Difference between revisions of "AY Honors/House Painting, Exterior/Answer Key"
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===Cleaning=== | ===Cleaning=== | ||
Once repairs have been made, the surfaces to be painted should be thoroughly cleaned. A pressure washer can do this effectively. Painting over dirt or algae growths is always a bad idea, as when the dirt flakes away, the paint will go with it and the house will be exposed to the elements. Do not rely on paint to cover the dirt and expect the paint to hold the dirt in place. It must be removed. | Once repairs have been made, the surfaces to be painted should be thoroughly cleaned. A pressure washer can do this effectively. Painting over dirt or algae growths is always a bad idea, as when the dirt flakes away, the paint will go with it and the house will be exposed to the elements. Do not rely on paint to cover the dirt and expect the paint to hold the dirt in place. It must be removed. | ||
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| + | ===Ladders and Scaffolding=== | ||
| + | Scaffolding is superior to ladders for painting because it allows you to work on a larger area for a long time before you have to move it to another area. However, scaffolding is considerably more expensive than a couple of ladders, so this option may not be viable for you. | ||
| + | |||
| + | When setting up a ladder, be sure the feet are on level ground. If placing it on a hillside, place something ''solid'' under the lower foot to raise it up. Test the stability of the ladder before climbing higher than a step or two. | ||
| + | |||
| + | Most people fall from ladders because they are reaching out too far. Do not make that mistake, as a fall from a ladder can cause serious injury, or even death. Keep your weight centered over the ladder, and do not attempt to reach over too far. Getting down and moving the ladder frequently is far easier than spending a few days in the hospital, and the painting will get done quicker that way too. | ||
| + | |||
===Scraping and Sanding=== | ===Scraping and Sanding=== | ||
After the exterior has been cleaned, it is time to begin removing the old paint. Paint that is well-adhered to the surface need not be removed, but all flaking paint ''must'' be. Paint should be scraped off with a scraper. In places where some paint is scraped off but other paint is well-adhered, the intersection between painted and unpainted should be sanded to make a smooth transition. Edges in the paint will cause the paint to drip there. | After the exterior has been cleaned, it is time to begin removing the old paint. Paint that is well-adhered to the surface need not be removed, but all flaking paint ''must'' be. Paint should be scraped off with a scraper. In places where some paint is scraped off but other paint is well-adhered, the intersection between painted and unpainted should be sanded to make a smooth transition. Edges in the paint will cause the paint to drip there. | ||
===Caulking=== | ===Caulking=== | ||
In places where the wood has been lightly cracked, it is appropriate to fill in the cracks with caulking. Be sure to select a caulk that can be painted (not all of them can be - some repel paint). Smooth the caulk with a putty knife, allow it to dry, and then sand it down. Also caulk around windows, doors, electrical entrances, vents, water faucets, etc. | In places where the wood has been lightly cracked, it is appropriate to fill in the cracks with caulking. Be sure to select a caulk that can be painted (not all of them can be - some repel paint). Smooth the caulk with a putty knife, allow it to dry, and then sand it down. Also caulk around windows, doors, electrical entrances, vents, water faucets, etc. | ||
| + | |||
| + | ===Masking=== | ||
| + | Apply masking tape to the glass near the edges of the panes. Alternately, you can go back and scrape paint from the glass after the paint dries, though it is generally better to mask it off in the first place. Be sure to remove tha masking tape when the paint has dried (and before you take down the ladder or the scaffolding!) | ||
===Priming=== | ===Priming=== | ||
Revision as of 03:58, 12 January 2009
1. Know and explain the difference in composition of exterior paints versus interior paints.
Adventist Youth Honors Answer Book/Vocational/ExteriorInteriorPaint
2. Tell how to prepare the outside of a house for painting by doing such items as preparation for new and old work, paint removal, priming, puttying, finishing, etc.
Preparing the house for repainting, if done properly, almost always takes longer than the painting itself. It is also the most crucial step in the entire job, as it is the foundation upon which the rest of the work relies.
Inspection & Repair
Begin by making a careful inspection of the entire house. Look for cracked or rotted boards. Severely cracked or rotten boards will need to be replaced, and this may require that you get a building permit (check with local authorities). You cannot simply caulk over rotten wood, as this does nothing to stop the process of decomposition. Soon after you caulk and paint over rotted wood, you will find that even more has rotted, and you will have an even bigger job to do.
Check around the edges of the roof for flashing. All the fascia should be covered with metal flashing to protect the wood from weather. Doors and windows should also have drip edging to direct the water away from the openings and to the outside of the house's siding.
Cleaning
Once repairs have been made, the surfaces to be painted should be thoroughly cleaned. A pressure washer can do this effectively. Painting over dirt or algae growths is always a bad idea, as when the dirt flakes away, the paint will go with it and the house will be exposed to the elements. Do not rely on paint to cover the dirt and expect the paint to hold the dirt in place. It must be removed.
Ladders and Scaffolding
Scaffolding is superior to ladders for painting because it allows you to work on a larger area for a long time before you have to move it to another area. However, scaffolding is considerably more expensive than a couple of ladders, so this option may not be viable for you.
When setting up a ladder, be sure the feet are on level ground. If placing it on a hillside, place something solid under the lower foot to raise it up. Test the stability of the ladder before climbing higher than a step or two.
Most people fall from ladders because they are reaching out too far. Do not make that mistake, as a fall from a ladder can cause serious injury, or even death. Keep your weight centered over the ladder, and do not attempt to reach over too far. Getting down and moving the ladder frequently is far easier than spending a few days in the hospital, and the painting will get done quicker that way too.
Scraping and Sanding
After the exterior has been cleaned, it is time to begin removing the old paint. Paint that is well-adhered to the surface need not be removed, but all flaking paint must be. Paint should be scraped off with a scraper. In places where some paint is scraped off but other paint is well-adhered, the intersection between painted and unpainted should be sanded to make a smooth transition. Edges in the paint will cause the paint to drip there.
Caulking
In places where the wood has been lightly cracked, it is appropriate to fill in the cracks with caulking. Be sure to select a caulk that can be painted (not all of them can be - some repel paint). Smooth the caulk with a putty knife, allow it to dry, and then sand it down. Also caulk around windows, doors, electrical entrances, vents, water faucets, etc.
Masking
Apply masking tape to the glass near the edges of the panes. Alternately, you can go back and scrape paint from the glass after the paint dries, though it is generally better to mask it off in the first place. Be sure to remove tha masking tape when the paint has dried (and before you take down the ladder or the scaffolding!)
Priming
Bare wood should have a coat of primer before the paint is applied. Primer is applied the same way paint is, so you can follow the instructions given below.
Painting
After all that has been done, you are finally ready to paint. If using a can of paint, pry the lid from the can with a common screw driver or with a tool designed for this purpose. If the paint was shaken at the paint store within a day or so of being opened, all you will need to do is stir it briefly. If it has been sitting for a while, you will need to stir it more thoroughly. Failure to properly stir the paint may cause the color to change as the can is used.
Some painters like to punch a hole in the rim of the can so that paint can drip out of the rim and into the can. This hole will be completely covered by the lid when it is replaced, and can be made with an awl or with a nail.
When replacing the lid, be sure to wipe all the paint from the rim of the can. Place the lid on the rim, and then lightly tap around the edges to seal it. If the rim was insufficiently cleaned, paint will splatter all over the place, so it is important to do that job carefully.
If using a brush, dip the tip of the brush into the paint no more than an inch or so. Wipe the paint from one side of the brush onto the inner side of the can's rim. Then raise it to the surface to be painted and brush it on with a smooth horizontal motion.
Don't completely empty the brush before refilling it with paint. It takes a lot longer to paint a house with a brush that is empty most of the time.
3. List ten proper color schemes for house painting (if possible, use color charts from a paint shop in making the display).
4. Tell how to prepare and paint metal properly.
All rust and flaking paint should be removed before applying new paint. Heavy flakes can be removed with a wire brush, or with a wire brush attachment for an electric drill. Once the heavy flakes and rust have been removed, go over the surface with sandpaper.
Next, determine what type of solvent is used for cleaning the paint. This will depend on the type of paint chosen, and could be turpentine, mineral spirits, paint thinner, or some other solvent. Dampen a clean rag with the solvent and clean the metal with it. Once the solvent dries, the surface is ready for primer. You may use either one or two coats of primer. Follow the directions on the can to determine the amount of time needed between coats. The time between coats of primer may differ from the time between the final coat of primer and the first coat of paint.
5. Name at least three paint thinners and give their specific uses.
6. Show ability to properly use brush, roller, and spray equipment in outside work.
7. Paint the outside of a house with at least four rooms (if possible, make this a group project for a special-needs person in the church or community).
Historical Notes
Adventist Youth Honors Answer Book/Painting/History
