[Greenbuilding] friction & insulation batts

[Bob Klahn]

Why fight to feed batts into a cavity situation which sound very 
difficult, when pacing the cavities with the same mineral fiber by 
blowing would seem a much easier approach?

On 3/27/2015 4:55 PM, Reuben Deumling wrote:
> Two questions.
> Were you pushing these batts into a bay the long way (vertically if 
> this is a wall)?
> What is PPE?
>
>
> On Fri, Mar 27, 2015 at 6:56 AM, David Wentling <dpwentling at ymail.com 
> <mailto:dpwentling at ymail.com>> wrote:
>
>     Years ago I needed to install thick batts in openings. To assist
>     me ensure the batts were square to the opening and not compressed
>     I created a wooded knife shaped stick. I would press in one side
>     of the batt along the long edge then swing the batt into the
>     opening using the ‘knife’ between the batt edge and the joist or
>     stud. The ‘knife’ allow me to reduce the friction when sliding
>     next to the wood and provided a tool to compress the batt the full
>     depth of the batt to ensure the back edges were square to the
>     opening. We used unfaced fiberglass.
>
>     The wooden knife was a board about 16” long, more of a small
>     machete, that was belt sanded to a thin rounded edge and a rounded
>     handle for easier handling. I had to make several of the them over
>     the renovation project and used lathe strips pulled from the
>     house. Looked like a large wooden letter opener.
>
>     Don’t for get the PPE!
>
>     David
>
>     On Mar 25, 2015, at 2:34 PM, Reuben Deumling <9watts at gmail.com
>     <mailto:9watts at gmail.com>> wrote:
>
>     The situation is as follows:
>     a ceiling with 7-1/4"x14" bays, 11 feet deep
>     car decking below, fir T&G flooring above, rough sawn 2x8s in between.
>
>     I can get Rockwool/Roxul batts that are the right height and will
>     figure out a way to trim them to the right width. My question is
>     whether anyone has a suggestion about how to devise a sleeve or
>     baffle to reduce the considerable friction all those rough sawn or
>     at least not particularly smooth surfaces will present to the
>     batts being shoved horizontally through those bays?
>     I expect to be able to access both ends for this purpose, which
>     should increase the options for friction-reducing aids.
>
>     Any ideas?
>
>     Thanks very much.
>
>     Reuben
>
>     Oh, and I nixed the blown in cellulose idea because of the
>     challenges of creating the necessary back pressure on a bay that
>     deep/long. I'm sure with a suitably devised baffle that I could
>     gradually back out the nozzle & this problem could be overcome,
>     but it is not a large job (11'x12') and the batts seemed easier.
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>
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