Cellulose insulation has been around a long time. Thomas Jefferson used a form of cellulose to insulate his estate, Monticello - where construction began in 1769! What we think of today as cellulose insulation has been in wide use since the 1920's, growing dramatically after WWII. The energy crisis of the 1970's and 1980's led to even greater use of cellulose - and the reputation of cellulose as an insulation that would settle in your walls. That's no longer the case, and it hasn't been for a long time, thanks to dramatic improvements in manufacturing and installation techniques.

 

National Fiber's Cel-Pak is, like most things, a much better product than you could buy in the 1970's. First, it's completely fiberized, which allows for interlocking of the cellulose fibers. Then there's the equipment and techniques used to install it - both radically improved from the 'good old days'.

Today, Cel-Pak is 'dense-packed' in walls at a density of 3.2 - 3.5 lbs of material per cubic foot of space, or more than twice its settled density. This does a couple of things. First, the installation process ensures that cavities are completely filled - no gaps, no voids, no pockets or spaces.


Second, using 3.5 lbs. of material per cubic foot ensures that the material is under slight pressure in the wall cavity. It simply can't settle, because there is no room for it to settle.

 

The  finest cellulose insulation using the best raw materials available, even when they cost a little more, and the best manufacturing technology. No funny smells, no plastic or metal or trash, just clean, pure cellulose insulation that saves you money, keeps you warmer in winter, cooler in summer, and helps protect you from fire, pests and mold.