Mold and Mildew Treatment

Mold and mildew on exterior surfaces are living organisms. Simply washing the surface removes the visible growth but leaves the root system behind, allowing rapid regrowth. We use professional biocide treatments that kill mold and mildew at the root before pressure washing. The result is a cleaner surface that stays cleaner significantly longer than pressure washing alone.

Algae Removal

Green and black algae is common on shaded exterior surfaces, concrete, roofing, and driveways across Montana. Like mold, algae establishes a root system in porous surfaces. Our soft wash process uses algaecides that penetrate and kill the entire organism, not just the visible surface layer. We treat roofs, siding, driveways, walkways, and retaining walls.

Rust Stain Removal

Rust stains on concrete, driveways, and siding come from metal furniture, irrigation systems, well water with high iron content, and fertilizer. Standard pressure washing does not remove rust stains — they require specialized oxalic acid-based treatments that chemically dissolve the iron oxide. We apply rust removers with appropriate dwell time before rinsing, achieving dramatically better results than pressure washing alone.

Frequently Asked Questions

Will the mold come back after treatment?

Our biocide treatments significantly slow regrowth compared to pressure washing alone. However, in persistently damp or shaded environments mold will eventually return. We recommend annual treatment for those areas.

Are your rust removal chemicals safe for landscaping?

We take precautions to protect landscaping during rust treatment. Oxalic acid treatments are diluted and rinsed thoroughly. We wet surrounding plants before and after treatment as a protective measure.