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Mirafi HP370 Geotextile Fabric

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Mirafi HP370 Geotextile Fabric - 15' x 300' Roll - Solmax

$2,837.18


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SKU MIRAFI-HP370-15x300


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This product: 4500 sq ft / roll
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Woven Multifilament Reinforcement

The Mirafi HP-series is a woven multifilament geotextile built for high-performance separation and reinforcement.

These fabrics pair high tensile strength with strong water flow, so they reinforce and separate soft subgrade while still draining, unlike typical slit-film wovens. The range steps up in strength from HP270 through HP770 to match increasing load demands.

The HP-series suits stabilization, subgrade separation, and reinforcement on roads, working platforms, and structural fills where both strength and permeability are required.

Square Feet / Roll: 4,500
Weight: 290 lbs
Fabric Specifications:  Download HP370 Specification Sheet

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Questions? (800) 748‑5647
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Why Choose Mirafi HP370?

5 reasons engineers specify Mirafi HP-series over generic woven reinforcement fabrics

Superior Wide-Width Tensile for Subgrade Reinforcement

Higher tensile strength than standard nonwovens for subgrade reinforcement applications where fabric strength is design-critical.

Engineered Where Nonwovens Are Insufficient

For applications requiring documented wide-width tensile capacity, HP370 provides the performance data engineers need — nonwovens typically cannot match.

DOT-Specified, Wyoming WYDOT Pre-Approved

Mirafi HP370 meets Wyoming WYDOT subgrade reinforcement requirements and appears on DOT qualified products lists in multiple states.

USA-Made, BABA Eligible

Produced in Georgia — qualifies for Build America / Buy America requirements on federally funded subgrade reinforcement projects.

Long TenCate Infrastructure Project History

Mirafi HP-series woven fabrics have a documented track record on DOT subgrade reinforcement projects where performance data is required.

Frequently Asked Questions

This Product is Stocked in the California and Georgia Distribution Centers Only.

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PRODUCT SUMMARY

  • Reinforcement Strength: Higher tensile modulus properties per ASTM D4595 than any comparable stabilization product.
  • Separation and Filtration: Unique geotextile weave provides excellent separation factors with controlled filtration and drainage. Uniform openings provide same filtration and flow characteristics as that of a fine to coarse sand layer.
  • Durability: Superior damage resistance for moderate to severe stress installations.
  • Soil Interaction: Superior soil confinement resulting in greater load distribution.
  • Roll Sizes: Mirafi ® HP geotextiles come in multiple roll sizes to fit your project requirements.
  • Seams: Panels can be sewn together in the factory or field, providing cross-roll direction strength to facilitate installation.

YOUR TRUSTED
MIRAFI SUPPLIER

  • We are an authorized Mirafi distributor.
  • We only sell genuine Mirafi fabric. We never ship mislabeled overruns or "knock-offs".
  • You order Mirafi, we ship Mirafi. Even if a stock issue arises we never substitute for another brand without the customer's direct consent.
  • When you call, we answer. When you call Paramount Materials you get a live person quickly, ready to help with product or order questions. (M-F 5:00 am - 3:00 pm Pacific Time)

Fabric Shipping Time - Georgia Warehouse:

By default, Mirafi fabric orders ship from the Georgia warehouse where a full stock of the Mirafi fabric types are maintained. Most orders ship same day (M-F) if order is placed before 11:00 AM EST. Transit times displayed in the map are listed in business days, are approximate and are specific to the Mirafi fabric line. The day that the order is shipped is not counted as a transit day. Most Mirafi fabric rolls ship via LTL freight. For expedited shipping rates please call: (800) 748-5647

The transit times displayed on the map are for our free shipping option.

Fabric Shipping Time - Southern California Warehouse:

Note: By default, orders ship from the Georgia warehouse with the standard transit times shown above. If you would like your order to ship from the Southern California warehouse (Mira Loma) you must first fill out a stock check request. Orders can also be picked up at this warehouse location if preferred. Southern California warehouse orders must be placed over the phone.

Most Mirafi fabric California warehouse orders ship same day (M-F) if order is placed before 11:00 AM EST. Transit times displayed in the map are listed in business days, are approximate and are specific to the Mirafi fabric line. The day that the order is shipped is not counted as a transit day. Most Mirafi fabric rolls ship via LTL freight. For expedited shipping rates please call: (800) 748-5647

The transit times displayed on the map are for our free shipping option.

PRODUCT INFORMATION - HP SERIES FABRICS:

TenCate Mirafi® HP-Series Woven High-Performance Polypropylene Geotextiles:

TenCate Mirafi® HP-Series high performance geotextiles are used for base course reinforcement and soil stabilization/reinforcement applications. Produced from high tenacity polypropylene yarns, HP-Series Geotextiles are specifically designed to provide separation, filtration, and reinforcement for moderate to severe site condition. These geotextiles are extremely versatile, ensuring long-term performance in new roadway construction. The combination of high tensile strengths and excellent filtration/separation characteristics make TenCate Mirafi® HP-Series geotextiles the complete geosynthetic.

TenCate Mirafi® HP-Series woven high-performance polypropylene geotextiles function for:

Separation
Filtration
Soil Reinforcement
Confinement

The Difference TenCate Mirafi® HP-Series woven high-performance polypropylene geotextiles make:

Weave provides excellent separation factors that control filtration and drainage
High soil confinement for greater load distribution
Durable and superior damage resistant
Cross-roll direction strength when panels sewn together

System Solutions:

Mechanically Stabilized Earth
- Embankments
- Walls: Permanent and Temporary

Roadway/Railway Construction

Roadway and Railway Stabilization and Reinforcement
- Base course reinforcement and sub-grade restraint

Erosion Control
- Land Reclamation

Waste Management
- Containment

TenCate Mirafi® HP-Series woven high-performance polypropylene geotextiles…geosynthetics that make a difference.

TenCate Mirafi® HP Series Specification Sheets


Case Studies

With and Without Using HP370

HP370 makes a big difference on road

Case Study: Mirafi HP370 – The Challenge

The time frame was to finish approximately half of a mile of flexible pavement roadway in January 2003. Country Trail  and Marvino Lane are major collector roads that servie over 300 homes and a strip mall.  To make things more difficult, the area's natural soil deposits contain high levels of silt which would be a major problem for the life of flexible pavements.

The Design

Due to possible discrepancies in the subgrade soils, especially during construction in the winter months, the city required the contractor to use a biaxial geosynthetic placed under the 8-inch of graded aggregate base course which is normally required. Unlike stabilization applications, there would be very little stress caused in the geosynthetic installation. Applying the high tensile modulus geosynthetic that also separates would offer additional benefits in the pavement when the subgrade soil softens and loses support over time.

Construction

The condition of the majority of the subgrade soil seemed to be firm during the construction of the flexible pavement.  Utilizing wide rolls of Mirafi® HP370 would allow the contractor to place panels three-wide with the needed amount of overlapping on these collector roads.  Using  TenCate Mirafi® geosynthetics allowed the contractor to keep the flexible pavement construction schedule for the project on time.

Follow-Up

At the end of the original case study, photos were taken of the represented area on Country Trail where the geosynthetic was used along with a section of Parkstone Drive which was constructed 6 months earlier without geosynthetic.

In February 2011, the same areas were inspected and new photos taken to record any changes in the roads.  In the areas of Country Trail and Marvino Lane that had installed Mirafi® HP370, there were no signs of deterioration.  The asphalt did show some wear but nothing that indicated deterioration of the subgrade or any base course issues.

On the other hand, Parkstone Drive which was constructed without geosynthetic continued to deteriorate. It seems a section of the pavement had been replaced and areas adjoining the repairs are starting to show signs of fatigue. A different section of pavement showed signs of early deterioration further into the development of Country Trail Road beyond where the geosynthetic was used. This section of Country Trail was constructed a year after the first pavement areas that used geosynthetics.

Performance

The road areas that took advantage of  Mirafi® HP370 significantly surpassed other areas that did not use geosynthetics during construction. The pavement areas using Mirafi® HP370 seem to have higher ADT than the other areas.  Mirafi® HP370 was able to provide reinforcement, confinement, and separation of the base course from the silt subgrade conditions added over 10% to the structural number of the non-reinforced pavement section. The additional benefits in structural numbers practically doubled the allowable ESAL's under the same subgrade conditions. Using standard installation costs for reinforced sections would be approximately $18/SY.

Mirafi® HP370  has proved to be an excellent product that gives contractors and construction sites what they are looking for and lives up to its reputation. The installation of Mirafi® HP370 added less than 20% of additional costs and could be easily justified by the increase in the pavement area's service life.