framing around a window?

KUIPORNG

Do not insulate the return air duct, there is no need...

to insulate the heat, duct, forget about the expensive and labour intensive shiny thing... use regular insulation stuff, if you worry about it, use those they said fire code withstand somthing like 1000 degree... they only cost 30 bucks for a big bag. it is more than enough to insulate all your head trunk... just buid the soffet with two wall covered, and stuff the insulation inside ... and stuff the insulation between the ceiling and heat trunk as well which you can do now... I don't know why no body suggest that... but I did that myself on some of the trunk which I have not covered... which is effortless...

after thinking about it, I think those shiny thing is for people who do not build soffit, if you are building soffit, why use it ... as you have all the support to stuff in regular insulation...

yummy mummy

Your suggestion sounds like a good idea.
I think I will do that, because the shiny stuff is too much work and too expensive. I have a lot of ducts.

The insulation that you are talking about is it specifically for heat ducts?

I like the shiny stuff but too much work, and expensive.

KUIPORNG

The insulation that I was talking about is not specifically for heat ducts... it is for general insulation but it is stamped fire code approval..etc. I saw regular insulation around duct area sll the time from the builder... I don't see any danger/problem of this...

yummy mummy

I have a vent in the basement that the contractor put some insulation in, and it has a plastic sheeting on top.

Does the one that you use have the same, plastic sheet on top?

Thanks kui****g

KUIPORNG

No I used the run which is greenish color like cotton but it is not cotton...cost $32 buck in HD... it's label said it is fire resistant, I don't see other said that so I go for that one...