I have read about the 6 inch offset method of installing shingles. My question concerns how to handle the situation when there is only a small amount for the last shingle in a row. In another words, the width of my roof leaves me with a a 1/2 inch wide shingle for the last shingle in a row. Is there something I should do to prevent this from happening? I don't think a 1/2 inch wide shingle will be very effective.

Thanks, in advance, for your help.

shingle spacing

Shingle spacing help