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<br /> °'"• ICBO Evaluation Service, Inc.
<br /> ` ,asuvsidiarycorPorauonofrhe.lnternational Conference of Building Officials .
<br /> I Y�n
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<br /> EVALUATION REPORT HeportNo. 2728
<br /> Copyrighl�c 1991 IC00 Evalualion Scrvicc,Inc. Aplll, 1891
<br /> Fflinp Cateqory:EXTEHIOR COATINGS (O60)
<br /> DRYVIT OUTSUTATIONO EXTEHIOH ing, using a U•nolched trowel. ADEPS adhesive is lor use with
<br /> INSULATION AND FINISH SYSTEM wood•based sheathinp only.
<br /> URYVIT SYSTEMS,INC. U.�ryvit Primus/Adhesire:The adhesive is mixed with Type I portland
<br /> ONE ENEHGY WAY cement in a ralio hy weight ol cne to one and is applied to the entire back
<br /> WEST WARWICK,RHODE ISLANO 02893 surface ot lhe insulation board with a rounded U•nolched Irowei to pro-
<br /> I.Subject:Dryvil Outsula�ionC�Exterior insulation and Finish Systei�. duce a minimum'/,•inch•wide bead,'/e-inch-deep�nd spaced maximum
<br /> 1 /z inches on center.
<br /> II.Oescriplion:A.Generel:TheDryvit0utsuladon�exterioru�tnlalion Oryvit primus/adhesive mixture is no! lor adhering to wood•based
<br /> andlinishsyslemisafourcamponenisystemthatmaybeappliedto�ertf• shcathinp.
<br /> calsubstratesolmasonp�,concrete,exteriorplaster,water•resistanlcore 4.Aflaehmenl:Thecwledinsulationboard�simmediatelyplacedhori-
<br /> gypsum sheathing camplyinp with U.B.C.Standard No.47-10 and sound, zontally in running bond on the suh>rale and slid into place.Firm pres-
<br /> unpainted exterior grade cade-complying wood•6ased sheathing such as sure is then applied lo the entire surface to ensure complele contaci he-
<br /> plywood and nonveneer boards,ezcept for liberboard.Tlie system may tween the coated insulation hoard and the substrate and to ensure that
<br /> also be applied in limited horizontal applicatians such as soflits.The four board edges abul tiphtly.No adhesive is permilted between the bwrds.
<br /> components consisl of an adhestve,molded expanded poiystyrene insu- Temporary fasteners may be used especially where contours exist,to
<br /> lationboard,awovenglassiiberfahricembeddedinthebasecoat,and ensureadequatecontactbetweenthecoatedinsulationboardandthesub-
<br /> a synthetic plasler linish.See details in this report br typical instailation, slrale during the drying period.Care should be taken when removinp the
<br /> B.M�terials: 1. Dryvit Adhesires:a.Dryvit pDEPS Adhesire:Oryvit lasteners to avoid damage to the insulation board.
<br /> ADEPS adhesive is a premixed,lully tormulated,waler•based acrylic co- Once the insulation baard has been installed,a minimum of 24 hours
<br /> potymer and is lor use with wood-basetl sheathiny only. must elapse prior lo additional work on the suAace.
<br /> 6.DryvitPrimus/Adhetfre:TheDryvilprimus/adhesiveisacopolymer 5.CoatinpandReinlorcinpFahric:a.BaseCoat:Usingastainlesssteel
<br /> , dispersionwithaquaAzsandaggregatethatismadetobemixedwithType trowelorsprayequipment,theDryvitprimus/adhesivemizlureisappiied
<br /> I portland cement. to the entire ezposed surface of the insulation boaM lo a uniform lhick-
<br /> 2.Insulilian Bo�rd:The insutation board is a molded rigid expanded ness of'/�b inch.Up to 1 cup ol water may he added to 5 gallons of adhe•
<br /> polystyrene insulation board with a nominal densiry o11 pound per cubic sive to enhance the workability of the mizture.The reinforcing fabric is
<br /> lool,Class I flame•spread ratinpand a smoke-density ratinp not exceeding P�aced against the wet adhesive miK and,by Irowelinp Irom the center to
<br /> 450.Theboardisavailabieinihicknessesrangingirom'/,inchlo4inches iheedges,thetabriciscompletelyembedded.Thefabriciscontinuous
<br /> and in maximum widlhs ol 24 inches and mazimum lengths of 4 leet. over corners and is lapped not less then 2/z inches al fahric edpes.
<br /> 6.Finlsh:Aftcr lhe Oryvit primus/adhesive mixture coatinp has dried a
<br /> 3.DryvitBaseCoat:TheDryvilbasecoatconsistsoloneormurelayers minimumof24hours,theDryvitlinishmaterialmayheapplied.Themate-
<br /> of reinlorcinq labric fuily embedded in the primus/adhesive•mixture rialismixedwithahigh•speedmixerunliiaunllormworkableconsistency
<br /> applied to the outside surface of the insulation board. is attained.Clean waler may be added to adjust workabilily in accordance
<br /> 4.Dryvil Helnforelnp F�hric:The Dryvit reinlorcinp fabric is a balanced wilh ihe manufacturer's inslruclions. The coalinp is spray or trowel
<br /> open•weave glass fiber made irom twisted multientl slrands and treated applied directryto the reinforced base cwland is leveled in the same oper-
<br /> lorcompatibilitywiththeothermaterials.Themeshweighsapprozimately atian.Whenthefinishhasgelletl,thedesiredtextureisachievedbyavari-
<br /> 4.3 ounces per square yard with a 12 x 6lhread counl,and having mini• ety ol motions with trowels or Iloats.The linal nominal thickness is ap•
<br /> mum 150 pounds per inch width lensile strenglh. proximately'/,6 inch.See Figure No.t for lurther details.
<br /> 5.DryvitFinisA:TheDryvilfinishiscomposedo(raturalmineralaggre- D. Wind Des(pn: t. Generel: Allowable transverse wind pressures
<br /> gates and lillers,colored pigments and an acrylic latex emuision. based on systems installed in accordance with this report are set foAh in
<br /> C.Appllallon:l.General:All exposed edges of insulalion board musl this section.Adequacy of the framing system to resist the applied loads
<br /> bewrappedwilhlhereinforcingmeshtullyembeddedintheprimus/adhe• must be investipated. Mazimum aliowable dellection ol structural wall
<br /> sive inixlure. componenls is 1/240 0l span.
<br /> 2.Where the system is appiied to comply��ig wood-based shealhings
<br /> 2.Subsirales:Thesubstratesarelobestruclurallysound,clean,dry otherthanli6erboard,installedinaccordancewithChapter25ofthecode,
<br /> and smoolh,with ali dusl and deleterious materials removetl.There are allowable loads specified in Ihe code may be used.
<br /> lo be no planar irregularilies exceedinp '/�inch in a 4-fool radius. 3.Where lhe system is applicd to minimum'/Z•inch•ihick water-resis-
<br /> 3.pdhesives:a.DryvitADEPSAdhesive:Theadhesiveisapplieddirect- tant core gypsum shea�hing fastened to 35/e•�nch•deep, No. 18 gauge
<br /> ly to Ihe enlire hack surlace af ihe insulation board as a continuous coat- steei slutls ar nominal 2 inch by 4 inch wood studs,spaced a maximum
<br /> F.ibhm�inn re�rls aflC00 Aralualion Yrn•ice,fnt.,are iuueA.cnfelyln prnridt infnrnmtinnln Claxx A mambers nf 1CI70.ulilianF fht rixlt npnn w•hithlhe rrpnrt
<br /> i.e LtrsrA.li rnlunYmi rcpniLc nrr nn(fn Gr onnslnrcrins rrprurnling ncalhtfia nrmq'atlirrn!!rilrnfu nuf a�vrifirnlly nddrevard xnrns nn endna�rn�n!urrrrnmmrm
<br /> dation Jor u.er af fde��uhjer!rcpnrl.
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<br /> (tsf rcsu(b�ond/nrntlmrdoln,Gul rinte�mf�xncrn�Irr!farili(irrin maAtun indrpendrn(retificafinn,There ix nn x•nrranty hy ICIJOIi�nGmlinn Srrrin,Inr.,�rprrxs
<br /> orimpfitd,o,�many..r•��e„�F•'nrntMrrmalferin U¢rrpnrt n�ax In any produr(corrrcdhylhe npnn.This Aistlrtimerincludes.Au(ix nn!limilyd In,mcrchnnfaAili(r.
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