DIY





R-values Aren't Always Useful


| July/August 2005

R-values are a measure of a material's resistance to heat; the higher the value, the better the insulative properties. Although they are a convenient and common yardstick to measure thermal performance, the usefulness of them is limited.

In a 2000 study by Brock University in Ontario, two almost identical homes ? one built with a stick frame and the other with Structural Insulated Panels (SIPs) ? were compared for energy efficiency. Thermal analysis revealed the 2-by-6 stick frame house (rated at R-20) performed at an R-4 equivalent, while the 4 1/2-inch-wide SIP home performed at a true R-17 level in 13-degree temperatures.

The reason for the wide discrepancy is because, unlike frame systems, SIPs offer continuous insulation values across large areas of airtight walls, unbroken by studs that would otherwise conduct heat and let cold air into the building. In terms of real-world energy conservation, the SIPs home consumed only a quarter as much energy over one year as its stick-built counterpart, even though R-value ratings were comparable.
www.EasyWoodwork.org
5/27/2018 9:09:42 PM

I used the plans at WWW.EASYWOODWORK.ORG to build my own – I highly recommend you visit that website and check their plans out too. They are detailed and super easy to read and understand unlike several others I found online. The amount of plans there is mind-boggling… there’s like 16,000 plans or something like that for tons of different projects. Definitely enough to keep me busy with projects for many more years to come haha. Go to WWW.EASYWOODWORK.ORG if you want some additional plans :)







mother earth news fair 2018 schedule

MOTHER EARTH NEWS FAIR

Next: August 4-5, 2018
Albany, OR

Whether you want to learn how to grow and raise your own food, build your own root cellar, or create a green dream home, come out and learn everything you need to know — and then some!

LEARN MORE







Subscribe Today - Pay Now & Save 64% Off the Cover Price

Money-Saving Tips in Every Issue!

Mother Earth NewsAt MOTHER EARTH NEWS, we are dedicated to conserving our planet's natural resources while helping you conserve your financial resources. You'll find tips for slashing heating bills, growing fresh, natural produce at home, and more. That's why we want you to save money and trees by subscribing through our earth-friendly automatic renewal savings plan. By paying with a credit card, you save an additional $5 and get 6 issues of MOTHER EARTH NEWS for only $12.95 (USA only).

You may also use the Bill Me option and pay $17.95 for 6 issues.

Canadian Subscribers - Click Here
International Subscribers - Click Here
Canadian subscriptions: 1 year (includes postage & GST).


Facebook Pinterest Instagram YouTube Twitter flipboard