Can I build a deck over my HVAC unit?

• <div><p>Yes, you can build a deck over your outdoor HVAC unit, but you need to leave at least 5 feet of vertical clearance above the unit. If you don’t want your deck to be that high off the ground, you could <a href="https://www.angi.com/articles/how-to-build-floating-deck.htm">build a floating deck</a> in another part of your yard—again, as long as you leave at least 4 feet of horizontal space between the deck and your AC unit.</p></div>

Top 10 Best Deck maintenance specialists in Cornell, WI

Q: What’s the difference between a deck and a terrace?

• <div><p>A deck is typically attached to a house and accessed via the back door. Decks are usually constructed from wood or composite materials. A terrace, on the other hand, is a raised platform that can be attached to or detached from the house and is typically made from a hard-paved material, such as paving stones. Terraces can be built on the ground or on the roof of a home. </p></div>

Q: What’s the difference between pressure-treated decking and other decking types?

• <div><p>Pressure-treated wood contains preservatives that give the material internal protection from rot and pests. Untreated lumber won&rsquo;t last more than a few years unless you choose a more expensive wood, like cedar, that naturally stands up well to moisture. Composite decking can outlast wood but is more expensive and doesn&rsquo;t look as natural. Keep in mind that you&rsquo;ll need to seal any exterior wood product to protect it from the elements and other forms of external damage.</p></div>

Q: Why does my deck pop in extreme cold?

• <div><p>Cold temperatures can make your deck boards contract. If they don&rsquo;t contract evenly, they can put pressure on the deck screws and cause them to pop out, making a noticeable sound. Winterizing your deck can help prevent this from happening. </p></div>

Q: Do I need to seal the underside of a deck?

• <div><p>Staining and sealing the underside of a deck creates a moisture barrier but traps water in the boards, quickly leading to rot. No matter how well you seal the above deck, water still gets through via nails and screw heads on the surface. Allow this water to flow naturally under the deck, where it is routed through the drainage system.</p></div>

Get matched with top deck maintenance specialists in Cornell, WI

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Verified Reviews for Deck Maintenance pros in Cornell, WI

*The Angi rating for Deck Maintenance companies in Cornell, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Deck Maintenance needs.

*The HomeAdvisor rating for Deck Maintenance companies in Cornell, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Deck Maintenance needs.

Last update on January 27, 2026

Reviewed in January 2026
Matt was easy to work with. Unfortunately, they got a late start waiting for materials so they had to work through some snow and cold. I haven’t really got a good look at the deck because it’s been snow covered but what I saw looked good I’ll know more in the spring although based on my...
5 Star Construction LLC
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Reviewed in July 2025
Dan and Lyle worked hard to get my deck stairs done before the 4th. They were very careful and did a terrific job. Would highly recommend.
Renegade Construction, LLC
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Reviewed in September 2024
Was a pleasure having Josh and his crew doing are decks they did a fabulous job very dependable an pleasant to be around an got project done in a timely manner look forward to working with them in the future.
Been Doin' It Construction LLC
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Reviewed in August 2020
Their craftsmanship is outstanding. Great finish work. We are so proud to show off our new deck. Thank you all for your excellent work!
JW Construction
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Reviewed in April 2020
I cannot say enough wonderful things about Josh but I'll try! Incredibly kind, respectful, on-time and provided excellent service and professional recommendations. He listened to me - addressed all my needs and concerns - and got the job done promptly and was VERY reasonably priced! I was very...
Proper Property Maintenance
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Reviewed in November 2016
John and his son Joe were there within a few days to do the work for me. They listened to what I wanted and had the job done in one day. I am extremely satisfied with their work. The deck looks nice and I am happy with it.
Merritt Construction
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Reviewed in July 2014
Because my husband was away from home during Spring one year, I hired A Perfect Lawn to do a "spring clean-up" for me. I have a very large yard with numerous large flower gardens & it's all on a hill! They cleaned up all the leaves from the many oak trees on my property along with removing all...
A Perfect Lawn
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Reviewed in May 2014
It went very well, Heath has his own trailer on job site with all the tools he needs to do the job correctly. Arived on time and went right to work. honest! plus completed job in a timely manner. Price is negotiated up front and there were no surprises. very nice person to have around. since...
Happy Home Improvement & Handyman Service
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Reviewed in April 2013
<p>From the first time I met the owner of Blue Hills Roofing, Mr. Stephen Falstad, I had a good instinct that I may choose him. Sounds absurd, but of all 13 contractors I met with, Mr. Falstad was the only one who took the time to go in-depth and explain how a proper roofing system works. From...
Blue Hills Roofing & Construction LLC
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Reviewed in November 2011
They were great. They did a maintenance check on a crack and a block. They let us know immediately and scheduled. They also let us know what the options were. It was an old enough furnace that needed to be replaced. We trusted their opinion. I knew that we had a little bit of warranty left...
Hovland's Inc
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Find Deck maintenance specialists in Cornell

Nelson Home Repair LLC

4.8(

)

Serving Cornell, WI and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"We would recommend Mr. Nelson to complete repair to anyone. Great job."

Response time3 hrs

Response rate93%

Recommended by64%of homeowners

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Clear View Exterior Care LLC

5.0(

)

Serving Cornell, WI and surrounding areas

Approved

In business since 2023

Free estimates

Small jobs welcome

"Aidan did an excellent job cleaning our siding, will definitely be calling him back for future work!"

Response time12 hrs

Response rate97%

11 neighbors recently requested a quote

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Tripp's Handyman Service

5.0(

)

Serving Cornell, WI and surrounding areas

In business since 2004

Free estimates

Credit card accepted

"He was wonderful! We had some broken stair treads going down to our basement. He replaced all of the stairs and stained them for us. It was a more than fair price and the work was done within schedule. I love that he was punctual and communicative! 10/10 would hire again."

Response time4 hrs

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Renew Crew of Northwest Wisconsin

4.7(

)

Serving Cornell, WI and surrounding areas

"he did pretty good for a cratched up deck to work with i would probably not try the method we used which involved staining would probably go with painting and maybe have the work done by same person . ."

Recommended by100%of homeowners

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Property Restoration Management

4.5(

)

Serving Cornell, WI and surrounding areas

In business since 2011

Free estimates

"Mark was excellent. Quality work at more than reasonable prices. Recommended changes to my original design and incorporated them at no additional cost. Great company to deal with!!"

Response time1 day

Recommended by90%of homeowners

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Crystal Clear Window Cleaning

4.6(

)

Serving Cornell, WI and surrounding areas

In business since 2005

Free estimates

"They were good and they did a great job."

Recommended by83%of homeowners

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R&R Landscaping & Lawn Care LLC - Home Facebook

4.6(

)

Serving Cornell, WI and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"Showed up on the scheduled day removed the stacked up brush and even cut some larger branches into sections for my fire pit."

Response time1 day

Recommended by100%of homeowners

Serving Cornell, WI and surrounding areas

In business since 2003

Free estimates

Warranties offered

"My professional window installers were prompt, courteous, friendly and most importantly knowledgeable. They were able to answer my concerns and questions before during and after installation. The rooms were left clean and orderly. The yard and carport where the windows were stored after delivery by Lowe's was spotless, the old windows, trash and debris were gone! Very impressed! When we signed the paperwork for an installer we didn't know we were getting an entire company with Severson, Inc. Thank You Denise Capps"

Recommended by100%of homeowners

Serving Cornell, WI and surrounding areas

In business since 2007

Free estimates

Warranties offered

"Dean was quick to get back to me with a quote. He finished up the job in a timely manner, and it was very professionally done. Dean is an excellent person to work with..."

Recommended by100%of homeowners

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Eifflers Construction

5.0(

)

Serving Cornell, WI and surrounding areas

In business since 2021

Free estimates

Emergency services offered

Eifflers Constructionis committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time6 hrs

Recommended by100%of homeowners

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Showing 1-10 of 25

Deck Maintenance questions, answered by experts

A deck is typically attached to a house and accessed via the back door. Decks are usually constructed from wood or composite materials. A terrace, on the other hand, is a raised platform that can be attached to or detached from the house and is typically made from a hard-paved material, such as paving stones. Terraces can be built on the ground or on the roof of a home.

Pressure-treated wood contains preservatives that give the material internal protection from rot and pests. Untreated lumber won’t last more than a few years unless you choose a more expensive wood, like cedar, that naturally stands up well to moisture. Composite decking can outlast wood but is more expensive and doesn’t look as natural. Keep in mind that you’ll need to seal any exterior wood product to protect it from the elements and other forms of external damage.

Yes, you can build a deck over your outdoor HVAC unit, but you need to leave at least 5 feet of vertical clearance above the unit. If you don’t want your deck to be that high off the ground, you could build a floating deck in another part of your yard—again, as long as you leave at least 4 feet of horizontal space between the deck and your AC unit.

Cold temperatures can make your deck boards contract. If they don’t contract evenly, they can put pressure on the deck screws and cause them to pop out, making a noticeable sound. Winterizing your deck can help prevent this from happening.

Staining and sealing the underside of a deck creates a moisture barrier but traps water in the boards, quickly leading to rot. No matter how well you seal the above deck, water still gets through via nails and screw heads on the surface. Allow this water to flow naturally under the deck, where it is routed through the drainage system.

The Cornell, WI homeowners’ guide to deck maintenance services

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

See all articles

Mitchell Grant
•
May 2, 2026May 2, 2026
How Much Does a Pressure-Treated Wood Deck Cost? [2026 Data]
Looking to update your yard with a new outdoor entertaining area? Learn how much a pressure-treated wood deck costs and how to estimate your total.
Angi
•
Apr 16, 2026Apr 16, 2026
How Much Does Mahogany Decking Cost? [2026 Data]
Discover mahogany decking costs and learn about material, labor, and installation factors to budget your new deck project with confidence.
Scott Dylan Westerlund
•
May 30, 2026May 30, 2026
Cost to Seal or Waterproof a Deck [2026 Data]
Sealing a deck is important for protecting it against the elements. Find out the cost to seal a deck, whether you DIY or hire a pro to do the job.
Jenna Jonaitis
•
Apr 5, 2026Apr 5, 2026
Top Deck Maintenance Tips for Every Decking Material
Deck maintenance is vital to protecting a wooden deck. Cleaning, staining and sealing a deck after pressure washing will add years to its lifespan. Protect a deck by following these deck maintenance tips for cedar and other types of wood materials.
Lawrence Bonk
•
Mar 19, 2026Mar 19, 2026
Deck Maintenance Checklists for Every Season
Keep your decking looking new with this deck maintenance checklist.
Deirdre Sullivan
•
Apr 9, 2026Apr 9, 2026
7 Best Maintenance-Free Decking Materials
Finding maintenance-free decking that works for your home, budget, and lifestyle can be challenging. This guide lists the 7 best low-maintenance deck materials.