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Commercial Roofing Insulation

Welcome to Martin Commercial Roofing Company. We have been serving the roofing needs of North Carolina, South Carolina and Florida businesses for well over 30 years. We pride ourselves on developing a long term relationship with our customers, listening to their needs and then suggesting the proper course of action; be it preventative maintenance, repair or replacement.

We use only the highest quality products available in our industry. These are the most "tried and true" as well as the most innovative available today. Our crews are technically trained for each system we install to ensure quality and adherence to manufacturer standards.

When it comes to commercial and residential insulation products and installations you should only trust a company with the experience and knowledge to handle this important energy saving application.


R-Values and Roofing Insulation

A material’s R-value is the measure of its resistance to heat flow. It is important to know the R-value because many states or regions require that a roof system have a minimum amount of thermal resistance on commercial, industrial, and/or institutional buildings. The way it works is simple: the higher the R-value, the more the material insulates.

Some common roofing materials and their corresponding values for Thermal Conductance (C) and Thermal Resistance (R) are shown in the following table.

Material

Thickness In Inches

C-Value

R-Value

Metal

N/A

0.000

0.00

Concrete

1.0

3.333

0.30

Gypsum

1.0

1.667

0.60

Wood

1.0

1.099

0.91

Tectum

1.0

0.500

2.00

Inside Air Film

N/A

1.087

0.92

Outside Air Film - Summer

N/A

4.000

0.25

Outside Air Film - Winter

N/A

5.882

0.17

Vapor Retarders

N/A

0.000

0.00

BUR Gravel

N/A

2.941

0.34

BUR Smooth

N/A

4.167

0.24

Fiberboard

1.0

0.360

2.78

Perlite

1.0

0.360

2.78

Phenolic Foam*

1.0

0.120

8.30

Fiber Glass

1.0

0.256

3.90

Polyisocyanurate

1.0

0.180

5.56

Polyisocyanurate Composite

1.5

0.240

4.17

Polystyrene Bead Board

1.0

0.280

3.57

Polystyrene Composite Board

1.5

0.301

3.32

Polystyrene - Expanded (EPS)**

1.0

0.260

3.85

Polystyrene - Extruded (XEPS)***

1.0

0.200

5.00

Sprayed Polyurethane Foam****

1.0

0.150

6.88

Cork

1.0

0.280

3.57





Call us at 1-800-421-4170 for a FREE COMMERCIAL OR RESIDENTIAL ROOFING INSULATION ESTIMATE or email us. You can also use our convenient online request form to inquire about our metal roofing services or to request a contact.