Fluffy, Foamy, or Fiberglass? Picking the Right Attic Insulation
                     Attic  insulation  is  a  crucial  factor  in  maintaining  a  comfortable  indoor
temperature while keeping energy costs in check. Without proper insulation,
heat escapes in the winter and seeps in during the summer, making your
HVAC system work harder than necessary. Many homeowners struggle with
choosing  the  right  type  of  insulation,  as  each  option  has  its  own  set  of
advantages and drawbacks. Fiberglass, spray foam, and blown-in insulation
are among the most popular choices, each serving different needs depending
on the home’s structure, climate, and budget. 
Fiberglass Insulation | The Classic Choice 
Fiberglass insulation has been a go-to option for decades. Made from fine
glass fibers woven into batts or rolls, it is known for its affordability and ease
of  installation.  Many homeowners  opt  for  fiberglass  because it  provides a
decent  level  of  insulation  at  a  relatively  low  cost.  However,  over  time,
fiberglass can settle and lose some of its effectiveness. It also doesn’t provide
a strong air seal, meaning air leaks can still  occur if not properly installed.
Despite  its  limitations,  fiberglass  remains  a  solid  choice  for  homeowners
looking  for  a  budget-friendly  insulation  solution  with  straightforward
installation. 
Spray Foam Insulation | The High-Tech Solution 
Spray foam insulation is the premium option for  those looking for  superior
energy efficiency and air sealing. When applied, the liquid foam expands to fill
gaps and cracks, creating a tight seal that prevents air leakage. This makes it
highly  effective  in  extreme  weather  conditions,  as  it  prevents  drafts  and
maintains  stable  indoor  temperatures.  However,  spray  foam is  one of  the
more expensive insulation options,  and it  requires professional  installation.
Some homeowners also have concerns about the chemicals involved in the
process,  as  off-gassing  can  occur  during  installation.  Despite  the  higher
upfront  cost,  spray  foam  insulation  offers  long-term  energy  savings  by
significantly reducing heating and cooling expenses. 
Blown-In (Fluffy) Insulation | The Flexible Option 
Blown-in  insulation,  also  known  as  loose-fill  insulation,  consists  of  small
particles of either cellulose or fiberglass that are blown into attic spaces. It is
particularly useful for filling irregularly shaped or hard-to-reach areas, making
it  an  excellent  option  for  older  homes  with  unconventional  attic  layouts.
Cellulose, which is made from recycled paper, is an eco-friendly alternative
that provides good thermal resistance. However, blown-in insulation can settle
over  time,  which  reduces  its  overall  effectiveness.  To  maintain  proper
insulation levels, homeowners may need to add more material  periodically.
While it may not have the air-sealing properties of spray foam, it remains a
great choice for those looking for a flexible and environmentally conscious
solution. 
How to Choose the Right One for Your Home 
The  best  insulation  for  your  attic  depends  on  multiple  factors,  including
climate, home structure, and budget. Homes in colder climates benefit from
insulation  with  higher  R-values,  while  homes  in  warmer  regions  need
insulation that resists heat transfer effectively. The budget also plays a major
role—fiberglass  is  the  most  affordable,  blown-in  insulation  is  moderately
priced, and spray foam is the most expensive but offers the highest energy
savings in the long run. Homeowners should also consider whether they want
to  install  the  insulation  themselves  or  hire  professionals.  Fiberglass  and
blown-in insulation can often be installed as DIY projects, while spray foam
requires professional expertise. 
Final Thoughts 
Choosing  the  right  attic  insulation is  an  investment  that  pays  off  through
improved comfort and lower energy bills. No matter which option you choose,
proper  installation  is  key  to  maximizing  insulation  performance.  Some
homeowners even combine different types of insulation to get the best of both
worlds—such as using fiberglass batts with a spray foam air-sealing layer.
Before  making  a  final  decision,  it’s  beneficial  to  get  an  energy  audit  to
determine the best insulation strategy for your home. With the right insulation,
you can enjoy a more comfortable living space and significant energy savings
year-round. 
Johnson's Insulation 
(510) 660-0455 [email protected] johnsonsinsulation.green 1721 Broadway, Ste. 201,
Oakland, CA 94612