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Old 08-05-2015, 03:21 PM   #43
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Before installing any foam type insulation in an occupied space, such as inside a motor home, that foam is highly flammable, and emits highly toxic smoke should it burn.
Remember the fire at the Monte Carlo Casino in Las Vegas a few years ago. Fire was burning rigid insulation board.
Then you probably don't want a concrete block home in Florida ...
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Old 08-05-2015, 03:48 PM   #44
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Quote:
Originally Posted by CarlGeo View Post
Before installing any foam type insulation in an occupied space, such as inside a motor home, that foam is highly flammable, and emits highly toxic smoke should it burn.
Remember the fire at the Monte Carlo Casino in Las Vegas a few years ago. Fire was burning rigid insulation board.

I copied the paragraph below from the product description. Not sure just how to interpret it though!

"Polyiso ridgid foam board offers superior fire protection properties compared to any other ridgid foam board insulation."
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Old 08-05-2015, 03:51 PM   #45
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I used 1/2" insulation board R-Tech 1/2 in. x 4 ft. x 8 ft. R-1.93 Insulating Sheathing-320810 - The Home Depot

I cut it about a 1/4 inch larger than the area I was insulating and pushed it in at an angle forcing it to compress as I put it in place on the top of the cabinets. I then cut the back pieces again about 1/4 inch larger than the area put the top against the back wall and forced the bottom into the back wall. They have been there about a year now and have not fallen out yet.

Brian, do you think you could do a fire test on that insulation for us? Someone just brought up the fire danger. Thanks!
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Old 08-05-2015, 03:59 PM   #46
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Originally Posted by CarlGeo View Post
Before installing any foam type insulation in an occupied space, such as inside a motor home, that foam is highly flammable, and emits highly toxic smoke should it burn.
Remember the fire at the Monte Carlo Casino in Las Vegas a few years ago. Fire was burning rigid insulation board.

Actually, by the time the fire gets inside the cabinets to the insulation I definitely won't be there!
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Old 08-05-2015, 04:54 PM   #47
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This is good information and you have given me another project to do. I need to look behind the drawers, perhaps pieces can be put in with some spray adhesive.

Have you done anything with the front overhead cabinet? That gets really hot up there and I was wondering if this would help there too. Thanks for the tips.
I did do some work behind the front overhead cabinet. I got behind the back of the cabinet. I then lined the backside of the back of the cabinet and the backside of the headliner with Reflectix and aluminum duct tape. The reason I used the Reflectix was that the back of the cabinet is heated by radiant heat given off by the hot fiberglass cap. Reflectix reflects radiant heat through the air back toward the source of the heat. In this situation when it is used to reflect radiant heat back into the air towards the source of the heat, it works very well. Think of the reflective panels we put in our windshields to reflect heat back through the glass and into the air.

However, by reflecting the heat back into that dead air space it heats up the area between the back of the cabinet and the fiberglass cap even more. I'm twiddling with an idea on how to vent that heat out into the atmosphere. This situation commonly occurs on yachts. Here's where I'm headed:
Sunforce 81300 stainless steel solar vent - RVs boats sheds + clear hot air out . Big Greenie

If I can get that space ventilated, then I'll also put a layer of the Rmax on the inside of the back of the cabinet to help reduce the conductive heat that makes it past the Refectix.
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Old 08-05-2015, 05:15 PM   #48
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Thanks for the update! I haven't had a chance to do mine but I think that's the way I will go!

One question. Did your cabinets have a wood back or do you just see the wall board?
I bought some chrome colored tacks, but they would not work.
I only have wall cabinets on the side I was installing this. I put the ceiling piece in first and that is when I found out the tacks would not work. There is a layer of luan board above the soft ceiling material. The tacks would not push in.

I ended up using some chrome insulating tape to hold the piece up at the back wall. I then installed the side piece and it helped to hold up the ceiling piece at the wall more. I used the same tape at the vertical cross pieces to hold up the front side of the ceiling piece.

Our space in these cabinets are limited thus another reason to use Reflectix instead of the insulating board products.
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Old 08-05-2015, 05:25 PM   #49
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I bought some chrome colored tacks, but they would not work.
I only have wall cabinets on the side I was installing this. I put the ceiling piece in first and that is when I found out the tacks would not work. There is a layer of luan board above the soft ceiling material. The tacks would not push in.

I ended up using some chrome insulating tape to hold the piece up at the back wall. I then installed the side piece and it helped to hold up the ceiling piece at the wall more. I used the same tape at the vertical cross pieces to hold up the front side of the ceiling piece.

Our space in these cabinets are limited thus another reason to use Reflectix instead of the insulating board products.

I bet RV Goop would hold it in place!
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Old 08-05-2015, 05:31 PM   #50
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I bet RV Goop would hold it in place!

little dab of LIQUID NAILS 10-oz Construction Adhesive
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Old 08-05-2015, 07:11 PM   #51
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Ran by Lowes on the way home and knocked out about half my cabinets. Living in South MS, I'm always looking for ways to fight the heat.
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Old 08-05-2015, 08:38 PM   #52
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Originally Posted by CarlGeo View Post
Before installing any foam type insulation in an occupied space, such as inside a motor home, that foam is highly flammable, and emits highly toxic smoke should it burn.
Remember the fire at the Monte Carlo Casino in Las Vegas a few years ago. Fire was burning rigid insulation board.
Fires in RVs burn so quickly, the flammability of foam and the toxicity of the smoke probably wouldn't be a significant factor.
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Old 08-05-2015, 08:57 PM   #53
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Has anyone insulated the basement storage? Mine seem awfully cold for it to be in the 90s here. Feels like it's getting full a/c
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Old 08-06-2015, 10:09 AM   #54
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Has anyone insulated the basement storage? Mine seem awfully cold for it to be in the 90s here. Feels like it's getting full a/c

I didn't know any manufacturers put any air conditioning vents in the basement storage! Do you have a MH that the A/C unit is in the basement? If so, maybe you have a duct that is leaking air.
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