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Tuesday, December 1, 2020 | History

2 edition of FPL roof temperature and moisture model found in the catalog.

FPL roof temperature and moisture model

Anton TenWolde

FPL roof temperature and moisture model

description and verification

by Anton TenWolde

  • 261 Want to read
  • 38 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory in Madison, WI .
Written in English

    Subjects:
  • Attics.,
  • Roofs -- Thermal properties.,
  • Dampness in buildings -- Measurement.

  • Edition Notes

    Other titlesRoof temperature and moisture model.
    StatementAnton TenWolde.
    SeriesResearch paper FPL-RP -- 561.
    ContributionsForest Products Laboratory (U.S.)
    The Physical Object
    Pagination48 p. :
    Number of Pages48
    ID Numbers
    Open LibraryOL17695462M

    Whether you are replacing a failing roof or building a new addition, the roof design specification is a critical component to the success of the project. The roof specification is a comprehensive document that describes how the roof and its components should be installed . The most damaging weather factors to your roof. Temperature Extremes or Thermal Shock. This roof has been exposed to many temperature swings and is showing signs of wear. Thermal shock describes what happens when air temperature varies greatly from day to night within a single day.   JUNO BEACH, Fla., Aug. 4, /PRNewswire/ -- Summer is synonymous with higher temperatures, and that may also mean higher than normal energy bills. As the days get longer and hotter, your air conditioner needs to run longer to keep you cool and can account for half or more of your bill. Prerequisites: A basic knowledge of thermal terminology and calculation skills. Successful completion of the Roofing Technology and Science 1 program, Roof System Thermal & Moisture Design To schedule the RRC exam and get additional information contact RCI at • 8educationalhoursfromRCIFile Size: 88KB.


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FPL roof temperature and moisture model by Anton TenWolde Download PDF EPUB FB2

TenWolde, Anton. FPL roof temperature and moisture model: description and verification. Res. Pap. FPL–RP– Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 48Êp. A limited number of free copies of this publication are available to the public from the Forest Products Laboratory, One Gifford.

Get this from a library. FPL roof temperature and moisture model: description and verification. [A TenWolde; Forest Products Laboratory (U.S.)] -- This paper describes a mathematical model developed by the Forest Products Laboratory to predict attic temperatures, relative humidities, and roof sheathing moisture content.

Comparison of data from. Additional Physical Format: Print version: TenWolde, A. (Anton). FPL roof temperature and moisture model (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource. Data for that article addresses manufacturing temperature versus subsequent on-roof temperature exposures of asphalt roofing shingles.

It's worth noting that the environmental temperature exposure that asphalt shingles experience on a roof, even in a hot sunny climate, will not approach the temperatures used for manufacturing of the shingle.

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Analysis of three-year Wisconsin temperature histories for roof systems using wood, wood-thermoplastic composite, and fiberglass shingles. FPL Roof Temperature and Moisture Model.

MOISTURE-RELATED PROPERTIES OF WOOD Fig. 1— (a) Illustration of a cut-away tree at various magnifications; it is intended to correspond roughly with the images to its right. At the top, at an approximate magnification of x, a softwood cell and several hardwood cells are illustrated, to give a sense of scale between the Size: 2MB.

The FPL model has been used to predict roof temperature histories for plywood roof sheathing at a dozen locations across the United States. Those predictions are then used to predict engineering design adjustments for FR-treated plywood roof sheathing in ASTM Standard D (ASTM a) and for FR-treated roof truss lumber in ASTM Standard.

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Sherratt, 2 books Andrew R. Thomas, 2 books Michael T. Kubal, 2 books A. TenWolde, 2. Radio Service, 3 books Donald R. Brann, 1 book Abby Klein, 1 book Philip Schmidt, 1 book Christiane Duchesne, 1 book Sharon Dunn, 1 book Matthew Paymar, 1 book Steve McKinstry, 1 book Stephan Isphording, 1 book Walter Ian Fischman, 1 book Ralph Treves, 1 book Catherine Daly-Weir, 1 book Karen Kelly, 1 book Bill Bryson, 1 book Susan Hood, 1 book.

Guide to the Effects of Moisture on Wood Flooring: Best Wood Floor Installation Practices. As described in the book, Best Practices Guide to Residential Construction Chapter 5, Interior Finish: Understanding and controlling moisture levels is the key to success with wood flooring.

In Phase I Prevatt et al. (), we installed temperature, relative humidity and moisture sensors in each of the four attics to monitor the movement and potential storage of moisture in the roof sheathing. Acquisition of this field data is an ongoing process, done wirelessly through data.

Enclosed please find the Qualitative On‐Roof Infrared Moisture Survey Report which we conducted for you on August 6, at: Midway Road Anywhere, USA Our report is designed to be clear, easy to understand and useful.

Please take the time to review it Size: KB. Moisture Damage • Damage caused by – Very high humidity for a long time – Wet (%RH) for a shorter time • Time required depends – on material – Temperature • Higher temperature accelerates process Heat Air and Moisture No.3/78 Building Science.

Remember that roof membranes are essentially impermeable. An air and vapor barrier placed lower in the roof system can prevent any water that has managed to leak in from going elsewhere.

Construction–Related Moisture. Most construction. Free Online Library: Analysis of three-year Wisconsin temperature histories for roof systems using wood, wood-thermoplastic composite, and fiberglass shingles. by "Forest Products Journal"; Business Forest products industry Engineered wood Thermal properties Usage Roofing Thermoplastic composites.

The impacts of ventilation ratio and vent balance on cooling load and air flow of naturally ventilated attics are studied in this paper using an unsteady computational fluid dynamics (CFD) model.

Buoyancy-driven turbulent ventilations in attics of gable-roof residential buildings are simulated for typical summer conditions.

Ventilation ratios from 1/ to 1/25 combined with both balanced and Cited by: 9. Temperature and moisture measurements were made in a ventilated attic on a house with mm mineral wool insulation. The measurements showed that 1) solar radiation had a great effect on the temperature in the attic; 2) moisture content reached a level Cited by: 2.

from attic-to-outdoors showed little sensitivity to moisture accumulation in the roof sheathing. The PRAT assessments and the field measured moisture content of the roof sheathing for the homes in Venice, FL and Gainesville, FL indicated that during the summer and winter periods the moisture content was always below a 20% moisture content Size: 7MB.

The effect of moisture on the thermal conductance of roofing systems (NBS building science series) [Lawrence I Knab] on *FREE* shipping on qualifying : Lawrence I Knab. direct comparison of moisture or temperature effects only.

To evaluate the effect of moisture on mechanical properties of clear wood, ii base value at about 20 C and 12% MC was inferred from each data set containing moisture-effect data. The average moisture effects trend of the data set was then represented relative.

Moisture conditions within the roof void are also heavily influenced by the effectiveness of the airtight seal or vapour control layer at ceiling level. Where there are gaps around penetrations and displaced or ripped membranes, the subsequent air leakage into the roof void can transfer considerable quantities of water vapour which are likely Author: Charles Stirling.

RP-FPL FPL roof temperature and moisture model: description and verification NASA Technical Reports Server NSCEP/NEPIS - EPA's Gateway to Free Digital & Paper Publications. MOISTURE CONTENT DETERMINATION AND TEMPERATURE PROFILE MODELING OF FLEXIBLE PAVEMENT STRUCTURES Brian K.

Diefenderfer Chair: Dr. Imad Al-Qadi The Via Department of Civil and Environmental Engineering ABSTRACT A majority of the primary roadways in the United States are constructed using hot-mix asphalt (HMA) placed over a granular base material. If you need a new roof on your home or office, you have many choices of roofing materials, including roll roofing, shingles and shakes.

No matter which type of roofing material you install, the roofing process will go the most smoothly if you install roofing in the proper temperature. Core Cut - A sample of the roof system extractedfrom anexisting roof system for further analysis, including all elements of the roof-ing systemand deck materials ca-pable of moisture absorption, excluding light weight and struc-tural concrete, light weight insu-lating concrete, gypsum, and cementious wood fiber roof Size: KB.

in summer time a green roof surface temperature can be 30 °C compared to a reference roof temperature of 70 °C. Additionally a green roof’s mean daily temperature fluctuation is 5‐7 °C, while the reference roof is from 42 to 47 °C. By moderating the roof.

condensation in the roof in homes with typical moisture loads. METHODS The moisture performance of the attic was simulated in two ways: first the roof sheathing moisture content was analyzed with a building enclosure simulation model, and second the attic humidity was investigated using a whole house simulation model.

Building and Attic Selection. allowing moisture from a light rain or even dew to be built into the roof may significantly reduce the effectiveness of a porous insulation.

The moisture content of insulation may range from oven dry to complete saturation. In this report, moisture contents are expressed in terms of percent of gross Size: 1MB. Condensation potential in high thermal performance walls: Hot, humid summer climate (Research paper FPL) [Sherwood, Gerald E] on *FREE* shipping on qualifying offers.

Condensation potential in high thermal performance walls: Hot, humid summer climate (Research paper FPL)Author: Gerald E Sherwood.

Evaluation of Indoor Temperature through Roof and Wall Temperatures - An Experimental Study in Hot and Humid ClimateResearch Scholar, Associate professor, Department of Civil and Structural Engineering, Annamalai University, Chidambaram -Tamil Nadu, India.

takes place with respect to the fluids, conduction and. Introduction. Substantial work has been done for prediction of thermal environment inside a building considering only the heat transfer, and for simulation, many programs and codes are available.

Literature on moisture transfer in buildings is also available, but the study of combined heat and moisture transfer affecting the temperature and humidity of room air is still by: rapidly the existing roof system would dry after it had been re-covered.

•To assess the roof system’s drying rate, it was essential to accurately determine the initial concentration and distribution of moisture in the existing roof system. •To accomplish this, a nuclear densometer moisture survey of the entire roof on a grid with nodes 5 feet. nuclear moisture detection technology on these roof systems to determine their moisture content.

For more information, call us at Accurate roof measurement insures reliable survey results. Nationwide service INFRARED • ELD FUSION® • NUCLEAR since File Size: 1MB. JUNO BEACH, Fla., April 20 /PRNewswire Interactive News Release/ -- Florida Power & Light Company says vacationers and part-time residents can reduce the amount of electricity they use while away and still protect their belongings from damage due to mold and mildew that grow so easily in Florida's hot, humid climate.

A prioritized list might include hour of day, outdoor air temperature, cloud cover, color of the roof, roof orientation, where the measurement is taken (sheathing or shingles, top or bottom), latitude, wind speed, rain or snow on the roof, heat conduction across attic insulation, roof framing type (truss or cathedral), and attic ventilation to.

WOOD CONNECTIONS I Michelle Kam-Biron, S.E. Wood Products Council – WoodWorks. Wood Products Council is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members.

The moisture content of aggregate subbase layers was measured utilizing two types of Time-Domain Reflectometry (TDR) probes that differed in their mode of operation.

The temperature profile of the pavement was measured using thermocouples. Data for the moisture content determination was collected and results from two probe types were evaluated.

Flat Roof Inspections Introduction Infrared technology is an excellent tool to map the distribution of trapped moisture in insulated flat roof systems. Most inspections are conducted by walking on the roof surface with a hand-held camera, but there are times when aerial surveys from a helicopter or fixed wing aircraft are more Size: KB.

the temperature is held constant at 25 oC. Figure 1 shows how the numerical model is able to predict very well the transient moisture diffusion in the wall with the relative differences below %. Figure 1: Moisture distribution along the wall with time.

moisture and reducing the risk of mois-ture-related problems by judicious de-sign, assembly and material choices is the most practical approach for design-ing buildings and conditioning systems. The Moisture Balance If a balance between wetting and dry-ing is maintained, moisture will not ac-cumulate over time, and moisture-related.

All you need to do is turn your humidistat to the “ON” setting and set your thermostat to the desired temperature. Humidistat Settings When Away: If you are going to be on vacation or away from your home for an extended period, you can set your humidistat to use less energy.

According to energy experts at Florida Power and Light, mold can. Once observations at % and % relative humidity were excluded from analysis, there was a negative logarithmic relation between these estimates of longevity and pollen moisture content (%, wet basis) and a curvilinear semi-logarithmic relation between longevity and by: