New deck installed, painted with brown oil base stain. Now I see black marks appearing. What is this?
If the marks appear near nails or screws then they could be caused by rust or the galvanized coating. If away from metal parts, then it could be tannin bleed or wood sap.
Find contractors in your area & receive a free estimate.
Register for an account - Contractors choose the PRO option for your free contractor profile.
Enter the destination URL
Or link to existing content