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Home My WebLink AboutNCFI & WALL STRENGTH - 00-00033 - 320 W 5th S - 4-Plex ApartmentsNORTH CAROLINA Farm INDUSTRIES P. 0. eax 1528 • MOUNT air, ruc 27030-152$ 338-789-91$1 uuww.nc#i.cam N C F 2 0 2 0 PLUS AND WALL STRENGTH WHY SHOULD I WORRY ABOUT WALL STRENGTH? Your walls are the main structural component of your home. In wood frame construction, the weight of the roof and any snow on the roof push down on the walls with a compressive force. Strong winds and mind gusts impose lateral loads onto your house walls that tend to distort the walls with a shearing force. Building codes require that walls be designed to withstand these loads. However, when walls are bul"It to minimum standards,, w safe, you mai sense wall creaking during high winds or shaking when doors are slammed or the kids are actively romping abut. WHAT IS A SHEARING FORCE? A shearing farce on a wall tends to. distort the wall from it's on shape as a ' rectangle info a parallelogram. To test a fj wall's resistance to the she forces imposed by wind loading., engineers use a "rackang test."' �J—J An S ft_ x 8 . madei 1116 L 1s built and placed in a large frame. The Dase 5tud wadi as buil#. Stud wall under shear of the wall is secured to the frame and a load (exaggerated) hon'zontal (lateral) farce is appfiied at one upper corner_ The force is increased in 400 1b. increments until the wall structure fails. WHAT IS TBE EFFECT OF NCFI 20Z0 PLUS INSULATION ON WALL STRENGTH? In a series of racking tests*,, walls with and without spray -applied polyurethane foam insulation were compared. Two exterior facing rnaterials were tested: (1) Vinyl siding over 15 -Ib. building paper; and (2) 6/s -inch tenured plywood siding - All wall panels were faced with V2-1-nch sheetrock on the interilb or side and used 16 inch stud spacing. For the stud wall panels that were insulated With spray -applied polyurethane foam, the spud cavities were essentially completely filled with foam of 1.5 lb/ft' density. Litho in U. .A. As the graph indicates, stud walls filled with spray -applied polyurethane foam add significant strength to hams walls. Furthermore, for each load applied, the foam filled walls deformed less and offered greater resilience. WHAT DOES THIS MEAN TO ME? NCFI 2020 PLUS insulation Vinyl Siding Plywood Siding No Foam Foam No Foam A Racking Load (Ib) is sprayed into your stua wans mi full adheres to the exterior sheathing and studreinforcing cing bath. With this added rigidity, there will Y be less wall movement due to shaking and wibrafion. Additionally your walls have greater than code required resistance to "racking events" such as hurn'canes or other sprang wind situations. With NCFI 2020 plus, you get more than insulation .. . You get strenlgth,and an air barrier tools *Test results are reported inest"Ting and Adoption of Spray Polyurethane Foam for WoOd FrnmeRuildina Cot�structlon" (May 25, 1992) prepared by NA.�jB Research Center fvr The u Society of the Plastics Industryipoly urethane Foam Contractors Division- NCFI 368 APPLICATION INFORMATION EQUIPMENT AND COMPONENT RATIO Standard Pol-vurethane Spray Equipment is required. NCFT 3,68-R is connected to the resin pumps with IVGFI 368-A, being Connected to the isocyanate pumps. The proportioning pump ratio is I to 1. C'rusmer preheater temperature should be at I30°F. Hose temperature should be approximateiy 11f7°F to give good pattern. Equipment which op�r�teS � higher pressures will require slightly lower temperature settings. � STORAGE of CHEMICALS Keep temperature of chemicals above 65OF for several days before use. Cold chemicals (highcavitation `th r or incorrectviscosity) Keep drums e d F. not store i i direct sunktemp crature ld use proper storage conditions thesechemical stemsunder nitrouen pressure of 2-'.3` psi after thev have been �. r1X months, SAFE HANDLING OF LI UID COMPONENTS Use caution in removing bungs from 55 gallon drams. ,Loosen 3!4" bang and het gas escape before completely removing. Avoid prolonged breathing of vapors. In case of chemical contact with eyes, flush with water for at least 15 minutes and het medical attention. For further information refer to "Fire Safety Guidelines for Use of Rigid Polyurethane and Polyisacyanurate Foam .Insulation in Building Construction" published by the Alliance for the Polyurethanes Industry, I3dQ Wilson blvd., Suite BQQ, Azling�an, VA 222Q9. � PREPARATION DF SURFACE TO BE SPRAYED All surfaces to be sprayed should be clean, dry, and free of Betio or frost. be free of oil, grease, etc. Primers should be used where necessarv_ PROPER TEMPERATURE FOR OPTIMUM ADHESION All metal to which foam is to be applied must On general side wall application work the surface to be sprayed can be below 34°F. A flash coat of 358 can be used to minimize doss of thickness yield Burin; low temperature application. The system can also be sprayed at warmer temperatures. WEATHER PROTECTION OF FINISHED FOAM The finished surface of sprayed urethane should be protected from adverse effects o;Fultra�io�et rays of direct sunlight which can cause dusting and discoloration. Protective coatings designed for use with urethane foam are available VAPOR.BARRIER PROTECTION ON COLD ST(iRar:F. wnpw When sprayed urethane foam will be subjected to temperatures below 32°F, a barrier coating of 0.05 perms or lower is required an "warm" side. In the case of brick, cement, cinder block or wood this coating is applied to the substrate prior to the foaming --unless the substrate is steel in which case no �ar�rier �aating is required. (3n the "calci" side of the insulation, a protective thermal barrier coating should he used. VV -R Grace Mor�okote Z3306 is suftable for this purpose. PREDICTION OF FIDE HAZARD IN COIVSTRUCTION Where any foam Is s+I I buili Portland rptplasterors " � � ?�? rr �equivalent per applicable building code. �osed firehazzird 1/21, The information on our data sheets is tu assist CUStomers in determining whether our products. aFe u i to L for their appy I ca d customers specific cases. North Caro[ina Foam Industries warrants only that the materiat shaLt meet its must satisfy themseLves as to the u i_ tabf LI-ty for specifications th- is warranty 1- 1-n lieu of at[ other written o r unwritten, expressed o r imptied warranties and North aro h na Foam Industries fitness for a Particular purpose, or freedom from patent infringement. o rd i n t Buyer risks whatsoever as to the use of the materiat. Buyer's excLusive rernedy as to any breach n Ligenre r other c[aim s al l b l- warranty, t o the purchase price of the material. FaiLure to adhere strlctty to any recommended procedures shaLL reHeve North CaroLina Foam Industries of att tiabitity with respect t . the mater i a L or the use thereof NQRTH CAROLINA FOAM INDUSTRIES P. 0. BOX 1528 e MOUNT AIRY, HC 27030-1528 336-789-9161 www.ncfi.com ANOTHER NCFI QUALITY SPRAY POLYURETHANE FOAM WITH SELF -ADHERING, SEAMLESS, SUPER INSULATING EFFICIENCY NCFI SPRAY SYSTEM 368 NCFX Spray System 368 is a two part system designed for use in colder climates to provide a high pumped on a I to I R -value, closed cell foam for general purpose work in construction insulation. It is -ratio by volume. NCFI 3 68 has been formulated with HCFC 14 1 B as the blowing agent. Typical Physical Properties of foam made with. NCFI Spray System 3b8:* Core Density (Nominal ) Compressive Strength Maximum Service Temperature 2.0 lbs. per cubic foot 24 psi 180°F (note page 2 under Proper Temperature of Optimum Adhesion) Result of ASTM E-84 on finished foam applied to cement board: Flame Spread Smoke Developed 2 in, Thick 25 Less than 450 This numerical flame spread rating is not intended to reflect hazards presented by this or any other ions. ForpToper use'ref-er to NCF1 368 Application linformatioD and anvmaterial under actual fire condit'any of the following- codes or vuldes'. 1. SUuthern Standard Building Code, Section 2603 2. BOCA Basic Building Code, Section 2603 3. YCB0 Uniform Building Code, Section 2602 4. SPI Fire Safety Guidelines for Use of Rigid Polyurethane Foam Insulation in Building CanstTuction (R -100R) 'de for Ap-pl'Information. Please see reverse si ication CAUTION -so Polyurethane foam produced from the -se chemicals may present a risk of fire under welding and cutting in appficafions if exposed to excessive heat and oxygen, a.e., certain i 1 torches. See reverse side for prediction of fire hazard and guide for safe application. *To sen -re only as a guide. Values shown are average values obtained from laboratory specimens. Litho in U.S.A. NORTH CAROLINA FOAM INDUSTRIES P. 0. BOX 1528 * MOUNT AIRY, NC 27030,1528 336-799-9161 www.ncfi.com Insulation Fact Sheet NCFI Spray System 362-91 This fs NCFY Sprayed -gin -F ace Polyurethane Foam Insulation System 3 PLUS' Residential Insulation Systems. 62-91 for use in NCFI2020 .All insulation systems provide R -Value, the resistancc to heat flow by thermal di�'usic�n. PLUS"insulationNCH 2020 not only provides the, hl"ghest. R -value er Inch available e on the market but also provides water resistance and an excellent air barrier- This giv��r��r greater value for your Insulafion dollar thall conventional insulations such as glass cellulose,, R* Values *""As with all insulaang matenals., the R value will vaiy with age and use conditio][1s. Re -ad This Before You Buy What You Should Know About R-val Salo The chart shows the, R.,kralue of this insulation. R nieans res' greater the insulat'119 Power- Compare insulation R-vatues befo i -stance to heat flow- The higher the R-,k;alue, the There arc OthcT factors tO cons'der. The amount of ' re you bily. insulat' 11vc in. Also, vour fuel savings from 10fl YOU need depends n1a nly on the cliniate you �j Mount Of nsul -2 tion aijread�,- in insulation will depend upon the, climate',,, the type and si your house- and our fuel ize of your house, the H will Cos Use Pattems and family- s Coit You more than what �ou'll sa ' Ize,. ��ou buv too much insulation, Ve oil fuel. to get the marked R,value, It Is essent-al that th's I i insulation be installed Properly. kr b* r 39 b a� cl a ■ 2 F- �1 F r V =a i FL ■ 2 Y f