- Q.When installing drywall
over existing wall finishes, we often need to use long
fasteners to reach the underlying framing members. Can
galvanized roofing nails be used to fasten drywall in
these situations?
A.John Minoia responds:
Ring-shank drywall nails are typically available in
up to 2-inch lengths. When longer fasteners are
required, galvanized roofing nails (generally
available in up to 3-inch lengths) can be used. But
you may want to consider using long drywall screws
— they’re available in lengths up
to 6 inches, and offer higher withdrawal values
than roofing nails.
An alternative fastening method is to use "rock
to rock" drywall laminating screws and construction
adhesive. Apply adhesive to the existing wall
surface, then "clamp" the new sheet to the
underlying material with the laminating screws
while the adhesive cures. The wide-bodied threads
of the laminating screw provide more holding power
than a standard drywall screw. It’s
important that the existing wall surface is clean,
sound, and compatible with the construction
adhesive.
John Minoia, Jr., is a sales
representative for the U.S. Gypsum
Company.