- Joined
- Apr 28, 2016
- Messages
- 86
I'm considering building removable sound baffles for some of the equipment in my home shop/garage, probably 3 sided with an open top of ventilation. In particular, the household vacuum system is probably taking about 15 mins off my life expectancy every time it cycles on. I've done a bit of online research on materials and come to the conclusion that fiberglass or mineral wool are the only real options for a thin walled structure under 3" in thickness. While there are rigid foams that claim sound dampening properties, I can't seem to find published NRC values, which makes me suspect the claims are dubious.
The usual big box stores seem to carry both fiberglass and mineral wool. However, it is unfaced and would need to be enclosed to prevent shedding fibers (supposedly, directly painting the surface will damage the should dampening properties -- I'm suspicious of this claim as well unless it is so loaded with paint the the interior air spaces are filled). Full sized or even quarter sheets of foil lined fiberglass duct board seem to be hard to come by. The big box stores don't carry it and its difficult to find online, other than part of a precut air return box. The sole online HVAC specialty site I've identified that carries it quoted $195 for a full sheet with residential delivery (s&h was "only" $175 if picked up from a courier's terminal).
I'm honestly flabbergasted as this is such a commonly used material. I would call an HVAC company but its a Sunday. Assuming it isn't summoned by occult means, where is duct board normally purchased? Local HVAC supply? Or do you have to go through an industrial supplier such as Granger, Graybar, etc.? (I just checked and Granger will do local pickup for quarter sheets but they have to order it in....)
The usual big box stores seem to carry both fiberglass and mineral wool. However, it is unfaced and would need to be enclosed to prevent shedding fibers (supposedly, directly painting the surface will damage the should dampening properties -- I'm suspicious of this claim as well unless it is so loaded with paint the the interior air spaces are filled). Full sized or even quarter sheets of foil lined fiberglass duct board seem to be hard to come by. The big box stores don't carry it and its difficult to find online, other than part of a precut air return box. The sole online HVAC specialty site I've identified that carries it quoted $195 for a full sheet with residential delivery (s&h was "only" $175 if picked up from a courier's terminal).
I'm honestly flabbergasted as this is such a commonly used material. I would call an HVAC company but its a Sunday. Assuming it isn't summoned by occult means, where is duct board normally purchased? Local HVAC supply? Or do you have to go through an industrial supplier such as Granger, Graybar, etc.? (I just checked and Granger will do local pickup for quarter sheets but they have to order it in....)