A Guide to Turf Reinforcement Matting (TRM)
Turf Reinforcement Matting (TRM) is a professional-grade erosion control solution designed to permanently stabilize
hillsides, vegetated channels, and slopes. Constructed from a 3D network of bonded monofilament polymers, this
matting creates a secure framework for soil and plant roots to take hold.
Installing TRM on a slope
The mat’s 95% open structure ensures space for root systems to grow securely while holding soil in place. TRM
helps slow down water runoff and reduce wind shear, which allows young vegetation to establish itself more
successfully. Once root systems are anchored, the vegetative cover works in tandem with the matting to reinforce
the terrain.
- Permanent erosion control on slopes up to 1:1
- Ideal for channels with shear stress ≤ 8 psf
- Stable base for hydroseeding (FGM or BFM)
- Meets FHWA FP03 Type 5B TRM specifications
- Dense polymer network prevents buoyancy (“No Float”)
Where TRMs Work Best
TRMs are especially effective for hillside stabilization, swales, stormwater channels, and embankments where
vegetation alone struggles to thrive. Because of their non-buoyant design, they remain anchored during heavy
rainfall and storm events. They’re commonly used in combination with hydroseeding or sod placement, helping
establish strong root systems that enhance ecosystem stability.
These mats are not only environmentally beneficial but also cost-effective for long-term erosion control
compared to recurring silt fencing or slope repairs. Once installed, they require minimal maintenance and
naturally blend into the surrounding landscape as vegetation fills in.
TRM installed on open slope
Case Study: Stabilizing a New Construction Hillside
A commercial builder in the Pacific Northwest faced a challenge with a newly cut slope behind a retail development.
Heavy seasonal rains were causing surface runoff and soil displacement. The landscape architect specified Turf
Reinforcement Matting to anchor the hillside before vegetation was added.
The matting was installed over compacted topsoil and secured with ground staples at 18" intervals. A Flexible Growth
Medium (FGM) was sprayed on top. Within 6 weeks, native grasses had taken root through the matting. After 6 months,
the hillside was fully green, with erosion rates reduced to near zero during winter rains.
Fully stabilized, vegetated slope
This case illustrates how TRM provides permanent erosion protection, even on steep slopes with moderate to heavy
rainfall. The combination of matting and vegetative growth created a sustainable, maintenance-free solution that
also improved the overall look of the property.
Final Thoughts
Turf Reinforcement Matting is a reliable, long-term solution for erosion control on hillsides, slopes, and vegetated
channels. By creating a supportive structure for soil and plant growth, TRMs improve both the function and
appearance of landscapes. For projects where permanent control and vegetation establishment are critical, this type
of matting is a smart investment.
