50 McGrath Road P.O. Box 670 Dracut, MA 01826Toll Free 1 (800) 343-0001Fax 1 (978) 452-9988

Distributor of Building Materials since 1847

Why Delta®?

DELTA® is a brand of Cosella-Dorken Products Inc. They strive to deliver innovative premium quality products to the North American construction market, after being a long time leader in the European building industry.  DELTA® products have the longevity, quality, and technology that are desired in the building industry today. At Portland Stone Ware we are not just about supplying the heavy, rock-hard products, but we also seek out premier products that are innovative materials for the building/masonry industries and are complimentary to our other product lines.

Delta Comparison Chart

Delta MS Product Sheet

While we do have access to the complete Delta® product line, PSW stocks two systems:

  • Below grade moisture protection systems, known as DELTA®-MS, DELTA®- DRAIN, DELTA®- FL, and DELTA®-FOOTING BARRIER
  • Building wrap systems known as DELTA® RAINSCREEN SYSTEMS, DELTA®- DRY and DELTA®- DRY STUCCO & STONE
DELTA products, DELTA MS

DELTA®-MS – Foundation Waterproofing Membrane

DELTA®-MS is a highly effective foundation protection system, based on a uniquely shaped air-gap membrane. It reliably keeps ground moisture away from the foundation wall – a key factor in achieving a permanently dry basement. This dimpled membrane is impermeable to water and water vapor. The vacuum formed exclusive dimple pattern creates an air-gap between the membrane and the foundation wall. This unique design allows any incidental water getting past the dimpled membrane to flow freely to the perimeter footing drain. The air-gap guarantees a safe separation and full capillary break between the foundation wall and any ground moisture. Delta MS rolls comes in the following sizes:

Roll Sizes – Sq Ft/Roll:

5′ X 65’6″ – 328
6′ X 65’6″ – 394
6’6″ X 65’6″ – 430
7′ X 65’6″ – 459
8′ X 65’6″ – 527
9’8″ X 65’6″ – 645


  • DELTA®- MS ACCESSORY KIT: 13 pieces of Flash (6ft), 75 pieces of Fasteners, 2 Quarts of Caulking, 1 box of Concrete Nails
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DELTA®-DRAIN – Damproofing/Waterproofing membrane with Drainage

DELTA®-DRAIN is a highly effective drain board that controls the flow of below grade water. Its high water-flow capacity ensures effective drainage for virtually any construction project. The drain board enhances the effectiveness of waterproofing because it relieves hydrostatic pressure build-up against subterranean surfaces. This product can be used for drainage in hillside construction, residential and light commercial foundations, ICF-foundations, wall drainage over waterproofing applications, retaining walls, etc.

Roll Sizes – Sq Ft/Roll:

6′ X 65’6″ – 394
8′ X 65’6″ –  527


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DELTA®-FL– Keeps Floors Warm & Dry

DELTA®- FL – is an innovative subfloor system for concrete and slab on grade floors that helps to keep moisture out of your basement. It provides a significantly more comfortable floor. This product is a uniquely dimpled, heavy-duty gray plastic membrane that keeps your basement floor, or any slab-on-grade concrete floor, dry and comfortable. The membrane is installed with its dimples down to create an air space above the slab. It can be covered with laminate floor systems, or with a plywood subfloor topped off with carpet or vinyl flooring and will keep floors warm and dry

Roll Sizes – Sq Ft/Roll:

3.5’ X 30’ – 105
5’ X 65’.6” – 328


  • Delta Moistureproof Tape (FL Tape) 108 FT LONG (2.35″ X 36.10yd)
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DELTA®-FOOTING BARRIER – Capillary Barriers Moisture Protection

Capillary Barriers Moisture Protection is tough and pliable membrane that resists the capillary rise of water from footings into foundation walls. It helps to protect the basement from mold, deterioration of moisture sensitive materials and unhealthy living conditions. DELTA®-FOOTING BARRIER acts as a physical barrier, resisting the capillary wicking of water and upward migration of moisture from the footings into the foundation wall that is also known as rising damp. The material is designed to adhere well to the concrete footing. It is very pliable, allowing the forming of a keyway as per common practice.

Roll Sizes – Sq Ft/Roll:

17.7″ X 82 FT

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DELTA®-DRY – Weather-resistive barrier & drainage membrane for residential & commercial construction

DELTA®-DRY Is a weather-resistive barrier & drainage membrane for residential & commercial construction. The Ventilated Rainscreen is an innovative approach of solving moisture problems in building wrappings. This is an ideal protection behind adhered absorptive claddings. Proper ventilation is key for wall performance and the prevention of moisture accumulation. The structured membrane provides drainage and ventilation, as well as a complete capillary break behind the cladding. It protects the building envelope from bulk water intrusion (i.e. wind driven rain), and manages water leakage through the cladding. As well, DELTA®-DRY captures and drains transient moisture migrating through the wall structure. DELTA®-DRY provides an air-gap on the interior and exterior side of the membrane for drainage and ventilation.

Roll Sizes – Sq Ft/Roll:

3’3″ X 50′ – 164

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DELTA®-DRY STUCCO and STONE is also an innovative Ventilated Rainscreen very similar to Delta@-Dry only with a pre-installed mortar screen that prevents scratch coats from filling its dimple structure.

Roll Sizes – Sq Ft/Roll:

3’3″ X 46′ – 151

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