Lead Lined Drywall

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MarShield’s drywall is laminated with sheet lead that is designed to cover necessary surfaces or walls in a room requiring radiation shielding

Lead Drywall: also referred to as Lead-Lined Sheetrock, Gyproc, Wallboard or Lead-Lined Gypsum Board.

MarShield’s drywall is laminated with sheet lead that is designed to cover necessary surfaces or walls in a room requiring radiation shielding. It is affixed to surfaces or walls ensuring a continuous layer of sheet lead under the drywall to a specified height. It is used in new construction or shielding upgrades/renovations for P.E.T and other types of diagnostic imaging rooms.

Lead Drywall Product Details

MarShield starts with a piece of sheet lead which meets or exceeds Federal Specifications QQ-L-201F, Grade C, ASTM B-749-03, and Standard Specification for lead and lead alloy strip, sheet, and plate products. The lead sheet is 99.9% pure or better of un-pierced virgin lead, free of dross, oxide inclusions, scale, laminations, blisters and cracks and is factory laminated to drywall.

All of our leaded drywall product is furnished as type “X” fire code in 1/2″ to 5/8″ thickness with a lead thickness of 1/32″ to 1/8″ maximum thickness. The drywall conforms to ASTM C36 and Federal Specifications QQ-L-201 F, GRADE C, ASTM B-29. Pure lead sheet meeting Federal Specification QQ-L-201 F, Grade C and ASTM B749-03, Type L51121 is factory laminated under pressure to the back side of the drywall panel. Our lead drywall product meets U.S. and Canadian Safety Standards for 1 hour and 2 hour fire-rated partition applications.

Lead is factory pressure-laminated and adhered to the drywall with permanent adhesive in 48″ widths, equal to the width of the drywall, or in 49″ widths giving the lead a 1″ overlap at the vertical drywall joints. Due to the excessive weight, our drywall panels can be customized to smaller widths and lengths to suit most applications. 2″ wide batten strips can be supplied to cover all vertical joints where applicable. Smaller panels will require more batten strips but the ease of handling these lighter panels will be offset in the extra cost and labour during the installation process. Standard drywall panels are available in 48″ widths with 96″ or 120″ lengths.

Leaded drywall panels will be greater than, or equal to, the attenuation level specified by a health physicist.

For lead thicknesses that exceed 1/8” please refer to our lead lined plywood.

Installation

The installer will need to take into account the loss of shielding in all penetrations, seams and cut outs in the leaded drywall. Shielding will need to be added to all receptacle switches, fastener penetrations and seams created when applying the leaded drywall. In the majority of installation jobs the leaded drywall panels can be mounted directly to the metal or wood studs with standard drywall screws. These screws are then covered with a small diameter lead tab. These tabs are available in various thicknesses up to 1/8″ thick. Each fastener will be covered with a lead disc, equal in thickness to the lead that is laminated to the drywall to eliminate the possibility of radiation leakage at the point of fastening. Ensure the heads of the drywall screws are dimpled into drywall deep enough to allow the installer sufficient depth to glue the lead tabs over all screw heads with a quick-drying-time construction adhesive.

After gluing all screw heads with lead tabs, the installer can apply drywall compound and feather out all lead tabs with compound for a smooth drywall finish. Drywall can be taped, floated and finished as required. Lead drywall panels may be used in the ceiling but may require additional support or fasteners to hold the panels to the ceiling.

Lead Drywall can have lead laminated to the full drywall length or partial length – please specify.

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Lead Drywall Information Sheet
Lead Drywall Installation Information