House Washing Maintenance Schedule
Protect your siding from Colorado's UV, algae, and pollen with a soft wash every 12-18 months.
Every 12-18 Months
North-facing walls and homes near trees or irrigation may need annual washing. If you notice green or gray discoloration, don't wait for the full interval.
Why Routine Maintenance Matters
Colorado's intense UV, rapid temperature swings, and seasonal moisture create the perfect environment for algae, mold, and pollen buildup on your home's exterior. Regular house washing removes these contaminants before they cause permanent staining, siding damage, or health concerns. A consistent maintenance schedule protects your investment, preserves curb appeal, and keeps your home looking its best year after year. Soft washing—not high pressure—is the safest and most effective method for siding. It uses specialized detergents to kill biological growth at the source, then gently rinses with low pressure. This prevents water intrusion behind siding, protects manufacturer warranties, and delivers longer-lasting results than pressure washing alone.
When to Schedule
Spring
Mar – May
Ideal time to wash. Removes winter grime, road salt residue, and early pollen. Schedule in March-April before cottonwood season peaks.
Summer
Jun – Aug
Monitor for algae and mold growth, especially on north-facing walls. Irrigation overspray can accelerate biological growth.
Fall
Sep – Nov
Wash after pollen season to remove residue and prepare siding for winter. September-October is an excellent window.
Winter
Dec – Feb
Avoid washing when temperatures are below 40F. Spot-treat visible growth only.
Colorado's Climate Impact
Colorado's high-altitude UV breaks down siding pigments faster than at sea level, making clean surfaces even more important for reflecting harsh sunlight. Freeze-thaw cycles can trap moisture and contaminants against siding, accelerating damage. Spring pollen and cottonwood debris create a biological film that feeds algae growth, while summer irrigation systems introduce moisture that mold loves. Timing your wash around these events prevents buildup from becoming permanent. The combination of 300+ days of sunshine and dramatic temperature swings means siding degrades faster here than in milder climates. Algae and mold that take hold during warm, moist months become embedded by the time winter arrives, making them far harder to remove.
Is Your House Washing Due?
Schedule your house wash in early spring-before cottonwood seeds drop in late May. The sticky seed pods bond to siding and are far harder to remove once they've set. A pre-season wash prevents them from adhering in the first place.
Frequently Asked Questions
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Our team can assess your property and recommend the ideal maintenance schedule for your Colorado home.