Sustainability Series Session #1: The Many Facets of Insulating a Home

This Thursday, January 17th, is the first of Golden Real Estate’s 6-part Sustainability Series. The topic this week is home insulation. Allow me to introduce the presenters and to share some of what I myself have learned from insulating my own homes and office, and from 17 years of selling homes and being active in the sustainability arena.

We have two great presenters at this month’s session. One is Steve Stevens, whose passion since retiring from Bell Labs has been the conversion of an energy-wasting 1970s brick ranch into a showpiece of sustainability through solar power, energy efficiency and super insulation. In addition to having insulation blown into his attic and walls, he had layers of poly-iso and structural insulated panels added to his exterior walls.  Then he went so far as to dig out and expose his home’s foundation walls so poly-iso insulation could be applied to them. He also constructed “air locks” on all entrances, and built a greenhouse on his south-facing exposure — both extremely effective insulating techniques.

Several years ago when Steve’s home was on the Golden Solar Tour, I shot a 40-minute video in which Steve described his home’s sustainability features — by far the longest of all the videos I have ever created for homes on that annual tour. A link to the video is at JimSmithColumns.com

The other presenter is Dennis Brachfield of About Saving Heat. I’ve known Dennis for over 25 years. His company insulated an office building I owned in Denver as well as a couple homes I have owned.  Dennis is bringing a blower door to this evening’s session in order to demonstrate its function. Using a fan to depressurize a home, a blower door helps to identify the location and extent of air leaks in a building.  Another tool Dennis will illustrate is an infrared camera. By pointing it toward ceilings and exterior walls, the camera shows the difference in surface temperatures, indicating areas that could benefit from air sealing and/or additional insulation. 

I’ll never forget the time 15 years ago when Dennis blew insulation into the exterior walls of a 1945 wood-frame bungalow I had purchased. The home’s gas forced-air furnace kept the ambient temperature at 70 degrees easily enough, but occupants still felt cold.  Dennis pointed out that even if there was insulation in the walls, voids surely existed, due to a combination of sub-par installation and years of settling. I was amazed at how much more comfortable the house was after having insulation blown in to fill all those voids. What I learned from that experience was that cold walls radiate coldness just as effectively as warm walls radiate warmth. Thus, a room with 70-degree air but cold walls feels cold in comparison to a room with the same air temperature but with walls that aren’t cold.

My current home was super-insulated by Bill Lucas-Brown of GB3 Energy.  I invited Bill to join us tonight, but he had a previous commitment. On www.GB3Energy.com, you can watch a Golden Solar Tour video I shot in which Bill describes his weatherization work, which included insulating the crawl space and the rim joist area. It’s very informative.

Here’s a simple way to determine how well insulated your home is.  When you go to bed on a cold winter night and turn your thermostat down — let’s say from 71 to 67 — look to see how quickly the home cools to that lower setting, triggering the furnace.  If it’s less than a couple of hours, you could probably benefit from improved insulation of your home. I’ve started turning our thermostat down an hour or more before bedtime and I’ve found that the temperature doesn’t drop enough to trigger the furnace until 3 a.m. or later.

When your home is that “tight” it’s important to ensure the introduction of enough fresh air to maintain good indoor air quality. For that, consider installing an “energy recovery ventilator,” or ERV. This device replaces a standard vent fan with a heat exchanger that warms incoming fresh air by extracting heat from the interior air that is being exhausted.

The ERV’s function will be explained in our session — or you can Google “energy recovery ventilation.”

Golden Real Estate Launches Sustainability Series

As you may already know, Golden Real Estate is a leader in sustainability, as expressed in the value statement printed on all our yard signs: “Promoting and Modeling Environmental Responsibility.” And most of our agents, including myself, are Certified EcoBrokers, having taken extra training in all aspects of sustainability as it applies to real estate.

We’d like to share what we’ve learned with you, so we’re launching a Sustainability Series that will take place on the third Thursday of every month in our office.  We can accommodate 20 or more attendees in our office, but we will move it elsewhere if the demand exceeds our capacity, so please RSVP. You can do so now for all sessions.

Each meeting will focus on a single aspect of sustainability. Here’s the schedule for the first six meetings (subject to change):

Jan. 17th — Home Insulation — Walls, windows, foundations, crawl spaces, attics. (This is a bigger topic than you might think, but it’s also the cheapest and most effective path to reducing energy consumption.)

Feb. 21st — Home Heating Methods — Forced air, heat pumps, radiant floor, solar thermal, and other technologies.

Mar. 21st — Solar Power — Rooftop and ground-mounted photovoltaic, solar gardens, solar panels vs. solar roof tiles, and home battery storage/backup.

Apr. 18th — Electric Vehicles — What’s here now and what’s coming soon in cars, trucks, motorcycles and more.

May 16th — Sustainable Renovation — What are the more sustainable and popular materials and designs?

June 20th — Water Conservation — The latest concepts and products for conserving water use, both indoors and outdoors.

All sessions are 1 hour long and begin at 5 p.m. in our Golden office or nearby if a larger space is needed based on the number of reservations received. The sessions will be led by experts in the field, although you can count on me to add my own comments!

Go ahead and reserve your seat for any or all sustainability sessions now by sending an email to  Jim@GoldenRealEstate.com. We look forward to producing this informative series!

Golden Real Estate’s Sustainable Practices

1)   Our office produces more energy than it consumes. With our 20 kW of solar panels, we heat, cool and power our office and charge our six electric cars. We also provide free EV charging to the general public, yet our Xcel Energy bill is only $11.26/month.  At our request, Xcel removed our natural gas meter.

2)   We accept polystyrene from the public in our “Styrofoam Corral,” keeping over 200 cubic yards of the material out of the landfill every year.

3)   We use only LED light fixtures and have four “sun tunnels” (skylights) for naturally lighting our office.

Click here to read about our transition to “Net Zero” in our Jan. 4, 2018, column, “Promoting & Modeling Environmental Responsibility.”