Hot tar waterproofing is a proven exterior waterproofing method used to help protect concrete foundation walls from water penetration. The process involves applying heated waterproofing asphalt/tar to the foundation surface, creating a strong protective barrier against moisture, groundwater, and below-grade water pressure.
At Seal Pros Waterproofing, we provide hot tar waterproofing for residential, commercial, and new construction foundation projects across the GTA and surrounding areas. This service is commonly used on exterior foundation walls, below-grade concrete, and areas that require durable waterproofing protection before drainage board, insulation, or backfill.
Hot tar waterproofing can help reduce the risk of basement leaks, wet foundation walls, moisture damage, and long-term water intrusion. It is often used as part of a complete exterior waterproofing system with proper surface preparation, membrane application, protection board, drainage layers, and foundation wall protection.
Seal Pros Waterproofing provides professional hot tar waterproofing, foundation waterproofing, exterior waterproofing, basement leak repair, foundation crack injection, concrete foundation crack repair, and below-grade wall protection across Toronto, Mississauga, Brampton, Oakville, Burlington, Hamilton, Milton, Vaughan, and the GTA.
Hot Tar Waterproofing: Process & Benefits
Hot tar (multi-layer) waterproofing is an engineering-grade solution for maximum durability. It provides a seamless, high-build membrane designed to withstand hydro-static pressure in below-grade foundations.
1
Surface Prep
The foundation wall is cleaned and primed to ensure the hot rubberized asphalt bonds completely to the concrete surface, preventing lateral water migration.
2
Multi-Layer Melt
We apply hot-melt rubberized asphalt reinforced with polyester fabric. This creates a thick, seamless, self-healing membrane that remains flexible year-round.
3
Protection Board
A high-density protection course or drainage mat is installed over the membrane to protect it from damage during backfill and facilitate water flow to the weeping tile.
4
Long-Term Seal
Ideal for new construction or major restorations where long-term performance is critical. This process ensures a lifetime seal against the harsh GTA climate.