Green Glue creates a great acoustic sandwich!
Green Glue is a constrained
layer damping material. It must be used between two layers of building
materials – i.e. plywood or drywall to be effective. Green Glue
is not effective as a paint or surface coating.
Performance is improved when additional layers are added to the sandwiched
tube of Green Glue will cover approximately 16 square feet. One sheet
of drywall (32 sq.ft.) will require 2 tubes of Green Glue. If budget
allows, the use of 3 tubes per sheet of drywall will slightly improve
the low-frequency performance around the primary resonance. Do not use
more than 3 tubes per sheet of material as the performance will worsen,
Glue can be applied in one of two ways:
Apply the Green Glue directly to the wall or ceiling, and then raise
a sheet of the building material (i.e. drywall) onto the wet surface.
Screw into place per normal building practices.
2. Apply the Green
Glue to the building material (i.e. drywall) while it is on the floor
or lift, then raise the panel and press onto the wall or ceiling. Screw
into place. This is considered a neater and cleaner method of installation.
the First Layer of Drywall
After hanging the
first layer of drywall it would be beneficial to seal the seams by using
caulking or by applying a setting type of drywall mud. Make sure the
first layer is smooth with no lumps and bumps. Any protruding bits of
mud or caulk will prevent the next layer from sitting flat against the
first layer of drywall.
Green Glue to the Sheet of Material
the tip opening in the Green Glue tube from 1/8” to 3/8”.
Apply 2 – 3 tubes of Green Glue over each 4’ X 8’
sheet. The application pattern is random, but it should be uniform throughout
the sheet. You can leave a border around the outside to make it easier
to carry the sheet without getting your hands in the Green Glue. This
will not affect the sound isolation performance.
Fastening the second layer of drywall on top of the first layer
For the best sheet to sheet contact, place the first screws in the centre
of the drywall, and work towards the outside edges.
Apply the second layer of drywall well within 15 mins. Drywall sheets
must be screwed together while the Green Glue is still wet.
I n construction applications screws are always used when using Green
Glue. Green Glue is in no way a replacement for screws. Screws assist
with the compression of the Green Glue into a thin film – they
will not degrade the performance.
Smell: Much like paint, when applying a lot of Green Glue you
will notice an odour. This is harmless and will dissipate quickly once
dry. Work in a well ventilated area. A cold room will not promote drying
and will slow down the drying process causing the smell to last longer.
Drying Time: Because Green Glue is water based, curing time
is required for effectiveness of treatment to be apparent. Expect 7
to 10 days drying time before sound isolation begins to improve. Low
temperature and high humidity increases cure time.
GREEN GLUE IS VERY STICKY!!
Take precautions to ensure that the Green Glue goes only where you want
it to. If the Green Glue contacts other surfaces, make sure it is removed
before it dries.
Products that clean well are Avon Skin So Soft Bath Oil* and citrus
based cleaners like Goof-Off* and Goo-Gone*. There is nothing harmful
about Green Glue, but it can be tough to clean up, especially after
it has dried. Installers should be advised to use drop cloths and latex
*Users of these and any other products are responsible
for determining suitability for their application.