How to Maintain Aluminum Siding
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Aluminum siding has long been a popular choice for homeowners and commercial buildings due to its durability, weather resistance, and sleek appearance. Unlike traditional wood siding, aluminum is resistant to rot, pests, and fire, making it a low-maintenance yet long-lasting option. However, like any exterior material, regular upkeep is essential to maintain its aesthetic appeal and structural integrity. Dirt, pollutants, and environmental exposure can cause gradual wear, leading to fading, staining, or corrosion if not properly cared for. By following a consistent maintenance routine, you can extend the lifespan of your aluminum siding and keep it looking as good as new for decades.
In this guide, when we refer to siding, we’re specifically referring to our latest Lap Siding and Board & Batten profiles. While our cladding products are periodically also referred to as “siding,” there are important differences to keep in mind. To clarify these distinctions, check out our section, “What is the Difference Between Siding & Cladding?” Our cladding falls under the Pinnacle Warranty and may require different maintenance procedures than those outlined here.
Warranty Information
The first step to maintaining aluminum siding is to consult your manufacturer warranty & maintenance guide. These documents will outline what process to follow to ensure your aluminum siding stays pristine.
For Longboard, the Core Warranty, covers all the specifics on what is and isn’t covered in the 15 years. Here are a few key points:
Dual Warranty Coverage:
- 15-year non-prorated warranty on the powder-coated finish, protecting against cracking, chalking, and color fading.
- 50-year non-prorated warranty on the extruded aluminum profiles, ensuring structural integrity.
Limitations & Exclusions:
- Damage from handling, shipping, or installation.
- Scratches or abrasions after installation.
- Exposure to corrosive environments (e.g., marine or industrial chemicals).
- Natural disasters, fire, riots, or other external forces.
Required Maintenance:
- Proper cleaning is necessary to keep your warranty valid.
- Cleaning must follow Longboard’s Care & Maintenance Guide—only soft sponges, mild detergent (pH 5-9), and no pressure washing or harsh chemicals.
- Keep records of maintenance, including dates, cleaning products used, and personnel details.
Claims & Remedy Process:
- If defects occur, Longboard may choose to repair or replace the product.
- The maximum liability is limited to the original material cost (excluding labor and installation costs).
- Claims must be submitted within 30 days of discovery.
Understanding these details ensures your siding remains covered. Now, let’s look at the best ways to maintain aluminum siding.
Precautions
- Avoid harsh acid or alkaline cleaners on Longboard finishes.
- DO NOT use cleaners containing Tri-Sodium Phosphate, Phosphoric Acid, Hydrochloric Acid, Hydrofluoric Acid, fluorides, or other reactive chemicals.
- Always dilute cleaning solutions according to manufacturer instructions.
- Test a small patch before cleaning large sections.
- DO NOT clean Longboard products in freezing temperatures—this can trigger aluminum reactions.
- Watch for overspray when cleaning windows or nearby surfaces.
- Avoid excessive scrubbing, which can wear down the finish faster.
- Never use strong solvents like thinners or cleaners with chlorinated hydrocarbons, esters, or ketones.
- Wear gloves and safety goggles to shield against cleaning agents and debris.
Initial Cleaning After Installation
Your Longboard products should be cleaned immediately after installation. This is to remove any construction dust, aluminum shavings or other contaminants which may increase the risk of a permanent blemish.
Cleaning should be done in mild weather, and never in direct sunlight if avoidable. Always complete a test patch on an inconspicuous area to ensure your detergent is suitable for the surface. Pressure washer are not recommended, instead, use a garden hose with a spray nozzle.
If heavy build up is present, using a mild detergent with a pH between 5-9 can be used alongside a soft sponge.
Maintenance Schedule
The next step is to figure out how often you should clean your brand new siding. This will largely depend on the region you are installing in, and the conditions around your home. The following list shows different environmental conditions to take into account and their respective frequency of maintenance.
Environment at Location of Install
- Aggressive / Active Job Sites
- Inspect / Clean every month.
- Industrial
- Inspect / Clean every three months.
- Chlorinated Pools
- Inspect / Clean every three months
- Coastal
- Inspect / Clean every three months.
- Tropical
- Inspect / Clean every six months.
- Non Aggressive
- Inspect / Clean every year.
Cleaning Based on Soil Level
Next, each soil level will have slightly different steps:
Light Surface Soil:
- Start at the top and work downward.
- Use a garden hose with a spray nozzle (avoid pressure washers).
- Apply moderate water pressure to rinse off dirt.
- If needed, use a soft sponge or brush with mild detergent.
- Rinse thoroughly and let dry.
Medium Surface Soil:
- Start at the top and work downward.
- Use a garden hose with a spray nozzle.
- Apply moderate water pressure.
- If needed, use a nylon cleaning pad.
- Rinse thoroughly and let dry.
Heavy Surface Soil:
- Start at the top and work downward.
- Use a garden hose with a spray nozzle.
- Apply moderate water pressure.
- If necessary, use a mild solvent, but avoid prolonged use as it may degrade coatings.
- Always test a small section before applying to the entire surface.
- Rinse thoroughly and let dry.
Removing Graffiti
IMPORTANT: These steps apply to siding only. Do not use them on Longboard’s woodgrain cladding, as they will damage the coating.
To remove graffiti:
- Choose an approved solvent, dilute and prepare as per manufacturer instructions.
- Identify the affected area and test a small, hidden section.
- Apply to the remaining areas as per manufacturer instructions.
Closing Thoughts
By following these maintenance guidelines, your aluminum siding will retain its beauty and durability for years to come.
Regular cleaning, proper care, and attention to environmental factors will keep your Longboard siding looking and performing its best in any setting.
