Flat roof repair

[AZ Pete]

I am a long time lurker, and have truly enjoyed learning from the forum members here.

My patio roof has very little slope to it, and the lowest edge has some leakage, I think. At least the rool roofing has pulled back from the drip edge about 1/8 or so. I would like to re-seal this with something like self-leveling caulk.

What is a good product fot this, that is commonly available. i don't want to create a dam, just seal the gap to assure it is water tight.

Thanks for the help.

 

[Zeke]

Meanest **** I have seen and used is called Flashmate and you can get it at HD. The joint needs to be fairly clean and dry to use. Other than that, Henry's makes a couple of products that work well. But try and cut that Flashmate a week later!

Don't know about 'self-leveling'. A putty knife does that job.

 

[csp]

What is the roofing material?

 

[AZ Pete]

Looks like regular 90# fiberglass roll roofing to me, but one roofer called it rubber. The surface is mineral, just like fiberglass shingles.

I should add, it is not nailed down, so must be installed with adhesive, whether it is a "peel and stick" or something else. The roof is 19 years old, so whatever it is, it is pretty good at enduring central Arizona heat, as it is on the south side of the house.

 

[steveivy]

AZ Pete,

Sounds like you have what I have on my new roof, a rubber rolled roofing that has a asphalt/like cap sheet. Mine was installed in two layers, both peel and stick: a bottom rubber later that the flashings get applied and patched over, then the second cap later is applied over everything.

Based on the age of the roof I don't know what it will require, but I have a good and cheap guy who can help. I'll pm you the deets.

--Steve

 

[AZ Pete]

Thanks Steve.

 

[BlackTalon]

Based on age it may have been torched on. The guy may have said "Rubberoid", which was the brand name of one torch-on mod bit membrane. Self-adhering mod bit sheets are relatively new, so I would be surprised if that is what is on the porch. Hard to tell without pics, though. Likely can reseal that edge with a decent-quality asphalt-based roofing/flashing cement. Someone above mentioned Henry; they have a few suitable roofing/flashing cements, and some that may be available at HD, etc. Clean as well as you can and apply with a trowel. A 'self-leveling' product is not the best for what you are trying to repair.

 

[slip knot]

I applied a "mulehide" product to my MIL flat roof. it is a stick down product and has a mineral cover on it. Seemed like a pretty sweet alternative to hot mopping a multi layer roof on. We'll see how it holds up tho.

 

[AZ Pete]

Thanks for all the help, I will be off to HD or Lowes on Monday

 

[matt_i]

Just an alternative, if you can slip another sheet of metal under there (no idea if even feasible, if there is a space that would accept the metal edge, etc) but that will also definitely help keep water out. It could be a trim coil that you buy if a long span...ideally would match the siding or roofing as to not stick out. Under the roofing and over the drip edge.

 

[AZ Pete]

Thanks Matt, I don't think that the adhesive has failed, the edge of the roofing is just pulled back from the edge of the roof a small amount, but still covers the majority of the drip edge. I will just fill that void to prevent water from standing there.

 

[straightcut]

Roofing is not my trade, but I think here in Arizona they call it a torch down modified bitumen or just "torch down". Anyone correct me if I'm wrong because I'd like to know for sure as well. Some of the others from other areas used nearly the same terms, so we're probably all talking about the same material.

 

[lamywaby]

I am a long time lurker, and have truly enjoyed learning from the forum members here.

My patio roof has very little slope to it, and the lowest edge has some leakage, I think. At least the rool roofing has pulled back from the drip edge about 1/8 or so. I would like to re-seal this with something like self-leveling caulk.

What is a good product fot this, that is commonly available. i don't want to create a dam, just seal the gap to assure it is water tight.

Thanks for the help.

also check this out Golden Tree Roofing

Am going to repair a friend's flat roof. I've not seen it yet but am expecting it to be old, cracked roof felt. I've seen various YouTube videos recommending bituminous paint and fibreglass mesh, but I can't find mesh on Screwfix website or the obvious competition. If its just small cracks, I guess I could use plastering scrim (I have some already) or just seal with bitumen alone. Is mesh patching not common, or am I searching for the wrong product?

 

[dogdog]

you use flashing cement for those crack and seams.. if your roof is MorBid or tar , you can also use that or the special morbid cement but lot more expensive per bucket..

I have always used this along with the fiberglass mesh.. they sell them on the same isle/area either black color or just white/clear fiberglass.

a pair of cheap dish washing glove double layer it, and a throw away notched trowel and a regular trowel if you need to stick it in some area.

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[lamywaby]

@dogdog thank you so much for your suggestion. really appreciate that.