This was basically a full attic reset.

We removed all of the old insulation, air sealed the attic floor to make everything airtight, then installed brand-new insulation throughout the attic once the prep work was finished.

Honestly, once we got the old material out, you could see pretty quick why the attic needed redone properly.

Old insulation only tells part of the story

A lot of people think insulation itself is always the main problem.

Sometimes it is. Sometimes it isn’t.

Once old insulation settles, gets moved around over the years, or ends up covering open gaps and penetrations, the attic starts leaking air constantly even if insulation technically still exists up there. Kind of like wearing a winter coat with the zipper halfway open.

That part mattered.

Air sealing came before anything else

This is the step we spend a lot of time explaining around Chicago-West, Elmhurst, and Oak Park because people usually focus only on insulation depth.

But if the attic floor is still leaking air, adding fresh insulation on top does not really fix the root issue.

So, after removing all the existing insulation, we air sealed the attic floor throughout the space before installing the new material. Small penetrations, openings, top plates, gaps around fixtures. All the little stuff adds up fast in an attic.

You could actually feel cooler air moving in certain spots before sealing started.

Not great.

Removing insulation is usually the messiest part

Especially older insulation.

The vacuum hoses were running most of the day on this one and the attic had that dry dusty smell once everything started getting disturbed. That’s usually how it goes once older insulation starts coming out after sitting there for years.

And honestly, attics always look bigger from the access hatch than they actually feel once you’re crawling around inside them for hours.

Long day up there.

New insulation goes in differently once the attic is sealed

That’s the part people usually do not see.

Once the attic floor is properly air sealed first, the new insulation system actually performs the way it’s supposed to. Otherwise, air just keeps moving underneath or through the insulation layer itself.

We installed fresh new insulation evenly across the attic after the air sealing work was completed.

Simple process when it’s done in the right order.

One thing we noticed during the job

There were a lot more open leakage points than we originally expected once the old insulation came out.
Honestly, that happens pretty often. Insulation hides problems. Once everything gets vacuumed clean, the attic floor starts telling the truth a little bit.

Especially around older attic penetrations and fixture openings.

That was it.

Kind of one of those jobs where starting over makes sense

Sometimes patching sections or adding insulation on top of old material works fine.

Sometimes the better move is just resetting the whole attic properly from the beginning. Remove everything. Air seal it correctly. Install fresh insulation evenly across the space and know it was done right underneath.

This ended up being one of those jobs.

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