Case Study

Question 1

You mention PCI document. Who prepared this and what was included?

Answer 1

I assisted the PD in preparing the document, with the PDs review and sign off before issue.

Question 2

What is code 4 lead flashing?

Answer 2

Thickness of 1.80 mm and Weight of 20.4 kg/m2

Question 3

What determines coding?

Answer 3

Thickness and kg/m2

Question 4

Can you tell me about the construction type of the building?

Answer 4

• Solid masonry construction, cobimation of flemish brickwork and portland stone
• Masard roof with natural slate to pitches and a flat topped roof section with a sinle-ply membrane

Question 5

How have you determined traditional brickwork masonry over steel frame with masonry cladding?

Answer 5

• Thickness more than 250mm
• Brick bond - which was flemish in this case.

Question 6

How are the Portland stone architecural features secured into the main structure of the building?

Answer 6

• Direct attachment
• Strongback systems
• Mortar and Pointing

Question 7

Did you carry out an Asbestos survey, and what were the results?

Answer 7

• Yes, there was no asbestos detected.

Question 8

What regulation would you refer to when concerning asbestos?

Answer 8

• Control of Asbestos Regulation 2012 (CAR 2012).

Question 9

Did you aquire any guarantees during the project?

Answer 9

• Yes, FLEXITEC 2020 MATERIALS provided a guarantee for 20 years covering an area of 122m2.

Question 10

How was the waterproof system applied?

Answer 10

• Dark grey texture applied coating over light greay liquid coating on 18mm board on 150mm

Question 11

What assessment was required for the roof waterproofing?

Answer 11

European Technical Assessment for applied roof waterproofing kits provided by a member of EOTA.

Question 12

What report was aquired for the roof waterproofing?

Answer 12

BRE Global Classification Report

Question 13

What is the BRE Global Classification Report?

Answer 13

Classification report for roof/roof coverings exposed to external fire in accordance with EN 13501-5: 2005 + A1: 2009

Question 14

What was the BRE Global Classification Report used for?

Answer 14

Defines the classification assigned to roof/roof covering Flexitec 2020 on 9mm Masterboard calcium silicate base in accordance with EN 13501-5: 2005 + A1: 2009

Question 15

What system was used for waterproofing?

Answer 15

• Felxitec 2020.

Question 16

What marking signifies a decleration of performance?

Answer 16

C E

Question 17

What is the buildup of the Flexitec System?

Answer 17

• 18mm OSB Board
• Black flexible plastic VCL (0.23 mm)
• 150mm off white insulation foam with silver foil
• Dark grey textured liquid applied coating over light grey liquid coating
• Mechanically fixed with screws.

Question 18

How would you intall the Flexitec System?

Answer 18

• Prepared roof surface
• Flexitec Primer
• 1st coat Flexitec Resin with 225g/m2 Restec Fibreglass CSM reinforement
• 2nd Coat Flexitec Resin

Question 19

What fire rating does the Flexitec System acheive?

Answer 19

• Fire Reating: BRoof (t4) highest rating a flat roof system can acheive

Question 20

What roof finishes can a Flexitec System be applied to?

Answer 20

Most, including felt, asphalt, concrete, GRP, PVC single ply.

Question 21

What are the benefits of using the Flexitec System?

Answer 21

• Can be installed on most coverings
• Seamless
• Installed on any shape and sized roof
• Waterproof
• Rapid installation
• Drying time of up to 60 minutes
• Suitible application for tempratures ranging from 1 degrees to 30 degrees.

Question 22

What is ISO?

Answer 22

• International Organisation for Standardisaiton

Question 23

What ISO does the Fleixitec system satisfy?

Answer 23

• ISO 9001: Quality Management Systems
• ISO 14001: Environmental Management Systems

Question 24

What was the process of stitch-cracking?

Answer 24

• The instlallation of ‘HeliBar’ which is a stainless steel reinforing bar used for masonry repair.

Question 25

Did you have a CCTV Drainage Survey and what was the outcome?

Answer 25

- No major defects, however, a small hole was identified 0.5m down the drain.

Question 26

What type of lime was used for masonry repiars?

Answer 26

Saint-Astier

Question 27

What was the lime/sand ratio for restoring stonework?

Answer 27

1 lime : 2 sand (0/3mm)

Question 28

What was used for the ballustrade/downpipe paint finishes?

Answer 28

Dulux Trade Metalshield Primer followed by 2 coats of Dulux Trade Metalshield Gloss.

Question 29

How can you tell whether a scaffolding company is reliable?

Answer 29

National Access & Scaffolding Confederation (NASC) Approved

Question 30

Who deisgned the scaffolding?

Answer 30

A Civil Engineer.

Question 31

Could you talk me through how you specified repairs to stone features?

Answer 31

- Included provisional quanities - Case Studies - Stone Mason advice - Coservation officer advice

Question 32

Was conservation consent was required for the actual remedial works?

Answer 32

As the property is not listed, it did not require consent.

Question 33

Can you talk me through how you would deal with an interim valuation application?

Answer 33

- Interim Valuation Date (IVD): This is the date upon which the valuation of the work done is made. - Due Date: This is 7 days after the Interim Valuation Date (IVD). - Final Date for Payment: This is 14 days after the Due Date, or 21 days after the IVD. - Payment Notice from Employer: The Employer must issue a payment notice within 5 days of the Due Date. - Pay Less Notice from Employer: The Employer must issue a Pay Less Notice no later than 5 days before the Final Date for Payment.

Question 34

Can you talk me through how you went about the practical completion process?

Answer 34

- Carry out inspection - Confirm Final Account - Provide Certificate of PC - Release 2.5% retention - Compile H&S File and provide to LL

Question 35

Was there any paperwork that the contractor needed to provide to you as part of your determination as to whether PC had been completed?

Answer 35

Operations and Maintenance Manuals

Question 36

What British Standard would you refer to for lead flashings?

Answer 36

BS EN 12588 (1999)

Question 37

What is code 3 lead flashing?

Answer 37

Thickness of 1.32 mm and Weight of 15 kg/m2

Question 38

What should service charges be?

Answer 38

Not for profit, not for loss.

Question 39

What are the risks associated with removing chimney breasts?

Answer 39

- Expensive and time consuming - Requre building control approval - Input of structural engineer - Does the chimeny form part of a party wall?

Question 40

Why remove chimney breast?

Answer 40

- Chimneys cause damp issues trough uncapped flues - Poor pointing/lack of flaunching - Carbon staining due to water reacting with carbon staining within the chimney.

Question 41

How to avoid defecs without removing?

Answer 41

- Introduce ventilation

Question 42

Is planning required for the removal of chimney breasts?

Answer 42

- Typically no, as it comes under permitted developments

Question 43

What measurement must a drainage outlet size be, and what would you refer to?

Answer 43

- 90mm - BS EN 12056-3

Question 44

Why is lime used?

Answer 44

- Good water vapor permeability - Flexible under stress - Cement is brittle and prone to cracking

Question 45

What is the lime ratio for the mortar?

Answer 45

1 (lime) : 3 (sand/sharp)

Question 46

What would you refer to when specifying stone repairs?

Answer 46

- Conservation Basics (English Heritage) - BRE 420 : Selecting and Testing Natural Stones - BRE 21 : Weathering, Preservation and Maintanance of natural stone masonry.

Question 47

How would you test stone repairs?

Answer 47

- Visual inspection Whether it's real? - Easily scratched - Acid test looking for fizzing, which indicates Calcium Carbonate.