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Category: Home Maintenance

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Ice Dams and How to Prevent Them

Building Science, Home Maintenance, Insulation, R-Value, Roof Health

Does your house have icicles hanging from the roof during the winter? If so, there is something going on that could potentially cost you thousands of dollars. It is called an ice dam and here’s how to prevent them.

What is an ice dam?

ice dams and how to prevent them using closed cell spray foam

If the attic isn’t properly insulated, during the winter the warm air will escape and melt the first layer of snow on your roof. Many uneducated contractors will tell you to increase your attic insulation to prevent ice dams. While this may slow down the buildup of ice dams, it will essentially increase the speed of your heat loss. Consequently, the heat loss will make your home less efficient.

DIYers (do-it-yourself) like to solve the problem by putting heat tape on the roof, but that can be incredibly damaging to the shingles. Furthermore, the tape does not solve the problem, which is inefficient insulation and heat loss.

The layer of snow that is against the roof will melt and run down the roof shingles. You can’t see this happening because it is under the pile of snow. Once the water reaches the overhang where it is colder, an ice dam starts to form. This process happens over and over; the ice dam gets bigger; and the water gets higher. Eventually, water will get under the shingles!

As the melting continues, the ice dam and water lift the shingle more and more. Eventually, it hits the top of the shingle. That is when water can get into your house, and potentially cause thousands of dollars in damage.

How to prevent ice dams

Whether you are creating a conditioned or unconditioned attic, we recommend the same things.

  1. Seal the gaps – First you need to air seal any gaps or holes in the floor or roof. There are several products that we suggest you use. Please contact us so we can help you decide which product is best for you.
  2. Use correct R-value – Make sure you have enough R-value. Remember, fiberglass doesn’t have a constant R-value so we don’t recommend it. In southern New Hampshire, you need a minimum of an R-49.
  3. Ventilate the attic – If you plan to insulate the attic floor, make sure to allow for proper ventilation to prevent condensation. If you are not sure you have adequate insulation, give us a call and we will come out and take a look.

Green Cocoon, spray foam insulation NH
Using a spray foam in the attic is the best choice because it fills the holes and crevices. We recommend closed cell spray foam for several reasons:

  1. It has a higher R-value per inch than open cell spray foam.
  2. Closed cell spray foam is a vapor barrier and water can’t permeate it.
  3. It sticks to the walls and fills all the crevices and holes.


Learn more about Closed Cell Spray Foam by watching a video on our website. Contact us with questions.

Does Spray Foam Insulation-Damage-Shingles-Greencocoon

Does Spray Foam Damage Roof Shingles?

Building Science, Energy Efficiency, Home Maintenance, Insulation

Has anyone ever told you that spray foam insulation will damage your roof shingles and void your warranty? Guess what? They are wrong!

Founded in 2007, The Green Cocoon has more than 14 years of experience; insulating attics. As a result, we have heard many stories about shingles. But, the biggest fear is that your roof shingles will be damaged by spray foam insulation. Consequently, we are helping alleviate homeowners’ fears by showing them the benefits of having spray foam insulation.

Is Spray Foam Bad for Shingles?

One of the biggest fears people have is that spray foam will make shingles curl because they overheat. This misconception came about when people believed insulation was a heat source and were concerned about having a “hot roof.” In actuality spray foam is a barrier between two areas of different temperatures, for example, your attic space compared to your snowy roof.

Photo of airflow on a roof - The Green Cocoon InsulationPhoto courtesy of RetroFoam of Michigan

If you don’t know the term “hot roof,” I’m sure you’ve heard of an unvented attic. If your roof deck has been insulated, that means your attic space is now part of your home’s conditioned space. This method of insulating the attic can actually be good for your roof because it can help prevent ice dams.

The Florida Solar Energy Center did a study a few years ago during the peak summer months in Florida—a state that gets much hotter than New England—measuring the temperatures of roof shingles above an attic with a radiant barrier. Depending on the color of the shingles, the study found the shingles peak temperatures were between 2- and 5-degrees Fahrenheit higher than the temperature of shingles in the same conditions without a radiant barrier.

What this study means is that you can insulate the roof deck of your home with foam insulation without any adverse effects to your shingles. Foam insulation creates thermal resistance, which is keeping the hot air out during the summer and the cool air inside.

Insulating Your Attic with Spray Foam

Now that we’ve shown you the research that your shingles won’t curl or get ruined with spray foam insulation, you might be curious about the benefits of foam insulation in your attic.

If you have general questions, check out the FAQ section of our website. For more in-depth questions, contact us and we would be happy to answer any them.

Green Cocoon Says Check Attic Insulation

10 Home Maintenance Tips for Spring

Home Maintenance

Now is the perfect time to get your home ready for spring using these 10 home maintenance tips. After a long, dreary winter, seeing the snow melt and feeling the warmer temps is a breath of fresh air. Getting your home ready for spring is more than cleaning.

Examine Roof Shingles

Examine roof shingles to see if any were lost or damaged during the winter. If your home has an older roof covering, you may want to start a budget for replacement. The summer sun can really damage roof shingles. Shingles that are cracked, buckled, or loose or are missing granules need to be replaced. Flashing around plumbing vents, skylights, and chimneys need to be checked and repaired by a qualified roofer.

Seal Air Leaks

Pay particular attention to windows and doors. If you spot cracks or gaps, caulking or weatherstripping should fix the problem; both are simple, DIY projects. Weatherstripping windows, for example, requires only measuring tape, a utility knife, and self-adhesive tape.

Insulate the Attic

Green Cocoon, spray foam insulation NHIf your attic has no (or little) insulation, the room could become a sweatbox on a warm spring day. Adding insulation before warmer weather arrives will prevent that from happening. Another benefit of insulating your attic now: It will help reduce heat loss during the cold winter days ahead.

Check the Gutters

Check for loose or leaky gutters. Improper drainage can lead to water in the basement or crawl space. Make sure downspouts drain away from the foundation and are clear and free of debris.

Check Outside Faucets

Check outside hose faucets for freeze damage. Turn the water on and place your thumb or finger over the opening. If you can stop the flow of water, it is likely the pipe inside the home is damaged and will need to be replaced. While you’re at it, check the garden hose for dry rot.

Service the AC Unit

Have a qualified heating and cooling contractor clean and service the outside unit of the air conditioning system. Clean coils operate more efficiently, and an annual service call will keep the system working at peak performance levels. Change interior filters on a regular basis.

Check the Foundation

Check foundation walls, floors, concrete, and masonry for cracking, heaving, or deterioration. If a significant number of bricks are losing their mortar, call a foundation professional. If you can slide a nickel into a crack in your concrete floor, slab, or foundation, call a foundation repair professional near you immediately.

Siding

Clean siding with a pressure washer to keep mold from growing. Check all wood surfaces for weathering and paint failure. If wood is showing through, sand the immediate area and apply a primer coat before painting. If paint is peeling, scrape loose paint and sand smooth before painting.

Replace Filters

Replace all filters including water, range hood, and air vent filters. You should replace these filters every 3-6 months depending on the type of filter you have.

Clean Out the Dryer Vent

Sure, you diligently clean out the lint trap every time you empty the dryer, but when was the last time you cleaned out the entire dryer vent? This easy task will not only improve the efficiency of your dryer, but it can also help prevent fires. (According to the U.S. Fire Administration, clothes dryers cause around 2,900 home fires each year.) 

In short, these 10 home maintenance tips for spring are just a few we recommend. There are many more available at energy.gov.

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