Top-rated deck, fence, patio or porch clean and sealers.

Get matched with top deck, fence, patio or porch clean and sealers in Knoxville, MD

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Deck, fence, patio or porch clean and sealers in Knoxville

Avatar for Deck Buddy, LLC
Deck Buddy, LLC
4.5(
29
)

Serving Knoxville, MD and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"I highly recommend Deck Buddy. Our screened porch (inside and out), deck and stairs were badly in need of cleaning and resealing. We had 4 different companies out here to quote the job. Deck Buddy was by *far* the most professional of the bunch, extremely competent and moreover pleasant to work with. They came exactly on time and were able to answer all my questions and were extremely knowledgeable about the work and the products/services they would use/perform. Their bid was neither the highest nor the lowest. Their service tech spent 3 days here cleaning, repairing, and refinishing our porch and deck. It looks like new. I am so pleased. We have attempted to do this work ourselves in the past, and paid to have it done by a different company once before, but never achieved the results Deck Buddy did. I should add, that when we paid to have this work done before, it did not seem like the other company applied very much product to the wood. This time, with Deck Buddy, you can see the wood is thoroughly sealed. Also, in comparison to our earlier experience, Deck Buddy took care to cover all my plants and also the house siding to protect from overspray. (Not protecting my plants was a problem with a different powerwashing company we hired once - my hostas were shredded - you have to watch out for this). Deck Buddy was extremely careful with everything and left no mess or debris behind, the porch and deck look great, the garden is unscathed. It was a job well done. Thank you!!!!"
Restoration
Restoration
Gazebo and Deck Restoration
Full Deck Re-Surfacing and Staining
Two Tone Restoration

+111

Response time10 mins
Recommended by91%of homeowners
Avatar for BLUE DIAMOND CONTRACTORS LLC
BLUE DIAMOND CONTRACTORS LLC
5.0(
9
)

Serving Knoxville, MD and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"Josh Ramirez from white diamond Construction he built me a beautiful tack room in my barn and in my house he redid my kitchen floors looks beautiful he did a awesome job would recommend him again to anybody was done in a timely manner and a good price"
Project Photo
6 neighbors recently requested a quote
Avatar for M.C. Fence and Deck
M.C. Fence and Deck
4.6(
442
)

Serving Knoxville, MD and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"The work was exceptional--The new fence was a work of art! This is a throw back company to the old days when Honesty, Quality and Customer Satisfaction meant something! John F the sales and point person for the project, Zack the production manager and the three installers did an outstanding job of communicating in all phases of the project. A special shout out to John F who came over to my house on a Sunday to accommodate some special needs! I would highly recommend hiring MC fence for all your fence and deck needs---The staff always went the extra mile to keep me happy....MC fence is a top flight company to do business!"
Privacy wood fence in northern VA
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+33

Recommended by94%of homeowners
Avatar for Tony's Power Washing and Window Cleaning
Tony's Power Washing and Window Cleaning
4.8(
57
)

Serving Knoxville, MD and surrounding areas

In business since 2014

Free estimates

Warranties offered

"Tony power washed and stained the deck and fences as required. He did the work over a 2 weekend period to adjust to changing spring weather conditions which weren't favorable for staining. Tony is a very reliable contractor and I would use his services again for future deck and fence painting."
Siding soft wash
Siding washing
Siding washing
Additional Photos
Additional Photos

+22

Response time10 hrs
Recommended by100%of homeowners
Avatar for Mel's Power Washing & Window Cleaning Inc
Mel's Power Washing & Window Cleaning Inc
4.4(
1,971
)

Serving Knoxville, MD and surrounding areas

In business since 2004

Free estimates

Credit card accepted

"Not only are the people nice, Mel and everyone who worked on the project did a great job. My wood deck needed cleaned, wood replaced, and stained. I am extremely happy with the results, and I would recommend this company highly."
Window cleaning
Interior paint project.
Working on a 60 ft. Ladder
Interior paint project.
Interior paint project.

+19

Recommended by86%of homeowners
Avatar for No More Dirty Roofs
No More Dirty Roofs
4.6(
608
)

Serving Knoxville, MD and surrounding areas

In business since 1995

Free estimates

Credit card accepted

"Punctual, job well done, Able to remove fair amount of moss growing on garage roof with no damage to roof. Able to assess condition of all the roofs. Able to clean very soiled canvas awning—now looks like new! Would definitely hire 2MacsPowerWashing LLC (Justin McKenzi) again."
Recommended by92%of homeowners
Avatar for All Pro Exteriors
All Pro Exteriors
4.6(
62
)

Serving Knoxville, MD and surrounding areas

In business since 1991

Emergency services offered

"Vince called me back within hours of my sending him a message through Angie's List.  Even though he does not list Montgomery County as one of his service areas, he was completely willing to help us out.  In my message, I had requested the work to be done onsite but Vince explained why having him pick up the generator and take it back to his shop to work on it would make more sense.  His charge for pick-up and delivery back to us was only $34.95.
When Vince came to pick up the generator, he was on time and was able to give me a ballpark cost for the work (which turned out to be very accurate).  He said that he could get it back to us in 3-4 days but I asked if he could do it faster as there was a snow storm predicted for the next day or so.  Vince agreed to a shorter time line and ultimately got the generator back to us within 1 day!  There ended up being no snow storm but we got our generator back in working condition - along with a booklet of care instructions, a copy of our invoice, and a service history form.  A few days later we received a hand-written Thank You card in appreciation of our business.  I can't imagine how the service could have been any better.  We will use Vince for any future small engine repairs/maintenance we have and highly recommend him and his services.
"
Recommended by94%of homeowners
Avatar for Blue Sky Home Services
Blue Sky Home Services
5.0(
65
)

Serving Knoxville, MD and surrounding areas

In business since 2018

Free estimates

Credit card accepted

"Great! Roland and his crew did a quick and thorough job of a significant remodel of our master bathroom and updates to two other bathrooms to get our house ready to be listed for sale. Blue Sky was great to work wit."
Rockville Kitchen Remodel
Rockville Kitchen Remodel
Rockville Kitchen Remodel
Rockville Kitchen Remodel
Rockville Kitchen Remodel

+63

Recommended by100%of homeowners
Avatar for RJ Construction Inc
RJ Construction Inc
4.6(
45
)

Serving Knoxville, MD and surrounding areas

In business since 1987

Free estimates

Credit card accepted

"RJ Construction made significant repairs to our 30 year old cedar deck, stairs and screened porch. The old wood was replaced by Trex; a modern railing and screen system were installed; and the porch posts wrapped in a white pvc trim. The result is an outstanding modern looking porch/deck. Working with Robert was easy from beginning to end. He understood what we wanted, gave us good ideas and was timely in all communications with us. His team was also excellent in both the construction phase and in cleaning up the significant amount of wood and nails from the demolition of the old decking."
Additional Photos
Upper deck, Lower deck and gazebo
Additional Photos
Additional Photos
Additional Photos

+46

Recommended by100%of homeowners
...
Showing 1-10 of 94
FAQs for deck, fence, patio or porch clean and seal projects in Knoxville, MD

You should clean your deck before sealing it. Cleaning before refinishing is critical. If you don’t remove dirt and debris, you'll trap moisture in the wood, which prevents the new sealer from working correctly and can lead to costly repairs. Whether you need to sand, power wash, or sandblast depends on your deck's condition.

Sealing and staining your deck are essential maintenance methods that protect and beautify your outdoor space. Stain adds rich color and guards against fading, while sealant fortifies the wood against moisture and weather damage. Wood type, climate, deck age, and the degree of existing damage determine whether your deck benefits from one or both treatments. Using both options extends your deck’s durability and enhances its overall appearance.

Power washing and sealing your deck costs $500 to $1,700. This process combines the removal of stubborn dirt and debris with a protective seal that preserves the wood’s integrity. Effective cleaning eliminates harmful buildup, and a proper seal prevents moisture damage and wood decay, ensuring long-term durability and reducing future repair expenses.

Your deck must be sealed every one to three years to maintain its strength and appearance. Regular sealing is essential to protect the wood against moisture, mold, and harmful UV rays. A consistent sealing schedule prevents rapid deterioration and costly repairs. Inspections should be performed annually to determine if the protective layer remains intact, extending the life of your deck.

Leaving your deck untreated compromises its structural integrity and safety. An unprotected deck rots quickly due to moisture and environmental exposure, which means that neglecting sealing results in rapid decay and expensive replacement costs of $4,125 to $11,650. Sealing your deck is essential for maintaining its durability and protecting your home.

The sealant on your deck dries within a few hours and reaches full cure within 72 hours before regular use. It is essential to wait until the complete curing period to ensure the protective layer fully sets and resists weather and foot traffic. Proper drying guarantees that your deck is fully protected against moisture and environmental damage, ensuring lasting quality.

The Knoxville, MD homeowners’ guide to deck, fence, patio or porch clean and seals

From average costs to expert advice, get all the answers you need to get your job done.