Category Archives: Spray Foam

The Down Low on Hot Roofs

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Filed under Building a House, ceilings, Construction, Home Maintenance, Hot Roof, Insulation, Lindus Construction, Roofing, Roofing Installation, Spray Foam
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Traditionally in the Midwest, homes are insulated with fiberglass or cellulose insulation.  However, a newer trend being seen in homes is the use of spray foam insulation.  Just as the name implies, this type of insulation comes in spray cans. It’s a combination of resin and chemicals such as polyurethane & isocyanides.   As the insulation is sprayed, it expands and fills up the entire area it is being applied to.  The term “hot roof” comes in because the spray foam insulation is being affixed directly to the roof sheathing which removes the need for ventilation.

How Do Hot Roofs Differ From Traditional Roofs

Attics typically have an insulated floor and have ventilation.  Air from outside is permitted to come in through the soffits and exit through the top of the roof which creates a cold attic during the winter months.  This method is intended to deter ice dams by keeping the roof cooler. When your attic is filled with spray foam insulation to create a hot roof, your attic’s temperature rises because the thermal envelope is shifted to the underside of your roof because ventilation is not present.

Hot Roofs & Roofing Warranties

Industry studies show that shingle temperature is only raised by a few degrees with a hot roof.  However, these few degrees can lower shingle lifespan by up to 10% and cause shingles to fade.  GAF, North America’s largest manufacturer of residential and commercial roofing, offers a “Golden Pledge” warranty which covers roofing material and labor for 50 years.  This warranty is not pro-rated.  However, those with a hot roof are not eligible for GAF’s highest level of warranty because a hot roof does not have the insulation standards that their asphalt shingles were designed for.  Before moving forward with a hot roof, check with your roofing manufacturer to make sure that doing so will not void your roofing warranty.  Be sure to check with your city to see if they have restrictions on hot roofing before proceeding with your project.

Perks of a Hot Roof

The unit of measurement for insulation is called the “R-Value”. The R-value measures how well insulation is able to resist heat going through it. The bigger the R-value, the better it will insulate your home.  A hot roof contains the highest R-Value because there are no chances for air to leak.  If the attic contains ductwork, it won’t need to be insulated because there is no energy loss.  A hot roof prevents energy loss and can lower your utility bills.

Am I Allowed to Have a Hot Roof? 

In the state of MN, the following cities PROHIBIT Hot Roofs:

  • Apple Valley
  • Delano
  • Eagan
  • Eden Prairie
  • Hopkins
  • Lakeville
  • Maple Grove
  • Plymouth
  • Shakopee
  • Saint Louis Park
  • Woodbury

In the state of MN, the following cities MAY Allow Hot Roofs if Certain Criteria is Met:

  • Bloomington
  • Brooklyn Park
  • Chanhassen
  • Coon Rapids
  • Elk River
  • Minneapolis
  • Richfield
  • Roseville
  • Saint Paul

Tune into AM 830 WCCO on Saturdays from 9:00-10:00am hosted by Denny Long and Andy Lindus to ask questions regarding your home improvement projects. Call us now at 1-800-873-1451 or check us out on the web at www.lindusconstruction.com to schedule a free in-home estimate for your home improvement needs today!

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INSULATION SHOWDOWN-WHICH TYPE MAKES SENSE IN YOUR HOME?

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Filed under Cellulose, Fibergalss Insulation, Insulation, Spray Foam
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Recognizing the fact that your home doesn’t stay keep your family warm the way it should is the easy part.  Determining what type of insulation makes sense for your home is a little trickier.  In this blog, we’ll break down the different types of insulation available to you and the must-know facts about them.  But first, some helpful knowledge that applies to all types of insulation.

Why Should I Care About My Home’s Insulation?  A properly insulated home:

  • Is more comfortable
  • Lowers energy bills
  • Provides a healthier home environment
  • Minimizes outside sounds

How Do You Measure the Strength of Insulation?

The unit of measurement for insulation is called the “R-Value”.  The R-value measures how well insulation is able to resist heat going through it.  The bigger the R-value, the better it will insulate your home.  Below, is a map of the United States with  reccomended R-values for various zones, separated by climate.

The 3 Main Types of Insulation:

Spray Foam:

The Material: Just as the name implies, this type of insulation comes in spray cans. It’s a combination of resin and chemicals such as polyurethane & isocyanides.  As the insulation is sprayed, it expands and fills up the entire area it is being applied to.

Perks:This type of insulation dries quickly and can be trimmed to expand past the boundaries you have set for the project. It fills entire areas that might be missed with other insulation alternatives.  Spray foam insulation also increases your home’s resale value.  Because spray foam does not absorb moisture, mold cannot grow on it.

Consider This: While spray foam is the most popular type of insulation being used today, there are a few factors you should consider.  The investment for this type of insulation is the most significant and it may take 2-4 years before your energy savings have paid for the project.  It is highly recommended that you hire a trained professional.  Because of the nature of the material being used, the installation process is messier and lengthier.

Cellulose:

The Material: Cellulose is mainly comprised of recycled newsprint.  It is treated to combat against fire, insects and mold.

Perks: Cellulose tends to be cheaper than fiberglass insulation and like, spray foam; it can be applied with a sprayer which allows it to get in areas that fiberglass insulation cannot. Cellulose insulation is also quite fire-resistant.  It is made of sustainable materials; it’s often considered a “green” form of insulation.

Consider this: Cellulose can settle over time which can decrease its R-value even further away from that of spray foam.  It’s also highly recommended that this type of insulation be installed by a professional.  The installation process can also produce dust particles which can cause irritation during the installation process.

Fiberglass:

The Material: Fiberglass insulation is a man-made fiber comprised from a variety of materials including sand and reused glass.

Perks: Fiberglass insulation is designed to fit in standard spots between wall studs.  It is made of recycled materials and therefore, environmentally friendly.  It is also typically the least chemically treated form of insulation.

Consider this: Because fiberglass contains small glass particles, direct contact with the skin can cause itching and rashes.  Inhalation of these fibers can lead to difficulty breathing.  Fiberglass insulation can be tricky to fit in non-standard spaces.  The build-up of moisture between fiberglass and the building’s exterior cannot evaporate which can cause mold & mildew.  Pinching or smashing of fiberglass insulation during the installation process can decrease its R-value.

 

Lindus Construction offers free no obligation estimates on spray foam, blow-in cellulose & fiberglass insulation. Tune into AM 830 WCCO on Saturdays from 9:00-10:00am hosted by Denny Long and Andy Lindus to ask questions regarding your home improvement projects. Call us now at 1-800-873-1451 or check us out on the web at www.lindusconstruction.com to schedule a free in-home estimate.