Dr Martin Dobson

Types of investigation and their Types of investigation and their interpretation interpretation

Part 1Part 1

InvestigationsInvestigations

1.Site geology 2. Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge)

4. Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6. Trial pits (foundation depth)

7. Drain survey

InvestigationsInvestigations

1. Site geology

2.Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge)

4. Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6. Trial pits (foundation depth)

7. Drain survey

InvestigationsInvestigations

1. Site geology 2. Crack pattern description and interpretation

3.Time of development of damage (autumn claims surge)

4. Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6. Trial pits (foundation depth)

7. Drain survey

InvestigationsInvestigations

1. Site geology 2. Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge)

4.Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6. Trial pits (foundation depth)

7. Drain survey

InvestigationsInvestigations

1. Site geology 2. Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge) 4. Tree/shrub information (past and present growth rate)

5.Root identification including DNA testing

6. Trial pits (foundation depth)

7. Drain survey

InvestigationsInvestigations

1. Site geology 2. Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge) 4. Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6.Trial pits (foundation depth) 7. Drain survey

InvestigationsInvestigations

1. Site geology 2. Crack pattern description and interpretation

3. Time of development of damage (autumn claims surge) 4. Tree/shrub information (past and present growth rate)

5. Root identification including DNA testing

6. Trial pits (foundation depth)

7.Drain survey

http://maps.bgs.ac.uk/geologyviewer_google/googleviewer.html

http://www.bgs.ac.uk

1. Site geology1. Site geology

2. Crack pattern description and 2. Crack pattern description and interpretationinterpretation

Typical damageTypical damage•Small, usually diagonal, cracks which suddenly appear indoors in plaster work and outside in brickwork or render.

•Cracks occur at weak points, such as around doors and windows

•Cracks usually become noticeable in late summer.

•The cracks will normally be wider at the top.

•Doors and windows may also “stick” due to the distortion of the building.

Basingstoke Road, Reading

3. Timing of damage3. Timing of damage

4. Tree/shrub information 4. Tree/shrub information (past and present growth rate) (past and present growth rate)

1. Measured survey

2. Species of tree/shrub

3. Water demand

4. Age (increment core)

5. Height/crown spread

6. History of management

5. Root identification including DNA testing5. Root identification including DNA testing

5. Root identification including DNA testing5. Root identification including DNA testing

5. Root identification including DNA testing5. Root identification including DNA testing

DNA fingerprintingDNA fingerprinting

Very small rootsVery small roots To distinguish between To distinguish between

trees of the same trees of the same speciesspecies

To distinguish trees of To distinguish trees of different clonesdifferent clones

6. Trial pits (foundation depth)6. Trial pits (foundation depth)

6. Trial pits (foundation depth)6. Trial pits (foundation depth)

830 mm

7. Drain survey (CCTV)7. Drain survey (CCTV)