Best Waterproof Roof/Balcony coating?

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Old 09-07-13, 10:50 PM
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Best Waterproof Roof/Balcony coating?

Don't know if this is the right section, but I have a roof/balcony that needs to be sealed with an extra layer of something to prevent water from getting in.

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I have rolled asphalt on the balcony now, but I want an additional layer of protection to prevent the little bit of water that seems to sneak in during a prolonged, hard rain. I've been looking at products from Lowes, like:

BLACK JACK 4.75-Gallon Elastomeric Roof Coating

BLACK JACK 4-3/4 Gallons Fiber Roof Coating

BLACK JACK 4.75-Gallon Elastomeric Roof Coating

BLACK JACK 4.75-Gallon Cement Roof Coating

Gardner 4.75-Gallon Elastomeric Roof Coating
 
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Old 09-08-13, 08:27 PM
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Most of the elastomeric products are not waterproof. The roof cement is good for stopping leaks if you apply it in the correct place. It is messy and cannot be walked on for quit some time. I haven't used the Fibre roof coating but that looks like it would do the job. Read the install specs to see if it will do what you are looking for. Still not sure, call Black Jack.
 
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Old 09-08-13, 09:04 PM
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Thanks for the feedback! I read all of the reviews for the BLACK JACK 4-3/4-Gallon Aluminum Roof Coating and it definitely looks like the one to use. I did the calculations and I need to cover 240 sqft. The description says one large container covers 250 sqft, so I'll probably by a 4 3/4 bucket and an additional 1 gallon container -- just to make sure.
 
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Old 09-09-13, 05:00 AM
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You might want to rethink this. The coating you intend to use works great on old metal roofs but it doesn't dry to a hard coating that would hold up to much traffic on a balcony.
 
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Old 09-09-13, 08:05 AM
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Markser, that's good to know.

The balcony is decorative. The only time someone would be walking on it is to decorate for the holidays like Halloween and Christmas. But, if you know of something better, that will provide the same waterproofing capabilities, please let me know.

At one point, I was even thinking of painting the whole balcony in Drylok, but I didn't think that would give me the protection I wanted and I didn't think it would last very long.
 
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Old 09-09-13, 12:58 PM
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I would think either the elastomeric or asphalt/aluminum paint would do ok if it's not be walked on regularly .... and it's less likely to get damaged in cold weather than in the hot summer. While I've used a good bit of the elastomeric exterior wall coatings [and was well satisfied with it's performance] I've not used much elastomeric roof coating. I doubt drylok would hold up long term on the exterior without a protective top coat - and it's designed for masonry, not roofing materials.
 
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Old 09-09-13, 02:39 PM
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Yup, I know all about Drylok, but I was getting desperate and strangely creative. For $100, I think it's worth trying out the Aluminum Roof Coating. All the reviews say it's very good at waterproofing. If I find it's soft to walk on, or can get damaged easily with the minimal foot traffic I foresee, I may work out a boardwalk or path of some sort to help the longevity of the coating.
 
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