REDUCE ELECTRICITY CONSUMPTION: FREE WHITE PAPER

Since Petersen Aluminum’s introduction of the PAC Solar Series last year, there have been countless inquiries about Solar Photovoltaics (PV), the latest solar technology combining metal roofing and solar energy.  Recognizing the efforts of their customers to understand the new technology, Petersen Aluminum commissioned Scott Kriner, an industry expert, to research and prepare a white paper presenting cost comparisons of Solar PV Technologies, the science behind the concept, synergy with Metal Roofing, incentives and much more. Photovoltaic materials produce electricity with no moving parts, and without consuming any fossil fuels. It presents particularly attractive features to building owners who are looking to reduce electricity consumption.  Photovoltaics are one of the clean renewable energy sources that the world is developing with great interest.  Visit http://pacgreeninfo.com/pacsolarseries.html to download the new white paper or visit us at METALCON, Booth 824.

Roofing Estimating Tips

Dampproofing & Waterproofing
Be sure of the job specifications before pricing the subdivision. The difference in cost between waterproofing and dampproofing can be great. Waterproofing will hold back standing water. Dampproofing prevents the transmission of water vapor.
 
Thermal Protection
Insulation and fireproofing are measured by area, thickness, volume or R-value. Specifications may give only what the specific R-value should be in a certain situation. The estimator may need to choose the type of insulation to meet the R-value.

Roofing and Siding Panels
Many roofing and siding products are bought and sold by the square. One square is equal to an area the measures 100 square feet. This simple change in unit of measure could create a large error if the estimator is not observant. Accessories necessary for a complete installation must be figured into any calculations for both material and labor.

Membrane Roofing, Flashing, and Roofing Accessories
Built-up of single-ply membrane roofing systems are made up of many products and installation trades. Wood blocking at roof perimeters or penetrations, parapet coverings, reglets, roof drains, gutters, downspouts, sheet metal flashing, skylights, smoke vents, and roof hatches all need to be considered along with the roofing material. Several different installation trades will need to work together on the roofing system. Inherent difficulties in the scheduling and coordination of various trades must be accounted for when estimating labor costs.

Joint Protection
To complete the weather-tight shell, the sealants and caulkings must be estimated. Where different materials meet—at expansion joints, at flashing penetrations, and at hundreds of other locations throughout a construction project—they provide another line of defense against water penetration. Often, an entire system is based on the proper location and placement of sealants and caulkings. The detailed drawings that are included as part of a set of architectural plans show typical locations for these materials. Be careful to keep different types of sealants separate, and remember to consider backer rods and primers id necessary.

Excerpted from RSMeans Building Construction Cost Data 2010. Now available!