![Underinsulated Attic](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214346-5c61bfcdc270e_img2630.jpg?v=1549907744)
Underinsulated Attic
This attic already had R-30 fiberglass insulation batts. But they weren't enough because fiberglass actually traps air inside of it rather than stopping all air and heat movement like cellulose.
![Voids](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214347-5c61bfd573366_img2629.jpg?v=1549907744)
Voids
Insulation Voids can be some of the leakiest spots of the home and you can usually tell that that area is much more uncomfortable below,
![Attic Sill Plate](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214348-5c61bff6b6c53_img2628.jpg?v=1549907744)
Attic Sill Plate
A close up of the top of a wall called the sill plate. This is a major contributor to air leakage all around the home.
![Sill Plate](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214349-5c61bfe5c6704_img2625.jpg?v=1549907744)
Sill Plate
The top of every wall has a similar sill plate which has a large gap around it and also has a lot of wire and pipe penetrations. All of these openings need to be sealed to properly insulate the attic.
![Uninsulated Supply Duct](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214350-5c61bfff7dc52_img2633.jpg?v=1549907744)
Uninsulated Supply Duct
This 'cheese wedge' supply duct is constantly exposed to whatever temperature the attic is, making the duct system work less effectively.
![Sealed Duct](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214351-5c61c016373eb_img3006.jpg?v=1549907744)
Sealed Duct
Now the supply duct is completely encapsulated and protected from the extreme temperatures in the attic.
![Cellulose Insulation](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214352-5c61bfde5c97a_img3012.jpg?v=1549907744)
Cellulose Insulation
Now the attic is insulated more heavily with cellulose insulation, which makes the older fiberglass below it work even better.
![Insulation Retaining Dam](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214353-5c61c0098d825_img3017.jpg?v=1549907744)
Insulation Retaining Dam
This pink board is separating the footprint of the inside of the home from the garage area. You do not need to insulate over a garage in most homes and it can trap airborne VOC's.
![Defined Walkway](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/214354-5c61bfee63e48_img3013.jpg?v=1549907744)
Defined Walkway
A defined walkway to the HVAC unit that has been properly sealed and insulated around it.