How to Address Uneven Floors During a Kitchen Remodel in Older Washington Properties

Washington state is home to many historic and older properties, each with its unique charm and character. However, one common challenge homeowners face when remodeling their kitchens in these older homes is dealing with uneven floors. Uneven flooring can create structural issues, impact the installation of cabinets and appliances, and even pose safety hazards. Fortunately, with proper assessment and corrective measures, you can create a level and stable foundation for your new kitchen. Here’s how to address uneven floors during a kitchen remodel in Washington properties.

Step 1: Identifying the Cause of Uneven Floors

Before attempting any repairs, it’s crucial to understand what’s causing the uneven flooring. Some common reasons include:

• Foundation Settlement – Over time, homes naturally settle, leading to dips or slopes in the flooring.
• Wood Rot and Moisture Damage – Given Washington’s damp climate, water damage and wood rot can weaken the subfloor.
• Structural Shifts and Aging Materials – Older homes may have shifted slightly due to seismic activity or long-term wear on support beams.
• Poor Past Renovations – Previous remodeling projects may have created inconsistencies in floor leveling.

Step 2: Evaluating the Severity of the Issue

Once you’ve identified potential causes, assess the severity of the uneven flooring:

• Use a level or laser level to measure slope variations.
• Check for noticeable soft spots, which could indicate subfloor damage.
• Look for visible cracks in the flooring or separation between floorboards.
• Determine whether the issue is localized (a single area) or widespread throughout the kitchen.

If the problem is minor, you may be able to fix it with simple leveling techniques. If it’s severe, professional intervention may be required.

Step 3: Correcting Uneven Flooring

The solution you choose will depend on the extent and cause of the uneven flooring.

1. Self-Leveling Underlayment

For minor unevenness (less than 1/2 inch difference), applying a self-leveling underlayment is a quick and effective solution. This liquid compound spreads over the subfloor and hardens into a smooth, level surface. It works best for:

• Concrete subfloors
• Slightly sloped wood subfloors

2. Installing Plywood Overlays

If the subfloor is slightly uneven, laying a plywood overlay can help create a smoother surface. This method involves:

• Attaching a new layer of plywood over the existing subfloor.
• Using shims or spacers to adjust for dips and slopes.
• Securing the plywood with screws to prevent movement.

This approach works well when installing hardwood or tile flooring in older homes.

3. Joist Adjustment and Structural Repairs

For more significant unevenness (more than 1/2 inch), you may need to inspect and adjust the floor joists. This process can involve:

• Sistering joists – Attaching a new, level joist alongside the existing one for added support.
• Shimming – Inserting thin wood or composite shims to even out variations.
• Replacing damaged joists – If rot or severe wear is present, replacing sections of the joists may be necessary.

This method is ideal for homes with significant structural shifting.

4. Subfloor Replacement

If moisture damage, warping, or rot is extensive, replacing the entire subfloor may be the best solution. This involves:

• Removing the old subfloor material.
• Checking for and repairing any foundational or framing issues.
• Installing a new, stable subfloor using plywood or oriented strand board (OSB).

Though more costly and time-consuming, subfloor replacement provides a long-term solution for stability and durability.

Step 4: Selecting Flooring Materials Suitable for Older Homes

Once the subfloor is level, it’s important to choose flooring materials that work well in older properties:

• Engineered Hardwood – Offers stability and resists moisture better than solid wood.
• Luxury Vinyl Plank (LVP) – Flexible and forgiving on minor floor irregularities.
• Tile with Proper Underlayment – Helps compensate for minor imperfections.
• Floating Floors (Laminate or Cork) – Installed without being fixed to the subfloor, allowing some flexibility.

Step 5: Hiring Professionals for Structural Issues

If you suspect significant structural problems, hiring an experienced contractor is the best course of action. A professional can:

• Assess the foundation and structural integrity.
• Provide expert leveling solutions tailored to your home.
• Ensure compliance with Washington’s building codes.
• Help prevent future issues that could arise from improper floor leveling.

Final Thoughts

Addressing uneven floors in older Washington homes is essential for a successful kitchen remodel. By properly diagnosing the problem, applying the right leveling techniques, and choosing appropriate flooring materials, you can achieve a functional and aesthetically pleasing kitchen space. Whether you’re making minor adjustments or undertaking major structural repairs, investing in a solid foundation will ensure your remodel stands the test of time.