Insulate Pex In Attic

Foam is used most commonly and generally works well.

Insulate pex in attic.

There are no manufacturer guarantees it won t fail. While pex does not ordinarily burst in the cold the water in the pipes can still freeze. You are referring to possibilities. The foyer is 16 long and is off the kitchen it isn t heated directly but is part of the house.

I find no problem with it being in the attic as long as it is properly insulated. Because the advantage of pex is that the pipes are easily curved around obstacles etc i bet insulation coverage wouldn t be more than 90 in even careful installations. Ideally in the attic you would want to run the pipe as close to the ceiling as possible below the insulation. Tips for insulating pex pipes.

I have a run of pex in my attic that freezes when the outdoor temps falls to about 15 degrees. Pex tubing is susceptible to cracking when it s exposed to freezing temperatures or ultraviolet light. I would rather have a line break in the attic than under a concrete slab. Keep the tubing shielded from both hazards to increase its life.

Also according to ashrae research 2015 hvac applications page 50 4. I plan on running pex pipes both hot and cold across 16 feet of unheated attic space above a foyer. Insulating the pex helps prevent conduction sweating. Once my attic warms up after a few hours the next day the pipe thaw.

Basically the r value of pex insulation does not meet energy code requirements for piping insulation. If all plumbing lines are within the envelope and a recirculating pump is installed what might the payback period be for insulating pex hot water lines. Table 1 also shows that all of the plastic pipes tested to date exhibit moderately to significantly higher heat loss rates than comparably sized copper pipes when tested uninsulated in air. In any case insulation would serve no purpose whenever the wait.

How to insulate pex. It is important to insulate pex pipe in an attic particularly in cold weather areas. Because pex piping is flexible it is often used in angles loops or other non linear shapes which makes it imperative to have equally flexible insulation material. Should pex water supply lines in attic be insulated through its entire length in the attic.

It is important to choose the right insulation material. I suppose you don t have freezing issues in fl but if you run it above the insulation the water in the pex will heat up more than if it is run close to the ceiling. The builder insulated about 6 feet of the lines from the water heaters located in the attic but did not insulated the entire lengths. It is usually colder than the rest of the house mostly due to the cat door and slider the dogs go in and out of.

Pex pipe bottom line. It s smart to insulate water supply piping exposed to.