P7 Barton
UNIT 6. BUILDING TECHNOLOGY IN CONSTRUCTION
MR. BARTON
P7- Explain the implications of environmental issues and legislative constraints on building construction
Today’s Designers, Architects and Constructors have a duty of care to strive to produce energy efficient and energy saving buildings. Where possible the sustainability of resources / materials and techniques must be a primary concern in the decision making process.
Environmental issues in relation to construction
Heavyweight construction
Solid brick or stone walls let up to twice as much heat escape as a cavity wall. The fundamental principle of a cavity wall is to prevent moisture moving from outside to inside. A cavity wall consists of two separated walls or ‘leaves’ joined by rust proof wall ties. This allows the exclusion of dampness and the prevention of heat loss by incorporating insulation.
Moisture will penetrate masonry walls where hairline cracks exist between masonry unit and mortar. Water which runs down the exterior wall surface will be drawn towards the inner cavity due to wind pressure exerted on the exterior of the wall and the negative pressure present within the cavity.
Providing a clean air space will allow this moisture to flow unobstructed down the cavity face of the outer leaf. Flashing, installed at recommended locations will then divert this moisture back to the building 's exterior through weep holes. Proper drainage of moisture will reduce the chance of efflorescence and freeze-thaw damage.
Timber framed construction
Timber Frame construction is a method of building that relies on a timber frame as a basic means of structural support. The majority of structural timber used in Ireland comes from managed forests and is a renewable and sustainable material. The growing of timber benefits the environment, and its harvesting, production and transport are seen to produce less CO2 than other construction materials such as concrete and steel. The environmental
MR. BARTON
P7- Explain the implications of environmental issues and legislative constraints on building construction
Today’s Designers, Architects and Constructors have a duty of care to strive to produce energy efficient and energy saving buildings. Where possible the sustainability of resources / materials and techniques must be a primary concern in the decision making process.
Environmental issues in relation to construction
Heavyweight construction
Solid brick or stone walls let up to twice as much heat escape as a cavity wall. The fundamental principle of a cavity wall is to prevent moisture moving from outside to inside. A cavity wall consists of two separated walls or ‘leaves’ joined by rust proof wall ties. This allows the exclusion of dampness and the prevention of heat loss by incorporating insulation.
Moisture will penetrate masonry walls where hairline cracks exist between masonry unit and mortar. Water which runs down the exterior wall surface will be drawn towards the inner cavity due to wind pressure exerted on the exterior of the wall and the negative pressure present within the cavity.
Providing a clean air space will allow this moisture to flow unobstructed down the cavity face of the outer leaf. Flashing, installed at recommended locations will then divert this moisture back to the building 's exterior through weep holes. Proper drainage of moisture will reduce the chance of efflorescence and freeze-thaw damage.
Timber framed construction
Timber Frame construction is a method of building that relies on a timber frame as a basic means of structural support. The majority of structural timber used in Ireland comes from managed forests and is a renewable and sustainable material. The growing of timber benefits the environment, and its harvesting, production and transport are seen to produce less CO2 than other construction materials such as concrete and steel. The environmental