When we assess the R-value of a material, we’re determining its ability to restrict thermal movement through it. In fact, the “R” in “R-value” stands for resistance to heat flow. Essentially, all you need to remember is the higher the R-value, the better the insulation.
To calculate the R-value, you simply add together the total thickness (in inches) of each insulating material within your roofing system: For each different material, multiply the thickness by the standard R-value per inch for that material. Add the results for all the materials together to get the total R-value for the roof assembly.
WHY WORRY ABOUT YOUR BUILDING’S R-VALUE?
The more roof insulation your commercial building has installed, the less you spend on monthly heating and A/C bills. When your building requires less energy to keep customers and employees comfortable, you save money. If you’re constantly cranking up your thermostat to maintain a comfortable environment, it’s costing you money.
Depending on where you live, you’ll also need to take into account local building codes. If changes to your building insulation amounts or type would be beneficial, you’ll want to ensure that work performed is in compliance with the local building codes.
HOW TO IMPROVE YOUR BUILDING’S R-VALUE
There are many effective ways to help improve your commercial building’s roof insulation. For instance, a spray foam roofing system is both low maintenance and energy efficient. It typically has an R-value of up to 6.6 per square inch of thickness, and it can often be applied over existing roofing systems, which works well if you’re not looking to re-roof.
Choosing the best option for your building that’s both effective and affordable will require the expertise of an experienced roofing contractor.
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