b'Application, Shimming,EXTERIORSEALFastening, and SealingApplication: The new window must be installedplumb, level, and square. Make sure loads from thewall above are not transferred to the window.Shimming:All shimming should be done with the SHIMSproper pressure to the mainframe of the newly INTERIORinstalled window to guarantee the proper operation FASTENING SEALof the window sashes.The shims should be made of a material that ishard enough to support the window, provide goodthermal insulation, resist decay, and allow forPLUMB/ INSULATIONfastening to run through. LEVELFastening: To fasten the window properly to the opening, use corrosion resistant fasteners ofDo not compress the insulation to avoid pressure sufficient size and length to permanently anchoron the frame of the new window that will distort the new window.In most cases, these anchorsthe frame, which couldimpede smooth operation are supplied with the window unit. of the new window.It is also recommended that a1. Fastening for Replacement or Renovation: proper air seal on the warm side of the insulation Fasten to the jambs, and/or head sections of thebe provided.left-in-place frame using corrosion resistant screws, Interior Air/Moisture Seal: It is recommended or nails when conditions permit.Use non-tapered that an air and moisture seal be provided on the shims as needed, and install at all fastening points.interior side of the rough opening gap using sealant,2. Fastening for New Construction: Fasten the or Barrier Tape.To prevent drafts, heat loss, and new construction vinyl window into the opening further reduce the potential for the formation of structure by fastening the integral fin.Take carecondensation between the wall and the new window,to allow for natural expansion and contraction ofit is essential that the rough opening gap doesntthe window or door fin. Use cap-nails along headerallow air and moisture to pass between the new as shown elsewhere. Shim any gap present between window and the existing wall into the opening cavity.the new window and the opening, as needed. Use 1. Sealant Method: Apply Caulk/Sealant to thecorrosion resistant fasteners.interior side of the rough opening in a continuousCaulking: manner to provide an even, unbroken sealant bead1.Replacement: Use caulking during mounting sufficient to fill the gap between the new window andof replacement vinyl windows as follows: the rough opening.Where needed, foam or rubberInside/Out Application- Apply caulk to thebacker rod can be used as a bond breaker ensuringback of the exterior stop, and under the sill whenthat the sealant only bonds to the window frame andthe newly installed window is mounted against the the rough opening.exterior stop leaving weep gaps. 2. The Barrier Tape Method: Tape that is Outside/In Application- Apply caulk to theimpervious to air and moisture, with adhesive of back of the interior stop, and under the sill whensufficient strength tothe newly installed window is mounted against theadhere to wood, vinyl,interior stop. metal, or plastic shall Jamb 2. Renovation & New Construction: Caulking be placed across the Extensionalone is not recommended for use during renovation rough opening gapor remodeling installation. Instead, use properadhering to the dryflashing methods described in detail elsewhere. wall on one side of thegap, and the interiorInsulation: After new vinyl window is mounted in surface of the windowthe opening, inject PU foam between the window and frame on the other,the rough opening (RO) to insulate any perimeter or between the newvoids between the mainframe of the new window, and window frame and theBuildersthe opening.left-in-place frame. TapeWindow Fitters Guide to Window Installation52020 AWDI, LLC Do not reproduce without permission'