Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Best way to install 8' Explora-Dome on a flat roof?

  • Please log in to reply
3 replies to this topic

#1 Whithull

Whithull

    Lift Off

  • -----
  • topic starter
  • Posts: 6
  • Joined: 27 Apr 2020
  • Loc: Norman, OK/Jones, OK

Posted 02 June 2021 - 10:17 AM

I am building a custom observatory with a warm room and I'm having some trouble designing the interface between the dome and the flat roof. I've included a rendering of the overall design, my plan for framing the roof, and how I'm thinking about securing the mounting ring, so let me know if they seem like they would work.

 

I was planning on making the opening in the roof 91in, which is what Explora Dome says the diameter of the mounting ring is, and placing the ring on top of the roof sheathing (so the ring is flush with the opening) and then fastening it to the roof joists with metal straps like with the 10x10 metal building. However, I notice the the instructions for the 10x10 wood building (which I am not building) calls for a smaller roof opening at 86in instead of 91in. Is this purely to accommodate the plywood mounting ring? I got a call from ED saying it would be 12 weeks until it was ready so I have time to figure things out.

 

Also, my dad has a commercial roofing company in Florida and since it's a small building he said he would come up and do a liquid urethane roof for me, so it would be professionally flashed and sealed. I'm just wondering what others have done when installing an 8' ED onto a custom flat roof. More specifically, what diameter is your roof opening, and how did you secure the aluminum mounting ring to it? Or would I be safer to just build the wood mounting ring?

 

(Drawings/diagrams/photos would be very helpful)

 

Thanks in advance for your input!

Attached Thumbnails

  • RENDER.png
  • ROOF copy.jpg
  • SECTION.png

  • jim kuhns, mboothe and LucasMcCaine like this

#2 MJB87

MJB87

    Gemini

  • *****
  • Moderators
  • Posts: 3,081
  • Joined: 17 Feb 2014
  • Loc: Talbot County, MD & Washington, DC

Posted 02 June 2021 - 11:54 AM

We built a hexagonal foundation covered with a plywood ring.

 

5009F8BF-9FD5-4DF3-B741-5C0A262A335A.jpeg

 

We used a TPO roof and flashed that up and over the top of the plywood ring.

 

B6C0830A-0A1F-47FB-804C-9A3B1855FCC0.jpeg

 

The ExploraDome base ring sat on top of that and the skirt of the dome covered that by 4" or so. We used marine caulking to create a leakproof connection. It has proven to be a good seal.  I can run later this week and get you some measurements.

 

There are more photos on my build thread:

 

https://www.cloudyni...to-existing-ror

 

 

 



#3 Whithull

Whithull

    Lift Off

  • -----
  • topic starter
  • Posts: 6
  • Joined: 27 Apr 2020
  • Loc: Norman, OK/Jones, OK

Posted 02 June 2021 - 12:21 PM

We built a hexagonal foundation covered with a plywood ring.

 

attachicon.gif5009F8BF-9FD5-4DF3-B741-5C0A262A335A.jpeg

 

We used a TPO roof and flashed that up and over the top of the plywood ring.

 

attachicon.gifB6C0830A-0A1F-47FB-804C-9A3B1855FCC0.jpeg

 

The ExploraDome base ring sat on top of that and the skirt of the dome covered that by 4" or so. We used marine caulking to create a leakproof connection. It has proven to be a good seal.  I can run later this week and get you some measurements.

 

There are more photos on my build thread:

 

https://www.cloudyni...to-existing-ror

Thanks, I saw your build log on this and it looks like it would work just fine for what I'm doing. Measurements would be awesome!


Edited by Whithull, 02 June 2021 - 12:23 PM.


#4 MJB87

MJB87

    Gemini

  • *****
  • Moderators
  • Posts: 3,081
  • Joined: 17 Feb 2014
  • Loc: Talbot County, MD & Washington, DC

Posted 02 June 2021 - 12:37 PM

Happy to help. Could you please send me (via PM if you prefer) the precise measurements you are looking for?  Thx.

 

Marty




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics