hvac ductwork question

[glock34]

finding a lot of ductwork in my crawspace that is not sealed. Working on repairs but have a question. Where the space between joist are used as ducts how do you seal the gap between the wood and metal? Can you use the foil tape?

 

[elpenguin0717]

Hahaha psh I got by with duck tape lol it's still holding up and I feel the differnce in my house gets warmer fast

 

[Tactical Dave]

I was in a ladies crawl the other day and she said she had to have the heat at 85 to keep house warm and she just had a a new furnace put in and that here room stayed cool. Opened up the crawl and got a blast of heat..... Yeah the hvac guy forgot to re attach all the ductwork!

 

[slimplmbr]

Duct tape, foil tape, or you can get what guys in the field call duct butter. It's like a liquid brush on duct tape, put it on with a paint brush and it usually dries completely in 24 hours. Seals really good but it can be a little messy.

 

[Bill of Rights]

Similar question: Some friends of ours have said they have a problem with ductwork under their slab foundation (leaks water and has temp problems). There has to be another way to seal it without taking a jackhammer to their slab... isn't there?

Blessings,
Bill

 

[jd4320t]

Similar question: Some friends of ours have said they have a problem with ductwork under their slab foundation (leaks water and has temp problems). There has to be another way to seal it without taking a jackhammer to their slab... isn't there?

Blessings,
Bill

I thought everything was above the cement on a slab house

 

[Cpt Caveman]

On a slab, the duct work is all in the attic and the walls. At least that's all I've ever seen.

 

[Mr Evilwrench]

When I was a teenager we lived in a condo with some ducts in the slab. Never seemed like a good idea to me.

 

[Cheapdiesel]

I have seen a lot of slab houses with the ducts in the slab. Never works well and there is not much you can to to improve things.

 

[slimplmbr]

On a slab, the duct work is all in the attic and the walls. At least that's all I've ever seen.

Some houses, not sure of the time frame, were built with the ductwork in the slab. Around the time when tri-levels were popular. A couple friends of mine have these slab houses. Personally I think its a bad design.

 

[glock34]

Thanks for the replies. I was at a loss for words yesterday when I started pulling some of the insulation back. Since I have a mess to finx I wanted to do it right. here is a photo of some of the shiz I am finding. That is running thru my cold air return. you can also see another hole in the babkground