Your Homeowners policy and personal Umbrella policy includes coverage for Bodily Injury, Property Damage and Personal Injury. This does not include coverage for serving on non-profit Boards.
You may purchase an individual Directors & Officers Liability policy if you want for your own protection however this is a separate policy from your Homeowners policy.
The bottom-line is do not serve on a non-profit Board unless they have a Directors & Liability policy in place for the non-profit.
Thank you for serving!