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To remove a blown-in insulation, a ULPA or a HEPA vacuum is preferred. It will suck the insulation out of the cavity or the wall it is in. A regular vacuum does not suck up the insulin as a whole and will be successful in sucking up fragments of the fiberglass only. 

You can definitely pull over a new insulation over an old one for maximum safety, but there are a few considerations you need to take beforehand. The old insulation needs to be sucked in case it is wet, has a mold or asbestos or was attacked by a rodent. 

If you are going for an installation of a new insulation without shedding the old one then it needs to be done with a vapor retarder. A vapor retarded placed on the top or in between the two layers of insulation can prevent moisture from being trapped within. 


With an R value of 2.2 to 3.8 per inch, cellulose is one of the most effective materials for blown insulation. On the contrary, it gets moldy when exposed to moisture. You need an easy to use rental machine for it to blow evenly and spread manually. 

Mineral wool, cotton and fiberglass can also work as fill-in materials but cellulose by far has shown the best results for blown insulation. Blown-in cellulose insulation is perfect for nooks and corners including pipes, tight voids or awkward framing. 

Generally, the insulation installed in your attic is roughly 12 inch thick.  The thicker insulation you get, the better. It is also common for an attic to have an efficient insulation as thick as around 15 inches of 20 inches. If your insulation is barely a few inches thick, it will lose its purpose. 

Moreover, the International Association of Certified Home Inspectors state that a house wrap insulation, wrap tape or spray foam insulation can last as long as 80 years. Similarly, a cellulose insulation being a premium material for insulation can last for as long as 100 years. 


Insulation can lose its effectiveness before it is expiry due to various reasons.  If your roof has underwent water damage, it may leak occasionally and degrade your insulation. This causes mold to form on your insulation which makes the insulation break down faster. 

Other than that, there are a lot of reasons due to which your insulation might need a change. Some of this include: 

  • Constantly changing indoor temperature
  • High energy bills 
  • Wet Insulation 
  • Animal Infestation 
  • Indoor Drafts 

Quick & Reliable Rental Services

Finding the right contractor for a thorough job is draining at best. At Insulation Vacuum Rental, we provide turn-key solutions for all your insulation removal needs. Our experts are a call away and the procedure is painless to say the least. We offer in-home free estimates, we will give you a free quote while keeping in mind your insulating needs.