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Hello! We have a solid concrete dome home, the walls curve up to eventually become the roof. The house has leaks to the inside just about everywhere. The house was painted with Conflex XL Elastomeric before we bought it and it's now filled with water bubbles and peeling off in sheets of rubber. We are working on removing the Conflex XL, but it's not an easy task... I asked about that in the painting forum.
For the *Roof Forum* I'm wondering a few things...
The house has many flat roofing sections, all made of concrete. They are incredibly uneven, some pitch in, some have parts that pool water, all of them look bad, and all of them have the same Conflex paint on them. Is there some method that I can concrete over them with a thin layer that's pitched a bit to get the water away from the house? How would I prepare that? or would it be better, or possible to attach a wooden framed peak over these areas and then shingle them or something? I don't know anything about roofs, so if I did that, wouldn't the empty space just fill up with hornet nests and whatnot? (We also have a bad problem with giant black ants)
For the second part of my question... the house is primarily made of large pre-manufactured concrete triangles that are joined together on-site and concreted together in the joins. These joins are the weakest part of the house and I'm not sure the concrete was mixed and installed properly in the first place. Our thinking was to cover these seams (about 12" wide, 6' long) with Henry 208 or Henry's 208R and then painting the triangles between with normal, good quality latex house paint (and paint over the Henry's for looks instead of big black strips all over the house). We also plan to use Henry's on all of the flat roof areas and wall corners for extra waterproofing. The thinking is that the Henry's will create the waterproofing with a solid seal while the regularly painted triangles (made of properly mixed uncracked concrete) would allow the house to breathe because it's painted with regular paint. The Dome manufacturer (AIDomes.com, the kit maker, not the actual house builder) suggests just painting the house with a quality latex paint and to avoid Elastomerics. However at this point the house has had years with improperly applied Elastomeric and has so many problems that it *feels* like the house needs a fresh "skin" on much of it and Henry's 208 is the only thing we can come up with as novices that will give us quality long lasting results.

Thanks for taking the time to read and think! :thumbsup:
 

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This is what i will be using to make my underground home.
I think the possibilities are high that if you can avg. 7-8,000psi out of a possible 12,000 with one inch inside and out, and use 2# EPU, you could do away with the rebar, plus it’s water proof after 3/8 inch. No blistering, it does not shrink or expand with the temp. It is 20 to 30% lighter than cement. It is seamless, you can spray one day, go back a week later and finish up. Not effected by salt. Can be made with salt water and beach sand. I think it’s still around 20-25$ for 50#.

http://www.brownhomes.org/Brochures/Wat ... esults.pdf

http://www.brownhomes.org/

http://www.brownhomes.org/Brochures/Cov ... art_r3.pdf

http://www.grancrete.net/videos/index.cfm

Hope this helps
 
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Hello all I am new to this site but was sent here by a customer who thought I could help others out with their Geodesic Domes. We have specialized in geodesic dome homes for over 35 years. I own a roofing company which is due to my father owning a Geodesic Dome Construction company. The problems that you are having with the cracking inside is common and is due to expansion and contraction that domes do. If you do not have a cupola installed on the dome it will be worse than those that do due to inadequate ventilation. The manufacturer is correct, stay away from elastomerics because that will completely seal the dome and add to the ventilation problem. If you could post a few Pics I should be able to help a little more. There are a few tricks to stopping the interior cracks. Feel free to contact me via email or this site.
www.newagedomeconstruction.com
www.prestigeroofingconcepts.com
 
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sheetrock cracks

Ok just so I am clear, on a geodesic dome the expansion and contraction of the structure will create cracks along the sheetrock seams using traditional compound. A proven way to prevent the cracking is to use Benjamin Moore elastomeric patch knife grade. What we do is along the outer perimeter of every triangle is thin the patch to compound consistency and apply like standard sheetrock compound. Also we use the mesh seam tape along the seams. Not endorsing any particular product just wanted to pass along what works well. Hope this helps and good luck.

Dan
 

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Hello, I own a geodesic dome in Northeast Ohio and I was hoping you could help. I need a new roof, and would really like to get in touch with someone who knows and understands these. Any help would be greatly appreciated. Thank you!
 

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Discussion Starter #12
Well, I've had the home for 5 or 6 years now and I'm slowly just watching it fall to ruin. Still haven't found a solution or anyone to help.

I had resigned to pay for a Rhino Shield treatment (like the truck-bed stuff, they do that for houses now too!) but the full Monty quote was $40k, when we asked for a breakdown of the quote he said he couldn't do that, it would just be $40K. So that fell through ;)

Currently the plaster is falling off all over the inside from the outside leaks and when it rains we put buckets all over in their now "designated locations", heh. Although we are well beyond the problem of "a leak and a crack", in general concrete can be frustrating to the interior since any water coming in first soaks into the concrete, then works its way through the soaked concrete to wherever it feels it should go, and eventually works out through any plaster that also decided it has already soaked up enough water or where there's a crack for it to run off.

I'll PM you my normal email address to offer any of my experience though since any data might be helpful data when troubleshooting or choosing a direction to go.
 

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Why not cover it with a modbit or EDPM membrane?

For the flat areas, what is there for insulation? If you are looking to get slope for drainage you can add tapered insulation and top it with one of the above mentioned membranes.

Henry (aka Bakor) and others have elastomeric coatings that you might be able to use. I have no experience with these on a concrete surface though
 

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I would think the EPDM would end up horribly wrinkled. Drape a towel over a basketball and you will see what I mean.
You would obviously have to seam it to conform to the panels. Any membrane roof has seams and if done correctly they're not a problem at all!
 

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-Q-
I don't know a lot about concrete domes, the geodesics are quite different from what you descrbe. However, I did find a website called www.dometimes.com and it's a collection of people who live in, or appreciate dome homes. You may want to try that group to source some solutions, as you may find someone who lives in, or has experience with concrete domes. I hope you find something that works for you :)
 
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Geodesic Dome roof.

The situation you are in is a very common one for dome home owner's. Also one I am very familiar with, as this what we do. We are based in Savannah, GA and have re-roofed domes from Canyon Lake, CA to, currently north of Burlington, VT. We are a full service roofing company that install types of roof systems but domes are a different animal entirely. One thing to be aware of is to not believe everything you hear. The reason you will not find us advertising everywhere is that our customers should be the first place to enquire as to whether a specialized dome roofed is and/or was needed. I am on a dome now in VT as I stated and am enroute to Baltimore, with two other dome stops en-route. Feel free to contact me via email and I will put you in contact with any and all of the hundreds of customers that you would like to have your roof replaced once correct as opposed to several times in the same 30 year span. It seems strange that someone actually specializes in these roofs but you will find my father on Dome Times explaining what I have stated here. His company is New Age Dome Construction. I hope to hear from you it is terrible to he re-roofing a home that was done only a few years ago and finding the damage that we find in such a short period of time.
Sincerely,
Dan Johnson
Prestige Roofing Concepts LLC
Owner / President
 
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Why not cover it with a modbit or EDPM membrane?

For the flat areas, what is there for insulation? If you are looking to get slope for drainage you can add tapered insulation and top it with one of the above mentioned membranes.

Henry (aka Bakor) and others have elastomeric coatings that you might be able to use. I have no experience with these on a concrete surface though
If you attempt to do this you will see the home rot from the inside out in an even shorter period of time. Please contact me for a client reference list. Do not take someone's word for it talk to people who have been there and now have the proper roof system installed.
 
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Well, I've had the home for 5 or 6 years now and I'm slowly just watching it fall to ruin. Still haven't found a solution or anyone to help.

I had resigned to pay for a Rhino Shield treatment (like the truck-bed stuff, they do that for houses now too!) but the full Monty quote was $40k, when we asked for a breakdown of the quote he said he couldn't do that, it would just be $40K. So that fell through ;)

Currently the plaster is falling off all over the inside from the outside leaks and when it rains we put buckets all over in their now "designated locations", heh. Although we are well beyond the problem of "a leak and a crack", in general concrete can be frustrating to the interior since any water coming in first soaks into the concrete, then works its way through the soaked concrete to wherever it feels it should go, and eventually works out through any plaster that also decided it has already soaked up enough water or where there's a crack for it to run off.

I'll PM you my normal email address to offer any of my experience though since any data might be helpful data when troubleshooting or choosing a direction to go.
I do not get time often to respond to this board. Q feel free to contact me via email, I have it on me all the time. Also look into Dome Times and read what John Johnson has posted. Ensure you do your homework and check all of the Dome customers of the proposed roofed before making a decision. Also, again sealing a dome off such as with an elastomeric or rubber membrane, even Grace ice and water is bad news. Talk to the customers I am working for right now. Thanks Dan.
 

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If you attempt to do this you will see the home rot from the inside out in an even shorter period of time. Please contact me for a client reference list. Do not take someone's word for it talk to people who have been there and now have the proper roof system installed.
So what would be the preferred method of re-roofing these things? I've never come across one so I assumed they would be similar to a concrete deck type roof.
 
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