Liquid Chimney Flashing UPDATE

I posted this topic the other day. I hope you guys got a kick out of it. I'm pretty sure ole Jack Legge did. :laugh:

Did the work today. It turned out to be a real doozie! I got as much of the tar off of it as I could before my elbows started trying to break off. :dry:

Here's the before and after:

I was surprised to discover that the existing roof deck was 3/4 plywood. That's pretty rare around here. Most of the newer homes have 7/16 osb and the older ones have 1 x 6 etc. , half inch plywood and sometimes even a mere 3/8 plywood. :unsure:

I ended up having to scab a couple of rafters and replace the decking all the way around the chimney.

I was waterproofing chimneys long before storm guard and I/W ever existed but since it does exist today and the clients like it , I decided to use Gaf Storm Guard.

I was even more surprised when I took the old rotten decking out and found a snake skin and a squirrel skeleton. :ohmy:

I re-cemented the top of the chimney with a mixture of portland cement and sand.

I remember doing a roof for an old guy back in the mid 80's and I flashed the old brick chimney with new metal counter flashing. He wouldn't pay me when I had finished until I had "tarred" the chimney. I explained the reasoning behind the metal flashing but he wanted the metal all "tarred" and extended out onto the shingles at least 6" all around the chimney.

Well I used half a pail of roof cement and coated all the metal and made a neat square around the chimney. He was happy with the black tar on the red shingles. The roof is still there today with the square black patch around the chimney. They were BP Titelock 25 and have lasted 29 years now. No doubt longer than he did. Is it my imagination or do red shingles last longer than any other colour?

Had another job in the same red shingles on the same street that is still there too. A Chinese lady who is probably also long gone too. I remember that one also as there was a little one square 2/12 back porch that we did in black half lap. She came down the back alley and spotted the black roof and started yelling "I told you led loof, led loof, no black loof, no black loof, it unlucky I no pay until you change." We managed to find an old brittle roll of 90lb red at a builders supply close by and "tarred" it over the black half lap. She was all smiles with her toothless grin "Led loof makes rucky house"

I would like to see the building codes move up to 5/8 decking or better on all roofs but it ain't gonna happen. :laugh:

I sold a shed roof installation on new construction today. The home owner had built it himself and used 3/4 plywood for the decking. :cheer:

I often get calls about leaking wooden gable vents. The ones they built over a hole in the roof back in the day for attic ventilation. Most of these homes are decked with 1 by planks and I always just use a sheet of 3/4 inch plywood to fill the hole after I've torn the old rotten thing off the roof. It's equal in thickness to the 1 by's and just as strong if not more so. ;)

People here are too frugal to use 3/4 inch. Even on multi-million dollar homes, the best I ever get to install over is 5/8 T&G. 3/4 makes a nice solid substrate for sure, no matter how it gets oriented to the framing.

Yeah chuck I was just pulling your chain. I would have done the same thing.

Island, I used 8 seperate pieces on the counter flashing. One at each bottom and 3 up each side. It's 6 inch gutter coil.

At $40 a sheet I use what I got up before making another trip to buy more. The piece I had left wouldn't fit turned the other way. Being 3/4 of an inch thick it won't dip and won't matter.

Sounds like you'll like this other side beter:

Way back when I started to work on the roofing decks lol we did not have to many chimneys down here in Southern Florida,when we found one is usually was a surprise. Usually the chimney consisted of being made out of CBS block covered with stucco. In order to made them waterproof we would usuallu cut out the olf 26ga. l flashing and then cut in a new copper base flashing with a reglet now some folks wanted them covered up bu some wanted the copper esposed and thed we would fabricate a copper cap and flue cap it looked good to me and was wateright but the dear old cusstomer did not want to spend the extra bucks lol, most of older roof decks consisted of 1x6 or 1x8 then ther was the 1/2" plywood stretches to 30" span which caused a dipping effect, 3 tabs were king lol or the low slope used BUR w gravel evidentually after a few major storm roofing had a complete overhaul, it was fun

Looks good Chuck! Did you make the counter flashing out of one solid piece? Looks that way but its a bit hard to tell. Also, in before somebody gives you a hard time about running that 3/4" ply vertical ;)