| Author | Message | ||
| David Evans (Dmd)
Rating: N/A |
Today i saw an old Range Rover with a 2nd roof attached to fore and aft ribs with about a 3/4 " space between them. Does anyone have a MCI-5C with the Saudi roof? and how is that one attached? And how does it work? I like the idea of extra insulation on the roof. Thanks | ||
| Marc Bourget Rating: N/A |
The second roof isn't "insulation" but it is an excellent reflector. It would be better to have a thermal "disconnect" between the respective "roofs," attached with something like plastic rather than metal ribs (conductivity issues) Many 5-Cs are around, MAK sold one or more. Good that you appreciate the benefits. Onward and Upward | ||
| FAST FRED Rating: N/A |
George Meyers used to be a big proponent of adding a foot or so if insulation on the roof , and covering it with thin aluminum. Had a booklet for sale , a while back. FAST FRED | ||
| Gus Causbie (Gusc)
Rating: N/A |
As long as your have air between the two roofs you have insulation because air is the best insulator. After all, the main ingredient of any insulation is air. All forms of insulation just serve to keep the air from moving. The best roof color is white. I'm amazed at the number of silver colored roofs, silver is a very poor reflective color. | ||
| JW Smythe (Jwsmythe)
Rating: N/A |
I've seen that done for mobile homes. The best are just pole roofs built over the mobile home. Since their roofs always leak, they're usually built for that reason, but do a great job of keeping the place cool. I don't know that you'd need to be terribly concerned with the attaching material. If you used metal, the points would be insignificant compared to the overall seperation. I was thinking of using solar panels on my bus for the same reason. If I set it up so they could extend when parked, they'd make a nice awning and shady spot for the whole thing. I still haven't figure out how to make that pretty though.  The solar panels are way down the list, somewhere past "move into bus" and "hit the road" | ||
| WEC4104 Rating: N/A |
I agree with Gus' comment that white would be the best roof color, but want to mention something about the color silver. In general, silver is actually a very good color from a reflectivity standpoint. I say "in general" because there are lots of different paints that people call silver, ranging from gray with a little metal flake added, to a highly polished mirror-like finish. The more shiny silvers will reflect MORE light/heat than even white. Where silver falls down in the heat protection area has to do with its ability to get rid of the heat it has absorbed. Silver does a poor job of radiating it back into the surroundings in the form of far infrared energy (a characteristic called emissivity). So even though the silver reflects a lot of the sun's energy, what it does absorb, it just doesn't shed easily, causing the roof to heat up. | ||
| Marc Bourget Rating: N/A |
Clarke Echols provided the information awhile back supporting the use of white paint in engine areas. Typically black is the color of choice (not just because it hides dirt!) but Clarke revealed the intelligent perspective that Black (re)-absorbs more than White, while they both have (virtually) identical emissivity constants. White is superior in that it doesn't absorb as much as black, all other things being equal. |