trim mat installation

[brnt]

I am required to install trim mat on a steep slope to protect it from erosion and allow plant growth. The specs describe installing the mat paralell to the slope. My contractor--who is very experienced--says it makes more sense to install it perpendicular to the slope, like shingles on a roof. I talked to another of my regular contractors who is also very experienced, and he agrees with the first contractor--perpendicular to the slope from the bottom up like shingles. Does anyone have an opinion on this?

 

[bimr]

In areas of broad sheet flow, the mats may be placed vertically or horizontally. In areas of concentrated flow, the mats should be placed vertically.

http://www.metrocouncil.org/environment/water/BMP/CH3_RPPSoilMulch.pdf

The orientation of the mats will depend on the specifics of your layout. You may be areas with broad sheet flow and areas with concentrated flow.

 

[dicksewerrat]

If poosible, I'd look at 'Geoweb' material and willow plant stock.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[cvg]

install generally paralell with flow and overlapping the downstream fabric similar to shingles.