Installing rain gutters is usually left to professionals. Proper installation of gutters and downspouts requires teamwork as the task is too cumbersome for one person. Tools required for installing certain types of gutters are expensive and specialized. Few people own seamless gutter machines, for instance.Safety is another consideration when installing gutters and downspouts. Installing rain gutters requires ladder work, which carries the risk of falls and injuries. Often such work is best left to professionals, although be sure that any contractors have proper liability insurance.Installing Gutters YourselfInstalling gutters yourself is possible as long as you use sectioned gutters. If you decide upon installing gutters yourself, seek help from someone who has performed the job before, and never try installing rain gutters without assistance.Before you start installing gutters and downspouts, map out your home's gutter run. You need to determine gutter length, how many downspouts you need, and the length of downspouts.Rain gutters must slope towards downspouts for proper drainage. Allow a half-inch of slope for every 10 feet of gutter. For gutters longer than 40 feet, it's often best to have the gutter's highest point in the middle of the run, and slope both directions towards downspouts.Before installing gutters yourself, check the roof fascia carefully for signs of rot. The fascia is the board that holds gutter brackets. Repair any rot before installing rain gutters.Instructions for Installing Rain Gutters and DownspoutsIf you decide to make a gutter installation a DIY project, the following tips can help:Using chalk, mark the highest and lowest points of the gutter. The lowest point will be where you attach the downspout.Using stainless steel lag screws, attach gutter brackets to every second rafter. Nails in the fascia indicate the presence of rafter ends.Cut gutter sections to length with a hacksaw or 12-inch miter power saw.Gutter ends that wrap around corners need to be cut to the same angle as the corner.When connecting two gutter sections, overlap the sections by 8 inches and connect with pop rivets. Use pop rivets on the side of gutters, never the bottom.Attach end caps with pop rivets and seal with silicone caulk.Cut downspout holes before installing rain gutters.Attach rain gutters to gutter brackets, and secure downspouts with pop rivets or stainless steel screws. Need More Help? If you need professional help with your project, LendingTree Home Pros can help. The good news is that LendingTree Home Pros maintains a directory of home service professionals and can match you with a home pro in your area. All the home pros listed in the LendingTree Home Pros directory are properly licensed and insured and are backed by a $10,000 money-back guarantee! Let LendingTree Home Pros help you find a pro today!