[Greenbuilding] [dealing with] Cellulose [settlement]

[Rob Tom]

"JAY WALSH" wrote:

>   dealing with some large open bays, approx 8' x 10' x  9-1/4".
> there is a good chance you will get settling over the years.

Years ago, quite possibly before some of the current listmembers were  
born, the former engineering/architecture/const. firm of  
Allen-Drerup-White did a superinsulation retrofit of a frame home where  
they attached 2x3 stand-offs to the exterior using sheet metal clips and  
 from which they hung 2x3 curtain wall studs to carry the new sheathing,  
siding & windows etc.

I forget how thick the new outsulation cavity was but I'm pretty sure that  
it was at least 300 mm. if not more.

They anticipated settlement of the cellulose so they designed the exterior  
cladding with a cornice board that could be removed to enable inspection  
and topping up of the blown-in cellulose years down the road.

They also "pre-settled"  the cellulose by vibrating (actually, more like  
bashing it senseless) the sheathing immediately after the insulation was  
blown in and then topping it up again.

-- 
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c  at   C h a f f Y a h o o  dot  C a  >
(winnow the chaff from my edress in your reply)