Hot asphalt question. Coated but still cracked.

There ya go :)

Just good ol' type III & rock/gravel.....

The closest we ever came to something like that was 25+ yrs ago with the Henry's emulsion & chopped glass.....That actually added some life to an older roof. But it was understood by all that is was strictly a prev. maint/ procedure of sorts, and not a stand-alone roof system.

TomB: No offense taken. Sure I took a hit to my pride just posting this, but that's part of the learning process.

I'll be making it right to this customer when they get ready for a tearoff. I'm sure glad I didn't do it for anybody else!

Tom was that done with hot, or the "miracle in a can" resaturant so dearly loved by Tremco and garland

I say this with guarded caution as I intend no offense.

Years ago, upon our relocation from the left coast to Colorado, I ran into/was introduced to the "Flood coat & gravel" phenomenon. IMHO; Through a combination of contractor naivety as well as 'shysterism', it was an accepted practice.

I would educate the customer whenever the request came up. And yes, we roofed a lot of them for disgruntled clients, as they thought they had received a new roof.

I guess I've heard of it being done. Only seen one that I know it was done. Didn't last 2 years, and we roofed it in year three. Sure made a mess out of things cuz they used type 1 and it was still soft.

The only way I've seen it be remotely effective without ply added is by casting gravel back into it.

While I've heard "flood coat", "Flood coat & gravel" is the only way I've heard it frequently among the old-timers.

It wasn't dead level, MAYBE 1/4" though. Doesn't pond much at all. Three crews I know of used to routinely flood buildings ever 3-5 years. I assumed it was an okay practice just to buy this customer a few more years. Not surprising that the status quo around here is not up to par. I should have researched myself but my head was probably thinking OSHA during study time.

I do appreciate the input from all of you - Trying to get a little better everyday but I've got to take a step back once in a while.

A little more info if your on a flat deck you have to use the right asphalt either dead level or flat, rule number 2 you never leave the asphalt uncoated it will crack, and btw asphalt according to the asphalt association is an adhesive designed to hold 2 or more pieces of felt together, had you sprayed an aluminium coating over the top of the glaze coat you might not of had those fissures in the coating however when you do something not according to the rules things happen B)

TomB Said: Maybe Im missing something here, but Ill go ahead & state the obvious.

The asphalt is the waterproofing agent. An very simplistic analogy could be compared to repairing a bicycle inner-tube, whereas one would apply the glue but not the patch.

Dave, Deep Down In Florida Where The Sun Shines Damn Near Every Day the UV from the sun effects on asphalt Drying it out,breaking it down till large alligator type cracks appear. Theses cracks will cause deep fissures. Here it requires a membrane to hold the asphalt together .

B) :) :) B) Deep Down In Florida Where The Sun Shines Damn Near Every Day

I see what your saying, but I've seen many folks just flood a roof for maintenance. I'm guessing that's not a best practice?

Funny part is that I research the hell out of everything I do if I'm a bit unsure. I didn't crack the manuals on this one. :blush:

Maybe I'm missing something here, but I'll go ahead & state the obvious.

The asphalt is the waterproofing agent. An very simplistic analogy could be compared to repairing a bicycle inner-tube, whereas one would apply the glue but not the patch.

Egg: I'd like to see that stuff in person someday. I'm not aware of anybody spraying that locally. Also, pertaining to the cool ambient temperature, I may have interpreted that wrong. Temperature vs "not HOT"

Mike: Isn't that unfortunate. I should have guessed knowing other asphalt products. Two local supply houses said that's all they sold, but its the same type we maintained buildings with in the 90's.

I wouldn't have done it but it was for a good client....who will be getting a great credit towards an EPDM roof! I have been trying to sell floods since, I'll probably knock that off for a bit.

Regardless, steep is not the right thing.

But here's more of what's probably going on.

Asphalt was once the left-overs of the refinery process.

There was a lot of good stuff in the bottom of those refinery stills.

Today, that process has evolved to suck every useable ounce of marketable product out of the oil. Mod-bit manufacturers, at least the better ones, now must have their asphalt specially formulated to their spec in order to get a product suitable for a long term roof.

This is best a practice you walk away from in the future, or if you must, at least do it with an asphalt with a little more flow and healing properties.

I mean, even Karnak 19 doesn't last long without some fabric in the mix.

It was 95+ degree's outside. Nice and toasty plus some, I enjoyed it.

That's the type of situation Tim's emulsion would be better for. When it cools down, hot is very very crispy in cold ambient temperature. Probably bad adhesion down inside all the alligator cracks and a few expansion cycles later they've telegraphed through the new glaze coat. Just a guess.

Correct. Steep 4 I think. Could have been 3, not quite sure - I'd have to check. Not on the supply invoice and I can't quite recall. I'll check out the yard tomorrow.