Roofs
A look at the principles of roof construction, failure and investigation - from thatch to metal roofs. Featuring the largest lead roof project in the UK and the largest zinc roof project in Europe.

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Walls
A look at the construction of various types of walls, from a stone castle in Ireland to polystyrene houses in the United States. A strong emphasis throughout on tracking down the true causes of damp, featuring many of Mike’s pioneering techniques.

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Floors and Basements
From Roman floors to basements in Venice, a look at all floor types from suspended to solid and how they fail. Includes an in-depth look at the best way to keep basements dry, with an emphasis on managing damp, rather than ‘curing’ it.

   
1. The floors of the roman empire
 
A visit to Hadrian’s wall to look at solid and suspended Roman floors
2. Blocking the flow 1
 
Timber suspended floor problems – importance of ventilation
Blocked vents – example of extreme dry rot fungus
3. Blocking the flow 2
 
Under-floor rubble
Vapour transmission
4. Lateral penetration
 
Problems when moisture from high ground levels enters the floor
5. Under pressure
 
Underfloor leaks
6. The hearth of the problem
 
Hearth slabs – no DPC
Water leaks against hearth appearing as rising damp
7. Battens and boards
 
Underfloor leaks
8. Solid suspended floors
 
Carbonation of concrete
9. Hong Kong restoration
 
Two case studies from Hong Kong of concrete carbonation and a raised solid floor
10. Measuring damp in solid floors
 
Using a hydrostick in a humidity box
Importance of equilibrium relative humidity
11. When is a floor a roof?
 
Case study of a floor slab which became an exterior walkway over a basement
12. Solid floors - Case 1
 
Failure of floor slab leading to condensation
13. Solid floors – Case 2
 
New concrete floor suffers from high ground levels
Fundamental problems with fitting concrete floors
Replacing solid floors with suspended floors
14. Going underground
 
Building basements
BS8102 – guidance on water tables
How not to waterproof a basement – case study
15. Management options
 
Brief overview of options for waterproofing below-ground
Cementitious systems
Ashphaltic systems
Bund walls
Drained cavity wall systems
16. Drained cavity close-up
 
In-depth look at drained cavity wall systems in action
Interview with Brian Davison – Director, Delta Membrane Systems Ltd.
17. The Crypt of San Marco
 
Venice - The Crypt of San Marco Basilica
Attempts to preserve basement crypt below water level
Interview with Architect Ettore Vio
Bonus Section
 
The Psychrometric Chart
   
 
       
   

Flooding
Floods are a force of nature and therefore cannot be entirely avoided. But they can be mitigated against and their passing needs to be dealt with in a timely and effective manner. How do we know when a house is truly dry? And why are floods becoming an increasing problem? Examples from recently flood-struck Carlisle and the canals of Venice shed light on these questions.

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Drainage and Services
Drains are a hidden world. How can you find out whether drains or water supplies are leaking? Where are they? Who is responsible for them? How can they be repaired? This programme delves into this hidden world and brings back the answers.

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Law and Litigation Programme
What are the precedents that govern liability in cases of building failure? What are the relevant cases? What will surveyors be asked in court? What evidence is required? This programme covers all current pertinent legislation and features a dramatised re-enactment of the landmark case on the use of building pathology evidence in court.

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