A well-maintained deck is a valuable extension of your home, providing the perfect place for outdoor relaxation and entertainment. However, wear and tear from weather, usage, and natural aging can cause issues with your deck over time. So, how do you know when to fix something yourself and when to hire a professional for deck repairs? 

Having the knowledge and ability to recognize and repair common deck problems can save you time and money and ensure your deck remains a safe space you can use. While regular deck inspections can help you catch potential problems early, it's crucial to recognize not all deck repairs are equal. You need to know which repairs you can tackle yourself and what repairs require the expertise of a professional deck contractor.

In this blog, we'll walk you through different deck repairs to watch out for and help you distinguish between DIY fixes and those requiring expert intervention.

1. Cracked or Split Deck Boards

Cracked and split deck boards are common issues in older wooden decks. Weather conditions, such as extreme heat, cold, and moisture from rain and snow, can cause wood to expand and contract. This constant cycle of expansion and contraction weakens the wood fibers over time, resulting in cracks and splits. Exposure to UV rays from the sun further accelerates this degradation, drying out the wood and causing it to become brittle.

How to Fix It:

• For Small Cracks: These can often be repaired using wood filler or epoxy. After filling the crack, sand the area down to create a smooth surface. Then, apply a protective sealant to prevent future damage.
• For Larger Cracks or Multiple Damaged Boards: It's better to replace the damaged board entirely. This is important if the cracks have worsened over time or if moisture has penetrated deep into the wood, which could lead to more significant damage later on.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• If you notice cracks in multiple boards, it could mark a more serious issue with the overall condition of the deck, such as aging materials, poor installation, or insufficient drainage. A deck contractor can assess whether repairs are sufficient or if you need deck replacement. 

2. Warped or Buckling Deck Boards

Warped or buckling deck boards are usually the result of moisture exposure, poor ventilation, or improper installation. When deck boards absorb excessive water from rain or humidity and then dry out under the sun, this repetitive cycle can cause the boards to warp, twist, or even buckle.

How to Fix It:

• For Minor Warping: If a board is only slightly warped, it can be screwed back into place. Remove the old screws or nails, and use new, proper-sized screws to secure the board back to the joists.
• For Severe Warping: Severely warped or buckled boards must be replaced entirely. Measure the warped board and replace it with a new one made from the same or more durable material. Seal and treat the new board to prevent future warping.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• If multiple boards are warping or buckling, this could indicate an underlying structural issue such as improper drainage, poor ventilation, or even foundation movement. A deck contractor can assess whether the problem lies solely in the boards or if deeper structural repairs are required.

3. Discoloration or Fading of Deck Floor

Discoloration and fading of your deck’s floor are common issues caused by prolonged exposure to sunlight, rain, changes in temperature, and other weather conditions. Over time, UV rays break down the pigments in wood, leading to a bleached or faded appearance.

How to Fix It:

• For Fading: Begin by cleaning the deck thoroughly using a deck cleaner or power washer. Once cleaned and dried, sand the deck’s surface and apply a high-quality deck stain that contains UV protection. Follow up with a waterproof sealant.
• For Discoloration or Staining: Stains from water, leaves, or other sources can often be cleaned with a wood cleaner or mild bleach solution. Scrub the affected areas with a brush to lift the stains, then apply a deck brightener before staining and sealing.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• If the discoloration is accompanied by other signs of damage, such as mould, rot, or warping, a professional deck contractor should assess the deck. They can determine whether the fading is purely cosmetic or a symptom of deeper structural issues.

4. Loose Nails, Screws, Bolts, or Fasteners

Loose nails, screws, bolts, or other fasteners can compromise the safety and stability of your deck. Over time, changes in temperature and moisture levels cause the wood to expand and contract, which can loosen fasteners.

How to Fix It:

• Tighten or Replace Fasteners: For nails or screws that have become loose, simply hammer them back in or tighten them. For a more durable solution, replace them with deck screws.
• Upgrade to Rust-Resistant Fasteners: Replace rusted or corroded fasteners with stainless steel or galvanized screws or bolts.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• If you notice multiple fasteners loosening across the deck or if tightening them doesn’t resolve the issue, it may indicate a larger structural problem. A deck contractor can assess the overall stability of the deck and check for signs of joist or beam damage, improper installation, or shifting foundations.

5. Rotten Deck Posts and Boards

Rot occurs when moisture gets trapped in the wood, allowing fungi to thrive and slowly break down the fibers. Over time, this weakens the wood, making it soft, spongy, and prone to crumbling.

How to Fix It:

• Replace Rotten Wood: For minor rot, remove the affected area and replace it with treated wood. Ensure the new wood is sealed and treated to prevent future rot.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• For Extensive Rot: If rot is widespread, it may be necessary to replace entire sections of the deck. Rot is a serious issue that compromises the structural integrity of your deck. A professional deck contractor can assess the extent of the damage and recommend the best course of action, whether it's replacing individual boards or sections or rebuilding your deck.

6. Unstable Railings and Deck Stairs

Unstable railings and deck stairs are critical safety hazards that need immediate attention. Railings prevent falls, while stable stairs ensure easy and safe deck access. Over time, exposure to weather, moisture, and general wear can cause railings and stairs to become loose or unstable. This is often due to wood deterioration, shifting deck posts, or loose fasteners.

How to Fix It:

• Tighten Loose Fasteners: Check for loose screws, bolts, or nails in the railings and stairs. Tighten any loose fasteners or replace them with longer, more secure fasteners like deck screws. 
• Replace Damaged Components: If you find cracked posts, loose balusters, or warped steps, replace these components immediately. Ensure the replacements are properly secured and treated to resist wear and moisture. 
• Reinforce the Structure: If tightening or replacing fasteners doesn't solve the problem, add additional bracing or supports underneath the stairs, or secure rail posts more firmly to the deck's frame.
  
  

When to Hire a PROFESSIONAL FOR DECK REPAIRS: 

• If the railings or stairs remain unstable after your attempts to fix them, it's best to consult a professional deck contractor. They can assess underlying structural issues, such as improperly anchored posts or shifting footings, and ensure repairs comply with local building codes.

7. Pest Infestation and Damage

Pests like termites and carpenter ants can severely weaken your deck's structure by feeding on the wood, creating tunnels and hollow spaces. If left untreated, an infestation can result in unstable surfaces and structural components. Pests are particularly drawn to untreated or damp wood.

How to Fix It:

• Identify and Remove Affected Wood: Inspect your deck for damaged or hollow wood, especially in damp areas or those in contact with the ground. Remove and replace any significantly damaged wood, ensuring proper disposal to prevent the pests from spreading.
• Treat the Deck with Pesticide or Wood Treatment: After removing the affected wood, treat the remaining structure with a pesticide or wood treatment designed for wood-destroying insects. Consider using a preservative or sealant to make the wood less attractive to pests.
• Reinforce Vulnerable Areas: Replace components frequently exposed to moisture with pressure-treated lumber, composite materials, or metal posts. These materials are more resistant to both moisture and pests.
  
  

When to HIRE A PROFESSIONAL FOR DECK REPAIRS: 

• If the infestation has spread extensively, compromising key structural components like posts, beams, or joists, hire a professional. They may recommend replacing significant portions of the deck or reinforcing the foundation.

8. Erosion or Damage of Footings and Posts

Erosion around deck footings or posts can lead to significant structural issues, causing the deck to sink, shift, or become unstable. Erosion typically occurs due to poor drainage, heavy rainfall, or water runoff.

How to Fix It:

• Backfill and Compact the Soil: For minor erosion, backfill the area with soil and tamp it down to restore support. Adding gravel or rocks around the base of the posts can also improve drainage.
• Install New Footings or Reinforce Existing Ones: For severe erosion, new footings or reinforcement with additional concrete may be necessary. Helical piers or concrete anchors can provide better long-term stability.
• Improve Drainage: Address any drainage issues by installing gutters, French drains, or grading the landscape around the deck to divert water away from the footings and posts.
  
  

When to hire a professional FOR DECK REPAIRS: 

• If erosion has caused significant movement in the deck, it’s best to hire a professional deck contractor. They can assess the extent of the erosion, determine necessary repairs, and advise on long-term solutions.

9. Mould and Mildew Growth

Mould and mildew growth are common on decks, especially in moist damp and shaded areas where moisture can accumulate. Signs of mould on your deck surface include black and green slippery areas and a musty order. Over time, mould and mildew accelerate the decay of wood, leading to weakened structural integrity over time.

How to Fix It:

• Clean the Affected Area: Start by cleaning the mildew or mould with a specialized deck cleaner that contains mildew fighting properties. Use a bristle brush to clean away the growth thoroughly. Powerwash the area to further remove any residual mould and debris on a gentle setting. 
• Inspect for Water Damage: Inspect your deck for any signs of water damage. If there is extensive damage, you may need to replace boards or other deck components.
  
  

When to HIRE A PROFESSIONAL FOR DECK REPAIRS: 

• If mould or mildew growth is extensive or you notice excessive water damage, hire a deck contractor to assess the damage, determine what parts of your deck need to be replaced, and recommend further treatments to mitigate mould and mildew growth.

10. Faulty Floor Joists

Floor joists are key parts of your deck's structure, helping to support the entire surface. These horizontal beams hold up the deck, furniture, and people walking on it. If the joists get damaged from age, water, or pests, it can cause safety issues like sagging or instability. Signs of faulty joists include a sagging deck, creaking noises when you walk on it, or visible cracks in the beams. Fixing these problems quickly is important to keep your deck safe and sturdy.

How to Fix It:

• Reinforce Small Damage: If only one or two joists are slightly damaged, you can strengthen them by adding extra wood. This might involve placing support between the joists or attaching new lumber to the old ones. Be sure any repairs follow local safety rules.
• Check for Water and Pest Damage: Inspect the joists for signs of water damage or pests like termites. If you find serious damage, address the root cause first—like improving drainage or treating pests—before fixing the joists.
  
  

When to hire a PRofesSIONAL for Deck REPAirs: 

• If several joists are damaged, it's best to hire a deck contractor. Replacing multiple joists is a complex job that requires expertise. A contractor can recommend the best solution, such as replacing damaged joists with pressure-treated wood or more durable materials like metal.

11. Cracked Concrete Piers

Concrete piers are important for holding up your deck and keeping it level. They distribute the weight of the deck evenly across the ground. Over time, moisture, freezing and thawing, and settling can cause cracks in the concrete, which can weaken the support.

Signs of Cracked Piers: If you see cracks or shifts in your deck, it’s important to fix these problems quickly, as they can make your deck unstable and unsafe.

How to Fix It:

• Evaluate the Damage: Check the concrete piers for cracks and assess how serious they are. Small hairline cracks might not be urgent, but larger cracks need immediate attention.
• Sealing Minor Cracks: For small cracks, you can use a concrete filler to seal them. This will help keep water out and prevent further damage. Make sure the area is clean and dry before applying the filler.
  
  

When to Hire A Professional for Deck Repairs: 

• If you think your piers are compromised, it’s wise to consult a deck contractor. They can decide whether the piers can be repaired or need to be replaced and assess the surrounding soil and drainage. After repairs, ensure proper drainage away from the piers to reduce water exposure and erosion. Regularly inspect the piers to catch any new issues early.

12. Busted Bracing

Bracing is an important part of your deck that provides stability and helps it resist forces from high winds and storms. These diagonal supports keep the deck from swaying or collapsing. Over time, weather, wear and tear, or poor installation can cause braces to break or go missing, which can compromise the deck's safety.

How to Fix It:

• Immediate Replacement: If you find any broken or missing braces, replace them right away. This is essential for restoring the stability of your deck. Use materials suited for outdoor use, like treated lumber or metal brackets.
• Reinforcement: After replacing damaged braces, consider adding extra braces in areas that may experience stress, especially in high-wind locations.
  
  

When to HIRE a Professional for Deck RePairs: 

• If your deck still sways after making repairs, contact a deck contractor. They can thoroughly assess your deck's structure and identify any underlying issues that need to be fixed.

13. Bad Beams

Beams are essential for your deck's structure, supporting the weight of the surface, furniture, and foot traffic. If beams become cracked, sagging, or damaged, it can compromise the safety and stability of your deck. Signs of bad beams include visible cracks, sagging, or shifting. If you notice these issues, it's crucial to address them immediately.

How to Fix It:

• Assess the Damage: Check for cracks, splits, or sagging in the beams. Look for water damage or pests that might weaken them.
• Immediate Replacement Needed: If a beam is damaged, it should be replaced right away. Using a deck with compromised beams can lead to serious safety risks.
  
  

When to HIRE A Professional for Deck RePairs: 

• Replacing damaged beams is complex and often requires lifting the deck. This job should be handled by a qualified contractor who can safely replace the beams with durable materials. They can also suggest stronger materials to enhance your deck's stability.

14. Loose Ledger Board

The ledger board is one of the most important parts of your deck, as it connects the deck directly to your home. Serving as a main support for the entire structure of your deck, any issue with the ledger board—especially if it becomes loose—can lead to serious problems like deck shifting, sagging, or even collapse. Several factors can cause a ledger board to loosen. The most common are improper installation, weather-related wear, and water damage at fastening points.

How to Fix It:

• Inspect the Ledger Board Look for any signs of looseness, rot, or damage. Pay close attention to the attachment points where the ledger connects to the house for any gaps or movement.
• Tighten the Fasteners If the ledger is only slightly loose, tightening the screws or bolts may solve the problem. Make sure all fasteners are secure and anchored into the house’s framing.
• Replace Damaged Fasteners If any screws or bolts are rusted or damaged, replace them with new, weather-resistant fasteners like lag screws or bolts designed for outdoor use.
• Reinforce the Ledger To add extra support, consider reinforcing the ledger with additional fasteners or brackets. This can prevent future issues with loosening.
• Check for Water Damage Inspect for any signs of water damage, rot, or mold around the ledger. If the wood is compromised, replace the damaged sections before reattaching or reinforcing the board.
  
  

When to HIRE a PRofessional for Deck Repairs: 

• Given the risks involved, repairing or replacing a loose ledger board is not a simple DIY task. If you suspect an issue with your deck’s ledger board, a professional deck contractor who has the tools, experience, and knowledge to handle it safely and effectively.

Benefits of Hiring a Professional for Deck Repairs

Repairs involving structural components, footings, posts, beams should always be left to a professional deck contractor. When it comes to structural repairs on your deck, hiring a professional deck contractor offers significant advantages over attempting DIY surface repairs.

A qualified contractor brings expertise and experience to the table, ensuring that repairs are completed correctly and safely. They can accurately assess the overall structural integrity of your deck, identifying underlying issues that might go unnoticed by an untrained eye. Additionally, contractors are familiar with local building codes and regulations, ensuring that all work is compliant and up to standard. Most deck contractors will also offer some type of warranty for their work. By investing in their expertise, you not only guarantee the durability and safety of your deck but potential costs associated with future repairs.

Get Started With Professional Deck Repair

Are you in need of deck repair services? CanaDeck’s professional deck contractors are here to help. Contact us today to schedule a free consultation!

By addressing deck repairs now, you can ensure your outdoor space is safe, functional, and visually appealing.