Search HowStuffWorks and the web:
 

Any household requires general home repair. Learn how to fix leaky roofs and sticky doors and use general home repair tips to knock items off your to-do list.


Inside This Article
4. 
Interior Paints
5. 
Exterior Paints and Abrasives
6. 
See all General Repairs articles

Exterior Paints and Abrasives

One of the major differences between indoor and outdoor painting is, with outdoor painting, there is a wider range of exterior surfaces to consider. These surfaces include clapboard and aluminum siding, wood shingles, tar shingles, cedar shakes, brick, concrete block, stucco, and, of course, old paint. On many older homes, you'll find a combination of these surfaces. Fortunately, there is a paint for every type of surface, and some paints are suitable for more than one surface.

Exterior Paints Guide
Choosing the correct exterior paint can be a complicated process. For a guide to the range of exterior coatings,
click here.

Like interior paints, exterior paints are available in either water-thinned or solvent-thinned formulas and in three lusters: flat, semigloss, and gloss. There are, however, several characteristics that distinguish exterior coatings from those used inside the house. For one thing, exterior paints are more expensive. They also contain more resin (for moisture resistance and durability) and more pigment (for color).

You may want to choose your paint based on what was used before. As with interior paints, latex works best over latex and alkyd works best over alkyd. If you can't tell or are unsure about what type of paint is on the house, use an alkyd-base paint.

Latex paints are easier to apply, dry quickly, and can help minimize moisture problems because they "breathe." Cleaning up is a matter of soap and water. These paints do not adhere as well to oilbase or alkyd-base paints or to poorly prepared surfaces, however. Alkyds, on the other hand, are extremely durable, but they are more difficult to work with and they dry slowly. Also, solvents must be used with alkyds to clean brushes, rollers, paint trays, and drips.

One of the alkyd types of exterior paint may be especially appealing because of its regulated, self-cleaning property. It's called "chalking," and that's exactly what it does. Over a period of years, the paint surface slowly oxidizes. Each rainfall washes off a minute quantity of the paint -- along with dirt. As a result of this shedding, the paint surface is constantly renewing itself. The price of this convenience used to be chalky residue on foundations and shrubs, but the newest formulas control the shedding so it doesn't stain adjacent surfaces.

Chalking paint is not recommended for every house. In areas with little rainfall, for example, the powder tends to remain on the surface, dulling the paint. In wet regions, chalking paint may not be worth the extra expense because frequent rainfalls will keep the outside of the house clean no matter what kind of paint is used. If you live in or near either of these climatic extremes, ask your paint dealer if the chalking type is suitable for your area.

Abrasives

Choosing the proper abrasive tool for a home-repair job usually means the difference between mediocre results and a truly professional appearance. Depending on the task, you'll choose between sandpaper, steel wool, and a file.

Sandpaper Guide
Sandpaper comes in myriad forms.
Click here for a chart containing information on sandpaper types and uses.

Sandpaper: Most do-it-yourselfers still refer to various grades of "sandpaper," but the proper term for these sanding sheets is "coated abrasives." There are four factors to consider when selecting any coated abrasive: the abrasive mineral, or which type of rough material; the grade, or the coarseness or fineness of the mineral; the backing (paper or cloth); and the coating, or the nature and extent of the mineral on the surface.

Paper backing for coated abrasives comes in four weights: A, C, D, and E. A (also referred to as "Finishing") is the lightest weight and is designed for light sanding work. C and D (also called "Cabinet") are for heavier work, while E is for the toughest jobs. The coating can be either open or closed. Open coated means the grains are spaced to only cover a portion of the surface. An open-coated abrasive is best used on gummy or soft woods, soft metals, or on painted surfaces. Closed coated means the abrasive covers the entire area. They provide maximum cutting, but they also clog faster and are best used on hard woods and metals.

There are three popular ways to grade coated abrasives. Simplified markings (coarse, medium, fine, very fine, etc.) provide a general description of the grade. The grit refers to the number of mineral grains that, when set end to end, equal 1 inch. The commonly used O symbols are more or less arbitrary. The coarsest grading under this system is 41/2, and the finest is 10/0, or 0000000000.

Electric Sander: Need to sand a surface but don't have all day? An orbital sander is the handiest for most small projects. Since it's power tool, it can make sanding jobs easier and quicker.

Steel Wool Guide
There are many grades of steel wool on the market.
Click here for details on the various uses for steel wool.

Steel Wool: Steel wool comes in many grades of coarseness. Always apply the correct grade of steel wool to the work you have at hand, as detailed in the chart available at the right.

Files: A wood rasp, with a rasp and/or curved-tooth cut, is used to remove excess wood. The piece of wood is final-smoothed with a single-cut or double-cut file. You may not need files for most quick fixes. If you do decide to add some to your home-repair toolbox, buy an assortment of flat files -- wood rasp, bastard, second-cut, and smooth.

Now you know all the basic materials used in most home repair projects. Once you start fixing up your home, the objects described within this article will become only too familiar to you.

Publications International, Ltd.

Inside This Article
4. 
Interior Paints
5. 
Exterior Paints and Abrasives
6. 
See all General Repairs articles

 



Share This Article: (what's this?)



More Options:



ADVERTISEMENT
Browse Browse Videos Browse Videos