Selecting the Proper Metal Building Insulation for Your Needs

In order to select the Metal Building Insulation that will best meet your needs, you should consider the following items:
Facings
Facing is the material (white vinyl or polypropylene) used as the finished vapor-barrier cover laminated to and over the fiber glass blankets. Make sure that you click on the comparison chart on the facing details page to better understand the differences in strength, cost, durability, and fabrics available from our company.
View more details about the metal building insulation facings we offer
Tabs
Tabs are the extra facing material at the side laps of your insulation used to seal or create the finished edge for the seams. 1-6” is the most common, but installers may each have their own preference.
View more details about the metal building insulation tabs we offer
Thickness (R-Values)
Thickness/R- Value is a measurement of the effectiveness of an insulated product to retard the loss of heat flow. The thicker the insulation blanket, the higher the R- Value.
| Fiber glass thickness |
Uninstalled R- Value |
| 2” |
Minimal (primarily used as a vapor barrier) |
| 3” |
R-10 |
| 4” |
R-13 |
| 6” |
R-19 |
Uninstalled R-Values with the Banding System - (See More on Banding Systems below)
6” between purlins and 3” between purlin and roof panel R-29
6” between purlins and 4” between purlin and roof panel R-32
6” between purlins and 6” between purlin and roof panel R-38 |

Banding Systems
Banding system (2 layers of insulation) offers the highest R-Values available on our site. You can chose to invest in the upgraded insulation package today (a one time cost), or you can pay the utility company additional money for a lifetime. With the rising costs of energy and the relative low cost of quality insulation, a banding system should be considered for structures that are required to be climate controlled.


Retrofit Systems
FOR EXISTING BUILDINGS: Metalbuildinginsulation offers one of the most easy to install retrofit packages available for an existing metal building. Factory pre-cut white vinyl faced fiber glass blankets are placed in between the metal roof purlins and held in place by steel strapping called banding screwed to the bottom of the purlin. Your roof purlin spacing can vary but 5’ on center and 8 inches in depth is common (which is the available insulating area). Our 6 inch thick fiberglass retrofit system will brighten any interior as well as provide additional insulating values of R-19. This system is design to achieve the most insulating value out of the available voids created by existing structural components in your building.

Johns Manville – The Leader in Fiber glass Insulation
You can view printable information and specifications from John’s Manville on the fiber glass used in the insulations we sell by clicking on the PDF links below.
You will need Adobe Acrobat Reader to view these documents.
Microlite "L" – Wide-Blanket Roll
PEBS Blanket TM
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