Kitchen cabinets designed for indoor use often require additional weatherproofing and preparation before they can be safely and effectively used in outdoor environments. Properly weatherizing your cabinets will protect them from damage caused by exposure to the elements like rain, snow, humidity, and sunlight. With some simple modifications and maintenance, you can extend the life of your indoor cabinets and utilize them for stylish and functional outdoor cooking and storage spaces.

Assess the Cabinets and Space

Before beginning the weatherizing process, thoroughly examine the cabinets you intend to use and the outdoor space where they will be installed.

Consider the Cabinets

What material are the cabinets constructed from? Particle board, plywood, solid wood? Particle board will require the most weatherproofing. Plywood and solid wood are naturally more resistant to moisture and humidity.
What is the current condition of the cabinets? Look for any existing damage, cracks, peeling surfaces, etc. Any problem areas will need to be repaired and sealed.
Do the cabinets have any existing treatments, surfaces, or finishes? This will impact what preparations need to be done.
How will the cabinets be configured outside? As separate base cabinets and wall cabinets? Or together as full kitchen sets? Their configuration will determine what needs to be done to weatherize them.
Do the cabinets have functioning doors, drawers, and hardware? Examine all moving parts closely.

Evaluate the Installation Area

Is the space covered or uncovered? Covered spaces like porches may not need as much weatherizing as uncovered areas that are exposed to the elements.
What are the weather conditions like? Frequent rain, snow, and humidity will require more weatherproofing. Check for existing leaks in covered areas. Consider your climate zone.
Look at drainage around the space. Will water pool around the cabinets? Proper drainage is essential to keep cabinets dry.
How much sunlight will hit the cabinets? Direct sun can damage and fade surfaces over time. Plan for refinishing.
Do local building codes require any special preparations for outdoor cabinets? Research requirements before installing.

Clean and Repair Cabinets

Before weatherizing, thoroughly clean the cabinets and make any necessary repairs:

Remove all hardware including knobs, pulls, hinges, slides, etc.
Take out all drawers, shelves, and movable parts from the cabinet boxes.
Clean all cabinet surfaces, hardware, and removed components with a degreasing cleaner or mild detergent.
Lightly sand to remove any rough or damaged areas. Wipe away dust.
Fill any cracks, holes, and imperfections with waterproof wood filler. Allow to dry completely.
Replace any rotten wood or sections that are beyond repair.
Sand and wipe down all surfaces once more after repairs are complete.

Check Doors and Drawers

Ensure all doors and drawers align properly and open/close smoothly. Adjust hinges if needed.
Make sure drawers glide in and out without catching. Lubricate slides.
Verify a tight seal when doors and drawers are closed. Adjust as needed.
Examine the edges of doors and drawers for any splitting, cracks, swelling, or decay. Fill as needed.

Reattach Hardware Securely

Use longer screws designed for outdoor use to reattach all hinges, pulls, and hardware tightly.
Make sure screw holes are pre-drilled to the right size to prevent cracking or splitting wood.
Consider using rust-resistant hardware and fixtures rated for outdoor use.

Choose a Protective Finish

An exterior grade finish is essential for weatherizing kitchen cabinets. Consider these outdoor finish options:

Outdoor Paint

Use a high-quality 100% acrylic latex outdoor paint. It adheres well and blocks moisture.
Opt for satin, semi-gloss, or gloss sheen for best protection and easiest cleaning.
Primer formulated for exterior use will also help seal the wood. Apply 2-3 coats of topcoat paint.

Outdoor Stain

Oil-based stains offer good penetration and water resistance. Note they require more maintenance over time than paint.
Gel stains are thicker and resist drips and runs when applying. Easy to achieve an even color.
Use a finish coat like varnish or polyurethane over the stain for added protection.

Marine Varnish

High-gloss varnish creates a moisture barrier while accentuating the wood grain.
Look for UV-resistant varnish made specifically for exterior use on boats and ships.
Requires meticulous surface preparation for proper adhesion and protection.
Maintain with fresh coats of varnish yearly.

Clear Wood Sealer

Lets the natural color and texture of the wood show through.
Seals out moisture but requires refinishing every 1-2 years.
Will not hide any repairs, imperfections, or differences in wood color/grain.

Outdoor-Rated Patio Paint

Specifically designed to withstand weathering, fading, peeling and cracking.
Available in flat, satin and gloss sheens. Gloss offers the most protection.
May be acrylic or oil-based. Oil-based formula is more durable.
Priming first provides a uniform surface for topcoats.
Look for patio paint containing mildewcide additive.

Prime and Apply Finish Coats

Once you have selected an appropriate outdoor finish, properly prepare and coat the cabinets:

Sand and Clean Surfaces

Lightly sand all cabinet surfaces with 220 grit sandpaper to remove any gloss and create adhesion.
Clean and remove all dust with a tack cloth. Wipe with denatured alcohol for best results.
Use putty or caulk to fill any remaining imperfections. Allow to dry completely.
Replace hardware, shelves, etc. after painting to avoid stuck-on drips and splatters.

Prime Thoroughly

Use exterior-grade primer to seal the raw wood or existing finish and improve adhesion.
Apply primer to all exterior and interior cabinet surfaces, fronts, backs, sides, and shelves.
Use an angled brush to prime hard-to-reach areas inside cabinet boxes. Allow to dry overnight.

Apply Finish Coats

A minimum of 2-3 finish coats are recommended, 3-4 coats if possible.
Lightly sand with fine 320-400 grit sandpaper between coats for a smooth finish.
Carefully apply finish using a high-quality nylon or polyester brush, or sprayer for best results.
Allow proper drying time between coats according to manufacturer directions.

Final Touches

Avoid painting hinge mechanisms or slides to ensure smooth operation.
Let finish fully cure for several days before reattaching hardware and using cabinets.
Properly dispose of all soiled rags, which can combust, in an airtight metal container.

Make Sure Cabinets are Level and Plumb

Outdoor cabinets must be installed securely, level, and plumb for proper functioning:

Shims may need to be used under cabinets if the floor or surface is uneven.
Level from front-to-back and side-to-side using a 4-foot level.
The face frames should be flush and aligned vertically when installing multiple cabinets together.
Wall cabinets must be secured to wall studs or blocking to properly support weight.
Outdoor-rated mounting hardware, designed to resist corrosion, is recommended.
Allow for proper spacing between cabinets for installation of countertops or appliances.
Caulk gaps where cabinets meet walls, ceilings, or additional cabinets for a finished look.

Add Supports and Reinforcements

Due to increased exposure to the elements, outdoor cabinets may require additional structural supports:

Add Corner Braces

Install triangular metal corner braces on the underside of wall mounted cabinets.
These provide extra support at the vulnerable corners. Use weather-resistant screws.

Install Shelves and Pull-Outs Securely

For heavy-duty items, place shelves over supports or flush with the cabinet bottom. Avoid unsupported spans.
Use full extension, ball bearing slides rated for exterior use on pull outs. Locking mechanisms keep contents secure.
Ensure slides and shelves are safely anchored into the cabinet sides according to the hardware specifications.

Consider Extra Legs or Supports

Long runs of base cabinets should have an extra leg to reduce sagging over time.
Place a support under wall cabinet corners for additional strength.
Supports should screw securely into wall studs or use sturdy metal brackets.

Carefully Seal All Edges and Seams

Prevent moisture from seeping into unfinished wood edges and openings by sealing thoroughly:

Seal Exposed Edges

Look for raw wood along cabinet fronts, overhangs, openings for appliances, etc.
Use a flexible, waterproof sealant like silicone caulk to seal exposed areas.
Alternatively, you can brush exterior varnish onto edges for protection.

Seal Around Sinks and Appliances

Fill gaps around sinks, ranges, refrigerator openings, etc. with caulk.
Take care to neatly seal hard-to-reach corners and irregular spaces.

Seal Cabinet Joints

Anywhere two cabinets meet, seal the seam. Also look for gaps where cabinets meet walls.
Clear or colored silicone caulk works best. Avoid latex-based caulk outdoors.
Slowly apply caulk along the length of cabinets joints for smooth uniform beads. Immediately wipe away any excess.

Use Durable, Water-Resistant Materials

The right materials will extend the life of your outdoor kitchen cabinets:

Choose Exterior Plywood

Look for plywood made with marine grade waterproof glue between the plies. This reduces swelling and delamination.
AC, AB, or CD grade plywood will have fewer voids and defects than less expensive sheathing grades.
Pressure treated plywood is infused with preservative but doesn’t withstand weathering as well long-term.

Select Naturally Weather-Resistant Wood

Teak, cedar, cypress, and redwood have natural oils that help them stand up to the elements.
Dense hardwoods like mahogany, Shorea, Ipe, and Garapa are rot-resistant options.
Even with weather-resistant wood, use finishes for added protection.

Hardware Considerations

Opt for galvanized, stainless steel, or coated hardware to prevent rusting.
Look for exterior cabinet hinges and sliding mechanisms rated for outdoor use.

Use Aluminum in Wet Areas

Aluminum won’t rust and holds up well near sinks, cooktops, and appliances that generate moisture.
Anodized aluminum offers better corrosion resistance than standard aluminum.
Other wet areas include near wine refrigerators, ice makers, and dishwasher hookups.

Ensure Proper Ventilation

Trapped moisture is the enemy of outdoor cabinets. Ensure cabinets are designed to ventilate water vapor:

Install cabinets up off the floor or surface to allow air circulation underneath.
Include ventilation holes or gaps at the top and bottom of cabinet boxes.
Don’t place appliances or objects right against cabinets, allow space behind them.
Use louvered panels on cabinet doors and ends for increased airflow.
Stand cabinets away from walls for airflow behind them.

Keep Cabinets Well Maintained

No matter how well cabinets are weatherized initially, they will require regular upkeep:

Inspect and Check for Damage

Periodically examine under, inside, and behind cabinets for any leaks, cracks, swelling, rot, mold or insect damage. Catch problems early.
Look for finish cracks or peeling that allow moisture inside. Refinish damaged areas promptly.
Verify door and drawer alignment. Adjust hardware and lubricate as needed.

Touch Up Finishes

Expect to refresh painted or stained finishes yearly. Spot paint any damaged areas as soon as possible.
When finish begins cracking or peeling, thoroughly sand and apply fresh coats to all surfaces.
Maintain exterior varnish by reapplying coats as needed to repair scratches and keep cabinets protected.

Clean Cabinets and Check Drainage

Clean finished cabinet exteriors with mild soap and water using a soft sponge or cloth. Avoid abrasive cleaners.
Use exterior wood cleaner on unpainted or stained wood, then apply finish protector yearly.
Clear any dirt, leaves, or debris that may clog drains or compromise ventilation.
Check for standing water or excessive condensation. Improve drainage and ventilation as needed.

Ideas for Stylish and Functional Outdoor Kitchen Cabinets

With some creativity and the right weatherizing techniques, you can craft outdoor kitchen cabinets for any style or use case:

Mix Indoor and Outdoor Design Elements

Use durable outdoor base cabinetry paired with vintage stained cabinets for a shabby chic look. Just seal the vintage wood properly.
Contrast glossy paint on bottom cabinets with natural cedar plank wall cabinets.
Choose cabinet hardware and fixtures in an oil-rubbed bronze finish for an elegant outdoor feel.

Build Custom Features

Design open shelving for oils, spices, or barware that matches the rest of the cabinetry.
Construct a built-in beverage cooler or grill right into the cabinet configuration.
Include a section of blackboard wall for leaving messages, writing grocery lists, or displaying menus.
Use cabinets to partition different functional zones like cooking, prep, and eating areas.

Get Creative with Storage Solutions

Make use of the cabinet interiors with pull-out spice racks, vertical dividers for sheet pans and baking sheets, and “blind corner” lazy susans.
Use cabinet tops for herb gardens or succulents planted right in the cabinet crown molding.
Include weatherproof storage bins for items like soaps, cleaning supplies, and first aid. Label for organization.
Install spring-loaded retractable clotheslines between cabinets for drying dish towels or bathing suits.

Consider Your Needs

Center cabinets around tasks like a grilling station, pizza prep area, or bar with under-cabinet wine storage.
Allow for a food prep zone, consider including a sink, trash/recycling bins, and nearby storage.
Build shelving to display pretty serveware and plates for outdoor dinner parties.
Leave enough counter space for gatherings and food presentation.

FAQs About Weatherizing Kitchen Cabinets for Outdoor Use

Q: Can you just waterproof the cabinets rather than doing full weatherization?

A: Waterproofing alone is not enough protection for extended outdoor use. You need to waterproof, prime, paint, inspect for leaks, add supports, seal edges, ensure proper ventilation, and do ongoing maintenance. Taking all these steps will properly weatherize cabinets.

Q: What should you avoid when selecting cabinets to use outside?

A: Avoid particle board or MDF cabinets outdoors since moisture causes them to swell and disintegrate quicker. Also avoid laminate and thermofoil finishes that can bubble and peel. Unfinished, bare wood that hasn’t been properly sealed is not a good choice either.

Q: Do outdoor kitchen cabinets need to be covered or can they be open to the elements?

A: You can use kitchen cabinets outdoors in both covered and uncovered settings as long as you prepare them properly. Covered spaces may allow you to skip some steps like finish coats. Uncovered cabinets require every weatherization step.

Q: How often do you need to re-seal or re-coat outdoor cabinets?

A: Every 1-2 years, re-seal or re-coat your outdoor cabinets, more often if they get heavy use. Inspect frequently for any chips, peels, cracks or signs of water damage and spot repair those areas as needed between major refinishing jobs.

Q: Why do cabinet edges need to be sealed?

A: The exposed edges of plywood and solid wood are more vulnerable to moisture than the finished cabinet face frames. Water can seep into unfinished edges, causing swelling, warping, and rot over time. Sealing edges protects cabinets.

Q: Can you use indoor kitchen cabinets outside without modifying them?

A: We don’t recommended using indoor stock cabinets outside without any weatherizing modifications. They will deteriorate quickly when exposed to sun, rain, humidity and the outdoors. At minimum, they would need sealing, hardware upgrades, ventilation, and routine maintenance.

Q: Does adding an awning or cover over outdoor cabinets reduce weatherizing needs?

A: Adding a roof or awning will provide some protection and potentially allow you to get by with fewer weatherizing steps. However, condensation can still occur, so sealing the wood completely is still best practice for long-lasting outdoor cabinets.

Conclusion

Upcycling indoor kitchen cabinets for outdoor use is an excellent way to save money while getting stylish, durable results. By taking the time to properly clean, repair, seal, paint, reinforce, and ventilate your cabinets, you can successfully repurpose indoor cabinetry to create a functional outdoor cooking space. A quality exterior finish coat and diligent maintenance will be required to keep your weatherized cabinets looking beautiful for years to come. With creative storage solutions and design, your outdoor cabinets can provide both style and utility while withstanding the elements.

How to Weatherize Kitchen Cabinets for Outdoor Use