Power Washing Done Right

When it comes to giving your home’s exterior a fresh, clean look, few things are as satisfying as a good power wash. Over time, siding, decks, patios, and walkways collect layers of dirt, mildew, pollen, and grime—especially after a long New England winter and a wet spring. Power washing can bring surfaces back to life, but it’s not as simple as pointing and spraying. In fact, using the wrong pressure or technique can cause real damage.

So before you rent a machine or hire someone to tackle the job, here’s what you need to know to do it safely and effectively.

What Exactly Is Power Washing?

Power washing, sometimes called pressure washing, involves using a high-pressure stream of water to clean outdoor surfaces. Some machines use hot water (true “power washers”), while others use cold. Either way, the goal is the same: remove built-up dirt, mold, algae, and stains.

It’s commonly used on vinyl siding, wood decks, fences, concrete walkways, and driveways. Done properly, it can restore surfaces to like-new condition. But when done poorly, it can strip paint, dent siding, damage wood, or even force water behind your walls, causing moisture problems you won’t notice until later.

Why Technique Matters

The biggest mistake homeowners make with power washing is using too much pressure or holding the nozzle too close to the surface. While it might feel like you’re getting a deep clean, what you’re really doing is wearing away layers of your home.

Wood decks, in particular, are easy to damage. Softwoods like pine can splinter if blasted too hard. Vinyl siding can crack or become loose. Even concrete patios can show streaks or etching if the pressure is too high. Window seals, trim, and exterior caulking are all vulnerable to water intrusion if the spray angle is too aggressive.

The key to successful power washing is using the right amount of pressure and keeping a safe distance. Professionals typically start several feet away from the surface and gradually move closer, testing as they go. They also choose the correct spray tip for the job - wider angles for delicate surfaces, narrower ones for tough stains.

When It Works and When It Doesn’t

Power washing works well on most exterior materials - vinyl siding, concrete, brick, and certain types of wood. But it’s not ideal for everything. Asphalt roofing, older masonry with loose mortar, and painted surfaces that aren’t in great condition can be easily damaged. It’s also important to avoid spraying near electrical outlets, light fixtures, or windows.

Some surfaces benefit from using a cleaning solution before washing. Mildew and algae, common in shady areas or near trees, may require a cleaner designed for siding or decks. These help break down organic growth so that the power washer can rinse it away gently.

Know When to Call in a Pro

If your home is two stories tall, has delicate finishes, or hasn’t been cleaned in years, hiring a professional might be the safer option. A reputable company will know how to get the job done without harming your home’s exterior or landscaping. They’ll also have the right equipment for harder-to-reach areas.

Power washing can be a great way to refresh your home’s curb appeal, but it’s not a job to take lightly. With the right tools and a little know-how, you can do it yourself safely. And when in doubt, a professional can help protect your investment.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Have a question? Email info@odonnellbros.com with the subject line “Ask the Pro.” To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

Signs You Need A Roof Cleaning

Have you ever glanced up at your roof and noticed unsightly black streaks or patches of moss? It's not just about aesthetics – your roof might be trying to communicate something important about your home's health.

Dark markings on roof shingles are often signs of algae growth. Spores hitch a ride on the wind and, once they find a cozy spot on your roof with ample sunlight, warmth, and moisture, they start throwing a green party. Homes that skimp on insulation and ventilation are particularly prone to this issue, as they tend to hold onto moisture like a sponge. Before you know it, you've got a roof that resembles a botanical garden gone rogue.

Now, before you start worrying, it's essential to determine if your roof's issues are just skin-deep or if there's a deeper concern brewing. Think of it like a check-up for your home – ideally done at least once a year, preferably in late spring when nature's in full bloom. A roofing professional will meticulously inspect every nook and cranny, checking for signs of shingle deterioration, flashing cracks, and ensuring your gutters aren't staging their own mini waterfalls. Even something as seemingly trivial as debris buildup can spell trouble and potentially void your roof warranty. So, it's wise to call in the experts and let them work their magic.

Now, if your roof's stains are merely cosmetic, fear not – a roof cleaning session can work wonders. It's a relatively quick process, typically taking just a few hours, depending on the size of your roof. Plus, there's no need for aggressive pressure washing, which could harm your shingles. Instead, professionals use specialized cleaners that tackle the growth without harming your roof or the greenery below. And let's be real here – climbing onto your roof is not exactly a walk in the park. Leave this task to the pros unless you're a ladder-climbing aficionado with nerves of steel. Safety first, always.

But what if those stains are creeping into your attic space? Well, that's a red flag waving frantically in the breeze. It could mean your home's airflow is about as efficient as rush hour traffic. In such cases, it's wise to have a chat with a roofing expert about insulation and ventilation upgrades. Mold and algae setting up camp in your attic aren't just unsightly – they can also wreak havoc on your indoor air quality, which is especially concerning for vulnerable folks like the elderly or those with respiratory issues. Don't procrastinate on this – nip it in the bud before it becomes a full-blown issue.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

Mold on Vinyl Siding Shouldn’t Be Ignored

In our area of Connecticut, vinyl siding is a popular cladding option for many homeowners. Starting in the 1950s, this aluminum replacement became a favorite for its low maintenance and high durability. With a wide variety of colors and textures, it continues to be a fantastic option, offering personalized style without having to worry about sanding, painting, or major maintenance. 

While vinyl siding is beneficial in so many ways, one complaint is the potential for mold growth, often on the north side of a home. To be clear, mold can grow anywhere, but the north side is the most susceptible because it gets the least amount of sun exposure. Mold, mildew, and fungus thrive in dark, damp places, which is why the north side is generally the most vulnerable. Constant shade, high vegetation, or anything that stops a house from getting regular sunlight is an invitation for mold to grow in that area. 

In addition to lack of sunlight, excess moisture is another mold inhibitor. The cause could be as simple as trapped rainwater that’s unable to drain properly. Another possible issue could be a faulty drain pipe or a gutter that’s dripping on the siding, cause constant dampness. Either way, a moisture problem is something you’ll definitely want to deal with as the water will continue to feed the mold, which will then spread. 

Another reason for mold growth on siding is a build-up of dirt, which is actually a food source for all different types of fungus. Something as simple as a dryer vent can cause dirt and dander to stick to the siding. Tree sap is also common and can be tough to remove. Homes on high traffic roads tend to get dirty more easily as well. All of these causes quite literally make a meal for mold spores to feast on. 

So what can you do to keep mildew at bay and ensure your vinyl siding looks great for years to come? Assessing your sunlight and moisture exposure is key, but what if you don’t want to cut down a tree or you happen to live in an area where moisture is a problem? A professional will be able to inspect your siding and treat the mold using a cleaner and blocker that removes spores and keeps them from coming back. It’s important to use a specially designed cleaner that is strong enough to tackle mold but not too harsh that it will damage the house. You also want to be careful not to use any bleach containing materials so as not to harm the vegetation surrounding your home. 

Once your house is cleaned, be sure to maintain your vinyl siding by assessing your home for moisture, treating leaks promptly, and keeping your gutters clear and free of debris. An annual inspection will help to ensure that any problems are dealt with promptly so they don’t get out of control. 

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.