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-   -   Is dark gray attic insulation ok? Is it worth replacing with batt insulation? (http://www.diychatroom.com/f103/dark-gray-attic-insulation-ok-worth-replacing-batt-insulation-124252/)

entropyjx 11-21-2011 11:06 PM

Is dark gray attic insulation ok? Is it worth replacing with batt insulation?
 
I bought a house near Seattle, constructed in the 1970s.

The insulation in the attic is a dark gray loose fill. Is this color ok?

Also, I measure, it's only about 5 inches deep, which ... but it is covering the floor joists.

http://imgur.com/C0Mfv


Ugh seems really dirty and messy though. Is it worth it to clean my attic out of this gray loose insulation and replace it with neater pink Batt Insulation?

oh'mike 11-22-2011 06:16 AM

That's blown in cellulose ---perfectly fine insulation---I suggest you add more as 5" is not enough for r-38 ----

Windows on Wash 11-22-2011 08:16 AM

Quote:

Originally Posted by oh'mike (Post 776769)
That's blown in cellulose ---perfectly fine insulation---I suggest you add more as 5" is not enough for r-38 ----

+1

Not even close. You really should shoot for an R-50 at that.

entropyjx 11-22-2011 06:07 PM

Quote:

Originally Posted by oh'mike (Post 776769)
That's blown in cellulose ---perfectly fine insulation---I suggest you add more as 5" is not enough for r-38 ----

If I put another 5 inches, it'll be really high and might poor out of the attic entrance?

Is Batt better or worse insulation? I really like how it's so neat and not loose.

oh'mike 11-22-2011 07:28 PM

Quote:

Originally Posted by entropyjx (Post 777176)
If I put another 5 inches, it'll be really high and might poor out of the attic entrance?

Is Batt better or worse insulation? I really like how it's so neat and not loose.


Make a plywood collar if you want to---

Windows on Wash 11-22-2011 11:08 PM

Quote:

Originally Posted by oh'mike (Post 777214)
Make a plywood collar if you want to---

+1

Make a wall around the scuttle of plwood, cardboard, or rigid foam. Pretty much anything will work but the woods will be more structural if you are leaning on them much to get up there.

jimmy21 11-22-2011 11:13 PM

Or even 1 batt of r30 or 38

Gary in WA 11-23-2011 12:30 AM

A belated "Welcome to the forums!" to a neighbor just North of me.

WA State has it's own "Energy Code" -a little tougher than IRC. Page #55, here: http://www.energy.wsu.edu/Documents/...ers%201-10.pdf R-49 is minimum, the guys here are "right-on"!

Air seal by raking the existing out of the way, to reuse. http://www.google.com/url?sa=t&sourc...O842EQ&cad=rja

Gary


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