Flat roofs for low rise residential property – construction and detailing Flashcards
When considering the design of any structure, the Loz it should be able to take are categorised as:
Dead loads
Imposed Loads
Wind loads
Unsupported span of roof diagram
Currently used roof deck materials include:
Vapour barrier or vapour control layer prevent most reaching cold surface.
Diagram
Ways to prevent condensation include:
Types of insulation that can be used in flat roofs:
The amount that the structure heats up will depend upon a couple of factors, these being:
1) Specific heat capacity
The amount of the structure heats up depending on a couple of factors, these being:
2) Thermal mass
Thermal movement, expansion and contraction example diagram:
To remember:
- All the materials expand and contract by significant amount, very frequently
– the building design must allow for this movement
- buildings or elements that don’t allow for the movement will experience early failure
As a flat roof is a thermal element, provisions of the building regulations and associated approved documents will be applicable which could include:
Cold flat roof construction diagram:
Advantages and disadvantages of a cold roof include:
Warm flat roof construction diagram:
Advantages and disadvantages of warm roof include:
Inverted or upsidedown roof construction diagram:
Advantages and disadvantages of an inverted roof include:
Advantages and disadvantages of bitumen roof finishes include:
Advantages and disadvantages of asphalt roof finishes include:
Advantages and disadvantages of single ply roof finishes include:
Advantages and disadvantages of GRP roof finishes include:
Advantages and disadvantages of metal roof finishes include:
Cover flashing to a felt roof up stand diagram:
