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.

Don’t Let Your Home Get Drafty This Winter

If your house has old doors, winter can be a drafty time of year. Luckily, there is an easy, do-it-yourself fix to help you keep the cold air out and the warm air in where it belongs. Here is my guide to sealing your doors before the real cold sets in.

Examine your current weatherstripping for any rips, bends or wear and tear. In older doors, the seals usually deteriorate before the doors themselves, which will allow air to pass through. If you can feel a draft coming from the edges around a closed door, it’s time to give them a little facelift. However, if the door is damaged, sagging, or rattling, it might be time for a new one entirely.

Measure the top and sides of your door jambs with precision; you want the fit to be snug and airtight. I always say, measure twice and buy once! Once you measure the doors, you’ll find the materials that you need either at the local hardware store or online on any home improvement retail site. In addition to weather stripping, you might also need a sweep, which is the strip along the bottom of the door that looks like a tiny broom and keeps the gap between the door and the floor sealed. If yours is damaged or has broken off in parts, now is a good time to replace it. Luckily, basic individual weatherstrips and sweeps can cost as little as $10 each, which is a lot less than investing in a new door.

Just like painting, when you start weatherproofing you’ll need to begin on a clean surface. Scrape any old debris so the gap is free and clear. You want to make sure your gap is in good shape to lay the strips evenly and you need to have enough room for the strips to grip properly.

Finally, you can install your new weatherstripping. Cut it to size before you put it in the groove and ensure that you don’t stretch the material to fit – it will return to its original size and leave you short. Secure it firmly into the groove and open and close the door to look for any protrusions or gaps.

Weatherstripping is a quick, inexpensive fix that will help you stay warmer in the winter and give your heating bill a noticeable break. But just like any home improvement tasks, if you’re not comfortable using basic tools and equipment, you might want to leave the job to a professional. Either way, keep your family warm this winter and take some time for yourself to enjoy the holiday season.

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 www.odonnellbros.com. Advice is for guidance only.