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Author : Haldor W. C. Aamot
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (312 download)
Download or read book Protected Membrane Roofs in Cold Regions written by Haldor W. C. Aamot and published by . This book was released on 1976 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Haldor W. C. Aamot
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (19 download)
Download or read book Protected Membrane Roofs in Cold Regions written by Haldor W. C. Aamot and published by . This book was released on 1976 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The repair and maintenance costs of low slope roofs are high and their life expectancy is less than desired. The increasing use of insulation is accompanied by a greater incidence of problems. The experience in cold regions amplifies these experiences. Protected membrane roofs have the prerequisites for better performance and the experience to date is encouraging. The results of performance measurements of three roofs built by the Corps of Engineers verify that the membrane remains at nearly constant temperature, independent of the weather, and that the insulation retains its integrity despite periodic wetting. Moisture absorption is slow and appears to stabilize in time due to the self-drying nature of the roof. Heat losses are increased due to rain, and extra insulation should be added to compensate for these losses. The resistance of protected membrane roofs to fire, traffic, impact, and other adverse forces is superior. So far, the initial cost of protected membrane roofs is at a premium, primarily due to the cost of concrete pavers. The initial cost premium can be justified, however, by the reduced repair and maintenance costs as indicated to date, and by the longer life expectancy of the protected membrane. The high probability of superior performance and cost effectiveness is a compelling reason to incorporate protected membrane roofs increasingly in Government construction.
Author : David Schaefer
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (312 download)
Download or read book Water Absorption of Insulation in Protected Membrane Roofing Systems written by David Schaefer and published by . This book was released on 1976 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (227 download)
Download or read book Mid-Winter Installation of Protected Membrane Roofs in Alaska written by and published by . This book was released on 1977 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 losse-laid, 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/sq.m), including insulation. Prices are rising as labor costs rise and as more insulation is specified.
Author : David Schaefer
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (36 download)
Download or read book Observation and Analysis of Protected Membrane Roofing Systems written by David Schaefer and published by . This book was released on 1977 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Schaefer
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (149 download)
Download or read book Protected Membrane Roofing System Installation at Hanover, New Hampshire written by David Schaefer and published by . This book was released on 1974 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protected membrane roofing is a relatively new concept that is currently under development by USA CRREL. A major problem with continued development is the reluctance of designers and contractors to specify and bid on this roofing procedure. This paper reports on the construction of a protected membrane roof on the CRREL laboratory at Hanover, N.H. It includes discussions of the bidding procedure, cost breakdown as supplied by the contractor and photographic coverage of the various construction procedures. The concept proved to be material-sensitive rather than labor-sensitive (labor costs 12% of total, materials 58%). A pre-bid conference with potential bidders was found to be valuable. The completed roof has performed satisfactorily.
Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (227 download)
Download or read book Water Absorption of Insulation in Protected Membrane Roofing Systems written by and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current methods for evaluation of the moisture absorption of plastic insulations (ASTM-C-272-53 and ASTM-C-355-64) due to vapor pressure gradients or immersion rely on short time periods to predict long term performance. This procedure may not provide accurate information on performance since in practice insulations may absorb more moisture than these tests indicate. A series of tests were conducted on extruded polystyrene roof insulation that had been in place, exposed to environmental moisture and pressure gradients, for a maximum of 36 months. Results indicate that moisture absorption of 1.5% by volume can be expected in the field. (Author).
Author : J. Paul Guyer, P.E., R.A.
Publisher : Guyer Partners
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4./5 ( download)
Download or read book An Introduction to Cold Regions Design: Architectural written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2018-01-27 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for professional engineers, architects and construction managers interested in architectural design of buildings in cold regions. Here is what is discussed: 1. GENERAL 2. TYPES OF CONSTRUCTION 3. ROOFING 4. ROOF SLOPE 5. EXTERIOR PAINTING 6. CAULKING 7. EXTERIOR DOORS 8. WINDOWS 9. CONDENSATION, VAPOR RETARDER, INSULATION, AND VENTILATION 10. MISCELLANEOUS ARCHITECTURAL REQUIREMENTS.
Author : J. Paul Guyer, P.E., R.A.
Publisher : Guyer Partners
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4./5 ( download)
Download or read book An Introduction to Building Design for Cold Regions for Professional Engineers written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2022-07-09 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for professional engineers, architects and construction managers interested in design and construction of buildings in cold and arctic regions. Here is what is discussed: 1. GENERAL 2. TYPES OF CONSTRUCTION, 3. ROOFING, 4. ROOF SLOPE, 5. EXTERIOR PAINTING, 6. CAULKING, 7. EXTERIOR DOORS, 8. WINDOWS, 9. CONDENSATION, VAPOR RETARDER, INSULATION, AND VENTILATION, 10. MISCELLANEOUS ARCHITECTURAL REQUIREMENTS.
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher :
ISBN 13 :
Total Pages : 610 pages
Book Rating : 4.3/5 (91 download)
Download or read book Technical Report written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1976 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (319 download)
Download or read book CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1981 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Schaefer
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (11 download)
Download or read book Observation and Analysis of Protected Membrane Roofing Systems written by David Schaefer and published by . This book was released on 1977 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.:/5 (319 download)
Download or read book Special Report written by and published by . This book was released on 1989 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Schaefer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (61 download)
Download or read book Protected Membrane Roofing System Installation at Hanover, New Hampshire written by David Schaefer and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protected membrane roofing is a relatively new concept that is currently under development by USA CRREL. A major problem with continued development is the reluctance of designers and contractors to specify and bid on this roofing procedure. This paper reports on the construction of a protected membrane roof on the CRREL laboratory at Hanover, N.H. It includes discussions of the bidding procedure, cost breakdown as supplied by the contractor and photographic coverage of the various construction procedures. The concept proved to be material-sensitive rather than labor-sensitive (labor costs 12% of total, materials 58%). A pre-bid conference with potential bidders was found to be valuable. The completed roof has performed satisfactorily.
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher :
ISBN 13 :
Total Pages : 764 pages
Book Rating : 4.3/5 (91 download)
Download or read book Technical Report written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1977 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank J. Powell
Publisher : ASTM International
ISBN 13 : 0803104936
Total Pages : 750 pages
Book Rating : 4.8/5 (31 download)
Download or read book Thermal Insulation written by Frank J. Powell and published by ASTM International. This book was released on 1987 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Allen Lyte
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book Dual Barrier Protected Membrane Roof Assemblies written by W. Allen Lyte and published by . This book was released on 2011 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durable roof design is accomplished through the selection of proven high performance materials that are detailed to accepted standards and assembled by skilled tradespeople. Leak prevention is a high concern of building owners that can be addressed by protected membrane dual barrier roofs. The case studies herein illustrate the improvement of the membrane and insulation. Typically, roofing membranes are generally the only barrier for managing moisture (rain, vapor pressure, air movement) through a building's roof. The position of the insulation is also an important consideration because insulation on the membrane's exterior protects it from thermal shock and generally extends the roof membrane's service life. Largely for this reason, protected roof membranes have been recognized for their superior performance over that of conventional roofs because the insulation protects the primary roofing membrane from wide temperature fluctuations, solar radiation, and foot traffic over the roof membrane. The concept of dual barrier roofing simply includes (a) designing a new roof assembly to include at least one "extra" layer of moisture protection or (b) simply designing the standard existing roof components to resist the elements in order to further improve the performance of a protected roof assembly. Case studies are presented that summarize the physical attributes for dual barrier roofing, both in new construction and for roof replacement/renewal projects. Measured performance comparisons indicate that a dual barrier protected membrane roof can be on the order of 10 % to 20 % more thermally efficient that a typical protected membrane [Tobiasson, W., and Richard, J., "Moisture Gain and Its Thermal Consequence for Common Roof Insulations," NRCA Fifth Conference on Roofing Technology, US Army Cold Regions Research & Engineering Laboratory, Gaithersburg, Maryland, April 1979; Beech, J. C., and Saunders, G. K., "The Performance of Lightweight Inverted Flat Roofs, Building Research Establishment," NRCA Second International Symposium on Roofing Technology, Princes Risborough Laboratory, Buckingshamshire, United Kingdom, September 1985]. Additional performance and service life benefits are also summarized.
