Green Can Mean a Lot of Things


X_0352 What it Means to Crescent Rim Homeowners

Clark Development has established a reputation for its environmentally responsible approach in its projects. Crescent Rim is creating a new benchmark in Idaho for eco-friendly, multifamily development. Our green building philosophy focuses on three primary objectives: Health Benefits

  • Low VOC paints and adhesives
  • Near hospital-grade air filtration in the heat-pump sytems

Energy Savings

  • Windows use “E-cubed”glass for an estimated 40% saving on hearing and cooling costs
  • ENERGY STAR® appliances
  • The domestic heating/cooling system exceeds energy code requirements by over 40%

Environmental Responsibility

  • Comprehensive recycling program
  • Recycled materials throughout

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Creating a Quiet Environment for Crescent Rim Homeowners

A primary goal in designing and constructing Crescent Rim was to create a quiet and peaceful living environment. From the outset, we engaged an acoustical engineer with a strong background in multifamily construction to work with our designers and engineers at every step. As you walk around Crescent Rim and go into individual residences, hear for yourself the quietness and how it compares to what you might expect or have experienced elsewhere. The serenity is also reflective of the classic design and quiet lifestyle of Crescent Rim. You may not be able to experience what it is like, from a sound environment perspective, to have neighbors above, below, and beside you unless you are already living in Crescent Rim or have an acquaintance who lives here. As with noise from the outside, there are many techniques that have been used to reduce potential noise transmission inside the building. Some of the techniques we have employed:

  • Walls between corridors and residences and from one residence to another are double-wall construction with “resilient sound channels”, acoustical insulation and two layers of 5/8” sheetrock on both walls. Ceilings have a “resilient sound channel” strip plus two layers of 5/8” sheetrock, plus sound batt insulation to reduce noise moving vertically between residences. Can lights in the ceilings are installed in sound isolation boxes.
  • All floors above the first have a layer acoustical sound mat and 1.5” of lightweight concrete on top. The primary purpose of the sound mat is to reduce “impact noise” such as that coming from the heels of shoes. When installing sheetrock, caulking materials that reduce the transmission of noise and vibrations were placed where the sheetrock touches the ceilings and space is left at the floor level for the sound mat to be installed.
  • Metal ductwork is attached with neoprene gaskets to reduce sound transmission from the metal to surrounding walls and ceilings. A special adhesive is used to seal the joints of ductwork, rather than duct tape that can loosen over time. The ducts are installed in dropped ceilings and soffits below the primary ceiling in order to reduce sound transmission to residences above and below.
  • Waste lines are made of cast iron rather than plastic, reducing noise coming from wastewater movement through the building.
  • Water, waste, and fluid lines moving through penetrations of the building and within units are given special insulation or caulking treatment to reduce sound transmission to the structure and nearby space.
  • The elevator and trash chute have been engineered and constructed with special materials and techniques that help reduce noise transmission to the surrounding structure.
  • The individual residences use heat pump systems to provide warming and cooling within the unit. These pumps were specifically selected because of the quiet performance ratings, even though they were one of the most expensive options. In addition, by using a central boiler and chiller located in the parking garage, Crescent Rim is able to avoid the noise associated with conventional air conditioners and furnaces located within the units, instead using the quieter heat pump system.

Although it was relatively easy to incorporate these various elements in the design and engineering of Crescent Rim, we could not leave these relatively new concepts to chance. As a result, we hired a third-party inspection firm to check and confirm that our design and engineering concepts were being executed correctly. La Jolla Pacific, a firm based in California, has many years of experience dealing with condominium developments, and they were our choice to handle the inspection process. Additionally, our acoustical engineer, based in Seattle, participated as construction proceeded. Everyone knew that we were serious about doing the job right and creating a quiet environment and lifestyle for our residents.