The Pittsburgh Wall Insulation Experts

Are your walls cold? Your home drafty? Have you priced foam and it seemed expensive? Then we have the right solution for you!

Why Use Dense Pack Cellulose as your Wall Insulation?

In the last 15 years, the process of ‘dense packing’ walls with cellulose insulation has become the established best practice for insulating the walls of existing homes. When installed under pressure, cellulose insulation will insulate a 2×4 wall to approximately R-15, eliminate cold drafts, make your home much quieter by sharply reducing street noise, and NEVER settle over time.  With a process that is far more proven AND far less expensive than injection foam, you will significantly improve your home’s energy efficiency, year-round comfort!

How Will Dense Pack Wall Insulation Affect my Homes Energy Efficiency?

2-insulating-exterior-wallUsing dense packed cellulose for your wall insulation needs achieves two big energy-efficiency-improving functions. First it insulates 2×4 stud bays to an approximate R-Value of R-15. This improvement alone dramatically reduces heat loss. But the other thing achieved when cellulose insulation is dense packed into your walls is that it permanently tightens your home’s “air barrier.” This air-sealing characteristic drastically reduces air infiltration year round, further cutting energy loss. The overall impact of insulating your exterior walls with the dense pack cellulose process should be a 20-30% reduction in your utility bills.

How will the Dense Pack Wall Insulation Process Make my Home More Comfortable?


Infrared scan shows the dense pack cellulose installation to be perfectly distributed between stud bays

The effect it will have on your home’s comfort will be as instant as it will be dramatic. The first thing you’ll notice is that cold winter drafts will virtually disappear! Densely packed cellulose insulation in your exterior walls creates a near impenetrable barrier to cold winter wind gusts!  Next you will notice that seasonal hot and cold spots (from lack of insulation) will vanish. This not only moderates your home’s interior temperatures, but makes your exterior walls seem as warm and cozy as your interior walls!

How Does it Work?

1-Dense-packing-cellulose-exterior-wallsWhen installing cellulose insulation via the dense pack method, one 2″ diameter access hole is drilled at the base of each stud bay in your wall (about every 16″ inches). A fill tube is then inserted into the access hole and fed into the bay until it hits the top of the wall. Our powerful machine is then turned on, forcing the insulation to literally “flow” around obstructions like wires, outlet boxes, and plumbing pipes, as well as into the small holes, cracks, and access points in your wall. When the fill tube is finally removed from the bay, the insulation inside is packed so tightly that your fingers cannot poke through it. This is how dense pack cellulose insulates and reduces air infiltration into your home! When the work is complete, all access holes are sealed / patched and siding is replaced if work is done from the outside.

Common Questions:


“Another insulation guy came out. He’s also going to use cellulose insulation, but he didn’t talk about or explain dense pack cellulose at all. Is that important?

Yes! The “old school” way of installing cellulose insulation, where it is done either through brick, or when 2 small holes are drilled on the inside wall, leads to settling. When not packed to 3.5 lbs per sq ft of density, cellulose insulation settles by 15-20%. This means that in an 8-foot stud bay, you will likely have no insulation in the top 15-20″ of your wall, often where it is most important.

When not dense packed, you also receive none of the important air-sealing benefits of cellulose (which eliminates drafts), and noise reduction is diminished. In the past few years, I have personally re-insulated many homes where the “old school,” shoddy process had been done. We were called out because the homes had become uncomfortable and expensive to heat and cool again.

Why Has Dense-Pack Cellulose Become the Established Wall Insulation Leader for Existing Homes?

Dense pack cellulose has become the established leader, among building science professionals and energy auditors, because of its relentlessly tested and proven track record. According to David Keefe of Home Energy Magazine, “The air sealing benefits can be impressive. It is not unusual to reduce overall house leakage by 30% to 50% by dense-packing walls and other closed-in cavities.” It is also incredibly “green,” non-toxic, and installs reliably every time.

What About Injecting Foam into my Walls?

The injection foams that are currently on the market these days are at best unproven over time and at worst expensive and highly prone to “shrinkage.” When first getting started as an insulator I actually worked for two companies specializing in foam injection. However, after installing the product for 3 months in the field I decided not use it with my own business due to shrinkage issues I personally witnessed and its significant expense. Unlike the excellent spray foams commonly seen on TV, injection foams are water based, not polyurethane based.

Foams like Tripolymer have not been subjected to nearly the degree of testing within the building science community that dense pack cellulose and spray polyurethane foam have been. So why choose something that is both expensive and largely untested if you can choose an insulation (cellulose) and method (dense packing) that is less expensive, greener, and preferred by most building scientists and energy auditors across the United States?

To Summarize:

  1. Dense pack cellulose insulates a 2×4 wall to approximately R-15, making the home warmer in winter, cooler in summer.
  2. Will sharply reduce air infiltration, thus eliminating cold drafts.
  3. Will sharply reduce street noise, thus making the home much quieter.
  4. Dense packed cellulose will NEVER settle over time.
  5. The process is SIGNIFICANTLY less expensive than foam
  6. Cellulose insulation is the greenest” insulation you can use in your home! It is made from recycled paper, requires a fraction of the energy to manufacture that fiberglass does (less embodied energy), and is completely non-toxic.