Having a gap between your backsplash and wall can be unsightly and allow water and grime to collect. Thankfully, there are several effective methods to fix this common issue. We will discuss the reasons you may have a backsplash gap, preparation steps, and provide easy step-by-step instructions for different solutions. With a little time and effort, you can have your backsplash neatly flush with the wall once again.
Reasons for a Backsplash Gap
There are a few common reasons a gap may form between your backsplash and wall:
Improper Installation
The most likely cause of a backsplash gap is that it was not properly installed in the first place. Common installation mistakes that can cause gaps include:
- Not adequately spreading adhesive on the backsplash or wall before applying the backsplash. This prevents strong adhesion.
- Not using backsplash spacers during installation. These small plastic spacers ensure an even gap width while the adhesive dries.
- Not properly cutting holes for outlets and light switches. Gaps will form around areas improperly fitted.
- Failure to use a level during installation. The backsplash can become misaligned and leave gaps.
- Applying too much pressure during installation. This can push the backsplash out of position.
Settling of the Wall or Backsplash
Over time, walls and backsplashes can shift and settle, causing gaps to form. Factors like humidity changes, foundation settling, or damage to the wall can cause subtle alignment issues.
Moisture Damage
Exposure to excessive moisture behind the backsplash can damage adhesives and cause the backsplash to detach from the wall. Leaking faucets, pipes, and accumulated condensation are common culprits.
Improperly Secured Backsplash
Some backsplash materials like metal, glass, or large-format tiles can become detached if not properly secured to the wall. Improper adhesive choice or spreading and lack of mechanical fasteners can allow the backsplash to pull away from the wall.
Preparing to Fix a Backsplash Gap
Before applying any solution, it is important to properly prepare the backsplash and wall:
Clean the Gap
Use a small vacuum attachment or damp rag to remove any debris, grime, or old caulk from the gap. Ensuring the space is clean allows your repair to properly adhere.
Dry the Area
It is important the gap is dry before applying any adhesive solutions. Allow any moisture to fully evaporate. A hair dryer on a low setting can help speed up drying.
Remove Loose Backsplash Pieces
If sections of the backsplash are no longer well-attached, carefully detach them from the wall fully. Any loose pieces can interfere with proper repairs.
Cut Away Protruding Adhesive
If there are areas where old adhesive protrudes from the gap, carefully trim it flush with the wall using a utility knife.
Once clean and dry, you can move onto the optimal fix for your situation.
How to Fix a Backsplash Gap
There are several effective options for fixing backsplash gaps. Consider the size of the gap, available tools and materials, and your skill level when deciding on the best method.
Caulk
Caulking is the easiest and quickest solution for small backsplash gaps under 1/4 inch.
What you’ll need:
- Caulk gun
- Kitchen/bathroom caulk
- Caulk smoothing tool (optional)
Steps:
- Ensure the gap is clean and dry.
- Load caulk into caulk gun according to manufacturer’s instructions.
- Apply a steady bead of caulk into the gap. Keep an even line thickness and fully fill the space.
- Use a damp fingertip or caulk smoothing tool to shape and flatten the caulk.
- Allow caulk to fully cure based on product directions before exposure to water.
Silicone caulk is long-lasting and flexible. Look for mold-resistant bathroom caulk for added protection from moisture.
Adhesive Sealant
For slightly larger gaps up to 1/2 inch, an adhesive sealant is a good fix.
What you’ll need:
- Caulk gun
- Kitchen/bathroom adhesive sealant
- Backer rod (for large gaps)
Steps:
- Ensure the area is clean and dry.
- For larger gaps, press an appropriate diameter backer rod into the gap so it sits 1/2 inch back. This prevents three-sided adhesion.
- Load sealant into caulk gun according to manufacturer’s instructions.
- Apply a steady bead into the gap, keeping thickness consistent.
- Tool sealant to flatten and smooth. Remove any excess.
- Allow sealant to fully cure based on product directions before water exposure.
Look for a flexible, waterproof sealant designed for kitchen and bath use.
Reattach Loose Pieces
If sections of the backsplash have detached, you can attempt to re-adhere them.
What you’ll need:
- Tube of kitchen/bath adhesive or silicone
- Mechanical fasteners (for heavy backsplash materials)
- Masking tape
Steps:
- Lightly roughen the wall and backsplash surfaces with sandpaper.
- Apply a zig-zag bead of adhesive to the backsplash piece or wall.
- Firmly press the backsplash into place, aligning the edges cleanly. Use masking tape to hold in place while drying.
- For heavy materials like glass or stone, screw in evenly spaced mechanical fasteners for added support.
- Allow adhesive to fully cure for at least 24 hours before removing tape and exposing to water.
Be sure to use enough adhesive and fully cover any detached areas to create a lasting bond.
Reattach Whole Backsplash
If the entire backsplash piece has detached, it can be reattached to the wall using adhesive and screws.
What you’ll need:
- Tube of kitchen/bath adhesive or silicone
- Backsplash tiling spacers
- Mechanical fasteners
- Tape measure
- Level
Steps:
- Remove backsplash and scrape away old adhesive from wall and backsplash. Lightly sand surfaces.
- Starting at the bottom, apply spacer strips every 8 to 12 inches across the base of the wall. Ensure they are perfectly level.
- Run a zig-zag bead of adhesive along the top of the spacers.
- Place the backsplash onto the spacer strips, pressing firmly. Check alignment with a level.
- Insert backsplash screws every 8 to 12 inches into the wall studs. Focus on the top and bottom edges especially.
- Apply a bead of adhesive or silicone between the backsplash and wall along the top and side edges. Tool into any gaps.
- Allow adhesive to fully cure for at least 24-48 hours before exposure to water.
The spacers will account for any wall irregularities while keeping the backsplash correctly aligned as it dries.
Remove and Replace Backsplash
If reattachment is not successful or the backsplash damage is too severe, complete removal and replacement may be required.
What you’ll need:
- Hammer and chisel
- Tube of kitchen/bath adhesive or silicone
- Tiling spacers
- Tile cutter (if needed)
- Backsplash material
- Masking tape
Steps:
- Carefully pry off the damaged backsplash with a hammer and chisel. Remove any remaining adhesive.
- Spread adhesive on the wall using a tiling trowel. Orient the trowel at 45 degrees for optimal adhesion.
- Press spacers every 8 to 12 inches across the base of the wall to create an even surface.
- Cut backsplash pieces to fit, allowing a 1/8 inch gap between pieces. Dry fit first before adhering.
- Firmly press backsplash tiles into the adhesive in the desired pattern, working row by row. Use tape to hold pieces in place as needed.
- Allow adhesive to fully cure based on manufacturer’s directions before grouting or exposing to moisture.
Be sure to select a water-resistant adhesive suitable for backsplash installation.
Apply Wood Trim
For minimal gaps between tile and wood walls or cabinetry, small wood trim pieces can serve as attractive covers.
What you’ll need:
- Measuring tape
- Finish nails
- Miter saw
- Prefinished wood trim strips
- Wood glue
Steps:
- Measure and cut trim strips to length to span the gap, with 45 degree angle cuts for corners.
- Run a small bead of wood glue on the backside of the trim.
- Press trim firmly into place until excess glue squeezes out. Clean excess with a damp cloth.
- Secure trim with finish nails every 16 inches, angled into the wood wall or cabinetry. Avoid the tile backsplash face.
- Fill nail holes with wood filler and sand smooth once dry.
- Use caulk between trim edges and tile/cabinetry for clean finish.
Prefinished hardwood trim offers an easy solution that can match cabinetry or flooring. Pine, oak, maple, and hemlock are common options. Apply wood stain if needed to match.
Preventing Future Backsplash Gaps
To prevent gaps from recurring, keep these tips in mind for any future installations:
- Ensure the wall surface is smooth and even before installing backsplash. Fix any imperfections.
- Only apply backsplash to cured paint and primer no sooner than 2 weeks after application.
- Use the appropriate adhesive for the backsplash material. Consult manufacturer recommendations.
- Thoroughly stir and apply adhesive using the proper trowel size.
- Allow adhesive to sit for the directed time before applying backsplash (“slake” time).
- Use backsplash spacers for even alignment and gap width.
- Carefully cut backsplash around outlets, switches, and plumbing fixtures for tight fit.
- Apply steady pressure when setting backsplash, but avoid excess force.
- Allow proper adhesive curing time before grouting or exposing to moisture. Don’t rush.
- Caulk perimeter edges with silicone for water protection and an attractive finish.
Frequently Asked Questions About Fixing Backsplash Gaps
- How can I tell if I need to remove and replace the backsplash completely?
You likely need a full backsplash replacement if multiple areas are no longer adhered, the damage spans over 50% of the surface, cracks or loose pieces are present, or attempts to reattach have proven unsuccessful.
- What tools do I need to remove the old backsplash?
Start by scoring around backsplash edges with a utility knife. Then use a hammer and chisel, prying from the bottom up, to detach it from the wall. Scrape away old adhesive with a putty knife once removed.
- Should I use silicone or traditional adhesive to re-apply backsplash?
For porous natural stone, ceramic, or cement backsplashes, use a kitchen/bath adhesive specifically designed for that material. For metal, glass, and other non-porous surfaces, silicone offers better adhesion and flexibility.
- How long does backsplash adhesive need to cure before grouting?
Adhesive needs 24-48 hours to fully set and cure before grouting. If applying a decorative border, wait 72 hours. Insufficient curing can cause failure between tiles and adhesive.
- How can I prevent damage when removing old caulk?
Use a plastic putty knife or an old credit card to gently scrape away caulk without scratching tiles or walls. Go slowly to avoid digging into surfaces. Wipe area clean when done.
- What’s the best way to apply caulk for a smooth finish?
Dispense caulk at a consistent rate, keep an even line thickness, and use a dampened fingertip or silicone shaping tool to smooth and shape. Take your time for neat results.
Fixing the gap between backsplash and wall is usually a simple weekend project. With the right preparation and method for your specific situation, you can repair backsplash gaps and have it looking flush and flawless once again. Be sure to address the underlying cause of the issue as well to prevent more gaps from forming. With a little patience and elbow grease, this common kitchen nuisance can be remedied.
Conclusion
Having a gap between your backsplash and wall not only looks unsightly but can lead to moisture damage and grime buildup. Thankfully, there are several effective options to repair the gap, whether simply re-caulking or performing a full backsplash replacement. With proper cleaning and preparation of the area and use of the right adhesive products and materials, the gap can be fixed, often without the need for professional help. Just be sure to identify and address the initial cause of the gap as well. Keeping the backsplash flush and seamless protects your kitchen wall and adds to the aesthetic.