Taping Low Temperature Conditions

(1)  In cold weather, heat shall be provided to maintain a temperature of not below 10°C for 48 h prior to taping and finishing and maintained for not less than 48 h after that.

Article Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Drywall mudding temperature conditions

The taping and finishing of gypsum board should be done at 10°C (50°F) or higher. Before the
joints are taped, remove all loose paper and clean the joints. Fill all joints wider than 3 mm (1⁄8 in.) with joint compound and let it dry. Protect external corners with metal corner beads, and tape inside corners using paper tape folded as shown in Figure 165.

Joint compound is supplied premixed or in powder form that is mixed with water to a soft putty consistency. Apply the first layer of joint compound in a band 125 mm (5 in.) wide along the joint. Apply the tape and press it into the wet compound with a trowel or wide-blade putty knife. Remove excess compound, smooth the tape and feather the compound band to zero thickness at its outer edges.

After the first layer has dried, apply a second layer in a band 200 mm (8 in.) wide on recessed joints and 250 mm (10 in.) wide where the edges of the boa

Apply a third layer and feather to a band 250 to 300 mm (10 to 12 in.) wide on recessed joints and 400 mm (16 in.) on joints that are not recessed. Make this layer as smooth as possible to reduce sanding. When the third layer has set, sand the feathered edges lightly with fine sand paper and avoid damaging the paper surface of the gypsum board.

Nail and screw heads and indentations in the centre of the board are filled with two layers of joint compound.

Figure 165

Finishing of gypse and drywall

Source : Canada Mortgage and Housing Corporation (CMHC)