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Title: Mid-winter installation of protected membrane roofs in Alaska
Authors: Aamot, H. W. C. (Haldor W. C.)
Keywords: Alaska
Cold weather construction
Membrane roofs
Thermal properties
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 77-21.
Description: CRREL Report
Abstract: Cold weather limits the successful application of built-up roofing, but often a roof installation must be completed late in the fall or in the winter. The loose-laid protected membrane roof with a synthetic sheet membrane can be installed in the middle of the winter with complete reliability. A synthetic membrane is traditionally more expensive than built-up roofing (rising crude oil prices, however, have reversed this condition), but it has two special features besides its suitability for winter installation: it can be placed on a damp deck, if necessary, and, being looselaid, it does not split because of deck movement. This report documents information on the installation of two roofs in Anchorage, Alaska, during January and February 1972, including a discussion of the necessary snow removal from the bare deck and the use of portable shelters for preparing the lap joints between sheets during very cold weather. The winter installation caused no special construction problems and the advantages of the synthetic membrane make it an attractive alternative to built-up roofing. The cost of loose-laid protected membrane roofs in Alaska was, in 1972, nearly $300 per square ($28/m^2), including insulation. Prices are rising as labor costs rise and as more insulation is specified.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

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