Exposed Maple Roots: To Cover or Not to Cover?

A homeowner with an old maple tree noticed bulging roots around the trunk and worried about stability during storms. The roots had surfaced, creating a tripping hazard and mowing difficulty.

Understanding Surface Roots

Contrary to common belief, cutting surface roots harms the tree. Approximately 90% of a tree's fine absorbing roots reside in the top 6–12 inches of soil. Roots need oxygen, water, and space—conditions best met near the surface. Adding soil over roots smothers them; even a few inches can kill a mature tree.

Safe Coverage Method

You can cover exposed roots with up to 2 inches of material. Coarse sand is ideal—it's lighter than clay or loam and less prone to compaction. Don't pack it down. Over time, roots may resurface as the tree grows; simply add more sand. Expect this cycle to repeat every 5+ years.

Root Growth Toward Structures

Roots growing toward a patio can be trimmed by digging a trench along the edge and cutting them. Removing up to one-third of the root system typically causes no visible decline. Root barriers installed along hardscapes offer longer-term protection.

Key Takeaway

Cover roots with 2 inches of sand, not topsoil. Avoid cutting major roots unless necessary, and never pile soil deeply over the root zone.