Here is the important stuff: The R-value of the new insulation is R45... which is about 13 inches of cellulose. They also installed blocking material and air chutes along the perimeter of the attic to contain the insulation and allow for proper ventilation.

Before the new insulation (and after the new roof), in the moderate temps of Spring, it was possible without using air conditioning (AC) to maintain a 15-degree difference between the outside air temperature and the inside air temperature; e.g. at 75°F outside, it would be 60°F.

With the new insulation, we are able to get closer to a 20-degree difference without AC! As an experiment, I set the thermostat to 75°F and each day have watched as the temp in the house has risen throughout the day. Reliably, with an outdoor temperature reaching the upper 80's/lower 90's and with the house starting out at 65°F in the morning, we haven't reached 70°F until about 2:30 pm and the AC hasn't even come on!

Of course, with big, black, long-haired Newfoundland Dogs, 75°F is just too warm, so the thermostat is set to 70°F during the day. But still, that means we're not even using the AC until mid-afternoon. We then let it work in the cooler hours (and cheaper electricity rates) overnight to get back down to 65°F.

Below are pictures and more information about the installation itself.

We had planned to fix the attic insulation problem last year before we found out how much the leaking roof would cost us to repair/replace. We interviewed two companies and I had already decided who I wanted to use for this project. So, when we discovered we could fix the insulation this spring, I contacted Eric Butler of Comfort Solutions and he was kind enough to honor his quote from last year.

Working in an attic in hot weather is really pretty dangerous because traditional roofing material absorbs heat from the sun. But our new roof is an Energy Star qualifying 'cool roof' (see the Roof Gallery page for more info on that) and so we suggested that Eric could schedule us later so he could take care of other customers (who have traditional roofs) during the cooler spring months.

It was late in May when they came out to do our job and it was also the first week that the temps were in the upper 80s to low 90s (°F).
Because of our cool roof, the temp in the attic was about the same as outside instead of being much, much higher).

Even still, Eric and Clint worked only in the mornings (smart guys) and it took them only 3 days to get the attic insulation corrected.

Here is a picture of how the former owner did the insulation in the attic.

What you are looking at is the ceiling drywall and hatch access frame... above that you can see fiberglass bat insulation (looks like 6 or 8 inches to me), then a layer of drywall that sits on top of the ceiling joists and then another 4 inches of blown-in fiberglass insulation.

Now, in theory this may sound like a good idea, but it IS NOT A GOOD IDEA because this set up is a perfect breeding ground for mold between the two layers of drywall.

Was there mold, you ask? Yes, but luckily for us, not very much and we didn't have to remove any of the ceiling drywall.

Eric's quote included removal of all the old fiberglass insulation AND all of the second layer of drywall. Of course, that also meant having an access to the attic that they could fit it all through and I really didn't want them taking it through the house (especially with the access being in my closet).

The gable vent on the south side over the master bathroom was a likely candidate especially since we had been thinking it needed to be a bigger vent for the amount of attic space it vented anyway.

So, first things first, Eric removed the 14x22 vent (which turned out to be installed behind the siding... another pain in our side) and cut an opening big enough for the new 24x36 vent. I had to purchase that size vent on-line because none of the home improvment stores carry such big vents.

FYI (shameless plug): I am very happy with www.BestMaterials.com! Their prices are good, their customer service is excellent and the product arrived when promised in great condition and is very good quality.

Here is the set-up...

On the left is Eric's trailer with the machinery and hose and cellulose, etc. (it's a really big trailer - you only see the front 1/4 of it in the picture).

In the middle is the 20 cubic yard dumpster from our trash company (close up below in case you want their phone number) with the scrim cover weighted down so that the loose fiberglass stays in the dumpster when it comes out of the hose. They usually use water to wet-down the fiberglass, but we only had 20 psi at the field hydrant and so this was their other option.

On the right you can see the opening with the hose coming out and part of the pile of drywall removed at that point.

It was next to impossible to get pictures of they guys working in the attic... so Eric is working on getting me some images of what a standard installation looks like to add to this page.

Here is a close up of the pile of material being removed from the 1st floor attic area. Note the fiberglass paper at the bottom of the picture with the mold. Scary to think that could have been alot worse.

Eric had hoped that the bat insulation would be in good enough shape for him to reuse and that was our understanding from the beginning. Which is the reason we only got a 20 cubic yard dumpster.

Unfortunately, it was not in good enough shape to reuse and so we both agreed it should also go in the dumpster.

Eric discovered that the vent to the 2nd floor attic was also installed behind the siding. So, we ordered another vent (24x30, same size that was already there) and he cut out the old one.

Thank goodness the roofers beefed up the structure of the ceiling over the porch when they fixed the roof. It made it much easier to get the fiberglass and drywall, etc. out of that attic.

Here is a rather interesting thing they found in the 2nd story attic. It's a bumble-bee nest in the loose fiberglass. Eric said its all very sticky. And you can just see a bumble-bee near the center of the picture between a patch of pink fiberglass (to the right) and a kind of yellow/orange tube opening (to the left)... its a very dark spot with a bit of a yellow line on top of the spot.

The roofer had told us the screen on that vent has bad... they had a heck of a time with wasps and bees.

Knowing this, Gary put up a bunch of sticky paper scrolls to help reduce the numbers before the insulation was to be brought out.

Since we had to order another vent, Eric devised a temporary solution to keep out the 'wildlife' and the rain until he can come back out and install the new vent -- once it arrives.

You can't really see it, but there is metal screen material behind the foam board.

I cannot tell you what a relief it is to have have the fiberglass and extra layer of drywall gone from the attic and replaced with blown-in cellulose. I had kept the house very dry all winter to minimize condensation in the attic. Now I can seal up all the paint shrinkage (caused by that dryness) and let the humidifier do its job this winter.

Ah yes, forgot to mention that they found the pink foam board shown at left in the attic... it wasn't sealed in or anything - just laying in the ceiling area over what used to be the porch and is now the entry hall. The insulating properties are not effective if its not sealed.

We are going to be using it in the loft area of the garage... one of our do-it-yourself over time projects.

And, Eric, being the great guy he is, used a couple pieces to insulate the hatch cover in the master bedroom closet (sealed and everything)