Building pathology SOE

Question 1

Can you name some common defects across various ages of construction

Answer 1

Georgian (1700)
- leaning chimneys
- damp pentration in chimeny stacks

Victorian (1800) : failed or lack of DPC
- poor ventilation to floor voids
- damp pentration
- lead pipework

Edwardian (1900)
- wall tie failure
- nail sickness (ferrous nails corroded)

60/70s
- Abetsos
- wood wool slabs
- concrete defects ?

Question 2

what are the testing methods for damp - adv and dis

Answer 2

• Visula
• protemeter - calbrated for timber - conversion for bricwork - foil back
• Drill-Core Analysis = wet weight - dry weight
• professional salt anyalisis: In addition to moisture measurements, salt measurements can give building professionals important information about the origin and type of moisture. Salts are hard, crystalline materials, which can temporarily be dissolved and carried into the masonry by water.

Thermal imaging cameras

Question 3

what are the level of cracks in BRE 251

Answer 3

0 - Hairline crack less than 0.1mm
1 - fine crack - up to 1mm
2 - up to 5mm
3 - 5-15mm
4 - extensive damage - 15-25mm
5 - 25mm+ structural damage

0,1,2 = ASESTHIC CRACKS = Redecorations

3,4 = servicability

5 = stability

Question 4

malbank school what was the underlaying felt

Answer 4

breathable membrane

Question 5

what were the headlines if malbank report

Question 6

what nails did you specify and way

Answer 6

cooper is resistant to corrosion

Question 7

when would advise on replacement of the metal sheet of the landed estate condition survey

Answer 7

when the corrosion has reached the fittings

Question 8

what is the requirement for flashing upstands

Answer 8

150 mmm with laps of 100mm

Question 9

what was the build-up of the pitched roof

Answer 9

Reinstated slates
roof battens
Breathable mebrane
Roof joists,
insulation between the rafters (mineral - figure out way - sustainable and and be cut , fire resistant and water resistant )
VCL
plasterboard