Our 10 year Workmanship Guarantee! By Law we are required to guarantee 7 years of stess free service to our customers but we figured why not round it up?. So we did. On completion of your painting service we will provide you with a letter of warranty and keep one for our records just incase you lose it. Any damage caused by Lamb Painting & Decorating is now covered under our BIG 10 year workmanship warranty. If damage is assessed to be the fault of Lamb Painting & Decorating