I was online and googled it a couple weeks ago. 2 part do -it - yourself spray foam insulation was like 650 bucks for the two freon tank size canisters,,enough for a supposed 650 square feet.

Sand is one option but I have heard about a expanding foam that some epa approved company has.

I've never worked on mobile homes but on rental houses I go next size down and put in wood material (shims and small boards) to fill the gaps and create something solid to screw through the window into the frame, then fill the gap with spray foam and wrap over with aluminum.

The cost of filling the tank with sand, cement, foam, etc.3.

In reality, assignments of in-hosue appariser(s) have to fall under the concept of dual control within the bank.

If you are insulating from the inside, then closed cell spray foam is your best option - it will prevent the warm moist air in the basement from making contact with the cool walls in the summer.

So I used black garbage bags and double bagged some of that mattress memory foam and shoved it up in in the hole on either side of the handle for the flue.  

It has not held up very well and I would generally not recommend pursuing paper floors, especially if you are renting to tenants.While the condo is above grade, there was a concrete subfloor with some large cracks/splits/roughness that wouldn't be a problem with carpet pad or foam underlayment for wood/laminate, but these irregularities caused all kinds of problems with the paper floor.

Actually, I used this particular type of raised foam paper for the 1st time about 8 years ago for my kitchen. 

So far only 6's have been signed.