Easiest way to extend basement register

[timmyg123]

I have a downward facing 10x4 register that I need to extend 3"
past a soffit I'm building as I frame my basement.

I have purchased a sheet of tin and some snips. Now I"m lost.

What is the best way to do the extension? Four seperate sides
of a 'box' with bent tabs on each end to connect to the duct and to
the new wood framing? What is the best way to attach to the
duct? Rivets? Tape all the seams?

Thanks for your instruction.

[Jay11J]

I would build a box to go around the current duct, then rivit to the duct. then seal it with foil tape.

[Ed Imeduc]

Check and see if the duct there has a 1" turned in ,in the duct. If so take and turn it out and down at a 90o. If so you can make a 4" deep box 10"X4" and put it on the lip there.
If not and just a 10X4 hole. cut a strip of the sheet metal 6" wide and make it into a box 10"X4" on one side bend 1" out 90o all around. This you can screw up to the duct. On the other side cut up 1"in each corner. Now take and bend the 4" sides out 90o This will be on top of the drywall so you have something for the register screws to go into. The 10"side bend over on the out side of the drywall. Have to do this last part also if you go the first way.
use #8 sheet metal screws for it all and aluminum tape.

ED ;)

[jstanco]

I am also currently finishing my basement and have a heating duct question. I actually had the same question about lowering a duct for a soffit, so thanks for the answer!

My current question is this: Where is the best place to cut in a vent in the trunk line of my heating duct? The one trunk has a first floor bathroom and two bedrooms coming off of it. I cut my vent in after the bathroom duct but before the two bedroom ducts. Was that a bad place to do it? Would I have been better off putting the vent for the basement at the end of the trunk line after all the existing ducts received their heat?

John

[Ed Imeduc]

We take all basement heat runs off the top of the duct and run them to just off the outside walls use a 2 1/4" X 12" register blowing down.As for air you can close them some or close the upstairs registers some. You have to play with it to get the heat where you want it. Any heat let out down there is still in the home so its not a loss.

ED ;)

[jstanco]

Ed,

Where do you suggest I cut into the top of the main trunk? At the end after all the upstairs runs, or anywhere-does it matter?

John :rolleyes:

[Ed Imeduc]

Any where thatwill work out for the best run into the basement.

ED :coffee: