When considering an investment that can add value to your home, it's only prudent to evaluate your options thoroughly. You'll want to make certain you're comparing apples to apples when it comes to product quality and installation proposals. With that in mind, the checklist to the right has been provided for your convenience. An Authorized Contractor List Is Available Online. For your convenience, Belgard /Anchor has developed a website featuring a listing of authorized installers throughout Connecticut, New Jersey, New York and Pennsylvania. All of the contractors listed have the following requirements: They are ICPI Certified They are NCMA Certified They have 5-years of experience (installing paving stones and retaining wall systems) They guarantee their work for at least 2-years They are a licensed Contractor They have provided three references (one job in progress, one recent job and one done 5-years ago) They have a certificate of insurance To find a qualified hardscape contractor in your area, visit www.findahardscapecontractor.com QUALIFICATIONS:  A good indication of experience and knowledge is ICPI certification (Interlocking Concrete Pavement Institute). REFERENCES:  Request two or three references. Any reputable contractor would be pleased to provide you with a number of references — satisfied homeowners who had their project completed by their firm. INSURANCE:  Request proof of proper insurance. PLACE OF BUSINESS:  Make certain your contractor has an established place of business. INSTALLATION ESTIMATE:  For comparison purposes, you may want to request more than one proposal or estimate. Before signing a contract, take the time to read it carefully — including any and all fine print. PRODUCT SELECTION:  Your dealer or contractor can assist you in identifying the products, colors and shapes best suited for your particular project. To assure your total satisfaction, it's always a good idea to request actual samples of the product to be used. GUARANTEE:  Each submitted estimate should include a written workmanship guarantee, along with any existing manufacturer's warranty covering the materials to be used. The standard workmanship guarantee is 2-years. BUILDING PERMITS:  Make sure there is an understanding (written or otherwise) as to who will be responsible for securing the proper building permits. Your contract should also include wording stipulating that your installation will meet all current building codes. Word of Caution: Be suspicious of unrealistically low bids — estimates that allow for "equivalent" materials.