Waterproofing in Hot Climates

Extreme heat softens bitumen, causing slipping on slopes and stickiness.

Solution

Gilsonite raises softening point so coatings stay in place.

Challenges in the Gulf and desert regions

Roof surfaces can exceed 70 °C in summer, while nights can be much cooler. Soft bitumen slides down slopes, becomes sticky and ages quickly under strong UV.

Practical recommendations

• Specify compounds with a softening point well above maximum surface temperature.
• Use light-coloured or reflective top surfaces to reduce temperature.
• Protect membranes with tiles, screed or gravel where possible.
• Apply during cooler hours to control drying and avoid blistering.

Gilsonite’s role

Gilsonite is one of the most effective ways to raise the softening point of bituminous coatings and mastics, keeping them in place and reducing tackiness in extreme heat.

See waterproofing grade gilsonite and pipe coatings for hot climates.