Your nearest location is Little Rock, AR. Visit this location or find the location closest to your project.

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Your store: Little Rock, AR.

Your nearest location is Hartford, CT. Visit this location or find the location closest to your project.

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Your store: Hartford, CT.

Your nearest location is Jacksonville, FL. Visit this location or find the location closest to your project.

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Your store: Jacksonville, FL.

Your nearest location is Miami, FL. Visit this location or find the location closest to your project.

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Your store: Miami, FL.

Your nearest location is Orlando, FL. Visit this location or find the location closest to your project.

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Your store: Orlando, FL.

Your nearest location is Tampa, FL. Visit this location or find the location closest to your project.

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Your store: Tampa, FL.

Your nearest location is Atlanta, GA. Visit this location or find the location closest to your project.

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Your store: Atlanta, GA.

Your nearest location is Chicago, IL. Visit this location or find the location closest to your project.

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Your store: Chicago, IL.

Your nearest location is Indianapolis, IN. Visit this location or find the location closest to your project.

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Your store: Indianapolis, IN.

Your nearest location is Louisville, KY. Visit this location or find the location closest to your project.

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Your store: Louisville, KY.

Your nearest location is Baton Rouge, LA. Visit this location or find the location closest to your project.

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Your store Baton Rouge, LA.

Your nearest location is Boston, MA. Visit this location or find the location closest to your project.

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Your store: Boston, MA.

Your nearest location is Detroit, MI. Visit this location or find the location closest to your project.

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Your store: Detroit, MI.

Your nearest location is Minneapolis, MN. Visit this location or find the location closest to your project.

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Your store: Minneapolis, MN.

Your nearest location is Omaha, NE. Visit this location or find the location closest to your project.

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Your store: Omaha, NE.

Your nearest location is Newark, NJ. Visit this location or find the location closest to your project.

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Your store: Newark, NJ.

Your nearest location is Charlotte, NC. Visit this location or find the location closest to your project.

Your store: Charlotte, NC. See all locations.

Your store: Charlotte, NC.

Your nearest location is Rocky Mount, NC. Visit this location or find the location closest to your project.

Your store: Rocky Mount, NC. See all locations.

Your store: Rocky Mount, NC.

Your nearest location is Tulsa, OK. Visit this location or find the location closest to your project.

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Your store: Tulsa, OK.

Your nearest location is Cleveland, OH. Visit this location or find the location closest to your project.

Your store: Cleveland, OH. See all locations.

Your store: Cleveland, OH.

Your nearest location is Columbus, OH. Visit this location or find the location closest to your project.

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Your store: Columbus, OH.

Your nearest location is Allentown, PA. Visit this location or find the location closest to your project.

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Your store: Allentown, PA.

Your nearest location is Pittsburgh, PA. Visit this location or find the location closest to your project.

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Your store: Pittsburgh, PA.

Your nearest location is Philadelphia, PA. Visit this location or find the location closest to your project.

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Your store: Philadelphia, PA.

Your nearest location is Charleston, SC. Visit this location or find the location closest to your project.

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Your store: Charleston, SC.

Your nearest location is Nashville, TN. Visit this location or find the location closest to your project.

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Your store: Nashville, TN.

Your nearest location is Austin, TX. Visit this location or find the location closest to your project.

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Your store: Austin, TX.

Your nearest location is Dallas, TX. Visit this location or find the location closest to your project.

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Your store: Dallas, TX.

Your nearest location is Houston, TX. Visit this location or find the location closest to your project.

Your store: Houston, TX. See all locations.

Your store: Houston, TX.

Your nearest location is Manassas, VA. Visit this location or find the location closest to your project.

Your store: Manassas, VA. See all locations.

Your store: Manassas, VA.

Why can’t I install B-deck directly onto wood trusses?

Good news! You can install type b metal roof deck on wood trusses, but if the wood has been chemically treated, you will need to install a physical, water-resistant barrier between the wood and the metal roof deck to prevent accelerated corrosion.

Why do I need a physical barrier between the metal deck and pressure treated lumber?

Current formulations used for pressure treating lumber that are intended to be more environmentally friendly have proven to be highly corrosive when in direct contact with steel due to the dissimilar metal that is present. Some of the more corrosive treatments are ACQ (Alkaline Copper Quaternary) and CA-A or CA-B (Copper-azole).

What physical barrier should I use?

While there may be other suitable options, the Steel Deck Institute performed tests with the Grace Ice and Water Shield and found that it served as an effective barrier between the metal deck and pressure-treated lumber. For more information, please see the SDI position statement entitled Steel Deck Products in Contact with Pressure Treated Lumber that can be downloaded for free here.

What fasteners should I use?

Stainless steel fasteners provide the best corrosion resistance, but they are also the most expensive option. Hot-dipped galvanized fasteners perform better than zinc-plated fasteners (which should not be used), but you should consult your fastener supplier or manufacturer for specific recommendations.

As always, please ASK D-MAC when you encounter an uncommon application for metal deck. We’ll try to keep you out of trouble!