Trees on Buildings: A Tree Selection Framework Based on Industry Best Practice
- A four-stage tree selection framework is proposed to increase implementation success;
- Planting strategies, microclimate analysis and maintenance planning are essential for success;
- Soil volume selection should be evidence-based and suitable for trees at maturity;
- A balance between exotic and native species in green roof settings at the city scale is needed.
2. Literature Review
2.1. Site Considerations
2.2. Planter and Substrate Settings
2.3. Tree Selection Considerations
- The context of planting
- The adaptability of the selected trees to the conditions in urban paved sites
- The availability of the trees locally and testing of trees in similar environments
- Consulting local planting specialists and specifying site types and conditions
- Extend the selection to the full range of tree species suitable to the climatic region
2.4. Wind Load
2.5. Policy Review
3.1. Study Design
- The first section of the survey included closed-ended questions concerning the background of the experts (discipline, geographic location, role in the design, and implementation process) to classify the results of the study in the context of expert knowledge of tree selection and implementation on buildings.
- The second section of the survey consisted of open-ended questions focusing on the tree selection process and the implementation requirements for trees on buildings. It also investigated:
- The designs and construction requirements of trees on buildings;
- The process of preparation;
- The barriers;
- The existing policies;
- The current techniques and risks;
- The areas of improvement;
- The required knowledge;
- Follow-up semi-structured interviews were conducted with those experts who expressed an interest in providing more information through the survey. The aim was to expand upon the themes presented in the survey questions in richer detail.
3.2. Data Collection
3.3. Data Analysis Protocol
4.1. Purpose of Installing Trees
4.1.1. Environmental Considerations
4.1.2. Building Design Considerations
4.1.3. Thermal Considerations
4.2. Existing and Predicted Conditions of the Tree Context
4.2.1. Microclimate Considerations
4.2.2. Planter Design and Location
4.2.3. Planting Strategy
4.3. Risk Evaluation
4.3.1. Risk of Failure
4.3.2. Risk of Root Damage
4.4. Characteristics of Candidate Trees
4.4.1. Size and Form Considerations
4.4.2. Growth Considerations
4.4.3. Maintenance Considerations
5.1. Tree Selection Framework for Implementation on Buildings
- Identifying the purpose of the tree;
- Analysing the site conditions;
- Evaluating the implementation risks;
- Investigating the characteristics of the candidate trees.
5.2. Policy Considerations
5.3. Limitations and Future Studies
Data Availability Statement
Conflicts of Interest
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|Theme||Number of Participants||Number of References|
|Enhance the environment||61||121|
|Enhance building aesthetics||37||66|
|Enhance air quality||32||36|
|Enhance building users’ health||20||37|
|Increase building energy efficiency||18||33|
|Enhance users’ lifestyle||18||33|
|Enhance the thermal comfort||13||22|
|Increase roof usage||14||23|
|Increase building financial value||11||19|
|Climate change mitigation||12||19|
|Increase the biodiversity||9||14|
|Increase the shade on the roof||8||13|
|Stormwater delay and water harvesting||6||9|
|Increase building sustainability||6||6|
|Decision influencing factors|
|Trees selection and planting||33||67|
|Location and Cross shading||10||18|
|Survival and establishment||9||19|
|Wind and storms||29||59|
|Weight and building structure||25||45|
|Wind and storms resilience||7||10|
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Abuseif, M.; Dupre, K.; Michael, R.N. Trees on Buildings: A Tree Selection Framework Based on Industry Best Practice. Land 2023, 12, 97. https://doi.org/10.3390/land12010097
Abuseif M, Dupre K, Michael RN. Trees on Buildings: A Tree Selection Framework Based on Industry Best Practice. Land. 2023; 12(1):97. https://doi.org/10.3390/land12010097Chicago/Turabian Style
Abuseif, Majed, Karine Dupre, and Ruby N. Michael. 2023. "Trees on Buildings: A Tree Selection Framework Based on Industry Best Practice" Land 12, no. 1: 97. https://doi.org/10.3390/land12010097