Photo: Blue Bird

Is bubble wrap insulation any good?

neo.ne.gov - Nebraska Energy Quarterly, Stay Away from Foil-Faced Bubble Wrap

What is the strongest roof design?

Pros: Hip roofs are one of the strongest designs for a roof. The inward slope on all four sides of a hip roof makes it an excellent design for both...

Last updated Jul 1, 2022

How long does it take to build a Derksen shed?

A building purchased from a dealer (in stock on the dealer's lot) will take 7-10 days to deliver. If the building purchased has to be manufactured...

Last updated Jan 16, 2019

Promotion

Never Use This for Insulation...

Stay Away from Foil-Faced Bubble Wrap

Most brands of foil-faced bubble wrap are only 3/8 inch thick or less, and have an R-value of only 1.0 or 1.1. Since the product often costs more per square foot than 1-inch thick rigid foam rated at R-5, why would anyone use bubble wrap as insulation?

The R-value of foil-faced bubble wrap is so low that it has few, if any, advantages over rigid foam. Of course, the product's foil facing can be used as a radiant barrier — but if you want a radiant barrier, cheaper products are available. (The bubble wrap layer is unnecessary, since it adds cost to the material without adding any useful thermal performance.) Most brands of foil-faced bubble wrap are only 3/8 inch thick or less, and have an R-value of only 1.0 or 1.1. Since the product often costs more per square foot than 1-inch thick rigid foam rated at R-5, why would anyone use bubble wrap as insulation?The R-value of foil-faced bubble wrap is so low that it has few, if any, advantages over rigid foam. Of course, the product's foil facing can be used as a radiant barrier — but if you want a radiant barrier, cheaper products are available. (The bubble wrap layer is unnecessary, since it adds cost to the material without adding any useful thermal performance.)

Exaggerated R-value claims

Since the main benefit from foil-faced bubble wrap is due to its radiant-barrier facing, the product is basically worthless unless it faces an air space. A decade ago, when I was the editor of Energy Design Update, I noticed that many manufacturers of foil-faced bubble wrap were promoting their products for use under concrete slabs on grade. In this application, the shiny foil is clearly not facing an air space, so the exaggerated R-value claims made by bubble-wrap manufacturers were particularly outrageous. My article exposing the bubble-wrap scammers appeared in the September 2003 issue of EDU. In that article, I reported that one manufacturer, WE International, made absurd claims about a thin (5/16-inch) product called Concrete Barrier rFoil. The manufacturer's website boasted, "Concrete Barrier can serve three purposes underneath concrete: R-10 insulation, a vapor barrier and a radon barrier. ...How does it compare to 2-inch foam board? It works just as well." Similarly, Insulation Solutions, the manufacturer of a 3/8-inch thick product called Insul-Tarp, claimed that the flexible tarp has an "R-value equivalent" rating of R-5 to R-10. After these lies were publicized, three manufacturers wrote letters to EDU apologizing for the "oversights" and "typographical errors" that appeared on their websites.

Blurring the line between product R-values and assembly R-values

Many of the manufacturers and distributors that publish exaggerated R-values deliberately blur the bright legal line that separates product R-values from assembly R-values. According to federal law, the R-value of an insulation product — for example, a piece of 1-inch thick polyisocyanurate — is the R-value of the insulation alone. That's the R-value which insulation manufacturers are required to report on their packaging and in their advertising; the requirement is spelled out in the Federal R-Value Rule, a law that applies to manufacturers, retailers, and builders. The R-value of a building assembly is something different. For example, if you build a wall with a layer of interior polyisocyanurate, followed by horizontal 1x4 strapping and drywall, the air space between the polyiso and the drywall has a measurable R-value. If you want to calculate the R-value of the entire wall assembly, you would need to calculate the R-value of the air space and add that R-value to the R-value of all the other layers. Once you've done that, you'll know your wall assembly R-value. Here's the key point: polyiso manufacturers can't claim the R-value of an air space in their labeling or advertising (unless the advertising makes a very clear distinction between the product R-value and the R-value of a hypothetical building assembly).

What is a house with a guest house called?

Casitas, or guest houses, are accessory dwelling units (ADU) the are separate from the main house. These can be useful in retirement because you...

Last updated Jun 27, 2020

How do you figure out what size shed you need?

Lay out the building to scale including the door. Measure the items then cut out pieces to represent each one and try to arrange them inside the...

Last updated Feb 28, 2018

Are shed plans easy to follow?

These are! They guide you every step of the way to complete your dream shed.

Learn More »

Promotion

Many of the manufacturers and distributors that publish exaggerated R-values deliberately blur the bright legal line that separates product R-values from assembly R-values.According to federal law, the R-value of an insulation product — for example, a piece of 1-inch thick polyisocyanurate — is the R-value of the insulation alone. That's the R-value which insulation manufacturers are required to report on their packaging and in their advertising; the requirement is spelled out in the Federal R-Value Rule, a law that applies to manufacturers, retailers, and builders.The R-value of a building assembly is something different. For example, if you build a wall with a layer of interior polyisocyanurate, followed by horizontal 1x4 strapping and drywall, the air space between the polyiso and the drywall has a measurable R-value. If you want to calculate the R-value of the entire wall assembly, you would need to calculate the R-value of the air space and add that R-value to the R-value of all the other layers. Once you've done that, you'll know your wall assembly R-value.Here's the key point: polyiso manufacturers can't claim the R-value of an air space in their labeling or advertising (unless the advertising makes a very clear distinction between the product R-value and the R-value of a hypothetical building assembly).

Product distributors are violating federal law

Fortunately, most (but not all) manufacturers of foil-faced bubble wrap have removed the blatant lies from their websites. Instead, manufacturers tempt the unwary with vague promises; for example, they claim that their bubble wrap "has a high R-value" or that it "resists the transfer of heat." The scoff-law websites with the greatest number of lies about foil-faced bubble wrap are those maintained by distributors — including a few large corporations like Home Depot, Ace Hardware, and Amazon — rather than those maintained by manufacturers. For example, Amazon claims that a type of foil-faced bubble wrap product manufactured by EcoFoil ("HVAC Duct Wrap Insulation") has an R-value of R-8. But a careful reading of the manufacturer's technical data sheet and the referenced ICC-ES Evaluation Report reveals that the R-8 value claim is based on an assembly that includes the R-value of a 2-inch air space. Similarly, Ace Hardware is advertising Reflectix, an R-1 foil-faced bubble wrap product, with a blurb that claims that the product has "R-values ranging from R-3.7 to R-21." That's a little like Starbucks saying that a cup of coffee is a satisfying meal — as long as you remember to accompany the coffee with a 12-inch submarine sandwich (not included).

Yes, a few manufacturers are still lying

Although the major manufacturers of foil-faced bubble wrap have (almost) cleaned up their act, some still include exaggerations on their websites. One manufacturer that trumpets exaggerated R-values is EcoFoil (a.k.a. rFoil, a.k.a. Covertech Fabricating). The EcoFoil website describes the company's duct wrap as an R-8 product, even though the R-8 claim is based on an assembly that includes an adjacent air space. The company also claims that "EcoFoil [foil-faced bubble wrap] under concrete insulation is superior to traditional, outdated forms of concrete floor insulation such as polystyrene or foam sheets." This statement is false. Elsewhere, EcoFoil claims that its 5/16-inch-thick bubble wrap product, which is called "Under Concrete Insulation," has an R-value of R-3.8. It does not. Another bad apple is Insulation4less, which retails a thin product called Prodex Total. On its website, the company states, "Prodex Total has a nominal thickness of 5 mm (13/64 inch) closed cell polyethylene foam covered on both sides with .0012 (00.03 mm) aluminum foil facing. ...R-value R-16 unaffected by humidity." Prodex may be unaffected by humidity — but it is seriously affected by gross exaggeration.

Are metal sheds a good idea?

Provides Better Security In terms of security, steel sheds are able to provide increased protection against thieves. Unlike some wooden or quality...

Last updated Oct 12, 2021

Can I turn my shed into an Airbnb?

With that in mind, building a “shedcation” can be a great option if you want to become an Airbnb host. It is a great way to make extra money,...

Last updated Oct 13, 2021

Can I build my own shed?

Yes, with the right plans you can build your dream shed.

Learn More »

Promotion

These are not examples of victimless crimes; there are victims. One victim is a blogger who reports using this sub-slab assembly: "In basement, install Insul-Tarp over crushed rock, single layer of wire mesh, and Wirsbro [hydronic] tubing, pour concrete (pump hose will go through stairwell hole)." Unfortunately, Insul-Tarp has an R-value of R-2 or less. For years, however, the manufacturer of Insul-Tarp claimed that the product was rated at R-7 or more. The blogger who specified Insul-Tarp believed the false claims, which is why he wrote, "This is what the Insul-Tarp looks like. The exterior is some kind of tough fabric, then there are two layers of thin white foam, then a layer of bubble wrap. Hard to believe this can be equivalent of 2 inches of styrofoam." Indeed, it is hard to believe — so hard, in fact, that the Federal Trade Commission initiated court action that forced Meyer Enterprises, the manufacturer of Insul-Tarp, to stop making false claims. According to the FTC complaint, Meyer Enterprises "claimed Insul-Tarp's R-value is 7.54, but in reality Insul-Tarp's R-value could not be more than 2." Although the major manufacturers of foil-faced bubble wrap have (almost) cleaned up their act, some still include exaggerations on their websites.One manufacturer that trumpets exaggerated R-values is EcoFoil (a.k.a. rFoil, a.k.a. Covertech Fabricating). The EcoFoil website describes the company's duct wrap as an R-8 product, even though the R-8 claim is based on an assembly that includes an adjacent air space. The company also claims that "EcoFoil [foil-faced bubble wrap] under concrete insulation is superior to traditional, outdated forms of concrete floor insulation such as polystyrene or foam sheets." This statement is false.Elsewhere, EcoFoil claims that its 5/16-inch-thick bubble wrap product, which is called "Under Concrete Insulation," has an R-value of R-3.8. It does not.Another bad apple is Insulation4less, which retails a thin product called Prodex Total. On its website, the company states, "Prodex Total has a nominal thickness of 5 mm (13/64 inch) closed cell polyethylene foam covered on both sides with .0012 (00.03 mm) aluminum foil facing. ...R-value R-16 unaffected by humidity."Prodex may be unaffected by humidity — but it is seriously affected by gross exaggeration.These are not examples of victimless crimes; there are victims. One victim is a blogger who reports using this sub-slab assembly: "In basement, install Insul-Tarp over crushed rock, single layer of wire mesh, and Wirsbro [hydronic] tubing, pour concrete (pump hose will go through stairwell hole)."Unfortunately, Insul-Tarp has an R-value of R-2 or less. For years, however, the manufacturer of Insul-Tarp claimed that the product was rated at R-7 or more. The blogger who specified Insul-Tarp believed the false claims, which is why he wrote, "This is what the Insul-Tarp looks like. The exterior is some kind of tough fabric, then there are two layers of thin white foam, then a layer of bubble wrap. Hard to believe this can be equivalent of 2 inches of styrofoam."Indeed, it is hard to believe — so hard, in fact, that the Federal Trade Commission initiated court action that forced Meyer Enterprises, the manufacturer of Insul-Tarp, to stop making false claims. According to the FTC complaint, Meyer Enterprises "claimed Insul-Tarp's R-value is 7.54, but in reality Insul-Tarp's R-value could not be more than 2."

Duct insulation scams

neo.ne.gov - Nebraska Energy Quarterly, Stay Away from Foil-Faced Bubble Wrap

Should a horse barn be heated?

Generally, unheated barns are healthier for your horses. Too much humidity will lead to unhealthy condensation, which can cause respiratory issues,...

Last updated Jan 26, 2020

How do I run power to my outdoor shed?

Start with a Switch The NEC requires a means, such as a single-pole switch, to disconnect the power where it enters the shed. ... Connect the wires...

Last updated May 14, 2019