1. Site Based Preconstruction - Demolition
Brownfield Sites = sites that have been built on before.
These are often old factory and industrial areas as well as inner city residential areas that are to be redeveloped
Greenfield Sites = sites that have not been built on before.

2. Demolition and Clearance of Existing Structures
Where there are existing buildings which need to be cleared before building can take place, a programme of Demolition is needed.
Demolition can be manual, use machines or involve explosives.

3. Sustainable Demolition
Recycling Construction waste
Sustainable Demolition means that material from demolished buildings cannot just go to landfill sites. It must be recycled/Reused in some way.
These slides are from the building company Carillion and their demolition of a Scottish prison.

4. Imagine the number of materials that are in a building?
How do you extract them? – see link
What can they be used for?
Metals
Plastics
Timber
Hazardous waste - Asbestos
Why Sustainable demolition?
To meet legislation requirements ▪    Reduce waste disposal and its costs ▪    Maximise resources available ▪    Improving resources efficiency ▪    Reduce landfill  ▪    Better use of materials

5. Sustainable demolition should benefit the environment, and the local community.
What can be recycled?
All crushed reinforced concrete Mechanical and electrical plant All soft strip fixtures and fittings having a reclaim value such as doors, wood floors, wood panelling, sanitary ware, light switches,  socket outlets,radiators, installed facilities such as kitchens, etc ▪    Office furniture and associated fixtures and fittings ▪    Structural timber ▪    Light fittings ▪    Bricks, slates and tiles ▪    Salvageable materials

6. Tree Removal
Many greenfield sites may have trees which need to be removed before construction can take place. Trees are usually subject to extensive legislation I order to protect them and damaging/removing them without permission can lead to very large fines.
Tree Preservation Orders, Conservation Areas, Planning Conditions, Felling Licences or Restrictive Covenants legally protects many trees in the UK. Anyone wishing to undertake work to a tree should make suitable enquiries as to the legal status of the tree and any protection afforded to it, before undertaking any work, in order to protect themselves and others from possible prosecutions or enforcement action
Stump Grinding

7. Tree Preservation Orders (TPOs)
Sites of Special Scientific Interest (SSSI)
TPOs are administered by Local Planning Authorities (LPA) (e.g. a borough, district or unitary council or a national park authority) and are made to protect trees that bring significant amenity benefit to the local area. This protection is particularly important where trees are under threat.
Restrictive Covenants
A restrictive covenant is a promise by one person to another, (such as a buyer of land and a seller) not to do certain things with the land or property. It binds the land and not an individual owner, it "runs with the land". This means that the restrictive covenant continues over the land or property even when the current owner(s) sells it to another person. Restrictive covenants continue to have effect even though they may have been made many years ago and appear to be obsolete.
Conservation Areas
But if a tree in a conservation area is not covered by a TPO, you have to give written notice to the LPA (by letter, or on the LPA’s form) of any proposed work, describing what you want to do, at least six weeks before the work starts. This is called a ‘section 211 notice’ and it gives the LPA an opportunity to consider protecting the tree with a TPO.
Felling Licences
Felling Licences are administered by the Forestry Commission. You do not need a licence to fell trees in gardens.

8. Site Clearance
All sites need to be cleared of vegetation before construction can begin. The Groundworks team would be responsible for this.

9. 1. Explain why demolition is important in the construction industry.
2. Explain the difference between a brownfield site and a greenfield site.
3. What does the term Sustainability mean?
4. Explain Sustainable Demolition

10. 5. What types of materials can be recycled following the demolition of a building?
6. Describe three ways that trees are protected from construction activities.