Saturday, March 13, 2010

Flash & Blow

When it comes to insulation, there are a lot of options. Spray-in expanding foam is state of the art, but it was cost prohibitive for us to do a full thickness of this, so we opted for a "flash" - meaning a thin layer of foam is sprayed into the stud bays, and then the remainder of the space is filled with something else.

In our case, we went with blown-in fiberglass to fill the remainder of the space between the studs and also used this for the attic space. Hence the "blow"!

So, first is the FLASH...

This is the truck and it's inner workings.

Here is one of our guys in action. The photos were taken from the doorway. We had to stay out of the house during this process.

The next day, Dean was able to go in the house and take lots of photos of the finished job. We think it came out really good!

After just this layer, the house was already feeling much more cozy and quiet, and less like a big hollow box!

But wait, there's more...

Here is the BLOW.

A different crew of guys was sent out for this part.

First, all of the walls and ceilings are covered with this netting that looks like some type of spun fabric. The result looks and feels like we are in a cocoon.

Then the fluffy fiberglass bits are blown into the space between the fabric and the outer walls. They really pack it in!

This insulation system is expected to give us R values of 28+ in the walls and 38 in the ceiling.

What Is an R-Value you may wonder? Here is an explanation that I lifted from the Department of Energy website.

Insulation is rated in terms of thermal resistance, called R-value, which indicates the resistance to heat flow. The higher the R-value, the greater the insulating effectiveness. The R-value of thermal insulation depends on the type of material, its thickness, and its density. In calculating the R-value of a multi-layered installation, the R-values of the individual layers are added.

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