Here are ways to save on tree work and get good results

If you treat them right, trees can shade your house, beautify your property, and even save you money on energy. But diseases, pests, or extreme weather can impact the sturdiest oaks. And even healthy trees need a little branch management in the form of regular pruning or the occasional checkup.

To keep your trees in shape or to get rid of dying ones, you will likely need professional advice, skill, and labor. To help you find this help, nonprofit consumer group Delaware Valley Consumers’ Checkbook has surveyed its members and other consumers about their experiences with area tree care services. Until Oct. 5, Checkbook is offering free access to its ratings of area tree care services to Inquirer readers via Checkbook.org/inquirer/trees.

You don’t have to be an expert to spot many potential tree problems. Examine your trees several times a year for the following:

Other reasons for tree work include eliminating the risk to your house, or to electrical or other utility wires from rubbing limbs or precarious overhanging limbs; letting light and breezes more readily reach your house, garden, or lawn; and protecting foundations and drainage systems from invading roots.

In many cases, the problem and the solution will be obvious — removing specific limbs, for example. But sometimes it’s difficult to diagnose and treat trees. At those times, you need expert advice.

But don’t assume that all estimators from tree care companies can determine what’s wrong and prescribe the correct treatment. Checkbook’s evaluation of local tree care services found big company-to-company differences in the quality of advice and work performed. Although several area companies rate quite high for the quality of their work, the news is not all good. In addition to complaints of lousy customer service by companies that rate poorly, customers often complained of being overcharged, getting poor results, and having their property damaged by careless, untrained workers.

If you need tree care work, the best strategy is to get more than one opinion. Invite representatives of several companies to your home to offer estimates. Ask them to explain what they plan to do and why.

Along with several opinions, you’ll get comparative pricing. Checkbook’s undercover shoppers found striking differences in prices for tree care work. For example, to remove a 45-foot oak tree, including removal of all wood and debris and grinding the stump, companies quoted Checkbook’s undercover shoppers prices ranging from $1,933 to $3,340. To remove a 60-foot elm, grind the stump, and remove all debris, quotes ranged from $2,347 to $4,480.

Typically, you don’t have to be home when bidders are looking at the job — but do make sure you get a thorough description of the work in a written contract that specifies who cleans up afterward, hauls away debris and wood, and removes the stump. What is not specified in writing is very unlikely to get done. No-shows are common, so call more companies than you need bids from to make sure you get enough to make a smart decision.

If a job can wait, consider having the work done in winter, when companies are less busy and there is less debris to haul away.

Check whether a company’s liability insurance and worker’s compensation insurance are currently in effect. Ask to see certificates of insurance and call the company’s insurance carrier to verify. This is a serious concern because high-powered equipment, heavy branches and trunks, lofty heights, and proximity to power lines make tree work dangerous.

Ask about the company’s payment policy to see how much of the total cost is payable upon completion of the job or later. Paying after the work is completed gives you leverage to ensure that work is carried out properly and on time.

If you need expert advice and help caring for your trees, rather than simply removing goners, look for certification by the American Society of Consulting Arborists (www.asca-consultants.org) or the International Society of Arboriculture (www.isa-arbor.com). Certification by either organization indicates the arborist has a degree in arboriculture, several years of experience, and passed a difficult exam.

Delaware Valley Consumers’ Checkbook magazine and Checkbook.org is a nonprofit organization with a mission to help consumers get the best service and lowest prices. We are supported by consumers and take no money from the service providers we evaluate.