How long does concrete need to cure prior to the application of a coating system?
Concrete must be cured for a minimum of 28 days and must have moisture content less than 15%.
How do I prepare a concrete slab for application of a coating system?
The concrete can be prepared for coating by bead-blasting, diamond grinding, or acid-etching and neutralizing. If acid-etching is done, the slab must be allowed to dry for 24-48 hours after all water has been removed.
How much slope is required on the substrate?
1/4-inch per foot of slope is required on all decks
Do I need to vent pan-poured concrete decks?
Concrete pans must be vented with a 1/4-inch hole every foot along the base of the flute. Unvented pans will cause blistering of the coating systems.
How do I prepare a plywood deck for application of a coating system?
First, plywood seams and flashing to deck transitions must be reinforced using a white glass or polyester reinforcing tape set into a base of urethane coating. Metal flashings and door pans must be primed using a manufacturers' recommended primer.
How to I resurface an existing waterproof deck system?
Due to regional restrictions of certain cleaning products, you should consult the manufacturer for recommended cleaning and recoating procedures.
How do I apply a waterproof coating system?
Products can be applied using a notched or flat trowel, brush, paint roller, or a notched squeegee. When using a trowel or squeegee, you must back roll the coating to smooth out the trowel/squeegee marks.
Can I thin the coating?
The coating should only be thin when suggested and approved by the manufacturer and should never exceed 5% dilution. (Never use an alcohol based thinner to dilute urethane coatings.)
What caused my deck to bubble and blister?
Bubbles and blisters are caused by moisture in the substrate, substrate out-gassing, air entrapment while mixing or over-application of the material. Blisters should be cut out and repaired prior to the application of any subsequent coats.