BioBarrier Root and Weed Control


Contact your utility company prior to trenching if you suspect service lines are present. Consult a professional arborist if root rimming is required.

Follow all EPA label instructions located on the box and yellow packaging sleeve when installing product. Additional instructions in box.


Biobarrier should be installed on the side of the trench opposite the root source.

Install and cover Biobarrier as soon as possible (within 12 hours) after opening sealed yellow bag; high temperatures and direct sunlight can reduce effective product life.


Cut a trench a minimum of 4 inches (100mm) wide and at least equal to the length of mature tree canopy plus 10 feet, centered on the root source and adjacent to the structure using clean-cutting trench digging equipment (see figure 1 ).

Cut all roots back flush to trench walls on both sides of trench. For some species, it may be necessary to spray the cut end of the severed root on the side opposite tree to prevent root regrowth under the hardscape. If this is necessary, use a systematic herbicide and be extremely careful to avoid contact with roots on the opposite side of the trench.

Smooth soil surface to desired FINAL GRADE LEVEL on side of trench opposite root source (see Figure 2).

CAREFULLY open yellow bag of Biobarrier on one end to prevent damage. Use yellow bag to store any unused product.

Roll out Biobarrier and trim to proper length. Place excess material back in yellow bag and seal tightly with spare ties provided.

Beginning at one end of the trench, hold product in place at finished grade level on the side of the trench adjacent to the hardscape (opposite root source) and stake in position using pins provided. Use Caution when handling installation pins – they are sharp.

Pins should penetrate fabric between the nodules -1/4″ from the top edge of the fabric and at -45 degree angle to the trench w all (see Fig. 3). Enough pins are provided to secure fabric every 2 feet. The top edge of the product must be at finished grade level for the entire length of the installation.

Backfill and tamp firmly to eliminate soil settling. Wet soil, if necessary, to ensure proper soil compaction.

NOTE: These guidelines treat a typical urban sidewalk application. Other installations such as property lines, building foundations, retaining walls, ornamental beds, septic systems, stormdrains, etc. may require minor procedural adjustments.

Biobarrier Weed Control Installation Guidelines

General Installation Guidelines


Review site-specific design plan with a certified local arborist for all applications specifically for depth of Biobarrier required and ESPECIALLY IF ROOT TRIMMING IS REQUIRED! Many tree species have varying root depths.

Contact utility companies prior to digging or trenching in the event service lines are present.

Wear chemical resistant gloves when handling Biobarrier to prevent staining.

See product label and Material Safety Data Sheet (MSDS) for further information.

Do not allow gaps in fabric during installation or backfilling

Many severed roots can regenerate, so they should always be completely removed. If removal is not possible, a systemic herbicide must be applied to severed roots to prevent re-growth. The systemic herbicide should be carefully applied, according to manufacturer directions, insuring that it does not come in contact with existing tree roots. This could damage or kill the tree.In high organic soils (>10%) with aggressive root species in close proximity to olefin plastics, spray or saturate trench walls with liquid trifluralin.

When joining two pieces of Biobarrier, be sure they do not become separated at any point. Seaming can be accomplished by using construction adhesive and/or overlapping. If the latter is used, seams should be overlapped at least 75mm (or 2 nodule widths). Sod pins may also be used for seams, but make sure there are no gaps.

Biobarrier should not be left exposed to surface water or sunlight for more than 12 hours since high temperatures and sunlight reduce effective life of product.

Biobarrier products are for non-food uses only.

Biobarrierstops roots within ~25mm of a nodule. Proper placement is very important;It is only effective where it is!

This chart is a general guide only. Your specific applications may require slightly different sizes.

In Stock 990mm and 1.49m other sizes can be ordered on request.