Roofing - Peel & Seal Roll Roofing

[NWOhioChevyGuy]

So I have a flat roof that my garage build mates to at the house. Roof is roughly 22' x 22'.
It was installed around 1915 and is metal "shingles" stitched together, roughly 12"x24", seams are flat and I suspect starting to fail, as I see no punctures that would be causing my leak. I was up there this weekend with some left over peel and stick flashing tape to seal it up and am not certain I have it in the right spot. (yes a temporary fix)

I have the garage flashed and sealed nicely to the roof, however I have a slow leak at some place in the field of the roof.
When we bought the house I mopped on a roof coating, and that has started to fail. (14 years ago)

Has anyone had experience with Peel & Seal? https://www.mfmbp.com/peel-seal
Inexpensive and quick - Not something that I ever really think of as going together on a quality product.

I was looking to do a full blown insulation board and rubber roof, however it is quite expensive and getting it done as a DIY would be difficult as this is a second story roof.

Reviews look awesome on Lowes.com and I have one friend who has used it in the past on a smaller project w/ good results.

 

[speed bump]

We have used some on random projects. If you do good prep work and pay attention rolling it down then it works well, if not then not so much.

 

[rancherbill]

I have no knowledge or experience with this product.

My thought is that Michigan has heat / freeze cycles and the lower original metal roofing will expand / contract. These old "shingles" might not be the best surface. ??? Maybe a layer of plywood???

 

[NWOhioChevyGuy]

Here is a pic of the roof, the “shingles” are completely smooth and seams mechanically “folded” together. I don’t think the temp change will cause dimensional issues.

 

[budget76]

I am interested to hear as well. I've got a very low pitch roof that's currently the peel and stick style roofing. Going to have to redo it sooner than later, watching this thread for input

 

[NWOhioChevyGuy]

I will likely have to wait until spring, as cooler temps have set in here.
From what I see it is best to install this type of product on a warm 70+ degree day for adhesion.

 

[mattmountz94]

I would be concerned about the paint coating on the existing shingles peeling and then the peel and stick roofing becoming delaminated. If you power wash that roof really well, will the coating come off leaving the original paint/finish. If so then I would think you could install the peel and stick. I personally would mechanically attached a 1/2" insulation board through the existing shingles into the wood below. Then install fully adhered Black EPDM. Another thought would be to install an exposed fastener corrugated metal roof directly over what is there. Screw into the wood below. Would have to think about condensation though.

 

[gmcgeo]

i agree with the .060 EPDM then yellow glue it to the substrate. will not need the 1/2" fiber board. then seam tape the edges.


however you wont like rubber prices right now

 

[NWOhioChevyGuy]

I was planning on a EPDM roof w/ insulation board. Rubber is out of the budget currently

 

[gmcgeo]

yeah, i will be out of rolls of rubber in the next month and wont have any coming until feb. with a 7% increase expected

 

[billconner]

I used a product called (iirc) Hypsum for a flat roof based on an article in JLC. It was fine for 25 years when we sold house. Can't find it on line. Very thick and tough peel and stick. I believe it was intended for bridge decks. I dont know but thought or guessed between a base deck and a wearable deck.

BITUTHENE looks similar but not sure. Looks less than a buck per square foot.

 

[CraigStu]

Is there any way you could put even a low rise roof on there. Any angle is better than flat and level.

 

[NWOhioChevyGuy]

It has some pitch to it, but very little.

There is always a way with the proper budget.
The architect drew it up with a whole new roof structure to match the house, NOT in the budget.

It has worked this way for 100+ years, don't think I will be changing it.

 

[Forgottonia]

I have that same roof on my sunroom. House built in 1915. No leaks yet. But I'm very interested to see how you handle this.

 

[oldmxracer]

Mop it again with some kind of sealant till You can budget some fiber board and a glued down EPDM roof!

 

[rancherbill]

I used a product called (iirc) Hypsum for a flat roof based on an article in JLC. It was fine for 25 years when we sold house. Can't find it on line. Very thick and tough peel and stick. I believe it was intended for bridge decks. I dont know but thought or guessed between a base deck and a wearable deck.

BITUTHENE looks similar but not sure. Looks less than a buck per square foot.

Bituthene is as you described, but it is not described for roof applications. I love the stuff. I did out foundation with it. There is a small portion exposed to the sun and it has deteriorated.

This is the roofing products from Grace who make bituthene

GRACE ICE & WATER SHIELD® Roofing Underlayment | GCP Applied Technologies

GRACE ICE & WATER SHIELD roofing underlayments protect roofs from the damaging effects of water.

gcpat.com

 

[billconner]

What I used was much thicker and stiffer than the Grace ice and water. Pretty sure Hypsum was the name. As I said, still fine after 25 years, exposed to sun.

 

[finn]

Is there any way you could put even a low rise roof on there. Any angle is better than flat and level.

I ended up doing this last summer on a (formerly) flat roof. Best I could do was 2/12, but I figured that was better than flat.

I used ice & water guard and regular shingles. Works so far, but I don’t have much optimism that it will go thirty years.

The big White Pine overhanging the roof and dropping needles doesn’t help.

 

[ddawg16]

I used a peel and stick roof on the awning over my back patio.

2 part system....underlayment....sticky on one side.....and then the peel and stick outer layer.

But my awning has a slope to it.

In the OP's case....some slope would really help.

 

[rancherbill]

What I used was much thicker and stiffer than the Grace ice and water. Pretty sure Hypsum was the name. As I said, still fine after 25 years, exposed to sun.

I looked on Google and I cant see Hypsum.

 

[billconner]

Neither could I. It was 25 years ago as I noted. It was like leather and tough to unroll when cold. Pretty sure it was for bridge decks and was recommended for rooftop decks in JLC article. I worry I am miss-spelling it.

 

[billconner]

May have been Hypsam, which seems to be a discontinued product made by Hyload.

Found this:

Waterproofing exposed deck with finis... - Fine Homebuilding

* Anybody got any good ideas on how to waterproof a plywood deck floor that is exposed to the elements, but has a finished ceiling below?? The decks in question […]

www.finehomebuilding.com

I think I might have posted message #3. And I find "kwik ply" at Hyload site but not much. Was called Hypsam.

 

[Bert_]

That looks like it was originally a soldered tin roof. A while back I read about "acrymax" being used to coat that type of roof that was in poor condition. I'm sure there are other brands also

 

[NWOhioChevyGuy]

I will have to take a level up there next time, there is some pitch to the roof, just not much of it.

I agree insulation board and EPDM is the best roof for this, just not in the budget at this point.

If at some point in the future it is I can always put that over this rolled peel & stick product.