CSC CPD REVISION Flashcards
The two Primary Strategic Objectives for Product Evaluation & Selection are …
“What is required.
What is available. “
What are the 4 Methods for Water Penetration Control?
1 Mass
(Traditional, solid wall assemblies that shed most surface water & absorb the rest then release absorbed moisture as a vapour (Solid concrete, masonry and timber)
2 Barrier
3 Internal drainage plane
4 Rainscreen
Walls constructed as a moisture-management system incorporating :
cladding
air cavity
drainage plane
airtight support wall
to offer multiple moisture-shedding pathways, and diminish the forces attempting to drive moisture into the wall.
(Brick veneer cavity walls, furred-out clapboard walls and drainable EIFS walls. )
Rainscreen
Wall designed to shed all surface water with no moisture penetration ( EIFS, stucco, clapboard and curtain walls)
Barrier wall
Air flows into the cavity behind the exterior cladding, equalizing the cavity pressure with the wind pressure, and thus minimizing the force (wind pressure) that causes most rain penetration.
Pressure-equalized rainscreens (PER)
A property of a material that opposes the passage of heat through it.
Thermal resistance
A measure of the effectiveness of the insulating material.
The larger the value, the better.
RSI
Principal function is to prevent:
Infiltration of outdoor air into a building
Exfiltration of indoor air to the outside
Air Barrier
A term describing a special class of materials that offer a high resistance to the flow of water vapour.
Vapour Barrier
What are the 3 causes for Damp Walls ?
Air leakage through walls or roof construction to exterior.
Condensation on the wall surface or within the wall.
The presence of hygroscopic salts in cementitious materials.
A special building papers, membranes or coatings - used to separate an environment that is at a higher vapour pressure from an adjacent one at a lower vapour pressure.
Vapour retarders
Wall construction includes a drainage plane or moisture barrier located between the exterior cladding and the supporting wall that provides redundancy of moisture resistance.
(Stucco and clapboard walls)
Internal drainage plane
The sum established by an owner as available for construction of a
project, including contingencies for cost increases during construction.
Construction budget
A reliable cost/time evaluation of an item or project both in part and in total, both
present and life cycle. Estimate
Estimate
The sum established by an owner as available for an entire project including
such things as construction budget, professional fees, cost of land, rights of way, furnishings, equipment, financing and all other costs for a project.
Project budget
A bill of quantities or a detailed listing and quantities of all items of material
and equipment necessary to construct a project.
Quantity survey
WHO IS RESPONSIBLE FOR THE ESTIMATE?
The owner - the consultant - the estimator - the contractor
Sometimes called “ballpark” estimates, they are based on historical costs related to a specific unit, ±20% accuracy
Order of Magnitude Estimates
A method of estimate used when the schematic design drawings indicate the sizes and areas of the spaces and the overall facility, ±15% accuracy
ft2 or m2 and ft3 or m3 Estimates
These types of estimates are based on sizes of the spaces and the
systems and elements used for the building. Because systems are generally quite well
described this method can be as much as 100% accurate.
Systems Estimates