Roofing System Flashcards
Types of Roof System
- Low Mass Roofing System
- High Mass Roofing System
High mass roof system include:
- Earth-Covered Construction
- Green Roofing
Low mass roofing system include:
Tile Roofing
Metal Sheet Roofing
Structural Insulated Panel Roofing (SIP)
- provides sufficient thermal lag to moderate season cycles
- require no maintenence to the roof and very durable
- have high site disturbance during construction but minimal on completion
- have high embodied energy and high cost
-eliminates roof area so any rainwater collection is limited to out-buildings.
Earth-Covered Construction
- uses a lightweight manufactured materials as a medium to grow plants
- thermal mass is generally inaccessible due to thr structure, and insulation is medium to high and provided by conventional insulation rather than the covering.
- have medium to high embodied energy, depending on support structures.
- environment benefits include food production, inccreased ecological habitat and biodoversity, reduction of heat island over built-up areas, air quality improvment and on-site stormwater detention.
- low to medium maintenance
Green roofs
This have slightly lower energy than teracotta. They require more structural support than lightweight materials and can add to heat gain h less well insulated, because they are external, uninsulated mass.
Tile Roofing
This has high embodied energy per kilogram, but because it is thin, the embodied energy is low per sqm.
Metal sheeting
These typically are made with 2 skins of pre-coated thin steel 0.42mm thick for the profile rolled for added rigidity. They are an efficient use of the embodied energy in steel as they have high insulation values.
Structural Insulated Panel (SIP)