Can You "Superinsulate" It?
Most energy-conscious people know that when it comes to home insulation, more is better. But homeowner Alex Cheimets is literally thinking outside the box with his "superinsulation" plan.
Rather than just blow in a few more inches of standard cellulose insulation in his attic, Cheimets is in the throes of an ambitious project to seal the outside of his home with two layers of insulating foam board.
Known in building industry as a superinsulated home, the foam blanket will keep hot (and cool) air in, and also block the cracks that let in outside air. If all goes as hoped, he will cut oil consumption by 70 percent at his 80-year-old, two-family home in Arlington, Mass.
For Cheimets, superinsulation has become a bit of a hobby, one that's been frustrating at times. He set off two years ago with good intentions --conserving energy for the benefit of his pocketbook and the environment. But like a cutting-edge user of new technology, he has had to overcome a number of unexpected hurdles, notably a lack of basic information and experienced contractors.
Luckily, Cheimets is persistent, organized, and, he admits, "a little obsessed."
Earlier this fall, contractors began work on the job, which is expected to be finished early next year. Along the way, it's become a pilot project that some hope will become a model for dramatically lowering energy consumption in the millions of existing homes.
Leading-edge green
Being a guinea pig for superlinsulated homes has paid off in some ways even before the home's co-owners receive next winter's heating bills.
Because his project is considered a model for retrofitting homes to be energy efficient, suppliers have donated windows and materials, halving the estimated price tag of $100,000.
State officials are keenly interested because his experience could figure into future building codes and zero-energy home initiatives. Ian Bowles, the secretary of energy and environmental affairs for Massachusetts, visited the construction scene where he spoke to a camera crew from Planet Green's Renovation Nation cable show.
At the national level, making homes energy efficient is becoming serious business. Worldwide, it is estimated that buildings account for between 30 percent and 40 percent of energy use.
As part of a planned stimulus spending project, President-elect Obama said that money will be available to retrofit schools and government buildings to be more energy efficient. During his campaign, he called for lawmakers to fund a program to weatherize homes of low-income people, considered a cheap way to reduce energy use in homes.
Project breakdown
The genesis of the superinsulation project was simply that Cheimets felt cold in his two-family home. He tried a number of low-cost air sealing tricks like caulking and replaced some windows but wasn't satisfied.
He and the building's other owners also knew that they had to reshingle the building at some point. Cheimets, a engineer who works in the appliance industry, had heard of superinsulation and started researching it.
"We knew that reshingling was a once-in-a-lifetime job, so we thought, let's do it right," he said. "And once we decided to do the research on superinsulating, things moved along quickly."
Frustrated by the lack of available information, he contacted officials at the Massachusetts Department of Energy Resources who offered him some guidance on technical aspects of the project. Cheimets also discovered Boston-based Building Science Corp., a company which specializes in superinsulation and had done a handful of home retrofits.
Building Science recommended Massachusetts green building contractors, Synergy Companies Construction, who are now in the middle of the project.
Already two layers of insulating board -- seven inches worth -- have been added on top of the existing roof, giving it an R-value of 59. On the walls, there are also four inches worth of foam board. In addition to the existing cellulose insulation, the walls now have an R-value of 39. New energy-efficient windows are being added as well.
The R-value measures how well insulation can keep heat from penetrating a structure, with a high R-value meaning more insulation. How much a building needs depends on the region and type of construction, according to the Department of Energy. But Cheimets' home will significantly exceed federal recommendations of R 49 for an attic (which is not commonplace) and R 13 for walls in Massachusetts.
In addition to insulating, the contractors are trying to seal the home, an often-overlooked aspect to weatherizing. Cracks between the foam boards are taped and contractors are adding foam insulation in crawl spaces and on the basement ceiling.
Cheimets is pleased to see the superinsulation project finally see the light of day, but he admits some aspects make him nervous.
By sealing the air, the building runs the risk of trapping moisture inside the walls, particularly during the winter. He said experts at the state and at Building Science Corp. told him that air quality and moisture should not be a concern given that enough air manages to get indoors.
To be sure, they are installing two ventilation systems (an air-to-air heat exchanger) to recycle the air, which will be most important during the winter. There are also carbon monoxide monitors.
Being part of a pilot project, Cheimets will need to gather data on humidity and temperature levels and how much oil he is using. His home is being equipped with four sensors from Onset Computer, as are his neighbors on both sides (both scientists). Once a month, they will download data using an USB connection to a laptop and report it to the state.
He is considering alternatives to his oil furnace, such as a geothermal heat pump, or getting solar panels.
From an environmental perspective, Cheimets sees some irony in the fact that he's using a garage-full of oil-based foam insulation to save oil in his home. But he thinks superinsulation is a way to make a big leap in energy conservation -- potentially in stages -- without having to rebuild or alter the look of existing homes.
"I may be a little obsessed but I'm not insane. I wouldn't do anything if I thought it would look horrible," he said.
By Martin LaMonica
CNET Rather than just blow in a few more inches of standard cellulose insulation in his attic, Cheimets is in the throes of an ambitious project to seal the outside of his home with two layers of insulating foam board.
Known in building industry as a superinsulated home, the foam blanket will keep hot (and cool) air in, and also block the cracks that let in outside air. If all goes as hoped, he will cut oil consumption by 70 percent at his 80-year-old, two-family home in Arlington, Mass.
For Cheimets, superinsulation has become a bit of a hobby, one that's been frustrating at times. He set off two years ago with good intentions --conserving energy for the benefit of his pocketbook and the environment. But like a cutting-edge user of new technology, he has had to overcome a number of unexpected hurdles, notably a lack of basic information and experienced contractors.
Luckily, Cheimets is persistent, organized, and, he admits, "a little obsessed."
Earlier this fall, contractors began work on the job, which is expected to be finished early next year. Along the way, it's become a pilot project that some hope will become a model for dramatically lowering energy consumption in the millions of existing homes.
Leading-edge green
Being a guinea pig for superlinsulated homes has paid off in some ways even before the home's co-owners receive next winter's heating bills.
Because his project is considered a model for retrofitting homes to be energy efficient, suppliers have donated windows and materials, halving the estimated price tag of $100,000.
State officials are keenly interested because his experience could figure into future building codes and zero-energy home initiatives. Ian Bowles, the secretary of energy and environmental affairs for Massachusetts, visited the construction scene where he spoke to a camera crew from Planet Green's Renovation Nation cable show.
At the national level, making homes energy efficient is becoming serious business. Worldwide, it is estimated that buildings account for between 30 percent and 40 percent of energy use.
As part of a planned stimulus spending project, President-elect Obama said that money will be available to retrofit schools and government buildings to be more energy efficient. During his campaign, he called for lawmakers to fund a program to weatherize homes of low-income people, considered a cheap way to reduce energy use in homes.
Project breakdown
The genesis of the superinsulation project was simply that Cheimets felt cold in his two-family home. He tried a number of low-cost air sealing tricks like caulking and replaced some windows but wasn't satisfied.
He and the building's other owners also knew that they had to reshingle the building at some point. Cheimets, a engineer who works in the appliance industry, had heard of superinsulation and started researching it.
"We knew that reshingling was a once-in-a-lifetime job, so we thought, let's do it right," he said. "And once we decided to do the research on superinsulating, things moved along quickly."
Frustrated by the lack of available information, he contacted officials at the Massachusetts Department of Energy Resources who offered him some guidance on technical aspects of the project. Cheimets also discovered Boston-based Building Science Corp., a company which specializes in superinsulation and had done a handful of home retrofits.
Building Science recommended Massachusetts green building contractors, Synergy Companies Construction, who are now in the middle of the project.
Already two layers of insulating board -- seven inches worth -- have been added on top of the existing roof, giving it an R-value of 59. On the walls, there are also four inches worth of foam board. In addition to the existing cellulose insulation, the walls now have an R-value of 39. New energy-efficient windows are being added as well.
The R-value measures how well insulation can keep heat from penetrating a structure, with a high R-value meaning more insulation. How much a building needs depends on the region and type of construction, according to the Department of Energy. But Cheimets' home will significantly exceed federal recommendations of R 49 for an attic (which is not commonplace) and R 13 for walls in Massachusetts.
In addition to insulating, the contractors are trying to seal the home, an often-overlooked aspect to weatherizing. Cracks between the foam boards are taped and contractors are adding foam insulation in crawl spaces and on the basement ceiling.
Cheimets is pleased to see the superinsulation project finally see the light of day, but he admits some aspects make him nervous.
By sealing the air, the building runs the risk of trapping moisture inside the walls, particularly during the winter. He said experts at the state and at Building Science Corp. told him that air quality and moisture should not be a concern given that enough air manages to get indoors.
To be sure, they are installing two ventilation systems (an air-to-air heat exchanger) to recycle the air, which will be most important during the winter. There are also carbon monoxide monitors.
Being part of a pilot project, Cheimets will need to gather data on humidity and temperature levels and how much oil he is using. His home is being equipped with four sensors from Onset Computer, as are his neighbors on both sides (both scientists). Once a month, they will download data using an USB connection to a laptop and report it to the state.
He is considering alternatives to his oil furnace, such as a geothermal heat pump, or getting solar panels.
From an environmental perspective, Cheimets sees some irony in the fact that he's using a garage-full of oil-based foam insulation to save oil in his home. But he thinks superinsulation is a way to make a big leap in energy conservation -- potentially in stages -- without having to rebuild or alter the look of existing homes.
"I may be a little obsessed but I'm not insane. I wouldn't do anything if I thought it would look horrible," he said.
By Martin LaMonica
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Now, I have R60 in the attic, an additional R30 between the 3rd floor and the second floor, and R19 in the walls on the 3rd and second floors. The 100+ year old windows have been replaced with Anderson Woodwright new construction windows because every window is a different size. I used 17 tubes of silicone caulking and six cans of Great Stuff foam just in my master bedroom sealing everything.
Previously all three floors of the house were equally cold; now there is a 21 degree temperature difference between the first floor with no insulation and the mostly remodeled 2nd and 3rd floors.
Now, I have R60 in the attic, an additional R30 between the 3rd floor and the second floor, and R19 in the walls on the 3rd and second floors. The 100+ year old windows have been replaced with Anderson Woodwright new construction windows because every window is a different size. I used 17 tubes of silicone caulking and six cans of Great Stuff foam just in my master bedroom sealing everything.
Previously all three floors of the house were equally cold; now there is a 21 degree temperature difference between the first floor with no insulation and the mostly remodeled 2nd and 3rd floors.
Now, I have R60 in the attic, an additional R30 between the 3rd floor and the second floor, and R19 in the walls on the 3rd and second floors. The 100+ year old windows have been replaced with Anderson Woodwrights because every window is a slightly different size. I used 17 tubes of silicone caulking and six cans of Great Stuff foam just in my master bedroom sealing everything.
Previously all three floors of the house were equally cold; now there is a 21 degree temperature difference between the first floor with no insulation and the mostly remodeled 2nd and 3rd floors.
So tell me how many years it would take to see a return on this investment? About a century?
Conserving energy and saving money is a nice ideal, but this sure isn''t saving any money, and how about the environmental impact of making all that foam and windows?
I ride my bike to work and try to be environmentally conscience about things, but I am really irked by the psuedo-environmentally friendly stupidity I see.
I have an especial disdain for the rich hypocrites like Al Gore who claim to compensate for their wasteful lifestyles by purchasing carbon credits.
The only way you can claim to be eco-friendly is by actually using less energy and wasting less resources. Al Gore and all his cronies don''t qualify and never will be legitimate.