. Cyclopedia of architecture, carpentry, and building : a general reference work. enl)ricks, often used for nailings,l)y their shrinkage will besides weakening better way is to use a strong mortar into which the nails ofthe furring strips may be driven or porous terra cotta blocks maybe set for nailings in special work. Cleaning Down. When a piece of brickwork is completed,the exterior will need to be cleanefl of moitar stains and is done by washing down the wall with a dilute solu- - ~r—^^jL^_-^::^^tion of muriatic acid, using ascrubbing brush, foll
. Cyclopedia of architecture, carpentry, and building : a general reference work. enl)ricks, often used for nailings,l)y their shrinkage will besides weakening better way is to use a strong mortar into which the nails ofthe furring strips may be driven or porous terra cotta blocks maybe set for nailings in special work. Cleaning Down. When a piece of brickwork is completed,the exterior will need to be cleanefl of moitar stains and is done by washing down the wall with a dilute solu- - ~r—^^jL^_-^::^^tion of muriatic acid, using ascrubbing brush, followed bvwashing with clear water toremove all trace of the wall is then often givena coat of linseed oil cut withturpentine. At this time also, all bad joints are pointed up, thespaces under window sills are filled up, the joints of stoneworkpointed, and the wall left whole and clean. Waterproofing of Walls. Brick walls in exposed situationsare often treated with some substance to render them of the most successful processes is known as Sylvesters Pro-. Pig. 121, RelieviuK Aroli. 126 BUILDING SUPERINTENDENCE 117 cess, and consists in applying two washes to the walls, one com-posed of Castile soap and water, and the other of alnm and applied alternately will generally render the work ini]) patented solntions are now npon the market, each of whichis warranted to ])rotect against moistnre. Efflorescence. Very disagreeable and very common is thewhite efflorescence which often appears upon the face of the Inicks,due to the salts of soda and potash being dissolved by the waterand left on the surface by evaporation. Sylvesters solution is apreventive of this, applied in the same manner as for waterproofing,and the danger may be diminished by using stronger cement in theface joints. Repairs. In effecting repairs in masonry, when new workis to be connected with old, the mortar of the old work must bethoroughly cleaned of!, along thesur
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