Solitude Insulation

[gsmithrr]

Does anyone know the thickness and r Value of the fiberglass insulation that sits on the chloroplast in the underbelly. Mine needs to be replaced due to leaks
Its a 2020 310gkr

[Country Campers]

GDRV-Megan

Could you please answer this owners question?

Thanks
Brian

[GDRV-Megan]

Does anyone know the thickness and r Value of the fiberglass insulation that sits on the chloroplast in the underbelly. Mine needs to be replaced due to leaks
Its a 2020 310gkr

We are currently using R-11 in the underbelly.

[Cate&Rob]

We are currently using R-11 in the underbelly.

R11 would translate to 5" of fiberglass batt insulation . . . unless Grand Design is using something with better insulation properties? (I don't think the OE insulation is that thick)

gsmithrr
You might want to consider fitting closed cell rigid foam insulation panels. These do not absorb water. Insulation value is about R5 per inch. So, you would need two inches to reach approximately R11. The problem with batt insulation is that it is a big sponge that will have to be replaced every time there is a water leak into the underbelly.


I sheathed the underside of my Reflection with 1" rigid foam above the coroplast and foil . . . which is better than just the foil that was there before (towards the forward end only).

Rob

[Glamping4two]

R11 would translate to 5" of fiberglass batt insulation . . . unless Grand Design is using something with better insulation properties? (I don't think the OE insulation is that thick)

gsmithrr
You might want to consider fitting closed cell rigid foam insulation panels. These do not absorb water. Insulation value is about R5 per inch. So, you would need two inches to reach approximately R11. The problem with batt insulation is that it is a big sponge that will have to be replaced every time there is a water leak into the underbelly.


I sheathed the underside of my Reflection with 1" rigid foam above the coroplast and foil . . . which is better than just the foil that was there before (towards the forward end only).

Rob

Hey Rob,
Did you do a write up on your insulation? I'm looking to do the same on my 310Gk this fall. Thanks!

[Second Chance]

Hey Rob,
Did you do a write up on your insulation? I'm looking to do the same on my 310Gk this fall. Thanks!

The floor and underbelly insulation are very different on the Solitudes compared to the Reflections. Are you talking about replacing the fiberglass with closed cell foam? Here's what's under there now (scroll down):

https://www.granddesignrv.com/showro...e/construction

(Another) Rob

[Cate&Rob]

Hey Rob,
Did you do a write up on your insulation? I'm looking to do the same on my 310Gk this fall. Thanks!

I did not do a write-up specifically on adding the sheets of rigid foam insulation. This came along as a "side project" when closing up the underbelly after installing the plumbing access doors in the front and the second spare tire at the rear. In the first round (picture 1) I used zip ties to fasten the insulation to steel cross frames that I installed in the front part. When I got to the back of the trailer, I came up with a little more "sophisticated" retention scheme (pictures 2 & 3) which makes the insulation panels much easier to remove for service. I fabricated thin wall steel cross members that bolt to the frame rails and used stainless steel "twist tabs" riveted to these cross member to retain the sheets of insulation.

Rob

[Jims94vmx]

Nice work Rob

[Glamping4two]

I did not do a write-up specifically on adding the sheets of rigid foam insulation. This came along as a "side project" when closing up the underbelly after installing the plumbing access doors in the front and the second spare tire at the rear. In the first round (picture 1) I used zip ties to fasten the insulation to steel cross frames that I installed in the front part. When I got to the back of the trailer, I came up with a little more "sophisticated" retention scheme (pictures 2 & 3) which makes the insulation panels much easier to remove for service. I fabricated thin wall steel cross members that bolt to the frame rails and used stainless steel "twist tabs" riveted to these cross member to retain the sheets of insulation.

Rob

Thanks Rob. Going to add Sea Level tank gauges and want to do something better than that bat insulation. My underbelly looks like a beer belly! Lol

[steve&renee]

The floor and underbelly insulation are very different on the Solitudes compared to the Reflections. Are you talking about replacing the fiberglass with closed cell foam? Here's what's under there now (scroll down):

https://www.granddesignrv.com/showro...e/construction

(Another) Rob

The 2018 page has the same pictures. Wonder why it doesn't *feel* that well insulated. . .

[Second Chance]

The 2018 page has the same pictures. Wonder why it doesn't *feel* that well insulated. . .

We can tell a real difference from our previous Reflection. We wintered in northern Maryland at the top of the Chesapeake and had some stretches in the low teens with high winds. With the floor insulation and dual pane windows, the Solitude was much easier to keep warm than the Reflection was in the same place under the same conditions.

Rob

[abacon09]

I did not do a write-up specifically on adding the sheets of rigid foam insulation. This came along as a "side project" when closing up the underbelly after installing the plumbing access doors in the front and the second spare tire at the rear. In the first round (picture 1) I used zip ties to fasten the insulation to steel cross frames that I installed in the front part. When I got to the back of the trailer, I came up with a little more "sophisticated" retention scheme (pictures 2 & 3) which makes the insulation panels much easier to remove for service. I fabricated thin wall steel cross members that bolt to the frame rails and used stainless steel "twist tabs" riveted to these cross member to retain the sheets of insulation.

Rob

Rob,
I'm about to put some insulation on my Reflection 28BH. Is there a particular reason you only went with 1 inch foam. Was space an issue or was it just more economical with the thinner foam?
Thanks
Andrew

[Cate&Rob]

Rob,
I'm about to put some insulation on my Reflection 28BH. Is there a particular reason you only went with 1 inch foam. Was space an issue or was it just more economical with the thinner foam?
Thanks
Andrew

Hi Andrew,

I missed your question . . . I went with 1" foam insulation because of space restriction. Reflections do not have batt insulation on top of the coroplast like is done on Solitude, so there is limited space below the tanks.

Rob