|A Little Bit More of Exterior Painting|
|Wednesday, 25 November 2009 20:35|
Like interior paints, exterior paints are available in either solvent-filled or water-filled formulas and in three different lusters: gloss, semigloss, and flat. There are several differences between exterior and interior paint. First of all, exterior paints are more expensive. It is because they contain more resin and more pigment. This is for moisture and color respectively.
A safe choice on choosing exterior paint is to choose what was used last time. Just like interior paints, alkyd works better over alkyd, and latex over latex. If you can’t decipher what time of paint is on the house, go with the safe bet and use analkyd based paint.
Latex paints dry quickly, are easy to apply, and provide no problems with moisture because they “breath”. Cleaning up requires soap and water. These paints do not adhere as well to alkyd or oil based paints, or to poorly prepared surfaces, but. Alkyds, on the other hand, are very durable, but yet they are more difficult to work with and they dry at a very slow pace. Use solvents with alkyds to clean rollers, brushes, paint trays, and drips.
Alkyd paints have a self-cleaning, regulated property called “chalking”. After many years, the paint surface oxidizes. Each rainfall washes off a little bit of the paint -- along with dirt. As a result of this shedding, the surface of the paint constantly renews itself. There used to be chalky residue and shrubbery and nearby locations, but the new formulas tend to control the shedding.
Chalking paint should not be used for every house. In areas with not a lot of rainfall, the powder remains on the surface and dulls the paint. In wet regions, chalking paint would be unessecary because constant rainful would keep the house clean no matter what. If you live in either of these extremes, ask your local paint expert on what paint would be best for your climate.