A pressure washer is a machine that can clean many different types of surfaces using water pressure. Pressure washers have been around for several years but have only recently become so affordable that many households purchase them instead of renting them from the local hardware store. Perhaps your wood deck is in need of cleaning and repainting, or maybe your concrete porch is scuffed and stained. Whatever your problem, a pressure washer is likely to help.
Pressure washers can generate significantly more water pressure than a garden hose. In fact, most domestic pressure washers available for home use actually utilize your garden hose and its water supply. A pressure washer can increase your garden hose’s pressure by 15 to 50 times, or more. Not only does this increased pressure help clean better, but it also cuts down on the amount of water you use.
The main function of a pressure washer is to multiply the pressure output from a garden hose and concentrate the water into a pressurized stream. The machine does so by utilizing an electric or gasoline-powered engine to run a highly efficient pump. This pump acts as a compressor and allows the pressure washer to output a concentrated and pressurized stream of water. After running through the pump, the water exits the pressure washer via a hose connected to a long handle that the user controls. A trigger allows the user to spray the pressurized stream in short bursts, or in a continuous spray. The stream’s intensity can be adjusted on most pressure washers and is very effective at removing surface grime and dirt.
Pressure washers come in several different types. Gasoline powered washers are typically rated between 5-7 horsepower and may maintain a higher pressure than their electric counterparts. Electric washers may be suitable for tasks where you do not want to blast the surface you are working with, but require more pressure than a garden hose. For example, when washing the windows on your house, using a gasoline powered pressure washer might provide too much pressure. An electric washer would most likely be more ideal.
Pressure washers can also be characterized as cold or hot. Cold pressure washers are generally less expensive but may be less effective at cleaning dirty areas than their hot counterparts.
More important than the horsepower of a washer is the pump inside the washer. Pumps are rated in both PSI (pounds per square inch), which measures pressure, and GPM (gallons per minute), which measures water flow. When considering a washer, be sure to check for these specifications. The higher each number is, the more powerful the washer will be.
The cost of a pressure washer generally ranges from $200-$500 US dollars (USD). If you are looking for a more powerful model to strip paint or remove heavy stains and grease, expect to pay about twice that. Typically, spending more money on a pressure washer gets you a better quality washer, that has a better pump and a better engine and produces better results.
Keep in mind, however, that the more powerful the washer, the heavier it is likely to be. So, if portability is an issue, you should find a good compromise between power and weight.
For a new exterior paint application to succeed, the siding must be very clean—a job that can be pretty laborious if done by hand-scrubbing. A pressure washer offers a quick and easy way to get the job done, but it can be tricky to use on siding. If you aren’t careful, the high water pressure makes it fairly easy to damage the siding or even cause water damage to the sheathing and wall cavities beneath the siding.
Hand-Washing vs. Pressure Washing
There are certainly advantages to cleaning your house by hand prior to painting if you have the time and energy. If you’ve ever taken your car through a touchless car wash, you know that washing without physical contact produces only adequate results. After a touchless wash, a white cloth wiped across the car may still pick up dirt.
The same holds true of washing your house’s siding before painting—the very best results will be achieved by hand-washing with soap, water, and brushes. But realistically, it is very difficult and time-consuming to wash an entire house by hand, and a pressure washer can do an adequate job in a manner that is much, much easier.
Don’t Skip the Cleaning
While there are many advantages to cleaning your home’s exterior before painting it‚ one virtue stands out above all others: Clean siding means your exterior paint will last longer.
Although paint manufacturers might lead you to believe that the world will end if you don’t clean the siding before painting, the reality is not quite that dire. The paint will go on just fine, but by painting dirty siding, you seriously shorten your paint’s lifespan. Rather than requiring a new paint job in three or four years, wouldn’t you rather paint your house every seven to 10 years? Considering how hard and expensive it is to paint house exteriors, it’s a good idea to get it right the first time.
Take Caution With Pressure Washers
The point of pressure washing your house siding prior to painting is to wash it, not to strip the paint. True, most pressure washers are powerful enough to take off paint, but for best results, stripping should be a separate step done with a scraper, sander, or heat gun after the process of washing
Pressure washing siding sometimes gets a bad name because of two dangers:Etching: Under certain conditions, pressure washers can cut into concrete and brick, so imagine the potential effect on cedar, vinyl, or even fiber-cement siding. This inadvertent etching is easy to avoid, though, if you simply stand far enough away when aiming your sprayer at the siding. Depending on your washer’s PSI rating, this might mean anywhere from 18 inches to 6 feet away, minimum. In addition, use a fan-spray nozzle, not a stream nozzle, which has a needle-sharp spray that can rip lines into the siding.
Injecting: Be careful of spraying at low angles under the siding. The high pressure can drive water upwards between the siding boards and soak the sheathing and/or insulation of the wall interior. To prevent this, never spray at an upward angle to the siding—only perpendicular or slightly downward. Watch out for other openings, such as heating exhaust vents, air vents in the attic or crawl space, and cracks around windows and doors.
WORKING TIME: 3 – 5 hrs
TOTAL TIME: 3 – 5 hrs
SKILL LEVEL: Beginner
ESTIMATED COST: $50 to $250
For a new exterior paint application to succeed, the siding must be very clean—a job that can be pretty laborious if done by hand-scrubbing. A pressure washer offers a quick and easy way to get the job done, but it can be tricky to use on siding. If you aren’t careful, the high water pressure makes it fairly easy to damage the siding or even cause water damage to the sheathing and wall cavities beneath the siding.
Hand-Washing vs. Pressure Washing
There are certainly advantages to cleaning your house by hand prior to painting if you have the time and energy. If you’ve ever taken your car through a touchless car wash, you know that washing without physical contact produces only adequate results. After a touchless wash, a white cloth wiped across the car may still pick up dirt.
The same holds true of washing your house’s siding before painting—the very best results will be achieved by hand-washing with soap, water, and brushes. But realistically, it is very difficult and time-consuming to wash an entire house by hand, and a pressure washer can do an adequate job in a manner that is much, much easier.
Don’t Skip the Cleaning
While there are many advantages to cleaning your home’s exterior before painting it‚ one virtue stands out above all others: Clean siding means your exterior paint will last longer.
Although paint manufacturers might lead you to believe that the world will end if you don’t clean the siding before painting, the reality is not quite that dire. The paint will go on just fine, but by painting dirty siding, you seriously shorten your paint’s lifespan. Rather than requiring a new paint job in three or four years, wouldn’t you rather paint your house every seven to 10 years? Considering how hard and expensive it is to paint house exteriors, it’s a good idea to get it right the first time.
Take Caution With Pressure Washers
The point of pressure washing your house siding prior to painting is to wash it, not to strip the paint. True, most pressure washers are powerful enough to take off paint, but for best results, stripping should be a separate step done with a scraper, sander, or heat gun after the process of washing.
Pressure washing siding sometimes gets a bad name because of two dangers:
Etching: Under certain conditions, pressure washers can cut into concrete and brick, so imagine the potential effect on cedar, vinyl, or even fiber-cement siding. This inadvertent etching is easy to avoid, though, if you simply stand far enough away when aiming your sprayer at the siding. Depending on your washer’s PSI rating, this might mean anywhere from 18 inches to 6 feet away, minimum. In addition, use a fan-spray nozzle, not a stream nozzle, which has a needle-sharp spray that can rip lines into the siding.
Injecting: Be careful of spraying at low angles under the siding. The high pressure can drive water upwards between the siding boards and soak the sheathing and/or insulation of the wall interior. To prevent this, never spray at an upward angle to the siding—only perpendicular or slightly downward. Watch out for other openings, such as heating exhaust vents, air vents in the attic or crawl space, and cracks around windows and doors.
Types of Pressure Washers
Pressure washers come in both gas- and electric-powered models. Since you want to treat your siding gently, you won’t need a high-powered gas washer; an electric one will suffice. A washer with a PSI rating of 1,000 to 1,500 is usually quite sufficient for washing siding. If you have a two-story house, a high-volume gas pressure washer fitted with a special nozzle will allow you to clean the upper areas while standing on solid ground.
What You’ll Need
Equipment / Tools
Garden hose
Pressure sprayer and nozzles
Ladders (if needed)
Bucket
Sponge
Materials
Cleaning solution
Plastic sheeting
Instructions
Protect Landscape Plantings and Utilities
Where foundation shrubs or other plants are blocking the siding, protect them with sheets of plastic to prevent the pressure sprayer from stripping leaves off the plants. Damage to shrubs will rarely kill the plant, but it can disfigure it for the current growing season.
Also, cover air conditioner compressors and other electrical utilities with sheets of plastic before pressure washing the siding.
Spray off the Major Debris
Using the pressure sprayer, rinse the siding with plain water (no cleaning solution), working from the top down. For this step, a wide spray angle and relatively low pressure should do the trick. Your goal is to knock down most of the visible debris: insect nests, leaves, and the majority of the dirt. Let the siding dry.
Apply Bleach Solution to Mildew Areas
If your siding has areas that are discolored with mildew, mix up a batch of treatment solution consisting of one part bleach to 10 parts water. Sponge the solution onto the discolored areas. A garden sprayer can also be used to apply the bleach solution. Be careful to avoid spilling the bleach solution on shrubs and other landscape plants. No scrubbing is necessary; the bleach alone will kill the mildew.
Spray With Cleaning Solution
Complete this step when the siding is not in direct sunlight and when winds are calm.
Fill up your pressure washer’s tank with cleaning solution, then spray the siding with the water-solution mixture, working from the bottom up. Use a low pressure and wide sprayer angle while applying the cleaning solution. Your pressure washer’s instructions will indicate the proper settings for applying the cleaning solution.
Make horizontal passes along the siding, gradually moving upward but consistently using a slightly downward angle when spraying. A stepladder may assist here; move up a step or two with each pass so that you can continue pointing downward at the siding.
Rinse the Siding
Let the solution work for about 10 minutes, then rinse with fresh water from the top down. While cleaning should always be done from the bottom up, rinsing should be done from the top down to prevent dirty water from running over the clean areas.
Rinsing usually calls for a more powerful pressure setting and wide spray pattern, but again, make sure to follow the manufacturer’s recommendations for the type of siding you have. Make sure to rinse thoroughly; this is where the major cleaning is done. To avoid damage, start rinsing with the nozzle held a fair distance from the siding, and gradually move closer. Back up again if you see any kind of damage occurring to the siding.
Let everything dry for 48 hours before painting or until any bare wood is 100 percent dry. If a couple of weeks pass before you can get to painting, an additional spray-down with fresh water is a good idea. It’s surprising how fast spiders can move in and dust can settle after cleaning.
Tips for Pressure Washing
If you have valued shrubs and other landscape plants near your house, make sure to use a cleaning solution that does not contain bleach or other chemicals that might harm plants.
It is best to test your sprayer on an unobtrusive section of siding, such as behind landscape plantings or the back of a garage. Used incorrectly, a pressure washer can damage wood siding or crack vinyl siding.
Work in relatively small areas, rinsing, applying detergent, and rinsing each area before moving on to the next section. This will prevent the detergent from drying on the surface of the siding.
An adequate pressure washer can be purchased for $150 to $250 dollars, or you can rent one for $50 to $75 per day. Once you learn how to use it, you may find many other uses for the tool; buying one might be a good investment.
Some pressure washers have rotating brush attachments. These accessories can work well for siding that has thick layers of grime.
Types of Pressure Washers
Pressure washers come in both gas- and electric-powered models. Since you want to treat your siding gently, you won’t need a high-powered gas washer; an electric one will suffice. A washer with a PSI rating of 1,000 to 1,500 is usually quite sufficient for washing siding. If you have a two-story house, a high-volume gas pressure washer fitted with a special nozzle will allow you to clean the upper areas while standing on solid ground.
What You’ll Need
Equipment / Tools
Garden hose
Pressure sprayer and nozzles
Ladders (if needed)
Bucket
Sponge
Materials
Cleaning solution
Plastic sheeting
Instructions
Protect Landscape Plantings and Utilities
Where foundation shrubs or other plants are blocking the siding, protect them with sheets of plastic to prevent the pressure sprayer from stripping leaves off the plants. Damage to shrubs will rarely kill the plant, but it can disfigure it for the current growing season.
Also, cover air conditioner compressors and other electrical utilities with sheets of plastic before pressure washing the siding.
Spray off the Major Debris
Using the pressure sprayer, rinse the siding with plain water (no cleaning solution), working from the top down. For this step, a wide spray angle and relatively low pressure should do the trick. Your goal is to knock down most of the visible debris: insect nests, leaves, and the majority of the dirt. Let the siding dry.
Apply Bleach Solution to Mildew Areas
If your siding has areas that are discolored with mildew, mix up a batch of treatment solution consisting of one part bleach to 10 parts water. Sponge the solution onto the discolored areas. A garden sprayer can also be used to apply the bleach solution. Be careful to avoid spilling the bleach solution on shrubs and other landscape plants. No scrubbing is necessary; the bleach alone will kill the mildew.
Spray With Cleaning Solution
Complete this step when the siding is not in direct sunlight and when winds are calm.
Fill up your pressure washer’s tank with cleaning solution, then spray the siding with the water-solution mixture, working from the bottom up. Use a low pressure and wide sprayer angle while applying the cleaning solution. Your pressure washer’s instructions will indicate the proper settings for applying the cleaning solution.
Make horizontal passes along the siding, gradually moving upward but consistently using a slightly downward angle when spraying. A stepladder may assist here; move up a step or two with each pass so that you can continue pointing downward at the siding.
Rinse the Siding
Let the solution work for about 10 minutes, then rinse with fresh water from the top down. While cleaning should always be done from the bottom up, rinsing should be done from the top down to prevent dirty water from running over the clean areas.
Rinsing usually calls for a more powerful pressure setting and wide spray pattern, but again, make sure to follow the manufacturer’s recommendations for the type of siding you have. Make sure to rinse thoroughly; this is where the major cleaning is done. To avoid damage, start rinsing with the nozzle held a fair distance from the siding, and gradually move closer. Back up again if you see any kind of damage occurring to the siding.
Let everything dry for 48 hours before painting or until any bare wood is 100 percent dry. If a couple of weeks pass before you can get to painting, an additional spray-down with fresh water is a good idea. It’s surprising how fast spiders can move in and dust can settle after cleaning.
Tips for Pressure Washing
If you have valued shrubs and other landscape plants near your house, make sure to use a cleaning solution that does not contain bleach or other chemicals that might harm plants.
It is best to test your sprayer on an unobtrusive section of siding, such as behind landscape plantings or the back of a garage. Used incorrectly, a pressure washer can damage wood siding or crack vinyl siding.
Work in relatively small areas, rinsing, applying detergent, and rinsing each area before moving on to the next section. This will prevent the detergent from drying on the surface of the siding.
An adequate pressure washer can be purchased for $150 to $250 dollars, or you can rent one for $50 to $75 per day. Once you learn how to use it, you may find many other uses for the tool; buying one might be a good investment.
Some pressure washers have rotating brush attachments. These accessories can work well for siding that has thick layers of grime.
While power washing and pressure washing are both very effective means of cleaning a wide range of surfaces and objects, there are a few distinctive qualities about each method. Because of these differences, there are a few applications that are better suited for specific situations.
Power washing typically makes use of a steady and somewhat powerful stream of hot water. The temperature of the water is key to allowing the power washing equipment to work properly. By setting the temperature gauge to a specific setting, it is possible to dislodge items such as chewing gum from sidewalks and decks with ease. At the same time, the stream of hot water also comes in handy in killing moss and weeds, and ridding the surface of any mold or mildew that has built up. If there is a lot of gunk and other matter to cut through, a power wash is the way to go.
By contrast, pressure washing relies on the force of the water stream rather than the temperature. A pressure wash works very well for cleaning surface dirt from walkways, walls, patios and decks. Pressure washing masonry cleaning is especially common, as the technique does an excellent job with any type of concrete, brick, or cinder block construction. When there is no ground-in dirt or mold to contend with, pressure washing provides a quick and easy cleaning solution.
It is not unusual for people to confuse the two washing methods, since both of them utilize a high-pressure stream of water as part of the cleaning process. For the most part, the easiest way to remember the difference is that power washing does not tend to involve cold water, while pressure washing may use water of any temperature.
Power and pressure washing supplies are normally available at any home store, as well as most hardware stores. In comes cases, equipment and supplies can also be found at lawn and garden shops. Prices vary, depending on the size of the machine purchased. Models that are ideal for use around a small home are generally affordable, while larger models designed for industrial use then to cost considerably more.
Before attempting to operate any type of power or pressure washing equipment, it is a good idea to read the instruction manual thoroughly. The manuals usually have excellent advice on how to adjust the water pressure for different types of surfaces, temperature settings that will effectively melt or remove hardened substances from walkways and patios, and suggestions for any type of additional cleaning compounds that are safe for use with the equipment.
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