Control Cavity

0.024" (0.6 mm) thick by 31.5 (1219 mm) wide high-impact polystyrene sheets formed with 3/16" (4.8 mm) deep corrugations, with channels running vertically when installed on a wall.

Floor Edging

0.024" (0.6 mm) thick high-impact polystyrene strip formed with 3/16" (4.8 mm) deep corrugations, bent into L-shape, 9" (229 mm) wide by 5" (127 mm) high, to fit on top of footing and below the edge of a slab on grade. The system shall form a control joint between slab and wall and serve as a thermal break between the slab and footing and/or foundation.

Mortar Belt

MTI Mortar Belt™ (#MB 3550): 0.024" (0.6 mm) thick high impact polystyrene strip formed with 3/16" (4.8 mm) deep corrugations; 33/8" wide, 50'-0" (15 m) long continuous belt. System shall be designed to suspend and trap trash mortar occurring within the cells of CMU.

Vent Mat

2.25" (57 mm) wide weep legs at 4.5" (114 mm) on center; continuous belt 2.5" (64 mm) wide; and total width of 1.5" (292 mm). Color is black.

Twenty Year Warranty

MTI's products are all covered by a 20 year limited warranty. Click here for details.

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Below-Grade CMU Walls

1Control Cavity™ Order Now!

2Floor Edging™is a moisture barrier, thermal break and slip sheet. It allows moisture to pass by the edge of a concrete floor and away from living areas. It helps prevent shrinkage cracks by allowing the floor to move. Order Now!

3 Mortar Belt™ Order Now!

4Vent Mat™ forms the bottom side of the bed joint of mortar. It creates 16 (3/16" x 3/16") weep holes in every block. All weep holes are at the lowest point of the wall and in every core. Order Now!

Control Cavity™ CC 4800*
It works because it separates wood framing, insulation and sheet rock from concrete or masonry walls.

Floor Edging™ FE 8555
It works because it is a thermal barrier and slip sheet that creates maximum flow capacity for moisture and separation at all points where the floor meets walls and footings.

Mortar Belt™ MB 3550
It stops and holds trash mortar away from core sides and bottoms and prevents trash mortar from plugging weep holes.

Vent Mat™ VM 9025
It works because it creates many weep holes at the lowest point of the wall, continuously along the wall.

*CautionCOMBUSTIBLE – Protect from open flame and/or other items producing high heat. Use MTI materials in strict conformance with local building codes and regulations. Consult with local code or building official prior to installation. It is the buyers’ responsibility to ensure that MTI materials are used in strict conformance with local building codes and regulations.