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Irrigation

 

Roanoke Landscape’s often gets questions from prospective customers about the costs and rewards of installing an irrigation system; which is understandable because installing an irrigation system is a big decision—one that customers will have to live with for a long time. There are many benefits to having an irrigation system, but, for some customers, irrigation might not be the perfect fit for addressing their landscaping needs. In the following Q and A, we address some of the most common questions regarding irrigation systems, providing an honest look at the pros and cons so you can make the choice that’s best for you.

 

What’s the advantage of having an irrigation system?

If you’ve ever flipped through the pages of “Better Homes and Gardens” and thought “Wow, I want a lawn like that” you’ve probably looked at a yard enhanced by an irrigation system. Pristine, green lawns require consistent, regular watering. When plants and grasses become too dry, they are susceptible to a host of diseases and pest-infestations. On the other hand, if they become too wet, they can succumb to destructive funguses. A properly designed irrigation system is programmed specifically to give your landscape the exact amount of water that it needs to thrive; regardless of what the weather forecast is like. Owners of irrigation systems don’t need to worry about drought or dampness, and they save a lot of time they might otherwise have spent on manual lawn maintenance.

 

How much does an average (6-zone) irrigation system cost?

The cost of an irrigation system varies widely depending on the size of your property, the kind of landscape you want watered, and the layout. Generally, for a 1/4th-1/3rd acre job at a typical residence built mostly on turf (regular grass) landscape, the cost of an installation is $6000-8000. This cost could fluctuate depending on changes in the landscape; for example, if the irrigation system is built to accommodate flower beds, landscape designs, patios, walkways, trees, utility lines, and driveways, the cost of the installation may increase. The price is also dependent on your property’s accessibility; whether technicians can use machinery to dig, or if they have to dig by hand. Certain fences, gates, slopes, and other obstacles will prevent technicians from accessing your property with machinery.

The cost of a ½ acre job on a normal residential property would be about $8000-10,000; also depending on changes in the landscape and special accommodations.

 

What is included in the price of the installation?

The initial cost includes the full installation of the irrigation system plus a “reclamation” of your yard. The installation process involves digging to install heads and lines, so clients’ yards inevitably become damaged. Yard reclamation, which takes place after the system is fully installed, typically involves planting new grass and covering with mulch, topsoil, and straw. In the months following your irrigation system installation, new grass will begin to grow and your landscape will eventually look better than it did before (and your new irrigation system will keep it looking that way for years to come).

The initial cost also includes your irrigation system’s spring startup and fall “winterization” (explained in more detail later). Additionally, an irrigation technician will walk you through how your system works and how to operate your system’s controller, answering any questions you might have about your unique set-up.

 

How long does an installation take and what does it entail?

The first step in a typical installation process is marking the utility lines. Utility workers from Virginia 411 will come out to a property and mark all of your utility lines with flags or removable paint. After the utility lines are clearly marked, an irrigation team will begin digging—irrigation lines are typically buried between 3 and 10 inches below the ground. Roanoke Landscapes bury lines 8-10 inches deep as an extra precaution to avoid damage from fall aeration and future landscape alterations; i.e. new plantings, invisible fences, etc. After the digging work is done, an irrigation team will begin installing lines and heads. After all the lines and heads are installed, the reclamation process can begin. After everything is complete, an irrigation technician will test the system to ensure it’s working properly. The installation, including reclamation, typically takes 5-7 days, weather permitting.

 

Do irrigation systems require yearly maintenance?

Yes. Irrigation systems are built out of sturdy materials and made to last. However, all irrigation systems require some yearly maintenance. In Virginia’s climate, irrigation systems typically run six months out of the year (April-October). Every spring, irrigation systems need to be turned on again after a winter of dormancy. During your irrigation system’s spring start-up an irrigation technician will come to your property, check your irrigation system, assess any needed repairs, and turn it on for you. Roanoke Landscapes’ spring start-up cost is $116 (for up-to 6 zones) and $12.50 for each additional zone. Once cool weather starts to move in during the fall, you’ll need to have your irrigation system shut down again and cleared out with a compressor to avoid water freezing in the lines or heads, which can cause leaks and cracks. This process is called “Winterization” and it is also completed by an irrigation technician. Roanoke Landscapes’ Winterizations start at $104 (for up-to 6 zones) and $12.50 for each additional zone. You have the option to be automatically scheduled for both of these services; whereas you’re added to our route and notified you when we are coming by your property. If you live in the city of Salem or Roanoke, operating an irrigation system also requires a yearly permit. A technician will test your system, as well as a city inspector, then we file the paperwork and return with a tag from the city. The yearly permit for the city of Roanoke costs $140. The yearly permit for the city of Salem is $125.

 

What is a “backflow?”

An irrigation backflow prevents dirt, fertilizer, pesticides, and any other chemicals you use on your landscape from contaminating city or county water lines. The backflow is connected to your water meter and is the first (and most important!) component of your irrigation system installation. Cities require every irrigation system to include a backflow. In order to be approved for a yearly irrigation permit, city contractors must inspect and test the backflow to ensure it’s working properly.

 

Does Roanoke Landscapes Warranty New Irrigation Systems?

Yes! Sometimes new irrigation systems require repairs due to issues such as defective parts or severe weather. For this reason, Roanoke Landscapes provides a one-year-warranty on every new irrigation system we install. The warranty includes all necessary repairs and our Spring Startup and Fall Winterization service. Additionally, the warranty covers any continued lawn restoration that needs to be done after the initial reclamation.

 

How long do the systems/heads usually last? What causes them to break?

Everything is typically made of plastic, so if properly cared for systems can last upwards of 15 years. High-quality lines can last a lifetime, and high-quality heads typically last several years before needing to be repaired or replaced. Bad weather, factory defects, and keeping a system dormant for a long period of time (i.e. several years) can all cause heads to become damaged after use. If your irrigation system needs to be serviced, and your system is out of warranty, Roanoke Landscapes charges $120 per hour (plus parts) for up to two technicians and any necessary equipment.

 

What do you mean by “heads?” How many different types of heads are there and what does each one do?

In your irrigation system, the irrigation “heads” are what pop up out of the lines and water your turf or garden. Most companies use different type of heads depending on the client’s needs—different brands and styles of head give off different amounts of pressure, which affects how much a yard is watered and the intensity of the watering. Some heads are better than others for specific landscaping needs, but each head can be outfitted with nozzles and rotors that control spray distance, speed, and the width of spray. Here are some of the most common heads that landscaping companies install:

Hunter PGP Ultra: A low-pressure spray, versatile.

Hunter PGJ: A low pressure spray good for a medium-large turf area.

Hunter i20: A high pressure spray good for a medium-large turf area.

Rainbird 1806: A lower pressure, smaller spray good for small beds and turf areas.

Rainbird 1812: A lower pressure, larger spray good for large turf areas and medium beds.

 

What is an irrigation “zone?” How do you determine how many zones an irrigation system has?

An irrigation system “zone” is an area within your landscape that has similar watering needs. An “average” system has about six zones, but there are many factors that could cause a client to want to increase or decrease the amount of zones they have, and all of these factors are based on the unique watering needs of a client’s landscape. The size of a client’s yard and garden beds, the amount of hardscaping breaking up the landscape, the slope of the property, and other landscaping factors can increase the number of necessary irrigation zones.

 

How often will my lawn be watered? Can I change my irrigation schedule?

Yes. Irrigation systems come with a watering schedule that illustrate all the different zones in your irrigation plan, how many heads are in each zone, and when your zones are scheduled to be watered. Most irrigation systems are set to water between 12am and 6am a few times each week. There are a couple reasons for this. First, your turf and beds can utilize water more efficiently if its given early in the day, before the sun and the heat cause evaporation. Second, most people are sleeping during this time, so the irrigation system is unlikely to disrupt clients’ normal routines. However, some clients want their irrigation systems running on a different schedule. An irrigation technician will show you how to operate the irrigation system controller after installation so you can adjust the watering schedule to meet your needs.

 

How much water does an irrigation system use?

An average six-zone irrigation system uses about 450 gallons of water each cycle. Most systems cycle about three times a week, so that’s around 1,350 gallons a week, though this could vary from client to client.

 

Is my water bill going to increase significantly?

Yes, you should expect an increase in your water bill—at least for a little while. Average water bill costs increase by about 80%-100% during the season, but some customers report much lower increases than that. The extent to which your water bill will increase depends on how your system is functioning. There are several widely available irrigation features that make irrigation systems more efficient and cut down on water usage. Customers who get “smart” weather-sensing controllers or rain sensing devices added on to their systems don’t usually experience a sharp increase in their water bills because these tools help systems use water more efficiently. Additionally, water bills will only be affected six months out of the year (when your system is operating), and irrigation systems use water more efficiently than watering a yard manually.

 

What is a smart controller? What is a rain sensor?

“Smart” Controllers are typically more expensive than regular controllers and automatically adjust your watering scheduled based on local weather forecasts. They’re able to tell when it’s supposed to rain and adjust how much water your system uses accordingly. This helps conserve water by keeping your watering schedule in-sync with natural weather changes. Similarly, rain sensors are system add-ons that use national weather survey data to “sense” when rain is coming so your system never over-waters your lawn. Many companies install rain sensors to new or existing systems for a small fee. Roanoke Landscapes charges $116 to install a new Hunter Wireless Rain Sensor.

If you have any additional questions, give us a call; we’d love to answer them. We only use the most acclaimed and trusted products in the field, including:

 

Hunter IndustriesIrritrolMMXI Netafim Irrigation, IncRain Bird Corporation
The Toro Company

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