Possible Dicor roof problem

[dryfly]

I have a Dicor rubber roof (think it is EDPM) on my 5th wheel. It is 7 years old and still in fairly good shape.

While checking recently I noticed an area of about 6 sq feet where there are lots of small bumps. These are not bubbles but small raised areas of about 1/8th in diameter. They are very soft and come off quite easy, however removal does not expose the roof so no concern there. Just a surface issue, but definitely part of the roof membrane.

Anyone like to guess what caused this, or is it even an issue I should be concerned about?

[SH]

FYI We just had the roof replaced (EPDM) on our 2001. Cost was almost 12K which included some rot repair, new vents and skylight etc.

[Charlie_D_]

dmckenna99a wrote:
DICOR now acknowledges that there is a problem with the top layer, but say it does not lmpact wear. They say it is cosmetic. My roof is tan and don't know if issue relates to colored roofs.

Their offer is to provide a full 12 year transferrable warranty but I don't think this will convince a potential buyer.

If other people have this issue, let's hear about it and let Dicor know we need a better solution.

When blisters are abraded even by a lightweight like me, the membrane skin is broken. This looks terrible and will definitely impact resale or trade value. I probably have about 20 spots as shown in this pic from one visit to the roof when i cleaned off my slides.

IIRC-roof is prorated by year and DOES not cover labor.

[dmckenna99a]

DICOR now acknowledges that there is a problem with the top layer, but say it does not lmpact wear. They say it is cosmetic. My roof is tan and don't know if issue relates to colored roofs.

Their offer is to provide a full 12 year transferrable warranty but I don't think this will convince a potential buyer.

If other people have this issue, let's hear about it and let Dicor know we need a better solution.

When blisters are abraded even by a lightweight like me, the membrane skin is broken. This looks terrible and will definitely impact resale or trade value. I probably have about 20 spots as shown in this pic from one visit to the roof when i cleaned off my slides.

Update Jan 17, 2017 DICOR has now agreed to replace roof.

[dmckenna99a]

Like Robbyk I have extensive blistering on a 2 year old Elkridge DICOR roof. Blisters are mostly about 3/8", with largest about the size of a quarter. The blister is in the membrane itself, and not under it because if you scrape it, you see white rubber underneath. My roof is tan and RV has been left in central Florida the past two summers. It was very hot and humid this past summer and I wonder if this is related. DICOR has the pics but say they have not seen this before and are slow to respond. My local mobile RV guy suggests the rubber is delaminating.

The roof has not been abused. Robbyk, do you know what UV product was used? How old is your roof?
Did you contact DICOR?
Did you get your roof fixed? How? $$$
Can anyone help?
How old are your roofs with similar issue?

[robbyk]

Not sure if this is the same situation but 2 weeks after having the dealer apply a uv coating to the roof of our 5th wheel the entire roof has blisters and bubbles as if it has suffered a chemical reaction or similar to a serious flash burn incident. Has any one else had this or seen this and knows what the cause is. It appears that the entire roof is going to need to be replaced. If you would like a picture please request one and I will send.

[harold1946]

From your description I believe what you are seeing is the beginning of the normal sluffing off of the top layer of EPDM. I would not be overly concerned.