I want to recycle left-over architectural shingles on walking paths in my vegetable garden. Are they toxic?

Question

I want to recycle left-over architectural shingles on walking paths in my vegetable garden. Are they toxic?

Answer 1

I don't know about toxic, but they are made with petroleum products.

Answer 2

That depends on what kind of shingles you're talking about.  Terra cotta would be okay.  But please do not use asphalt shingles.  It doesn't matter if they're brand new-never been used, they still contain toxins which will leach into the ground.  

If you have leftover shingles you can use them to roof a playhouse or dog house.  There are also companies which recycle asphalt shingles into road surfacing material.  

For your garden path I strongly recommend using materials designed for that purpose.  Your plants will thank you.  :)