Thursday, September 25, 2008

Tyvek Time

We've reached the stage where the Tyvek® weather-resistant barrier goes on to the exterior of the home. It helps combat water, moisture and air infiltration.
Wind-driven rain and moisture can saturate walls, creating a breeding ground for mold, mildew and wood rot. The properties of DuPont's Tyvek® help prevent this. Air infiltrating from outside can create cold or warm spots while increasing heating and cooling costs.
The Tyvek® acts like a windbreaker and wrapped over the sheathing and under the exterior siding—cut out around windows and doors and taped securely at the seams—resists air infiltration and water intrusion and makes for a more comfortable, energy-efficient home or building.

Which of course is what our new "Switzer Green Home" is all about!

Tuesday, September 23, 2008

Meeting with Bob and the Builder

A few days ago we had our first on-site meeting with Bob, the architect and Jay, the builder.

We went over everything that has been done so far and decided on a few minor changes.

We decided to make the pantry a little smaller, which increases the size of the guest bedroom (Dad will like that).
And an arched hallway will be added from the foyer to the guest bathroom. Jennifer, Bob's wife and office manager, suggested swapping where the master shower and one of the vanities were located which would give us the larger open-style shower we wanted and so we approved that change.

We also determined that the upstairs hallway needed to have one of the ceiling beams restructured.

Later we also decided that we needed to swap some of the exterior doors upstairs.

All the changes were minor and will not slow construction. Here are some pictures we took after the meeting.

You can see the progress continues to move right along. The framing should be done by the end of next week and then roofing, siding, and windows go in.

Stay tuned...

Saturday, September 13, 2008

Second Floor Begins...

The Structural Insulated Panels are going up on the second floor. Before you know it, we'll see the roof!

Tuesday, September 9, 2008

Framing Has Started...

The framing has started on the first floor and will need to be mostly finished before the second floor SIPs can be installed. Here are the "green" things that the framers are responsible for:

1. WASTE: reduce waste generation to a level below the industry norm, i.e., reduce construction waste to 2.5 lbs/sf of conditioned floor space (not including waste diverted for reclamation or recycling) = a maximum of 10,000 lbs of waste for the entire project going to the landfill.
a.No wood or wood products go in the dumpster – goes into the mulch pile
b.Nails, plastic wrap, caulking tubes, and things of this nature go in the dumpster
2. Reduce overall waste factor (of framing wood) to <> 19.2” oc where possible
3. Use low VOC (Volatile Organic Compounds) for caulking or sealants used in the framing process.

Tuesday, September 2, 2008

Question and answer

Ray Cohen wrote:

Hello, Mike and Maggie. I was just reviewing your Green Home Blog. I know you are happy to be able to actually see progress being made. I was wondering if you might know what the R value is in the SIP wall panels containing the foam insulation and also what the actual thickness would be. Just curious. I hope you guys are doing well. Goooo Cocks!


Here is the answer from our architect:

The SIP panels have a true r-value of 17 + siding and interior finish which adds maybe 2. Whereas fiberglass insulation has an r-value of 13 for the same thickness wall however the overall performance of a conventional wall has an air loss factor and thermal bridging due to studs every 16” on center. The result is that the r value of a 4 ½” SIP wall acts like an 8” stud wall.”

The SIP walls are 4 1/2" thick and the roof SIP's are 10 1/2".