Lead-lined Drywall: MarShield™ Building Products
Lead-lined sheetrock is manufactured by applying and bonding a single unpierced sheet of lead to the appropriate length of gypsum board. Since sheet lead has very little inherent structural strength, most medical and industrial x-ray installations require that it be supported in this fashion. Alternatively, sheet lead may be laminated to provide a more rigid building material.
Leaded drywall sheets are available in sizes from 4' x 8' to a maximum 4' x 10' x minimum 5/8" thickness. Thinner drywall (1/2") is available, but not recommended. The lead lining on sheetrock or lead-lined gypsum boards ranges from 1/32" to 1/16" lead thickness. Drywall can be lined with 1/8" lead, although the heavy weight makes it inadvisable.
MarShield™ recommends the use of lead-lined gypsum board or leaded drywall (sheet lead that is factory bonded to a material) for wall covering applications. This allows the lead to remain rigid and flat during installation and insures a continuous meeting edge when installed correctly.
Due to the extreme weight of lead lined drywall, extra care must be taken during handling, storage and installation. Install the leaded side of the sheetrock against wooden or metal studs ensuring that you match the joints of the lead lining. A minimum lead overlap of one inch is required at all drywall joints and corners. Extend the lead overhang at least one inch into all frames or openings. Sheet lead over 1/16" thick should have a minimum 2" overhang. MarShield™ recommends the use of drywall screws wherever possible. If using lead-headed nails (on wood studs only), then ensure that you drive them to the proper depth and cover them with drywall compound.
