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Old 09-23-2014, 02:54 PM   #1
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Caulking?

I am starting to winterize my 28DSBH and have noticed some areas along the corners of the exterior walls that could use some caulking. What kind do most people use? I did the roof with self levelling already.
Thanks.
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Old 09-23-2014, 02:57 PM   #2
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Butyl tape
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Old 09-23-2014, 03:12 PM   #3
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Butyl tape
+1 for the corners. BTW, loosing a good seal in the corners is what my nightmares are made of, it seems so hard to inspect them visually.

Proflex RV caulk is what I will use for all other vertical sealing needs (around lights, etc...)

http://www.amazon.com/Geocel-28101V-...=proflex+caulk
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Old 09-23-2014, 03:54 PM   #4
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When you guys are re-doing the self leveling sealant on the roof, are you just slopping more on top of what's already there? Or do you remove the old stuff first?
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Old 09-23-2014, 03:58 PM   #5
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depends on how bad it is...any loose or protruding pieces should get cleaned off
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Old 09-23-2014, 04:07 PM   #6
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Right, but it just seems like the old stuff would pile up and cause pooling water, and look ridiculous with layer upon layer. I've heard some people re-do theirs every year but what's the point if the old stuff from a year or two ago still looks new?
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Old 09-23-2014, 04:08 PM   #7
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Quote:
Originally Posted by SkyBound View Post
When you guys are re-doing the self leveling sealant on the roof, are you just slopping more on top of what's already there? Or do you remove the old stuff first?
Quote:
Originally Posted by nbhybrid View Post
depends on how bad it is...any loose or protruding pieces should get cleaned off
Also, if you're going to leave the old sealant there (mostly this is the case) make sure you clean the surface of the old sealant before you put new sealant on top of it. I believe most manufacturers recommend Mineral Spirits to clean off the surface of the old Lap Sealant, but be sure you keep it off the roof membrane, the mineral spirits will ruin the membrane. Use a towel to apply it carefully, and make sure you don't set the can of spirits directly on the membrane or spill it. Be VERY careful.
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Old 09-23-2014, 04:14 PM   #8
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Originally Posted by SkyBound View Post
Right, but it just seems like the old stuff would pile up and cause pooling water, and look ridiculous with layer upon layer. I've heard some people re-do theirs every year but what's the point if the old stuff from a year or two ago still looks new?
It's really not that bad. You're not talking about gobs of the stuff, just enough to cover up any cracks in the original sealant. And it's not a fashion show up there, you need it to perform its job, it doesn't necessarily have to look good doing it. IMHO, all that lap sealant looks like crap, but I guess if it works, it works...

Of course, if the old sealant is not wearing well, it needs to go. In that situation (if a lot of the sealant needs to be replaced) I would look into an Eternabond treatment.

I would actually prefer to see some applications of new sealant on a roof, it would indicate to me the previous owner was up there preventing problems and inspecting.
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Old 09-23-2014, 04:20 PM   #9
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Here's a good tutorial about touching up roof sealant. Manufacturer recommendations for which brand/type of lap sealant may differ based on which roof material you have. Example: I have Alpha Ply roof membrane, they want you to use a different lap sealant than Dicor...

http://youtu.be/dsCoHAqKO9Q
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Old 09-23-2014, 04:25 PM   #10
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I just replaced my bathroom fan with a Fantastic Vent fan. It is just about impossible to get all the old caulk off. Also some of the butyl tape will remain.

Get most of the old caulk and tape off, smooth off the tape. Clean area with denatured alcohol. Install new fan with new tape on it, screw to roof and caulk.

I used Dicor II self leveling. They have several videos on youtube.

One video shows filling in gaps in old caulk with new caulk.
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