Green Roof Primer! (Because, why not?)

As Spring hits across the country, we all get excited about landscapes greening up and blooms happening in the ground and on the trees.

Recently, I was asked by a local Master Gardener group to write about green (vegetated) roofs. This time of year, they are very busy answering horticultural questions to prepare owners for the growing season ahead, so I thought it was a timely ask!

Take a look at the green roof introduction and overview blog here! 

We also recently hung out at the Central States ASLA conference and met a lot of designers looking to help their clients alleviate their stormwater management issues while providing some awesome finished looks to their sites!  The conference was in St. Louis, home of the great Missouri Botanic Gardens where many species were in bloom and smelling great!

More info and Answers at AD Greenroof LLC

Heading to the Int'l Roof Expo and NWIR

I'll be taking advantage of a trip to Nashville next week to catch up with my roofing friends! I'm also looking forward to meeting new folks at the National Women in Roofing.

The Expo always proves to impress with new trade show booths, new ideas, and showcasing manufacturers proven products. Networking on the side is also where it's at!

Who wouldn't want to take a break and walk around outside, dip into dive bars to hear some live Nashville music, and even hit up some museums??

If you are headed there Feb 9-13 let me know, love to chat all things green (vegetated) roofs!

Late October 2018, Minneapolis native green roof

Angie Durhman
angie@adgreenroof.com

www.adgreenroof.com

Heading to Greenbuild 2018!

It's been a while since I've attended Greenbuild. I had a dose of overload of sustainability topics, hence my absence in the last few years(especially since I work in it every day).

Let's hope the conference proves innovative and inspirational in Chicago!

I plan to walk the floor and chill out with the young gang at the Hanging Gardens booth #221.

See you there!

National Pollinator Week!

13 June 2017 on a Wisconsin roof, photo cred AD Greenroof.
It remains unidentified...If you have a guess please contact me!

The work we do in the green roof industry is valuable on multiple levels. Not only are we bringing nature back into the built environment, but we are managing stormwater, contributing to building efficiency, and saving roof replacement costs (and products).

Clients like working with my company, AD Greenroof, because we can provide boutique designs that hit each benefit they are interested in.  In other words, if an owner stares at a gravel roof very day, and would rather look at plants that change color and texture throughout the year, we can make it happen.  If a client is mostly interested in the bottom line, with a boost of marketable stewardship, well then, we can work up the ROI that makes sense for the site.  

I also appreciate customers who share their observations on the evolving green roofs. Really, I'm talking about improving eco-system habitats! Bees, moths, butterflies, bats, birds, along with so many other insects find a home and resources throughout the year. Champions of theses roofs understand the need for periodic maintenance and plant diversity. Resilience is the key!

Enjoy national pollinator week, put some honey on your breakfast! 

Summer Shenanigans

Summer is in full force! What plans do you have for your at grade landscaping and rooftops? Do you have a regular maintenance program established for your green roof?  Are you in the installation phase of construction and in need of overburden products?

AD Greenroof has been engaging in these questions and projects hard core this year! We have also been busy creating relationships starting with lunch and learns to professional firms.  Please contact me if you'd like one for your office! We can provide AIA and ASLA learning units.

Good news on the speaker engagement, front, too! I will be presenting on storm water management of intensive green roofs over the next few months.  Take a look at our website for the upcoming conferences and register if you're interested!

I got a chance to get a penthouse view of the Target Center in Minneapolis recently. Check out the roof from this angle:

What to do on a warmer than normal spring day?

It's 70F today in Minneapolis, MN. (Date stamp: March 8!)

Over the winter, I had much time to network, work on designs, and build the maintenance programs for the year. However, today I took an extended lunch out on a patio without wearing a jacket, soaking up the sun with a colleague. We all deserve a little extra vitamin D!

Earlier this spring, we planned an event to join regional environmental organizations in a discussion on green roofs. Yes, cocktails will be served in an informal charrette style meeting! Join us for the free tour and event on March 24 in St Paul. http://eepurl.com/bTepir

We Can Do It!

Time to get creative! Halloween is this weekend, and DIY ideas have been floating social media. In a multi-symbolic decision, this year I am going as Rosie the Riveter! (Image wise, it helps that I am coming into the costume already with dark hair, a decent scarf collection, strong arms, and pearl earrings, haha).

"A Bittersweet Lion"?

Having been in business now for three years, I hear myself saying frequently, "We Can Do It!" We are free to make our own choices, only limited by the terms and conditions of the contract. Several scenarios that came to fruition this year:
"Can you provide early spring color?" Yes, we can do that by adding bulbs in the berms.
"Is it possible to have coverage immediately?" We can do that!
"Can you deliver the WBE hours needed for this grant?" Yes we can, please add us to the team!
"By the way, can you prune back these vines, even though you are here to winterize my roof?" Absolutely, we can do that, too!

As a boutique firm, we are not limited to the proprietary blends and standard plant list

that many large manufacturers supply. And yet, it is empowering to warrant a variety of designs with performance standards in mind, with a maintenance program as general or custom as needed. 

So, going back to being creative! Walking trade show floors can be a great way to see how companies are being innovative and who they partner with. Since we are now in trade show season (starting with Cities Alive in early October) I'm offering free passes! Upcoming conferences include ASLA, Greenbuild, MRCA, and AIA. I can get you free passes to them all! Just reach out to me at: angie@adgreenroof.com

Urban Growth and Habitat Preservation

Liatris blooming for bees on the Met Council's green roof in Empire, MN

Good afternoon, and Happy Fall!  Well, fall, at least according to Minnesota standards... The annual closing of the ever popular MN State Fair signals the end of summer, even if we still get to enjoy a few hot days!

I recently wrote an article for Sustainable City Network.  It's an online and printed media site that focuses on environmental topics important to planning agencies and policy makers. Their webinars have some some great information, too!

Click on my article entitled:

Striking a Balance: Urban Growth and Habitat Preservation

Plant with Purpose

We must be as busy as the bees these days! Sorry for my online absence, but in the land of 10,000+ lakes, we tend to cram as much into the growing season as possible.


As I talk to people about green roofs and land conservation, the more I hear myself saying "planting for purpose." I guess I enjoy the workhorse part of horticulture, meaning my preferences in beautiful plants stem from their ability to perform in a certain function. This could be edible fruit production, resources for pollinators, little need for maintenance, or selecting vegetation that has extensive root systems that help in eroded sites.

My selection of native perennials on green roofs (albeit limited based on soil depths) helps the pollinators who might have a hard time finding nectar and pollen in the urban environment. The grasses I choose for at grade landscape designs are ornamental, yet naturalized to the region, and growing asparagus along side them brings more diversity while keeping textural elements in the background.

This year I selected oregano and mint to be the trailing plants in the containers at my front door. I grow rainbow swiss chard and bok choy in my "ornamental" beds because it's protected just enough from the hot sun, and I can harvest at a moments notice. And, let me say that my "ornamental beds" are nothing more than columbine, bee balm, 'Karl Forester' and miscanthus grasses, black eye susan, chives, purple cone flower, a mini-blueberry shrub, and wild indigo. Nothing fancy!

For me, planting with purpose carries the weight of thinking of system goals: planting the right thing, in the right spot.

Enjoy the wild days of summer!

Target Center roof, in bloom (August)

What's happening with the Runoff?

My client asked me to check in on the data we are collecting at the Penfield Apartments in St. Paul, MN.  She was curious how the green roof was retaining storm water this year, compared to last year.
Hey, Minnesotans, remember when we had all the flooding last spring and early summer with record high rain falls? News reports highlighted that much of the problem came from runoff from impervious surfaces (roofs, parking lots, roads)- and nature had reached its carrying capacity.  I blogged about this dramatic event last year.

Take a look at how a vegetated roof can perform to alleviate the damage from stormwater runoff from impervious areas!  You can see that in a normal year (2015) green roofs designed with either 8" or 16" soil can retain almost, or all of, the rain.  However, even the extremes of 2014 spring, green roofs had already reached their saturated capacity and were only able to capture about half of the storm water.  The systems did detain the rain for several hours before runoff, however.

To get more information on this project, please visit AD Greenroof's project page .  To dive into this public data further and do you own comparisons, you can get direct access here!

You can always reach me direct: angie@adgreenroof.com

Rolling Hills

Today's blog focuses on a new installation just planted in Eden Prairie, MN.  AD Greenroof was hired to design-build the nearly 2,000 sf semi-intensive with Aulik & Assoc. Last fall, our alternate proposal came in under budget (how often can you say that in our industry?! Haha).  So, we designed some berms and permanent irrigation to make this a really robust and diverse roof. The subtle berms mimic the surrounding landscape and are planted with native forbs and naturalized spring bulbs. We partnered with an installer, Refuge Landscape, and purchased materials from Hanging Gardens.

Beautiful Course!

The client is Olympic Hills Golf Course.  They are undergoing a major renovation around their property incorporating native plantings. The addition where we installed the green roof is visible from the restaurant and patio; and will be a common backdrop during weddings. During the installation, we had many curious and excited onlookers- during rain and shine. One member commented, "Every day is like Christmas out here!"

Below are a few site photos for your viewing pleasure :)  Please contact me if you have any questions about this project or green roofs in general!  This project is also posted on our webpage!

Nice blend of succulents

Craning soil

Graded growing media

Conventional drip and pre-grown succulents

Just installed, view from the landing by the patio

Berms planted with natives in the background

What is a Virtual Summit?

Marketing departments often weigh the pros and cons of participating in trade shows.  Shows take planning (which ones are the best to reach target markets), cost money to develop a good booth, staff time, and usually travel costs.  In addition to planning, working the show, and attending, there is the follow up after.  And, what is the return on investment? How can you measure if the new relationships will lead to business? What about existing clients and getting face time with them at the show?

As we rely more on the digital world for business, trade shows face increased scrutiny from business leaders in measuring their effectiveness.  Linda Velazquez is the creative and business arm behind Greenroofs.com, our industry supported website. I was introduced to her early in my career, when I was still in MSU's grad school program, at my first green roof trade show and conference.  Several years ago she and her team launched a Virtual Summit- a low cost and travel-free alternative to attending a trade show.

This year, she asked me to prepare a presentation of my choosing, record it, and make some videos to introduce and close the presentation.  During the summit, you can watch numerous other presenters, chat with sponsors, and enter the virtual trade show to learn more about the companies.  Cool, huh? I loved the experience of preparing the presentation, learning how to record it, and using my phone and computer to video a trailer.

My presentation is called Pollinators on Parapets.  Here’s the YouTube trailer preview. To register for the 2015 Greenroofs.com Virtual Summit, just click the hyperlink. And to follow up from the summit, Linda wrote an excellent summary of the presentation in her Sky Gardens blog!

Make it Quick!

Geum in bloom

Like many people in my industry, I love this time of year.  The roofs are waking up, we get back out to the field to explore the new growth, and evaluate any problems that might have occurred over winter. Last week I was fortunate enough to get out to five local roofs to clean up organic matter, collect soil samples, and take a few snapshots of some early blooms.

This is also an ideal installation time for green roofs! AD Greenroof is working on a small installation this week in Eden Prairie, MN. Over winter we contracted by a design-build firm in town to design a green roof - this one includes irrigation, berms, Sedum and natives. I anticipate lots of pollinators will be visiting this site, too!

Native strawberries on Target Center

Last month we were part of a 5,000 sf agricultural roof installation in Chicago. It's a wonderful project with high visibility. I look forward to hearing more about the crops they grow, what is successful and how they will use it in the restaurant they are building below.

I'm keeping this post short because it is too nice today to be stuck to a computer!

Raise it up for Agriculture!

Are you thinking about a garden plan this year? We started sowing some seeds in my basement last weekend for the at grade community garden, and am completely excited about the upcoming season!

I am also excited about the increased interest in edible rooftop gardening in the Midwest.  It takes a special client's vision and the right structural loads, but the concepts of growing herbs, vegetables, and some fruits on our rooftops has become more than a dream for some!

High altitude farming offers many options to meet short and long term goals for my clients.  As we work together to complete feasibility studies, our conversations focus on the roof program. I have a client who wants to grow hops on the roof. This will provide her with a trellis structure and shade for the employees and visitors. She has talked about marketing a beer tasting that will incorporate the mature hops as part of the learning experience for the guests.  AD Greenroof has another client with somewhat limited with structural loads, so we will be planning container gardening in the areas we can have more weight, and simplify other permanent vegetated roof systems in limited dead load areas. Both clients are working to resolve the accessibility to their roofs, and can break the budget on some buildings, but it is important to get safe access for the employees and visitors.

These two examples are just the start of the larger discussions we are starting to have about the management of high altitude agriculture. Use of organic practices, cover crops, honeybees, selecting plants for products, and creating a harvesting area are just the start of some considerations as we finalize the budget. Stay tuned to see if and where these project go and grow!

Use of passive irrigation and straw bales to grow herbs and veggies

Vertical gardening?

Check out our updated website at adgreenroof.com to learn more about our services and cool projects!

A Garden Grows in January

Students periodically ask me about my job or how green roofs work. Below is an excerpt Q&A from a high school student inquiring about starting gardening club at school that I thought I'd share.

1) Why do you think that gardening is important to society?

There are many ways to describe gardening and what it means for different people. For some, they do it as a form of exercise and to be social, others enjoy the beautification of the containers and plans they put together and maintain. I take a very practical approach in that I want to grow plants for purpose- food for us, a habitat source for pollinators, and a way to mitigate the built environment.  Giving up turf grass and replacing it with plants that produce food, flavors, scents, color, and texture is very exciting and serves as a way to be self reliant.

2) What do you think the best part of a garden is?

I think the harvest is great, and educating others on the harvest is equally important. Knowing when something is ripe and how to eat it, or what the flowers are best to pick for a lasting bouquet, and how to share them with others is incredibly rewarding!

3) Is there anything else you would like to say?

Understanding where your food comes from is very important to society.  You may not personally enjoy a garden or farm, but you certainly rely on it for your meals.  Knowing what land management decisions are made by your neighbor does affect you, so knowing the basics of growing food in our ecosystem is vitally important regardless of your age. In 2001, I was interviewed by a student wondering about genetically modified foods.  My statement was the same- understand where your food comes from.  She laughed at me at the time, but has grown up to make educated choices on where to buy foods.  In our communities, we should be able to talk to the growers at farmers markets, buy food from the farms that share how they manage their crops, and choose to eat at restaurants that source local (or grow on their roofs!).

Food Roof

Gardening is fun, and you might meet some new people along the way who enjoy the same!

Winterized, but not slowing down

Today I write while listening to some rockin' holiday tunes (ha, don't judge) overlooking my green roof, dormant and buried under fresh snow. I am drinking hot tea, sweetened by some honey, produced by amazing bees whose home sits amongst a native prairie. In the midst of the winter season, we are surrounded by hints of the year's harvest. 

Milkweed

But this year's harvest was also cultivated by strengthening relationships which I observed at the annual green roof conference in November.  Most of my professional years have been in the industry, and I was once again reminded of all the colleagues I've met over the years- working on projects, building teams, sharing success stories. We work in a dynamic field which is in its infancy in comparison to some, and the variety of our professions still brings us to promote green roofs as a solution for whatever challenge a site might have. My connections are with manufacturers, growers, designers, engineers, researchers and marketers, which all bring their perspectives.
 

New prairie growing over 2 acres of building

AD Greenroof was brought on to some fantastic projects this growing season! One owner used her green roof to hide the building in the landscape.  Another wanted the roof to be designed as an amenity so they could increase occupancy rates faster than the other downtown buildings. A homeowner wanted his existing vegetated roof to have more diversity, friendly to the butterflies.  A facility manager recognized the value of ongoing, responsible management of their roof, and set aside the proper funds to pay for such services.  More designs are also in place to manage most of the storm water on site.

This is networking season, setting up time to build on partnerships, and evaluate opportunities. I look forward to sharing time with you! 

An Oasis for Monarchs in the Middle of a Corn Field

On a recent trip to Nebraska to service a new installation, I anticipated how the roof would mature in its first summer. I specified the proper soil depth to meet the native plant and succulent requirements, we added the very special mycorrhizae, the irrigation worked fairly well, and we were fortunate to have an abundance of rainfall this season. 

The building sits beyond turf grass neighborhoods, surrounded by corn fields. Driving to the building at the bottom of a hill, one cannot see it clearly as it was designed to blend into the landscape.

Once I got to the roof, my first observations included great coverage already at 60% and a nice balance of the fall grass plumes and flowering perennials. The best surprise coming from these roofs, however, was the new ecosystem we created for the butterflies and bees! These creatures found their oasis atop new construction, and quickly! I'm not talking about seeing one pollinator, we saw hundreds fluttering about! (Do you know how hard it is to photograph or video a bunch of monarchs?! Surprisingly difficult!) Did we witness a snippet of the severely declining Monarch population migrating south? Were they already living close to the site? I don't know for sure, but I'm guessing the Xerces Society will be happy to hear we have a new habitat, in a very desired place in the Mid-west!

Often times, I get caught in my daily routine working in the green roof industry, and forget that the decisions we make will impact others. Sure, there are lists of plants that attract certain insects, and I even blogged about this topic back in April, but many species are not suitable for a green roof micro-climate.  In this case, I'm proud of the consulting I provided this client, and was able to build a unique palette beyond the typical systems out there, making a huge impact on the local environment. And, it appears that nature is the real winner this time!
Contact Angie Durhman with any questions you may have about this project or blog.

Seasons Shift

There are many indicators that Fall has arrived.  School is in session, state and county fairs are wrapped up, the nights are getting cooler.  While certain parts of the country may still have some hot days in the near future, green roof plants know the days are getting shorter! 

If you have a green roof that was planted with more than just an extensive Sedum palette, you can probably see the fall asters blooming, ornamental grasses thriving, and Allium seed heads providing texture.  The photo on the right features milkweed, white snakeroot, and purple cone flower growing on a roof in Wisconsin.  

Another Fall indicator is the Living Architecture Monitor's free issue!  AD Greenroof LLC is featured on page 34.  Feel free to read it here!   www.livingarchitecturemonitor.com

It's not too late to reach out for some fall maintenance!  Email angie@adgreenroof.com

Pickin Weeds

It is certainly that time of year to talk about maintenance and efficient management of your green roof!  I visited several this week in Chicago and Minneapolis. The Target Center roof is 2.5 acres full of natives and succulents- robust this time of year!  With the regular and excessive rainfall, we haven't even turned on the irrigation on 3" soil!  The short video was shot on my phone on Friday, 7-18-14.  The video links to AD Greenroof's facebook page.  Please check it out!

The photo on the left shows some aggressiveness from Cassia on Target Center's roof.  Cassia (partridge pea) is a biennial, meaning it produces vegetated growth in year one, then in year two it flowers, sets seeds, and dies.  We have noticed increased populations and spread of this particular species across the roof over the years and try to manage it properly to keep ecosystem balance.  What about the bugs? On Friday, I was bombarded with grasshoppers, bees, some flies and even birds. Where else are they going to hang out downtown? :)

This week, I also completed some maintenance for the Met Council on their Farmington, MN waste water treatment site.  It's a lovely green roof, with some volunteer milkweed plants right in the center! The research team is starting data collection and AD Greenroof completed a plant survey earlier this year. 

Do you have a green roof and have questions regarding its care?  Please contact angie@adgreenroof.com and share some photos if you can. We look forward to hearing from you!

Rains and Roofs

Rain. Rain. Rain….well, at least in Minnesota!

In the Twin Cities, we are experiencing the wettest spring since 1891. This week alone we will exceed 12” of rain. With prolonged saturating rain events every few days since winter thaw, the Mississippi River is expected to rise seven feet in the next few days. The creeks are flooded, and after this weekend’s rain, even more streets will be closed. Some farms have already declared their crop failures for the year. And, extreme flooding up North usually means problems for the cities along the southern flow of the River.Weather factoids and jumping in puddles are fun, but this is serious business for the region that was not designed to manage this much water.

This week we held a green roof symposium designed to drive policy and promote them across the state.  Ironically, listening to the news after the event, the Minnesota Pollution Control Agency stated that excessive flooding was the cause of runoff from all the roofs and other impervious surfaces coupled with aging storm water infrastructure not able to manage the volume. Vegetated roofs can alleviate some of this!

Is this the chaotic event that is needed to drive change?

We are building a task force to make an aggressive plan to reach policy makers and work with them to create incentives for green roof construction.  Cities that are growing hundreds of roofs have programs in place already to provide rebates and grants for installations- and are starting to see the positive effects of reducing impervious surfaces. 

Contact angie@adgreenroof.com if you are interested in motivating the politicians and agencies to build vegetated roofs!