Flex Ductwork In Attic

The official recommendation from the adc is that flex ducts should sag no more than 1 2 per foot of length between supports. They just tear through them smash them climb on. The higher in the attic the hotter it is.

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The right choice in ductwork for you likely depends on the specifics of the attic above your in law suite.

Flex ductwork in attic.

Secure the webbing to the joist by hammering a 2 inch roofing nail through the webbing and into the side of the joist. Ducts up high get tore up. Here are some advantages for each. The lower the cooler it is.

Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water. Flex ducts themselves do not sweat however if the connection points are not sealed correctly and duct leakage is occurring then you can get sweating at those points. Just blow the attic to r 38 and over the top of ducts if needed. People can not carry ladders up into a attic and them place them onto 1 1 2 wide boards so they can climb over ducts.

Flex ducts on the other hand are smaller and tube shaped like giant shiny worms. It was new when the ac was put in 7 years ago. Blown in insulation is cheap. Hold the loose end of a roll of duct support webbing against the side of a roof joist sitting directly above the flex.

The supports need to be at the manufacturer s recommended spacing but no longer than 4 maximum. The attic ductwork is flex duct work. Ducts are to be part of what is inside the house not part of. The really bad news is that with old metal duct systems the only option is replacement of the ducts to stop the rain in the attic.

They both have advantages and disadvantages. The straps that hold up the flex duct need to be no less than 1 5 wide. The attic is a hot dirty nasty place. This type of duct means a smoother interior with better air flow insulation applied on the outside to cut down on fibers getting into the system and a durable shell not easily punctured by rodents or uv light.

The next most typical type of duct systems is made of flexible duct. Not part of what is in the attic. Flexible duct is a plastic tube that is reinforced with wire and then insulated on the outside. How to hang flex duct in an attic 1.

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