Adding Insulation to a 1944 Roof

first_img GREEN PRODUCT GUIDE RELATED ARTICLES Consider ‘storage capacity’ of the insulationWhile Albert Rooks believes that adding rigid foam is the easiest approach, he offers another thought about the differences between types of insulation that may play a role in lowering summer heat gain.“While lowering the indoor temperature peak on a hot day will obviously lower the indoor temps, increasing the cycle time that it takes to reach the interior peak temp means that the room can stay at comfortable temperatures longer,” Rooks writes. “That is the effect of the insulating materials heat storage capacity.”By choosing insulation with higher storage capacity, he adds, it will take longer for heat to work its way through the roof. The increase in indoor temperatures will still take place, but increasing the cycle time means lower overall heat gain and seeing peak temperatures at 3 a.m. instead of 4 p.m.Dense-pack cellulose and wood fiber insulation boards may have lower R-values per inch, Rooks says, but they have a much higher heat storage capacity than lightweight materials such as rigid foam. Green Basics: Insulating Roofs, Walls and FloorsGreen Basics: Rigid Foam Insulation7 Steps to an Energy-Efficient House: 2. The Roof” Q&A: Heat reflective roofing materialsGreen Basics: Roofing Material Choices RoofingHis plan is to tear off the existing roof down to the 2×4 rafters and then rebuild. The question is how.“Given the extremely limited depth of the rafter bays, I could get a few more R’s using spray foam or rigid foam, but I’m not sure that it would be worth the added expense,” he says. “One roofer has suggested adding pre-fab channels, edge vents and a ridge vent in order to ventilate the roof, but this just cuts the space available for insulation even more.”Cox’s roof project is the subject of this week’s Q&A Spotlight. Thaddeus Cox’s 1944 Cape Cod in Portland, Oregon, has a roof that needs some attention. Not only is the roof under-insulated, but it’s currently covered in two or three layers of asphalt shingles installed over the original layer of cedar. Roof sheathing consists of 1-in. thick boards.The International Energy Conservation Code recommends R-38 for the roof in this Climate Zone 4 house, far more than the R-11 batts Cox thinks are currently in place.But reducing winter heating bills isn’t Cox’s first concern, as he explains in this Q&A post at GreenBuildingAdvisor.“They are already pretty low with our ancient oil furnace, and should be lower after our gas conversion,” Cox writes. “What I’m most interested in is reducing the summer temps in the attic bedroom, presumably by reducing the heat transfer from the sun-heated roof.” RELATED MULTIMEDIA Video: Lstiburek’s Rules for Venting Roofs Beef up the insulationIncreasing the R-value of the roof is an obvious place to start, if only to reduce summer heat gain in the second-floor bedroom. He has more than one option.Even if Cox uses high-density foam, at roughly R-6.5 per inch, the 2×4 rafters will allow only enough insulation to reach R-26 at the most, so some additional depth would be required to reach code minimums. Low-density foam would need an even deeper rafter bay. With that in mind, Jon Schmid suggests furring out existing rafters to create a deeper rafter bay, then adding spray foam insulation.GBA senior editor Martin Holladay would go another route: “Install as much rigid foam on top of the existing sheathing as you can afford,” Holladay writes. “I would suggest at least R-30 of new foam – with or without channels above the foam.”Bob Coleman likes Holladay’s approach. Adding rigid foam on top of the sheathing is “far more economical” than adding spray foam or dense-packed cellulose inside the roof cavity, he says.If Cox wants to vent the new roof, he can build in a space between the rigid foam and new roof deck. Then there’s the roofing itselfHowever Cox chooses to increase the insulation in the roof, he’ll still need to finish the assembly with roof cladding, and this, too, will have something to do with controlling summer heat gain.In his original post, Cox says he was leaning in favor of Energy Star shingles to reduce heat gain, although he wasn’t sure if they were worth the extra expense. Roofing products that carry the Energy Star label have certain solar reflective qualities, and they must have warranties equal to or better than comparable non-reflective products.“Go for an Energy Star metal roof that will help deflect the heat (some lighter colors will almost absorb nothing),” writes Coleman, “then the foam helps seal in the cool generated inside, then a peel-and-stick or other [heavy] duty roof deck covering along with air sealing any gaps prevents conditioned air leakage.”Because they absorb so much heat, dark asphalt shingles are not the best choice in this project, Coleman writes: “If you put a blacktop driveway on your roof, the heat is going to come.”Although Cox isn’t inclined to go with metal, “due to cost, appearance and noise (think rain on a metal roof),” Rooks agrees with Coleman’s suggestion, adding that a metal roof will last much longer than shingles. Our expert’s opinionWe asked GBA technical director Peter Yost for his opinion. Here’s what he says:If the main objective of the new roof assembly is to improve overall thermal performance, but particularly to control summer heat gain, then it is always best to keep the heat out FIRST. Keeping solar heat out, before it becomes a conduction issue, is always the most effective summer heat gain strategy. Reduce the solar gain with a reflective roof cladding and if possible, introduce a ventilated air space underneath the cladding, which will increase convective heat exchange and provide a low-e surface on the backside of the cladding.I don’t think the specific heat capacity per volume of one insulation to another makes a significant difference. The specific heat capacity (per volume) of all insulations is relatively low and there is simply not enough storage in any insulation to match the day-night cycle of heat gain and loss in the roof assembly.One important way to take advantage of the day-night temperature cycle would be with night-time cooling: install an efficient whole-house exhaust fan to move hot air out and cool air in.I do like Martin’s suggestion of adding as much top-side rigid insulation as possible/economically feasible. Better bang for the buck and per inch of additional roof assembly profile. Something like this GBA detail for an exterior roof insulation retrofit.last_img read more

Kalmadi says Delhi govt, Centre used 95% of CWG funds

first_imgIn a last-ditch attempt to defend himself in the Delhi Commonwealth Games scam controversy, an angry Suresh Kalmadi on Thursday pointed fingers at the government.He accused the investigating agencies of “targeting” only the Organising Committee when government officials were also part of the entire decision-making process.Reiterating his demand for a joint parliamentary committee(JPC) probe, Kalmadi said both the central and Delhi government are equally to be blamed for the scam.Speaking to the media in Ranchi, where the national games are on, he said the OC was being unfairly targeted.  Amid reports about the Central Bureau of Investigation closing in on him after the arrest of his aides, Kalmadi said no government official had been questioned by the CBI so far despite the fact that it was the sports ministry which had cleared all the contracts. Kalmadi insisted no decision was taken by the OC unilaterally. Dragging the Centre, Kalmadi said that the sports ministry was directly involved in the decision-making process at every step. Taking on the Delhi government, Kalmadi said the state government and the Centre had utilized 95% of the funds.He expressed shock and displeasure over the way the entire matter has been handled by the investigating agencies when all the documents pertaining to the conduct of the Games were with them.Asked whether he anticipated arrest any time, Kalmadi ended a press conference abruptly saying “Let’s see”.last_img read more

LOOK: Phil Younghusband, Margaret Hall’s Pinoy-inspired prenup shoot

first_imgMOST READ ‘Rebel attack’ no cause for concern-PNP, AFP Don’t miss out on the latest news and information. ADVERTISEMENT View comments The photo shoot featured woven furniture, palm-tree leaves and local fabrics.“We are so thankful to @charissetinionp and @niceprintphoto for making our engagement shoot a memorable one. It was a beautiful experience. Lots of love and laughter and fun!” said Hall on Instagram.The two have been engaged since Dec. 29, 2017. The exact date of the wedding has not been shared as of this writing.  /raRELATED STORIES:Phil Younghusband engaged to Fil-Spanish GFLOOK: Dani Barretto, Xavi Panlilio charm in Antipolo prenup shoot Footballer Phil Younghusband and model Margaret Hall look stunning in their Pinoy-inspired prenup shoot.Nice Print Photo said the inspiration was to use native Filipino elements to include a touch of Filipino into the couple’s summer wedding in London.ADVERTISEMENT Ethel Booba twits Mocha over 2 toilets in one cubicle at SEA Games venue Cayetano: Senate, Drilon to be blamed for SEA Games mess Catholic schools seek legislated pay hike, too LATEST STORIES DA eyes importing ‘galunggong’ anew Two-day strike in Bicol fails to cripple transport 2 dead in California school attack; gunman shoots self PLAY LIST 03:122 dead in California school attack; gunman shoots self01:42Police: California school shooting took 16 seconds00:50Trending Articles02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss View this post on Instagram Private companies step in to help SEA Games hosting Sports Related Videospowered by AdSparcRead Next With bigger field, NOFA tilt kicks off Duterte wants probe of SEA Games mess The bride-to-be wore a white crochet cover-up on top of a maroon piece, while the groom-to-be sported a tan jacket and maroon pants.“I wanted a tan, the make up artist said they couldn’t do it so the stylist gave me one by putting this jacket on me,” wrote the footballer on his Instagram post. One of my many favourite pictures from our engagement shoot @magshall_ 😘❤️😍 I wanted a tan, the make up artist said they couldn’t do it so the stylist gave me one by putting this jacket on me 🧥😁 not bad! Need to bring this jacket to the beach 🏝 ☀️ 😂 Thank you to @niceprintphoto for the chance to do this 😊👍🏽 #love #happiness #engagement #wedding #fiance #fiancee #philippines #filipino #british #tan #photoshoot #jacket #fun #posing #lovelycolorA post shared by Phil Younghusband (@philyounghusband10) on May 19, 2019 at 4:26am PDTlast_img read more

It pays to be personal

first_imgInside Influence Report, one of my favorite newsletters from the great gang at ASU, reminds us once again why it pays to be personal. Here’s the story, from Noah Goldstein:I have a friend who is a medical doctor. Nicest guy in the world. Will do, and has done, anything for anybody. So I was totally perplexed — and as a social psychologist, very interested — when I learned he was having difficulty finding someone to cover his shift on the weekend of my wedding. I asked him if he had ever volunteered to take his colleagues’ shifts, and he replied that indeed he had. Considering all he had done in the past to help them, and all that we know about the power of the norm of reciprocation, it was puzzling that he could not get a single person to volunteer to help him out during his time of need. By the time he had answered my next question, however, the solution to the mystery was clear. When I inquired how he went about asking for help, he said that he had sent out an e-mail. And it wasn’t just any of type of e-mail — it was a mass e-mail, in which all of the recipients could see all the other recipients. The problem with this strategy is that it creates what is called diffusion of responsibility. By sending out the mass e-mail in a way that made visible the large number of coworkers being asked, no one single individual felt personally responsible for helping. Instead, each recipient likely assumed that someone else on that list would agree to help. In a classic demonstration of diffusion of responsibility, social psychologists John Darley and Bibb Latané staged a situation in which a student seemed to be having an epileptic seizure during a study. When a single bystander was present, that person helped approximately 85% of the time. But when five bystanders were present — all of whom were located in separate rooms, so no one could be certain if the victim was receiving help — only 31% of the bystanders helped. Fortunately for this friend, Noah Goldstein knew what to do. He told the doctor to send personal emails asking individual people specifically. It worked. The doctor attended the wedding.The more your “asks” appear to be made from you, personally and directly, to an individual, the more likely people will support you. So segment your audience. Show you know them. Speak to them like individuals. Try some one-on-one contact with your biggest supporters. Mass, impersonal, Dear Friend emails just won’t do the same job. Just ask the doctor.last_img read more

How to Build Relationships and Achieve Fundraising Success in a Web 2.0 World

first_imgPresented October 10, 2008 at the The Technology in the Arts Conference in Pittsburgh. Download the slides [PDF] below.Social networking tools like Facebook, MySpace and blogs were the hot topic of the past year. So are they worth your time?  How can you fundraise successfully with Web 2.0?  Does using the Internet mean getting rid of your offline marketing tactics?Establishing your organization’s brand and presence on the Web, with opportunities for potential donors to learn, blog, question and connect, leads to community-building and, ultimately, long-term giving. Join Jono Smith, director of marketing at Network for Good, to learn how to build affinity for your organization and use your Web presence to turn Web visitors into Web donors.Session attendees will leave with:Practical tips for how (and why) to dive into online fundraisingAn understanding of the new “Web 2.0? model of online communicationsHow and why community-building works for fundraising, and how you can empower your supporters to become champions for your causeWhy Web 2.0 makes community-building easier for youSession Leader:Jono Smith is responsible for marketing Network for Good’s online fundraising services to nonprofit organizations.  Network for Good is a nonprofit organization that helps other nonprofits raise money and reach supporters online.  Network for Good has processed more than $200 million in donations for 30,000 nonprofits since its 2001 founding by AOL, Cisco and Yahoo!.  Prior to joining Network for Good, Jono spent eight years at SunGard Higher Education, where he was responsible for managing the company’s marketing efforts in Europe and the Middle East.  Jono also held marketing and sales positions at SCT and Campus Pipeline, before their acquisitions by SunGard.  Prior to this, Jono served in the Clinton Administration as Special Assistant to the Director of White House Communications.  Jono holds an undergraduate degree in English from Loyola Marymount University in Los Angeles.  In his personal time, Jono has raised over $10,000 for AIDS vaccine research.last_img read more