It Looks Easier Than It Is
Pressure Washing Pitfalls
- Using too much pressure. Water pressure is measured in pounds per square inch (psi). The water pressure of a typical garden hose is about 40 psi, while a gas-powered pressure washer dispenses water at between 2000 to 2800 psi (source: consumer reports). This is enough pressure to splinter wood, dent automobiles, and etch concrete. Without experience, it’s easy to cause damage that is expensive to fix.
- Working inefficiently. Most 1950’s housewives would tell you that it’s best to clean top to bottom and back to front. They would probably also tell you to soak tough stains and air dry your sheets. The same principles apply to pressure washing. However, if you aren’t accustomed to this mindset, you might not think to pre-treat grease stains until they didn’t get clean the first time.
- Not using the correct products. Speaking of pre-treating, do you know which solutions to use? Or which detergents to add to the water? Or that you need to add cleaning solutions to the water at all? If not, don’t feel bad. Most people don’t. This is where a professional can save time and money by doing the job right the first time. In addition, they know how to keep harmful chemicals out of the sewer system and out of your landscaping.
- Not using the correct equipment. There are many different types of pressure washers available for rent and for purchase. Generally speaking, electric units have a lower psi and gas units have a higher psi. Beyond that, it takes some time to research and decide which machine you need. Or you can take the word of the salesperson. All of these things take time and have a learning curve.
- Failing to take proper safety precautions. If your pressure washer can etch concrete, what do you think it will do to your Nike’s? You need the right protective equipment which includes sturdy shoes, protective eyewear, and gloves. If you are using a gas powered machine you shouldn’t operate it in an enclosed space. If you are using an electric machine you need to remember that water is an excellent conductor of electricity. In other words, if you’ve never operated a pressure washer before, there’s a lot to learn. Most of it is probably in the manual, but how much of that will you realistically read?
In this blog post we will look at the three most important reasons to seal your concrete.
The importance of concrete can’t be overstated. It is the most widely used man-made material on the planet.
A recent blog post by Bill Gates is titled, “Have You Hugged a Concrete Pillar Today?” He quotes Vaclav Smill who “argues that the most important man-made material is concrete, both in terms of the amount we produce each year and the total mass we’ve laid down. It is the foundation (literally) for the massive expansion of urban areas of the past several decades, which has been a big factor in cutting the rate of extreme poverty in half since 1990.”
What is Concrete?
According to the University of Illinois Department of Materials Science and Engineering, concrete is a composite material which is made up of a filler and a binder. The binder (cement paste) “glues” the filler together to form a synthetic conglomerate. The constituents used for the binder are cement and water, while the filler can be fine or coarse aggregate… It is important to distinguish between cement and concrete as they are not the same.”
Cement is not used on its own. When it’s mixed with fine filler you get mortar for masonry. When it’s mixed with coarse sand and gravel you get concrete. Another key piece of the equation is water. The amount of water you use determines the strength of the aggregate. “Low water to cement ratio leads to high strength but low workability. High water to cement ratio leads to low strength, but good workability.” It can be further strengthened by adding rebar – reinforcing steel bars.
Strengths and Weaknesses
Concrete is strong enough to bear the heavy load of a skyscraper without compressing. It can resist the pressure of water behind a dam. It can support thousands of cars, trucks, and busses on a bridge. There is a reason that concrete structures from the Roman Empire still exist.
Concrete can also deteriorate. In places like Wisconsin, where the temperatures drop below freezing every year, water from snow and rain can penetrate its surface. The water expands about 9% in volume as it freezes. When it melts during warmer weather it causes the material to weaken over time. Concrete also deteriorates when exposed to certain chemicals such as acids which are present in spills, or salts and alkalis which are used to treat driving surfaces in winter.
At Wahlen Works, we know concrete. We understand it’s properties and we know how to preserve it. The surface needs regular washing to remove acids, salts, and alkalis. It needs to be sealed once every five years or so. We are ready to bring our expertise to your unique property challenges and save you money over the long-term.
- The first concrete street in America was built in Bellefontaine, Ohio in 1891.
- The heaviest concrete structure in the world today is the Three Gorges Dam in China, which opened in 2003. It weighs 144,309,356,753.51 pounds.
- In 1819, the first known parking garage was built for the Hotel La Salle in Chicago.
- The Pantheon in Rome has the world’s largest unreinforced concrete dome.
- In the modern world, only water is used more than concrete.
Spring has officially arrived! One of the first things we recommend you do is go outside and take a look at your parking structures and garages. Are they gray and dusty? Is there an unpleasant accumulation of sand and salt? Have the markings on the pavement faded? Has trash been blown into the corners? If so it’s time for spring cleaning. If the debris and chemicals and sand aren’t disposed of properly, you risk damaged concrete and clogged drains.
Your concrete needs regular cleaning and preventative maintenance to prolong the life of the surface and save money on expensive repairs. But it especially needs a deep clean after one of our long midwestern winters. Located in the middle of the “Winter Facts” page on the Wisconsin DOT website is a list of some the materials they use to treat roads for snow and ice: calcium chloride, magnesium chloride, salt brine. Property owners should remove and dispose of pollutants properly for structural preservation. This maintenance also maintains an aesthetically pleasing appearance and prevents environmental damage. Engaging in prompt clean-up will also reduce the risk of injury to pedestrians who might slip on accumulated dry sand.
Spring Cleaning List
The spring cleaning list for parking structures and garages includes:
- A thorough sweeping to remove trash, sand, salt, and any leftover leaves from last fall.
- Pre-treating stains from oil spills, beverage spills, and other dirt deposits.
- Professional power washing with a high pressure nozzle to deep clean the paved surface and lift out all of the dirt.
- Re-marking of faded parking stall lines, pedestrian walkways, and directional arrows.
- Concrete sealing to protect your surfaces from water, chemicals, and traffic wear-and-tear.
Once each of the items above is checked off, it’s time to think about ongoing maintenance. Some facilities, such as hospitals, have a high volume of traffic and high turnover in the parking areas. Dirt and debris accumulate much faster than in a structure, such as an apartment, that doesn’t see as many vehicles entering and exiting. A high volume facility may require monthly sweeping while a low volume facility may only need two to three maintenance sweeps a year.
Spring Cleaning Service Package
Spring is a great time to consider a complete service package for your property. Service packages include sweeping, power washing, pavement striping, concrete sealing, and ongoing maintenance. This type of package offers the greatest value to the business owner. At Wahlen Works the cost is significantly less than if the services were purchased separately. We can create contracts for time periods between one to five years so that you can plan and budget accordingly. Longer term contracts lock in current pricing and save the headache of having to address the same issue year after year.
Don’t hire a novice. Our knowledge of equipment, processes, and chemicals will ensure that your parking facility maintains a clean, professional appearance at all times. We provide our services on your schedule so that your business isn’t disrupted and we guarantee outstanding results. Contact us today to schedule an appointment that fits with your schedule. https://www.wahlenworks.com/estimate/
If you’re a commercial property owner, a parking lot with freshly painted, clearly marked lines is almost as good as the smell of a brand new automobile. But that freshly painted look is hard to remember after a long winter of snow and snowplows, when your parking lot striping is as faded as a ten-year old car. In addition to the pleasure of a new-looking lot, your customers’ convenience and safety depend on the clarity and visibility that a professionally striped parking lot provides.
So how do you get that “new car feel” for your old parking lot?
First, you want to ask yourself a few questions. “Does the traffic flow make sense to my visitors?” “Is the space used as efficiently as it could be? Am I compliant with all applicable regulations?” “Do I have enough upright signage for stopping, yielding, and pedestrian crossing?” “Can pedestrian walkways be clearly seen?” If the answer to any of the above questions is no, it’s time to restore your parking lot to it’s original showroom look.
Fresh parking lot striping will provide you with clearly marked parking stalls and bright, durable pavement marking. This means professional quality, crisp lines measured precisely and painted to the required thickness. It includes pedestrian walking spaces, directional driving arrows, entrance and exit signs, handicapped parking spaces, loading and unloading areas, and unmistakable fire lane areas. In some instances, such as handicapped spaces and fire lanes, there must also be both marking on the pavement and on upright signs.
Whether it is brand new asphalt, freshly seal coated, or existing lines that need to be re-painted, we do it all. We have the equipment and personnel to complete the work in your off hours so we do not interrupt your operations. Restoring your parking lot to it’s original shine has never been easier.
For a complete parking lot remodel, ask about including our power washing and concrete sealing services along with your parking lot striping job. You’ll be proud of your property once again.
According to Greg Neiderer, Principal and Director of Restoration for Walker Consultants, a leading parking consultant in the United States, “Some parking facility owners and operators believe that as long as their structures continue to serve the public, few maintenance-related tasks need to be performed. Nothing could be further from the truth.” In a case study of three Pennsylvania garages, Neiderer shows that the one with the most comprehensive maintenance history had the lowest cost per space per year.
Proper parking structure maintenance reduces premature deterioration and future operating costs. An important part of this ongoing maintenance is the cleaning and washing of concrete surfaces. Concrete is a porous surface that can absorb oil and other liquids like a sponge. Chloride contamination caused by deicing salt contributes to deterioration of the concrete as well. These substances need to be removed regularly. Professional pressure washing produces a deep, uniform clean that is both cost-effective and aesthetically pleasing.
At Wahlen Works we specialize in full-service commercial pressure washing for businesses that have high standards of property maintenance and cleanliness. We accomplish this with a thorough, detailed four-step cleaning process that consistently provides superior pressure washing results.
- First, we thoroughly go over the entire facility with pre-treating chemicals which are all biodegradable. We treat oil spots, beverage stains, and other dirt deposits.
- Second, we apply phosphate free, professional grade detergents to the entire surface of the garage.
- Third, we detail every square inch with a high pressure nozzle, providing a deep clean to lift out all of the dirt. In contrast to the surface cleaning used by some other companies, this is a close application to blast all the dirt out.
- Fourth, we drain the waste water. We use polypropylene filters over the drains which pull oil from the water and prevent debris from washing into the sewage system. At the end, we pick up everything and dispose of it properly. If your property requires waste water recovery, we provide that service at this time.
When you hire Wahlen Works, you are investing in the longevity and appearance of your property. In addition to reducing overall operating costs, your facility will look better and make a better impression on visitors. Contact us today to get a quote on pressure washing services for your parking structure.