRASS mandrels; don’t use the phony copper rivets with steel mandrels; after the rivets are set the head of the mandrel stays behind. When it gets wet it will rust and leave streaks on your beautiful new vent. Spend a couple extra bucks and get the right rivets.

Copper cone vent

Copper cone vent

Make a cone: the cone should be at least 2″ wider than the inner vent pipe. Rivet the seam and solder.

When you make the cone be sure to leave three tabs to rivet the cap to the three struts.

copper vent cap

Copper vent

Copper vent

Ready to be brought to the job site. This vent is completely baffled; meaning it won’t leak during heavy wind driven rain or snow. Since it is made from copper it should last at least 100 years.

Standing seam copper roof and copper vent

Standing seam copper roof and copper vent

Solder a flange to your new vent a the proper angle. Clean the roof area, flux and solder the new vent flange and you are good to go.

I hope the photo descriptions helped; if its too much of a job for you or you just don’t have the time I’d be happy to make one for you.

Great material; lousy installer

Wednesday, May 13th, 2009



We are about to start a flat seam stainless steel roof on Thursday. The roof we are removing (pictured middle and bottom) to make way for new roof is also a flat seam stainless steel roof; its only seven years old and it has a fatal leak.

We didn’t install the roof; but I have tried a bunch of times to fix it and it just wouldn’t work. This roof is made up of 16″ X 22″ panels of stainless steel; each edge is turned up 3/4″ to make interlocking tiles. After the tiles are laid out the seams where each panel meets are hammered down flat. The seams are fluxed and then soldered (look at the copper flat seam roof on upper right); this method has been in use for about 600 years and is very durable if done properly. There is no reason why this roof won’t keep the building dry for the next 90 years if done properly.
You cant rush this work; it takes lots of time and in 600 years no one has found a faster way.
Look at the photos, notice anything odd? Ok, why would a stainless steel roof have rust on it? Wait, why does some of the metal look like it has gold paint on it? If you solder these panels then why do I see black tar and gray caulk?
The previous contractor used a few different types of metal on this one; we have stainless steel (dark gray), terne metal or tin (gold looking), and plain old galvanized steel (rust stained).
The mismatched metals are all in places that would be installed toward the end of the job; he probably ran short of stainless which is really expensive and grabbed any old metal he had laying around. There is approximately 1260 linear feet of soldered seams on this roof and just about half of them are cracked.
There are lessons to be learned here; but I’m tired and I have 1260 linear feet of soldering to do tomorrow.