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Application Instructions For Backstop NT For Use Beneath Claddings Other Than Dryvit EIFS DS300 ( E.Application of Backstop NT ♦/ Note: This section provides the procedure for applying Backstop NT to the wall surface only. At the completion of the Backstop NT application,all openings and terminations must be treated with either the Dryvit AquaFlash System or Dryvit Flashing Tape(see Section V)to protect surfaces from water penetration and all terminations must be otherwise properly flashed to ensure that water is diverted to the exterior of the cladding. 1. Dryvit Grid Tape(not required with concrete and masonry substrates.) a. For sheathing substrates, apply the Dryvit Grid Tape along all joints in the sheathing, as well as inside corners,outside corners, and exposed edges at terminations that will not be covered with Dryvit AquaFlash or Dryvit Flashing Tape. b. Center the Dryvit Grid Tape on the sheathing joints, edges, etc. with the pressure sensitive adhesive backing in contact with the sheathing surface. Press into position with hand pressure until adhesion is achieved. c.Apply only enough Dryvit Grid Tape as can be covered with Backstop NT-Texture in the same day. 2. Dryvit Backstop NT-Texture Application NOTE: Backstop NT Texture is NOT recommended for use over the face of OSB. a. General: Backstop NT-Texture can be applied using a roller,trowel or texture spray equipment over the listed substrates, as noted in the usage chart above. Backstop NT-Texture should be applied at the recommended coverage rate to achieve a continuous film at a minimum dry film thickness of approximately 12 mils(0.3 mm). b. Roller Application 1)Apply Dryvit Grid Tape as described in Section IV.E.1 above. Mix the Backstop NT-Texture material as described in Section I. Using a stainless steel trowel or spatula,apply a layer of Backstop NT-Texture over the Dryvit Grid Tape and spot all fastener heads—Figure 1. NOTE: Dryvit Grid Tape is not necessary over fastener heads. 1/4 (eA m)Max. Sheathing Joints . 7e� a Backstop NT- a sk d Tenure e'3Y„ti4 .e w Dryvit Grid Tape x t Figures u a u u 2)Allow to dry for a minimum of 2 hours or until dry to the touch. NOTE: Cool, humid conditions may require longer drying times. a) Because of the absorption characteristics, plywood substrates may require a second pass to fill any voids at the sheathing joints. After the first pass has dried,check the joints and spot any voids that may be present with additional Backstop NT-Texture material and allow to dry. 3) Use a coarse, open-cell foam roller cover with a 3/8 in(9.5 mm)foam nap (FoamPro#58 roller). Apply a uniform, continuous film of Backstop NT-Texture over the entire surface of the sheathing, concrete or masonry, including the previously treated areas—Figure 2. NOTE: If the roller pulls material back out of the sheathing joints, it indicates that the joint material is not sufficiently dry. 6