A thorough house wash can significantly improve a home’s appearance, sometimes making older siding look nearly new. These cleanings are not only cosmetic but also play a key role in maintaining a healthy and safe home environment.
Health and Insurance Implications
Mold and mildew on exterior surfaces are not just unsightly they can impact indoor air quality, especially if windows are left open. Additionally, insurance companies are becoming more proactive, with many homeowners receiving warnings or cancellation notices if visible mold or lichen isn’t addressed. In such cases, it’s crucial to get documentation from professional cleaners to provide proof of remediation, even if the growth remains visible temporarily.
Soft Washing vs. High Pressure
Roof cleaning requires a special “soft wash” technique that kills moss, mold, and lichen without using damaging high-pressure water. While this treatment is effective, results can be gradual. For instance, lichen may turn white after being killed but won’t necessarily fall off immediately. Some mosses, like flat green or clumpy types, fall off quickly, whereas tougher varieties like red-tipped or orange/yellow lichen can take several months or even up to a year to fully detach. These persistent types may require additional agitation later, but always with caution to avoid roof damage.
DIY Challenges and Best Practices
Homeowners who attempt to wash their own homes often use tank sprayers, which typically don’t apply enough solution to effectively treat surfaces—especially those with heavy lichen growth. Stewart Painting and House Washing advises against wetting the cleaning surface beforehand, as a dry surface absorbs the cleaning solution more effectively. However, it’s important to thoroughly wet and protect nearby windows and vegetation to avoid chemical damage. Proper rinsing is essential after application to activate the neutralizing agents in the solution and ensure a safe, complete clean.
Special Considerations for Wood Surfaces
When treating natural wood siding like cedar shingles, be aware that leftover bleach or cleaner can weaken the wood’s surface by making the dead wood fiber brittle. This becomes especially problematic when staining, as the weakened surface won’t hold coatings well. While rinsing is always recommended, it’s more critical when applying a finish. If the wood is being left natural, rinsing remains beneficial but is less essential.
Cost-Effectiveness and Maintenance Planning
Regular professional washing can be a smart investment. It helps prevent the need for more expensive and labor-intensive repainting or re-staining jobs. Many homeowners find that routine cleanings every few years are sufficient to keep surfaces in good shape, reduce mold regrowth, and prolong the lifespan of exterior finishes, all while satisfying insurance company demands.
