Forum Discussion

Walkdog's avatar
Walkdog
Explorer
Oct 09, 2017

Grand Design, new design!

https://www.granddesignrv.com/showroom/2018/travel-trailer/imagine/floorplans/3170bh

Do away with flip up bed and fold down sofa with drawers in back slideout and add computer desk with overhead storage. In bunkhouse area get rid of the outside kitchen and get rid of top and bottom bunk beds and add overhead storage with double bed below. Take away front entry steps. Make area to add batteries for solar over axle or somewhere to balance, at least 8 batteries. Do away with pet dish and run a propane hose to that area with disconnect for Buddy Heaters. If possible make the rear end shorter with a slide out on end. Free standing kitchen table and chairs on all.

Now with these changes if done would be the perfect RV for me. What ya'll think?
  • lawrosa's avatar
    lawrosa
    Explorer
    Oct 09, 2017
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...
  • Sprink-Fitter's avatar
    Sprink-Fitter
    Explorer
    Oct 09, 2017
    lawrosa wrote:
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...


    So why is there no way?
  • SidecarFlip's avatar
    SidecarFlip
    Explorer III
    Oct 09, 2017
    Sprink-Fitter wrote:
    lawrosa wrote:
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...


    So why is there no way?


    No way you can achieve that R value in 2" thick walls. Not enough space.
  • ScottG's avatar
    ScottG
    Nomad
    Oct 09, 2017
    SidecarFlip wrote:
    Sprink-Fitter wrote:
    lawrosa wrote:
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...


    So why is there no way?


    No way you can achieve that R value in 2" thick walls. Not enough space.


    Actually, there is a way to do it but with a hitch. They use Reflexic insulation but it really only works well above 70 degrees.
    While it doesn't do much of anything in the cold, it does give it's rull insulative value in the heat.
  • hilandfrog's avatar
    hilandfrog
    Explorer
    Oct 09, 2017
    hahahaha Classic... I always laugh when I see R-40.....R-13 is common for homes, and most of them have 3.5-5.5 inch thick walls,.
    Ya ya modern advances in insulation.... BWAHAHAHAHAHAHAHA
  • Second_Chance's avatar
    Second_Chance
    Explorer II
    Oct 09, 2017
    SidecarFlip wrote:
    Sprink-Fitter wrote:
    lawrosa wrote:
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...


    So why is there no way?


    No way you can achieve that R value in 2" thick walls. Not enough space.


    The R-30 and R-40 are in the floor and roof - not the walls...

    Rob
  • Sprink-Fitter's avatar
    Sprink-Fitter
    Explorer
    Oct 09, 2017
    SidecarFlip wrote:
    Sprink-Fitter wrote:
    lawrosa wrote:
    R-Value (Main Floor)
    R-30
    R-Value (Walls)
    R-7
    R-Value (Roof)
    R-40


    Anyone who touts a r 30 and r 40 values in an RV should be looked at closely... There is no way... Sold on lies and misinformation...


    So why is there no way?


    No way you can achieve that R value in 2" thick walls. Not enough space.


    How can you not get a R-7 in the wall?

    The pink foam is R value of five per inch so an inch and a half gap would be R-7 1/2
  • RinconVTR's avatar
    RinconVTR
    Explorer
    Oct 10, 2017
    Solid foam board is R-5 per inch of thickness.
    High end foam board is R-10 at 1-3/4", and R-12 at 2 1/8 " thick

    Fiberglass is rated at R30 @ 10"

    The floor and roof of the Grand Design Imagine series is in fact around 10" thick and there is mostly foam in the roof. They can accurately claim R30 and R40 values.

    But in reality, I have found their use of insulation EXTREMELY sloppy in the roof and floor. Huge gaps all over the place. And the roof also has many passages that de-rate the insulation average effective value.


    So yeah they can claim R30/R40 because they technically have the thickness...but it is absolutely a marketing gimmick.

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