Looking for a waterproof membrane that I can apply to a patio roof. The peel & stick that I have found are not designed to be left exposed…they have to be covered with shingles or something. I was hoping to find one that will tolerate sun and weather (no snow). Once it’s in place there will not be any foot traffic on it.
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EPDM
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Reason I asked...I paid a visit to my local Grace distributor, and they said that all of their sheet products are designed to be covered, to prevent UV degradation. The Grace Bituthatne 3000 and the Polyguard 650 would both work for my application, but the rep says no. What he recommended was a roll-on two-part product that is designed for parking garages. Roll-on the base coat, let it dry, then roll-on one or more top coats. This will work fine, but I'm still curious about the sheet stuff.
EPDM - .045 or .060 mil is common in commercial work.
Mnf: Firestone "Rubbergard"; Johns Manville "UltraGard";GenFlex EPDM; Versico (formerly Goodyear) "Versiweld"; Carlisle; among others.
You are probably looking for fully-adhered membrane (versus mechanically attached, etc). I am not sure if Grace produces an EPDM. Caution-once the adhered epdm is down, it is awfully tough to get back up (don't screw up). Comes in several sizes of rolls (7 1/2', 10', 20') Patching can usually be done similar to an old bike tire - adhere an oversized patch to the cleaned roof membrane.
You can use the multiple layer roll-on types too, check on the warranty. Also ask for info on adding layers in the future (in lieu of replacing the whole roof covering). Sometimes those systems allow you to add layers as needed, sometimes not. Also, check on how they deal with flashing conditions. They can become real headaches (during and after construction)! Also remember that most parking garages don't have to be completely weather tight (cautious skepticism never hurts with products you aren't sure about).
Either way, make sure you read and understand the mnf instructions prior to starting (especially the info about surface preparation).
Hope this helps!
Ok, are you saying that some or all of the mentioned products can be left exposed? One thing I did like about the roll-on product he recommended, it that it doesn't stick where it first touches. Well it does, but not like a membrane.
Yes, they are exposed membranes (typical EPDM). And, yes, the other system is a bit more 'forgiving' for the first time installer. Remember, look into the warranty and info on flashing details. Both of those can really impact the effectiveness of the product.
Soprema "Colphene" is a mineral surface peel and stick roofing membrane. Monsey Bakor makes something similar the name of which I can't remember.