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.

Avoid These Outdoor Projects in the Winter

Lots of folks think winter is a great time for outdoor upgrades. It feels like a good plan after the holiday hustle and before the contractors get super busy with the warmer weather. But, truth be told, it's not the safest time for big exterior projects like roofing and siding. Here's why:

• When the weather is below 40 degrees, the composition of building materials really changes. As it gets colder, products such as shingles can get brittle and crack or split easily. Materials such as vinyl siding shrink, which can lead to misalignment or potential for leaks when they later expand as the weather warms.

• Another big issue is shingle adherence. Shingle sealant is activated by sun and heat. If there is not enough of either, the hold won’t be as strong as it should be, which could cause problems down the road. If the weather is too cold, we are often forced to hand seal, which can add time and cost to a generally simple process.

• Most contractors use an air nail gun for external remodeling, which works by pressure. If humidity turns to ice in the airline, it can under or overdrive the nails instead of putting them in flush. Compressors face the same potential problem. 

• Being on a roof or ladder in winter is dangerous. Even the most seasoned professionals must take care as black ice can cause serious injury. While we take every precaution, there is a lot that can go wrong during cold conditions. It’s often not worth the risk. 

• Winter weather is unpredictable. When it rains in the warmer months, we tarp a job thoroughly to ensure there aren’t any leaks. Snow is more difficult as it adds both moisture and weight to a job. Imagine having a roof open in February and a foot of snow falls from the sky?

• A cold weather installation could void your warranty. Many products specify a proper installation environment, which is usually above 40 degrees. 

• Winter jobs almost always take longer as roofers need to take extra precautions and more frequent breaks while working in cold conditions. The last thing you want is someone on a roof who can’t feel their toes. There is also less daylight, which will add time to an installation.

Sometimes, a winter repair or replacement is inevitable and leaving the job until spring might make things worse. If this is the case for you, be sure that you’re working with an experienced contractor who has a solid track record in winter conditions and discuss all the precautions and extra steps that will be taken to ensure the job is done correctly. The last thing you want is someone getting injured or a situation where corners have to be cut to accommodate less-than-fair conditions. In the end, is it really worth it? 

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.

Outdoor Work in Winter That's a No Go

It may seem surprising but I get a lot of calls from homeowners who want to put on a new roof or update their vinyl siding during this quieter time of the year. People often think winter is a good opportunity to make outdoor improvements since it’s past the holiday period and before the busy spring sets in. As much as I hate to disappoint, now is actually a pretty dangerous time of year to do any exterior projects. Here are seven reasons why:

1. When the weather is below 40 degrees, the composition of building materials can really change. As it gets colder, products such as shingles can get brittle and crack or split easily. Materials such as vinyl siding shrink, which can lead to misalignment or potential for leaks when they later expand as the weather warms.

2. Another big issue is shingle adherence. Shingle sealant is activated by sun and heat. If there is not enough of either, the hold won’t be as strong as it should be, which could cause problems down the road. If the weather is too cold, we are often forced to hand seal, which can add time and cost to a generally simple process.

3. Most contractors use an air nail gun for external remodeling, which works by pressure. If humidity turns to ice in the airline, it can under or overdrive the nails instead of putting them in flush. Compressors face the same potential problem. 

4. Being on a roof or ladder in winter is dangerous. Even the most seasoned professionals must take care as black ice can cause serious injury. While we take every precaution, there is a lot that can go wrong during cold conditions. It’s often not worth the risk. 

5. Winter weather is unpredictable. When it rains in the warmer months, we tarp a job thoroughly to ensure there aren’t any leaks. Snow is more difficult as it adds both moisture and weight to a job. Imagine having a roof open in February and a foot of snow falls from the sky?

6. A cold weather installation could void your warranty. Many products specify a proper installation environment, which is usually above 40 degrees. 

7. Winter jobs almost always take longer as roofers need to take extra precautions and more frequent breaks while working in cold conditions. The last thing you want is someone on a roof who can’t feel their toes. There is also less daylight, which will add time to an installation.

Sometimes, a winter repair or replacement is inevitable and leaving the job until spring might make things worse. If this is the case for you, be sure that you’re working with an experienced contractor who has a solid track record in winter conditions and discuss all the precautions and extra steps that will be taken to ensure the job is done correctly. The last thing you want is someone getting injured or a situation where corners have to be cut to accommodate less-than-fair conditions. In the end, is it really worth it? 

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.