Tempo:
Exterior Coatings The durability of exterior coatings depends on whether the coating permits the movement of moisture, thereby avoiding blistering, and excludes the ultraviolet portion of sunlight, which causes the coating to deteriorate. Wood products treated with water-borne wood preservatives can be coated using the same products and techniques as for untreated materials. As is the case with all wood products used in exterior applications, coating performance will be best if the moisture content of the underlying material is 19 per cent or less. Primer provides some early protection and ensures adhesion between wood and topcoats. Prime surfaces for painting as quickly as possible after installation. As wood weathers, it takes on a grey appearance that can seriously affect adhesion of paint. Sand it off before priming. Use alkyd paints for doors and trim where durability is needed, and latex paints for wood cladding to allow moisture movement and minimize the potential for blistering. Varnish made for exterior use contains no colour pigment and has only limited ability to screen ultraviolet light. This means varnish
is a high-maintenance coating for exterior applications with 4 or 5 coats required initially and annual coatings afterward.
Interior Coatings Interior surfaces are painted to provide a pleasing appearance and to protect them from damage by moisture that is prevalent in the kitchen, bathroom and laundry rooms. Painted surfaces are also easier to clean. Wall and ceiling gypsum board finishes are painted. Doors, trim, and interior millwork may be painted, stained or varnished. To prevent running or sagging, varnish should not be applied in thick coats. Two thin coats, with light sanding and sufficient drying time between, are adequate for most residential applications. Items such as stair treads and handrails may warrant a third coat. When performing interior painting, provide sufficient ventilation and lighting. Solvent-based paints and cleaners should be stored outside the living space. Dispose of all rags, paints, stains and thinners in an appropriate manner, usually at special depots for toxic wastes. In all cases, follow the manufacturer’s application instructions to attain proper finish appearance and performance.
SUSTAINABLE HOUSING INSIGHT Healthy Indoor Environment
Use water-based low VOC paint, stain and varnish. The fumes from oil-based paint, stain and varnish are flammable and containers should be stored away from sources of heat and flame. Store products outside the living space.
Affordability
Paint, stain and varnish are low-cost finishes that can be easily changed without damage to materials. Exterior paint, stain and varnish must be periodically inspected and repaired to protect the house from deterioration and prevent costly replacement.
is a high-maintenance coating for exterior applications with 4 or 5 coats required initially and annual coatings afterward.
Interior Coatings Interior surfaces are painted to provide a pleasing appearance and to protect them from damage by moisture that is prevalent in the kitchen, bathroom and laundry rooms. Painted surfaces are also easier to clean. Wall and ceiling gypsum board finishes are painted. Doors, trim, and interior millwork may be painted, stained or varnished. To prevent running or sagging, varnish should not be applied in thick coats. Two thin coats, with light sanding and sufficient drying time between, are adequate for most residential applications. Items such as stair treads and handrails may warrant a third coat. When performing interior painting, provide sufficient ventilation and lighting. Solvent-based paints and cleaners should be stored outside the living space. Dispose of all rags, paints, stains and thinners in an appropriate manner, usually at special depots for toxic wastes. In all cases, follow the manufacturer’s application instructions to attain proper finish appearance and performance.
SUSTAINABLE HOUSING INSIGHT Healthy Indoor Environment
Use water-based low VOC paint, stain and varnish. The fumes from oil-based paint, stain and varnish are flammable and containers should be stored away from sources of heat and flame. Store products outside the living space.
Affordability
Paint, stain and varnish are low-cost finishes that can be easily changed without damage to materials. Exterior paint, stain and varnish must be periodically inspected and repaired to protect the house from deterioration and prevent costly replacement.
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