Category: Insulation Tips

We recently got a call from a homeowner who wanted their attic insulation replaced. Their old fiberglass insulation was wet and dirty and needed to be replaced. Not only that, it had originally been installed upside down, leading to moisture problems.  We weren’t surprised by this situation as we get calls for help all the time. Our advice is to do it right the first time. That's why we say, "Don’t use fiberglass insulation!!

In cold climates fiberglass just won’t do

Fiberglass insulation is significantly cheaper than spray foam insulation, but it is also less effective, especially in extremely warm conditions. Summers in New England regularly hit above 100°F. Spray foam is more expensive, but you get your money back within five years.[1]

Used in roughly 85% of American homes, fiberglass insulation is the most common form of home insulation. Spray foam insulation has less market share, but is increasing in popularity.[2]  Why? Because it is MUCH better and you pay once. Professional installation is required for spray foam insulation, but hey, would you have the plumber fix your broken tooth?

Energy efficiency of fiberglass vs. spray foam

The composition of fiberglass insulation does not stop air from passing through it. On average, more than 30% of heat or air conditioning escapes where fiberglass insulation is installed. If poorly installed, fiberglass can also leave spaces around fixtures, allowing even more heating or cooling to escape.

Spray foam insulation fills all spaces, preventing air from escaping. It acts as an air barrier. Spray foam insulation is significantly more efficient than fiberglass and has a higher R-value.[3]

Problems with fiberglass

Incorrect installation – Failing to fill the wall cavities and compressing the batts are two of the most prevalent installation mistakes. They’re also the leading causes of poor performance, which is why some green building consultants, architects, and builders recommend other products. Their answer for total fill: cellulose.[4]

In a recent project we repaired, the insulation was originally installed incorrectly. As a matter of fact, because it was installed incorrectly, the vapor barrier (the brown paper side) couldn’t do its job – to trap moisture against the floor. The raft paper has to be facing the conditioned space, in this case the attic floor.

It’s cheap – That means that many home builders can offer it to reduce the cost of the home. But don’t be fooled. You may pay less now, but you’ll pay more later, for sure.

Rodents love it! – Rodents prefer safe, warm, and sheltered environments – making the inside of your walls and attic the ideal home. Insulation that can be found in these places can be even more inviting since it is a source of warmth for the scurrying critters. The malleability of fiberglass insulation makes it easy for a nest to be made, and insulation can be moved where ever needed. Once one nest is established and a rodent is comfortable enough, a colony of rodents can soon follow. With the displacement of materials, you could see a difference in the heating as warm air can now escape from your house in those areas.[5]

Length of life

Fiberglass insulation can last several years, but during that time it loses its effectiveness and you never have a complete seal against air flow. The level of effectiveness also depends if any moisture is present. You may need to replace this type of insulation or add to it as it settles and deteriorates over time.

Spray foam, on the other hand, can last as long as 80 years or more. It’s a much more permanent and effective option. While you’ll pay more up front, the longevity and efficiency of spray foam make it a very cost-effective option. [6]

In closing, when it comes to which is best in the spray foam insulation vs. fiberglass debate, spray foam wins, hands down. If you’re a DIYer, you may be used to installing fiberglass insulation. But if you’re looking for something that will last a lifetime, let a professional install spray foam. [7]

[1] The Green Cocoon (2019). Invest in Insulation. Retrieved from thegreencocoon.com.
[2] Diffen (2019). Fiberglass Insulation vs. Spray Foam Insulation. Retrieved from diffen.com.
[3] Diffen, Fiberglass
[4] Probuilder (2015). Home Insulation Choices: Fiberglass, Cellulose, or Foam? Retrieved from probuilder.com.
[5] Apple Pest Control (2017). Rodents and Your Insulation. Retrieved from applepestcontrol.com.
[6] Good Life Energy Savers (2018). Spray Foam Insulation vs Fiberglass: What’s the Difference? Retrieved from goodlifeenergysavers.com.
[7] Good Life Energy Savers. Spray Foam

The United States demand for insulation is estimated to rise 3.7 percent per year to approximately $9.5 billion by 2021.^[i] And with so much demand, new types of insulation are being tested for the future. We will focus on one—Hemp.

According to Green Building Advisor, “Two North American companies are producing insulation for residential construction from locally sourced hemp fiber. This gives builders an alternative to fiberglass, plastic foams, and other more conventional materials.”^[ii]

Europe Has More Access to Hemp

In Europe, builders have access to hemp insulation, but availability has been limited in the U.S.  Some U.S. builders have toyed with a mix of hemp fibers and lime called “hempcrete.” But, because of U.S. laws, extensive use of industrial hemp has been blocked.

One Canadian company capable of producing threadlike hemp insulation on a commercial scale is Montreal-based MEM Inc.  Not far behind producing hemp fiber insulation is a biomaterials supplier in Louisville, Kentucky, called Sunstrand. And, new on the scene is Nature Fibres, a Canadian company based in Quebec. ^[iii] The interesting fact about Nature Fibres is they moved into Asbestos, Quebec, to start up their business. The town was named after asbestos because of the former industry in town. But, due to the associated health risks, those manufacturing facilities are closing their doors.

Benefits of Using Hemp

The benefits of using Hemp for insulation are many. It is biodegradable and has a very long service life. “Walls opened up in France 50 years after construction showed hemp insulation looking essentially brand new.” Hemp is composed mostly of a natural fiber (88% hemp fiber and 12% polyester fiber) with no chemical binders and no VOC (volatile organic compounds) off-gassing. As a result, it allows water vapor to pass through it. and is naturally repellant to rodents and insects.

It is clear that with all the changes in the market and with regulations, the insulation industry needs to keep up with demand and changing times. The Green Cocoon is a company that looks to help people lower their carbon footprint by increasing their home's efficiency. We do this while using the greenest products available on the market.

[i] Walls & Ceilings (2019, August 6). An Optimistic Look into the Insulation Future. Retrieved from wconline.com.
[ii] Green Building Advisor (2018, March 8). Hemp Insulation Comes to North America. Retrieved from greenbuildingadvisor.com
[iii] Eco Home (2018, October 19). Hemp Insulation in Canada & USA – Insulating Naturally Is an Eco-Friendly Alternative. Retrieved from ecohome.net.

If insomnia is a problem, maybe your bedroom is too hot or too cold. Both can affect sleep in surprising ways.  Are you keeping your room too cool for comfort because your home costs a fortune to heat? Don't lose sleep to save money! Contact us to find out how you can make your home more energy and cost-efficient.

How Air Temperature Affects Your Sleep

Experts agree the temperature of your sleeping area and how comfortable you feel in it affect how well and how long you snooze. Why? “When you go to sleep, your set point for body temperature -- the temperature your brain is trying to achieve -- goes down." "Think of it as the internal thermostat.” If it’s too cold or too hot, the body struggles to achieve this set point. That mild drop in body temperature induces sleep. Generally, Heller says,“if you are in a cooler [rather than too-warm] room, it is easier for that to happen.” But if the room becomes uncomfortably hot or cold, you are more likely to wake up. He explains that the comfort level of your bedroom temperature also especially affects the quality of REM (rapid eye movement) sleep, the stage in which you dream.

What’s the Best Temperature for Sleeping?

Recommending a specific range is difficult because what is comfortable for one person isn’t for another. While a typical recommendation is to keep the room between 65 and 72 degrees Fahrenheit, Heller advises setting the temperature at a comfortable level, whatever that means to the sleeper. There are other strategies for creating ideal sleeping conditions, too. Experts from the American Academy of Sleep Medicine, for instance, advise thinking of a bedroom as a cave: It should be cool, quiet, and dark. (Bats follow this logic and are champion sleepers, getting in 16 hours a day.) Be wary of memory foam pillows, which feel good because they conform closely to your body shape -- but may make you too hot. And put socks on your feet, as cold feet, in particular, can be very disruptive to sleep.

This is a great article about why over half the new homes in the USA are insulated with fiberglass batts.

"The big problem with fiberglass is that nobody understands how to properly install it to minimize air leakage. And if they do understand how to install it, they don't want to spend the time and money doing it.

"So builders will happily keep building crappy walls that the wind can blow through because people can’t see it. They would rather sell visible performance, like windows and mechanical systems, because they can get real money for that."

Read entire article from Treehugger.com, and then call us!

Insulation isn't just for the winter months! Heating and cooling account for 50 to 70% of the energy used in the average American home. Inadequate insulation and air leakage are leading causes of energy waste in most homes. In the summer, insulation keeps the walls, ceilings and floors of your home cooler, which eases the load on your air conditioner and lowers your cooling costs.

Ask us about insulating your home today! Give us a call at (978) 462-0082