Can you put nails in the top shingles on roofing?

No, you should avoid putting nails in the top shingles of roofing. Doing so can compromise the integrity of the shingles, leading to leaks and water damage. Nails should be placed in the proper nailing zone, usually towards the lower edge of the shingles, to ensure effective sealing and protection against the elements. If repairs are needed, it's best to follow manufacturer guidelines or consult a professional.