What is the difference between open cell and closed cell spray foam
insulation?

 

Both open cell and closed cell spray foam are cutting edge technologies that are light-years ahead of
their competition and are widely considered to be the best choice for private and commercial
applications. Understanding the differences might help you decide the best option for your property.
First, let’s briefly review a few traits they have in common…
Both materials boast the same application method which means that they can be sprayed into the
tiniest hardest to reach areas of your home which effectively “seals” off your home from the outside
environment; both contribute to the strength and value of your structure; both are green materials
because they are non-toxic and reduce energy consumption; both will save you between 30-50% on
your annual energy bills.
As for the differences…
The closed cell system is a much denser finished product and therefore is virtually impenetrable to both
air AND moisture. As a result, it offers a higher overall insulation value and can be used in outdoor and
roofing applications where it will be directly exposed to moisture. It also has a smoother finished
appearance so it is acceptable to use where it will remain visible.
The open cell product, on the other hand, has a rougher finished appearance and is not recommended
for use in areas where it will remain visible or be directly exposed to moisture as it does not provide an
effective moisture barrier.
Due to these differences, the closed cell system typically requires slightly more of an initial financial
investment than open cell.
In short:
If economics are your primary concern then the open cell system might be the choice for you.
For maximum insulation and moisture protection; closed cell spray foam is the ideal option.