{"id":59317,"date":"1988-07-01T04:00:00","date_gmt":"1988-07-01T04:00:00","guid":{"rendered":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/article\/insulating-8-inch-block_o"},"modified":"1988-07-01T04:00:00","modified_gmt":"1988-07-01T04:00:00","slug":"insulating-8-inch-block_o","status":"publish","type":"post","link":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/how-to\/insulating-8-inch-block_o\/","title":{"rendered":"Insulating 8-inch block"},"content":{"rendered":"

Can you recommend a method of insulating regular 8-inch concrete masonry units that performs as well as an insulated 6-inch wood-frame house and is still cost competitive? Would rigid insulation on the exterior and veneer or lathe and stucco do the trick? I need some statistics to show comparisons. My area is in the White Mountains of Arizona: 7,000 feet elevation, -20\u00ba F to +88\u00ba F. This may help us get into the housing market in this area.<\/p>

Following the chart shown here, you can build a concrete masonry wall with an R value equal to the R value of an insulated 6-inch wood-frame wall. Check with your local material suppliers for exact R values and prices of materials. Using molded expanded polystyrene or extruded expanded polystyrene instead of expanded polyurethane would provide R values of 7.00 or 10.00 instead of 12.50.<\/p>

INSULATION NEEDED TO GIVE 8-INCH CMU WALL SAME R VALUE AS INSULATED 6-INCH WOOD-FRAME WALL<\/strong><\/td> <\/tr>
6-inch wood-frame wall<\/td> R value<\/td> <\/tr>
<\/td> 1. Outside surface film<\/td> 0.17<\/td> <\/tr>
2. Wood siding<\/td> 0.81<\/td> <\/tr>
3. Sheathing felt<\/td> 0.06<\/td> <\/tr>
4. Plywood sheathing, 1\/2 inch<\/td> 0.62<\/td> <\/tr>
5. Batt insulation<\/td> 19.00<\/td> <\/tr>
6. Gypsum plasterboard, 1\/2 inch<\/td> 0.45<\/td> <\/tr>
7. Inside surface film<\/td> 0.68<\/td> <\/tr>
Total<\/td> 21.79<\/td> <\/tr>
8-inch concrete masonry wall<\/td> R value<\/td> <\/tr>
<\/td> 1. Outside surface film<\/td> 0.17<\/td> <\/tr>
2. Stucco, 3\/4 inch<\/td> 0.15<\/td> <\/tr>
3. Lightweight concrete masonry<\/td> 2.12<\/td> <\/tr>
4. Cores filled with insulation<\/td> 4.85<\/td> <\/tr>
5. Expanded polyurethane rigid insulation, 2-inch<\/td> 12.50<\/td> <\/tr>
6. Gypsum plasterboard, 1\/2 inch<\/td> 0.45<\/td> <\/tr>
7. Inside surface film<\/td> 0.68<\/td> <\/tr>
Total<\/td> 20.92<\/td> <\/tr>
Sources<\/strong>Means, R. S., Building Systems Cost Guide<\/em>, 100 Construction Plaza, Kingston, MA 02364.Olin, Schmidt, and Lewis, Construction–Principles, Materials and Methods<\/em>, Institute of Financial Education, 111 E. Wacker Dr., Chicago, IL 60601.”Thermal Insulation of Concrete Masonry Walls,” NCMA-TEK 38-A, National Concrete Masonry Association, 2302 Horsepen Rd., Herndon, VA 22070.<\/font><\/td> <\/tr> <\/tbody> <\/table><\/figure><\/div> ","protected":false},"excerpt":{"rendered":"

Can you recommend a method of insulating regular 8-inch concrete masonry units that performs as well as an insulated 6-inch wood-frame house and is still cost competitive? Would rigid insulation on the exterior and veneer or lathe and stucco do the trick? I need some statistics to show comparisons. My area is in the White […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"scheduledNewsletterDates":[],"_scheduled_newsletter_id":0,"footnotes":"","jetpack_post_was_ever_published":false,"zonda_content_type_url_append":"_o","zonda_dfp_zone":"","zonda_exclude_recommended_contents":false,"zonda_exclude_most_popular":false,"zonda_exclude_tagged_results":false,"zonda_eyebrow":"","zonda_last_newsletter_date":"2099-12-31T23:59:59.999-05:00","zonda_original_url":"","zonda_pdf_version":0,"zonda_print_headline":"Insulating 8-inch block","zonda_promo_abstract":"Can you recommend a method of insulating regular 8-inch concrete masonry units that performs as well as an insulated 6-inch wood-frame house and is still cost competitive? 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