using slow rise foam insulation

Has anyone done this to improve thier heating costs ?

 

Where do you get this slow rise stuff? Not from a can, surely!

 

Hi kct,
Slow rise has its applications, but you need to be sure it is going only where you want it. It is also expensive, but in some places its simplicity makes up for the cost. Performance should be good, as with all foam products, they seal well.

Where are you looking to use it?

Bud

 

Is what you are calling "slow rise" related to polyisocyanurate? I have been thinking of having someone blow this stuff on the walls of my metal shop, between the studs, figuring it may be better than kraft faced fiberglas.

 

This stuff literally pours into a cavity and expands slowly. Your get less fill, but less pressure than the fast rise stuff. If you have open cavities, then the DIY spray foams will work fine. Several size kits for home use are available. I haven't checked lately, but $1.00 a board foot comes to mind. That would be about $35 to fill one 8 foot 2x4 stud bay. In most cases, just an inch or two would be enough.

Then the question is, can you leave it uncovered. Most cases it is advisable, some it is required.

My choice is to cut and fit some rigid foam to fit tight, neater and cheaper.

Bud

 

Yeah, the rigid foam was my last choice after the kraft fiberglas mainly for expense. I'd prefer professionally sprayed blue stuff, but I feel it would be too expensive.

 

I'm doing a bath remodel here at home and plan on using some of the mineral wool. I like the looks and the reading is good so want to do a little work with it first hand. When they eventually figure out how to make those two part foams so you can use a little today and the rest next week until it's all gone (and get the price down) then it will be a lot more popular. Making the best insulating product we have, spray foam ,more affordable should be a priority I would think.

Bud

 

I think the high cost is strictly due to high mark up. I can't see it costing that much to make. It's been around for awhile.

I'm pretty sure you can use part of the container on those two part foams. You will need a new tip for the spray gun though. The stuff I'm looking to use has an 18 month shelf life.

 

Bud, is that the mineral wool stuff like Holmes uses? I have a piqued interest in that stuff, too. Looks like a good product to work with.
Drooplug, yeah, it is sort of like we use in laminating, the stuff is fairly stable in the hose, but you have to change the tip on every use if it is beyond drying time. And eventually the hose has to be purged with thinner. Gotta be an easier way, though.