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Insulating Your Roof To Retain More Heat

insulating your roof

Anyone who has ever lived in a home, apartment, or cottage knows that the walls and roof are crucial to the building’s thermal efficiency. Almost all heat is lost through a building’s roof, which inevitably leads to rising heating costs.

Roof insulation is similar to a blanket in that it serves as a shelter from the outside elements. Insulation serves a dual purpose: trapping warm air during the colder months and then blocking out the sun’s rays during the hotter seasons.

As important as a heating and cooling system is, it is just as essential to have an insulation system that works properly to keep the building at a pleasant temperature.

Here is everything you need to know about insulating your roof to retain more heat.

How Does The Heat Leave A House?

If you’re wondering how heat loss happens from inside a house, here are a few pointers to explain that:

    • A home’s foundation is made of cold soil or rock. It conducts heat away from the house and into the ground below.
    • The walls and roof of a house act as conductors, allowing heat to move through the structure. Since the exterior surfaces of the walls and roof tiles are warmer than the air around them, cold air close to them warms up and moves away by convection.
    • A house may appear to be a large, complex area with a lot going on inside, but from the perspective of physics, it behaves much like a campfire in the center of a vast, chilly landscape. It continuously emits heat into the environment.

How Does Insulation Work?

Insulation is used to prevent heat transfer in a structure. Roof insulation is a material that serves as a barrier on the roof between the interior of your home and the considerably different temperatures outside to decrease heat gain or loss.

While insulation may reduce heat loss, it does not actually heat a space. In cold regions, insulation prevents warm air from escaping, and in hot ones, it prevents hot air from entering and keeps the inside of the house at a more comfortable temperature. The result is an optimal temperature inside in both climates.

Recent changes in insulation regulations worldwide have raised expectations on building structures’ thermal resistance to cut down on energy loss for heating or cooling, increasing the relevance of thermal insulation.

Roof Insulation And Heat Loss Prevention

Insulating your roof is the most effective measure to lower heat bills. Warm air rises, and if your roofs are uninsulated, you may end up wasting up to a quarter of your home or building’s heating supply.

When the temperature outside is too warm or too cold, homeowners may rely on the benefits of roof insulation to help them maintain a comfortable environment indoors. According to the EPA, a well-insulated home can save annual utility costs by around 15%. Therefore, spending money on it is a good idea.

Insulating a house will naturally result in reduced energy consumption, which is excellent news for the planet.

Other Benefits Of Proper Roof Insulation

There are several benefits to insulating your home as a homeowner. The most critical ones are listed below:

Long-Term Prevention

If a roof isn’t well insulated, rising temperatures may cause snow to melt on its surface, which might then cause ice jams. Ice dams, condensation, and moisture buildup on your roof can harm your property.

Noise Reduction

Besides sound insulation, thermal roof insulation reduces outside noise transfer into a building’s interior and inside-to-outside noise transfer. Since it slows down air circulation, which produces wind noises, roof insulation helps muffle outside noise.

Stop Leaks

Even a minor leak can cause harm. You can prevent this damage with the help of roof Insulation, as it will slow a significant roof leak from entering your home.

What Characteristics Constitute Reliable Insulation?

Insulation needs to have these qualities so that it can do its job correctly:

    • Choose the suitable insulation material for the proper application.
    • The insulation must remain in place.
    • There are no low points, compressions, or gaps in the installation.
    • Must maintain a dry environment

5 Types of Insulation Most Effective for Roofs

Here are several insulation types that work best for roofs.

1. Rigid Insulation Boards

Rigid board insulation, typically comprised of polyisocyanurate (polyiso), extruded polystyrene (XPS), or expanded polystyrene, is used mainly for wall insulation rather than attic insulation (EPS). A rigid insulation board’s R-Value and price will vary depending on the material used to make it.

2. Blown-In Or Loose-Fill Insulation

Loose-fill or blown-in insulation, made from fiberglass, cellulose, or recycled materials, is an excellent option for filling a big area like an attic or crawl space. The insulation can be blasted onto the site using a flexible tube, allowing for the insulation of previously inaccessible areas. Controlling the overall insulation helps you get the optimal level for your climate.

While fiberglass insulation cannot catch fire, it is not as effective in colder areas. Though flammable, cellulose insulation is more resilient and a better choice in colder locations.

3. Batt Blanket

Batt blanket insulation is easy to install and is made of fiberglass, which is known for its insulating properties. Rolls of batt insulation can be found in wide widths and with good R-Values. In contrast to spray foam insulation, you can trim this insulation to fit around ceiling rafters and joists.

4. Structural Insulated Panels

As their name implies, structural insulated panels (SIPs) resemble plywood with a layer of rigid insulation in between. This makes them challenging to retrofit into existing homes, but they are becoming a popular and long-lasting choice for new construction.

5. Spray Foam Insulation

Spray foam insulation involves evenly applying a polyurethane or latex spray to the bottom of the roof deck, tiles, and slates. It insulates and prevents drafts and water damage by sealing cracks. Use it as blanket insulation or in specific problem areas with high moisture levels.

How Do You Rate The Effectiveness Of Various Insulating Products?

How can you determine which types of insulation are the best? The R-value and the U-value are essential measures to keep an eye out for.


A material’s thermal resistance, measured in terms of its R-value, indicates how well it blocks the passage of heat. If the r-value is high, the material is a good heat insulator.


U-values, which quantify the total heat lost through a given thickness of insulating material, is another typical measurement. Although U-values and R-values are closely connected, the former provides more reliable results. The lesser the U-value, the less heat is transferred through the material, and the better it performs as an insulator.

U-values account for losses from all three pathways (conduction, radiation, and convection), while R-values solely consider conduction. Adding the losses from radiation and convection to the conduction loss (one divided by R) yields the overall U-value.

In most cases, we’re just looking to compare various materials. Therefore it’s sufficient to know that higher R-values and lower U-values are preferable.


Install insulation carefully, and you’ll have a toasty and comfortable house over the colder months. The R-value of a home’s insulation indicates how well it prevents heat from escaping. The next question is what kind of insulation is optimal and what materials to use. Last but not least, decide whether you will handle this on your own or seek outside assistance.

Get The Best Home Insulation Materials For Your Next Project

After reading this, you should know what homeowners want from a house insulation job and be better prepared to install the insulation materials they need this winter. Florence & Amagansett Building Materials offers an extensive selection of materials and brands for insulation design and installation.

Check out our website or call us at +631 499 6200 to learn more about the roofing and insulation materials we offer.

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