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8/06/2020 <br /> <br />04 01 20 MASONRY REPAIR Page 8 of 9 <br />3.4 BRICK TUCKPOINTING <br />A. Confirm areas of pointing work included in the project scope. Provide additional unit price for <br />pointing of mortar joints (by the linear foot) that are not included in the base bid scope of work <br />and may be requested by the Owner or Designer. <br />B. Carefully remove mortar, taking precaution not to damage adjacent brick to remain. Utilize <br />hand tools if necessary to prevent damage. For tuckpointing, mortar joints shall be raked out to <br />a depth of at least 3/4" beneath existing surface, but not less than that necessary to reach sound <br />material. Materials damaged by use of power equipment (approved or not) will be replaced by <br />the Contractor at no additional charge. <br />C. Do not enlarge joint widths. Mortar joints shall be cut square, shallow or furrow-shaped joints <br />shall not be accepted. When raking/cutting is complete, remove all loose material with a brush <br />and/or high-pressure air. Joint surfaces shall be free of standing water at the time of re- <br />pointing/brick replacement. <br />D. For tuckpointing, fill raked joints with new mortar. Fill mortar into joints in 1/4" lifts when joint <br />depth exceeds 1/2". Start by filling deeper sections, compacting each layer, packing it into the <br />rear and corners of the joint. When lift reaches "thumbprint" hardness, apply the next layer at <br />1/4" thickness. <br />E. Thoroughly mix mortar in quantities needed to conform with required proportions and for <br />immediate use, using only mixing methods specific to the type of mortar to be used. Use mortar <br />within 1-1/2 hours of mixing, after which unused mortar shall be discarded unless otherwise <br />confirmed through the manufacturer’s product data. This period shall be reduced to 30 minutes <br />in hot weather. Re-tempering shall be allowed in accordance with ASTM C270, Subparagraph <br />6.4, only if it is demonstrated that re-tempering does not negatively affect color consistency or <br />performance. Re-tempering shall be used to replace water lost to evaporation only. Do not re- <br />temper mortars which have begun to set. <br />F. Tool mortar joints to match joints of the original profile. Remove excess smears from the <br />existing adjacent surfaces. <br />G. Clean masonry following pointing, after mortar has cured for a minimum of 7 days to remove <br />excess mortar from masonry and adjacent surfaces. <br />3.5 INFILL OF VOIDS/HOLES IN MASONRY WALL AND RESURFACING <br />A. Remove soft, deteriorated, or loose portions of masonry (or rough concrete surface) and clean <br />debris from cavity. If necessary, lightly dampen the substrate just prior to application. <br />B. Mix the repair mortar/water stop with clean water to obtain require consistency as <br />recommended by the manufacturer. Do not overmix or utilize more water than recommended. <br />Mix only as much product as can be placed within the working time. <br />C. Place material firmly into the hole/void. Form/shape compound to allow for insertion into <br />deeper portions of the void to ensure plug of opening before remainder of cavity is filled. Strike <br />material flush with the interior surface of the masonry wall. <br />DocuSign Envelope ID: 7D9ACD4F-8F6C-42B6-9ADB-C60032DB6D03