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Siding underlayment varies based on the type of material, but most siding is installed on top of a vapor barrier, a moisture-resistant house wrap, sheathing made from plywood or oriented strand board (OSB), and a layer of insulation sheeting. Having the correct underlayment is a critical part of properly installing siding and will protect your home from water intrusion, structural damage, and energy loss.

To clean painted aluminum siding, use a mixture of mild detergent and water applied with a soft brush or sponge. Rinse thoroughly with a garden hose to remove soap residue. For stubborn stains, cleaning aluminum siding with a power washer on a low-pressure setting can be effective. But avoid using high pressure, which could damage the paint.

Vinyl, brick veneer, stucco, steel, stone veneer, and composite siding are popular alternatives to wood siding. Which siding material is best for your home boils down to your budget, aesthetics, lifestyle, and climate. For example, stone veneer offers a timeless charm and is low maintenance but may have too high of a price tag. Meanwhile, some homeowners love vinyl siding for its low cost, while others dislike it for its appearance and shorter life span.

Avoid toxic chemicals that can leach into nearby lawns, as well as household ingredients like vinegar that can ruin paint and sealants. Instead, look for a very light detergent or a dedicated exterior siding cleaner. In a pinch, you can use a basic dish or laundry soap, but we suggest sticking with a dedicated cleaner.

If your siding is struggling with algae or moss, which indicates moisture issues, look for an outdoor cleaner that’s specifically designed to clear moss and algae stains. This is also a sign that you need to seal your clapboard against further problems.