[medicineman4040]

Two layers now installed in the ceiling.
The pink whatever it is called from Promaster Accessories
and a layer of Hein Thinsulate. But we have room for more.
The she-boss is averse to foam board. She says it squeaks. I say we're
building a rattle-box anyway so what is a squeak here and there.
Resolution came with the suggestion of another layer of Thinsulate!
So now I have to learn basic carpentry and extend the wood frames under
the fan and the air conditioner AND add the same thickness furring strips
across the ribs.
I could have been satisfied with one layer of Thinsulate but since we bought plenty
why not double up.
Anyone see any problem with two layers of Thinsulate as long as we don't compress it ?

 

[RDinNHandAZ]

No but I see little advantage either. My van is R-10 and since it is a van it gets hot over a few hours in the sun and it gets cold in a few hours in the dark and cold. More insulation is going to slow that slightly. I’d skip it, move on to more interesting things and sell the extra on the forum. BTW the insulation board properly attached is silent. She may squeak more than the board.

 

[medicineman4040]

'She may squeak more than the board' Haha! True that

 

[MsNomer]

No reason to assume you will have a rattle box. My load makes some noise as we are leaving town, but soon settles down for a quiet ride.

 

[Charger7022]

I used foam board in my ceiling and on the walls and I have not one squeak and no rattles.

 

[keeponvaning]

Me too. I didn't even foam it in place just a few strips of 2" duct tape to hold it up till I covered it.

 

[medicineman4040]

I'm just happy she agreed to doubling up the Thinsulate....I can only push so far.

 

[KeepMeMoving]

I have been very surprised that with everything I have done I have only one squeak - and I think I have figured out exactly where it is....