Mildew, Moss, and Mold

The three M's, Mildew, Moss, & Mold, are usually fuzzy, greenish or bluish-grayish-white and THEY'RE ALIVE! Cement and tile roofs are especially prone to mildew because they contain minerals which are needed to support growth. Generally, shaded areas and areas of poor drainage allow mildew to grow.

To protect your roof, provide proper drainage and expose shaded areas to sunlight where possible. Susceptible areas that cannot be corrected should be cleaned with a chlorine bleach solution twice each year.

PREPARATION: Clean the roof surface by power-washing or scrubbing with TSP (Trisodium Phosphate), available at most hardware stores. Treat mildewed areas with a chlorine bleach solution. Rinse the entire surface thoroughly and let dry.

Follow the Kool Seal easy 3-step process for the Kool Seal Elastomeric Coating System:

Patch with White Acrylic Patching Cement
Reinforce with Kool Flexx Reinforcing Grid
Coat with Kool Seal White Elastomeric Roof Coating

Moss: very small plants that grow in velvety, green clusters on damp surfaces.
Mold: a downy or furry growth on the roof surface caused by fungi, especially in the presence of dampness or decay.
Mildew: a fungus that can appear on a surface when exposed to dampness, it appears as a thin, furry, whitish discoloration.