Expert Basement Repair

(HDP) High Density Polyurethane is a two part polymer foam product which once injected below a slab will fill voids and raise the slab back to level.

This two part material is injected through 5/8th inch holes drilled into the slab on a grid pattern. The two part liquid once injected penetrates the subsurface soils much like water through a sieve.

Within a few seconds the liquid becomes a dense foam. This foam encapsulates everything it has come in contact with and expands to fill any voids. Additional material is added to raise the slab as required. Within minutes the foam has hardened. A lazer level is utilized to monitor slab movement. It is possible to restrict the operation to the consolation of the sub base only or also to lift the slab, depending on the project. Injection depths can range from 3'-30' depending on need.

HDP  Advantages:

• Smaller injection holes than traditional mudjacking.
• HDP hardens within minutes allowing the area to be put back into service quickly.
• HDP material penetrates the subsoil rather than sitting on it as with the mudjacking method.
• HDP has a high compressive strength and consolidates the subsurface soil.
• HDP is very lightweight.
• HDP acts like insulation below the slab once cured.
• HDP is also a water barrier.
• HDP displaces trapped water and air.

HDP Disadvantages:

• Slightly more expensive than mujacking
• Minimum job size required