Just finished up an attic insulation job on a home addition that had a major issue hiding under the flooring.
The attic DID have insulation — but whoever built it laid plywood down over it to make it “walkable,” and never insulated underneath those sections. So you basically had large areas of the attic with zero thermal protection.
That’s why the room couldn’t hold temperature. AC was fighting a losing battle.
We corrected it the right way:
Pulled up the plywood decking
Installed proper insulation underneath
Re-laid the plywood so the space is still usable and accessible
Cleaned up airflow and thermal gaps that were causing the heat issue
Now the space will actually perform like it’s supposed to — stable temps instead of constant overheating.