Weekly
Column
This Is A Hammer
By
Samantha MazzottaGlum Over Glue
Q: I have two
questions. First, we are going to take down some
old wall paneling from around the tub that was
glued to Gyprock with what looks like very good
glue. What, if anything, will remove this glue?
Second, can we put
(imitation) hardwood flooring on the cement floor
in the basement? Marvin H., via e-mail
A: To your first
question, I say, "oy." Removing old
glue from the walls can be difficult for many
reasons, including how well it has adhered to the
Gyprock (paneling made up of a gypsum core
sheathed in linerboard).
The glue
youre dealing with is most likely a wet
area paneling adhesive (a polychloroprene
rubber-based sealant usually sold next to Gyprock
or Sheetrock products). Its designed to
form a flexible heat- and moisture-resistant bond
between the wall paneling and Gyprock in warm,
humid areas of the house, such as your bathroom.
So how do you
clean it off the plasterboard? Start with careful
steps, and then progress to tougher measures,
since the exact brand of adhesive isnt
known.
First, try heating
the old glue with a hair dryer or a heat gun.
Bring the temperature above 140 degrees F, and
then try to gently scrape away the softened glue
with a putty knife, being careful not to tear the
sheathing.
If this
doesnt work, a tougher measure is required.
Apply mineral spirits or petroleum jelly to the
glue, and let the solvents soak in for anywhere
from several hours to several days. Try an
adhesive remover as well, but make sure its
the right solvent for the right product (in this
case, wet area paneling adhesive). As with any
solvent, make sure the room is well-ventilated
throughout this process.
As to your second
question: Yes, its possible to install
imitation (laminate) hardwood flooring directly
over cement, but Id recommend against it.
Concrete is porous, so a thin (6 millimeter)
polyethylene film should be installed over the
floor as a vapor barrier to keep out moisture
that could cause mold and eventual warping. A
foam underlayment is also recommended, to reduce
noise.
Prior to
installation, make sure that the concrete is
clean, dry and flat; fill in any indentations
greater than 3/16 inch with a leveling compound,
and smooth out ridges in the cement.
|