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Not wrapping a house before installing siding can lead to moisture intrusion, rot, mold, and even higher energy bills. Older houses may have siding installed without wrap underneath, so it’s a good idea to add a wrap layer when it comes time to replace old siding to prevent potential damage from water intrusion—local codes may even require it, so check with your municipal building authority. 

While you can perform minor siding repairs or even install it yourself over small areas, it is generally best to hire a professional siding company. Siding installation is a time-consuming and complicated process that requires specialized tools and experience. Most homeowners lack the skills to ensure proper alignment, weatherproofing, longevity, and durability, especially for more complex jobs like vertical siding. The money saved on a DIY project may not be worth the time and potential risks of improper installation.

You should plan to stain or refinish your home's cedar siding every three to seven years to maintain its appearance and provide maximum protection, though some estimates suggest a range of four to six years. The exact frequency depends on several factors, including your local climate, exposure to severe weather like direct sunlight, rain, and wind, the quality of the initial stain application, the type of stain used, and the overall condition and quality of the wood.

For homes in harsh climates with high humidity and significant sun exposure, you should plan on staining as often as every three years, while those in milder locations may only need to do so every seven years. For the longest-lasting protection in particularly harsh climates, consider using an opaque stain.

If you are looking for a lower-maintenance alternative, you might consider vinyl or aluminum siding. While the initial installation cost can be higher, they do not require as much upkeep and can offer more value over time, especially in areas with excessive rainfall or high humidity.

Although dish soap will work to clean some of the grime off the aluminum siding, it may not kill mold and mildew as efficiently as a cleaning solution you can buy at a hardware store. If you have oily or greasy substances on the aluminum siding, rather than mold and mildew, dish soap should work extremely well.