Document zoy7oY6kVgM6yx2p1GqRLD6nR

<t+m \ mfif I twpt fiw* LlA?U90 LEAD INDUSTRIES ASSOCIATION 0 CAST 4Zn STRCCT NEW YORK 17. N. V. jjovecbep 1, 1957 SUBJECTt pPHtIKTS-SWEETS CATALOGS " ~~bs' FL'J-SINOV ROOf IIP RK3 ' ~~ FLASKUW . To Uenber* of tha Load Industrie* Association; Attached are preprint* of oar catalogs on Lcad la Itodera Flunking* and "Modern Lead for Roofing and Flashing" which will appear la tha 1958 Sweotls Catalogs to bo distributed In January, 1958* Both of our catalogs will appear In the Sweat** Architec tural volume with a circulation of 19,000 architects, and the Light Construction volume with a circulation of 27,000 builders of hones and other light construction projocts. Additional copies of these preprints are available and in quantities less than 25 will be suppliod nanbors fre-e of charge. Quantities above this arwunt can be supplied nenbers at our cost of $2,35 per humred. * Ts^r truly your*. Socrotaiy. n*'-"i **W LIA21A91 h . uj i^u i^ < 1 O MODERN pwr^' a_n_ *r`-L-^--~ 1--^ -- ^ B for roofing and flashing 0 ........... K- Ji- . ' ! M! u I f 11 i .4y -;- i M^.111 L'^UJXU iJj u u u ? JfcVt fcr \~* A wr-.jil h$m* .* Srjn(o*d Co**. >!h fljvK<nf lt'iOu<*'CvV (Kimnr; tip A*d P/ftOOtt *d frffttt. *dWtU. i'fl lf*d li*irjv Th* Ct^rt H>o m. Nc Tort C'ty. f>< *cJ Ih-'Owjhcvt with 3ft fcl'P k*d Th'^pKlU fvP'*fV Corn>c **d |wtt*f * iftciwfed Cm Gib*f*. #<cVect LEAD INDUSTRIES ASSOCIATION NEW YORK N 1651.01 UWJ w .h -ij i .iatffw*iwt ^y^Jqw.P LIA21492 MODERN sheet lead for roofing and flashings In recent yean the cost of IcaJ rooting and (lashing ha* been lowered to a point where it if comparable--frequently even lest--than the cot of other commonly used inetalt. This it because modern metallurgy hat produced hard lead--an alloy of lead with between 6 and 7.5 per cent antimony--which it stronger and may be used in thinner, lighter sheets while retaining the well known resistance of lead to corrosion. for the largest building or the smallest horns Thu* the owner of the largest building or the smallest home now has within his reach this tine sheet metal which has long been considered a lull-mark of gtxxl construction. lead's beauty and longevity have featured the great buildings and finest residence* of tile Old and New World for centuries. The lower cost and greater strength of the modern alloy now extend its usefulness to modern buildings of all kinds and sizes and in all location*--urban, rural, industrial or by the sea. If properly specified anj applied, it should installation of sheet lead There are just three important things to bear in mind in order to obtain a satisfactory installa tion with hard sheet lead--specify the proper thickness or weight, use sheets of proper size, and Install with cleats and Ioosc-hicks so that each sheet may expand and contract independently of ex cry other sheet and the surface to which it is applied. The thickness of sheet lead is usually desig nated by its weight per square f'xt. I he weights of hard lead for roofing anj flashing arc as follows: 2^ ft pit h ft in. thick 3 lb. 9t tt thidk For most applications in residential work, where areas covered are generally small and sheets arc narrow, 2? i-lb. hard lead stioutd be specified. For most applications on large build* ings where areas covered are apt to be large and sheets wiJcr, 3*lb. bard lead is recommendeJ. For general flashing purpo.es* individual sheets should not exceed K ft. in l-ngth. Howe\cr, for unusually wide flashings, say 34 in. or more, the length of sheets rhoulj be reduced to 2 last as long as any building on which it is in stalled. the advantages of lead Docs not stain adjacent stone, paint or other materials when water runs ov cr it and then onto the adjoining structure. Beautiful color, harmonious with all other materials and acquiring a natural patina that improves with age. Flexibility that permits easier, cheaper in stallation and better fitting to irregular surfaces. Most durable common metal, noted for corrosion resistance in all kinds of atmos pheres--industrial, urban, rural or sea coast. About twice as thick as other sheet metals commonly used, adding even further to U* durability. A homogeneous metal all the way through, nt just a coating, enabling it alw ays to give the same uniformly gtnd service regardless of surface impairment. 0 0 ft. I or genera! roofing purposes, sheets 24 in. wide and not more than 4 It. long should be used. I.eaJ rooting and flashing sheets should be se cured to the underlying Nurfacc bv 2'.-lb. bard lead or copper cleats loose-locked into the edges of the lead sheets. Where the lead sheets arc particularly small, such as flashings inter- woven with shingles or slates, the lead may be nailed ahmg one edge only. Adjoining lead sheets should be loose-locked together so that expansion and contrition arc confined to individual sheets. Sheets should never be soldered together, solder only being used to place gusset pieces and the like in individual sheets. Where lead is built into ma sonry walls or otherwise rigidly held, continuous hx*cdock* should be used to join it to exposed sheets, h.dgcs of lead sheets turned over coping*, cornices, etc., should be loose-locked to continu ous clejts to secure them. 1 ^tote-locks should be titled with non-hardening compound such as Vub catex No. 72t0 on flatly pitching surfaces. In other words, an understanding of the fact that expansion anti contraction must be localized in small areas and each sheet allowed to mme indcpctulently of others will lead to successful installations. 0 o 1 ! aj typical lead flashings details OPEN VALLEYS 4 MODERN 'T i U ^i |i nm ^ m ,mm u ) j* j gi>i vi i )w\ Detail of a hard lead valley flashing showcleats holding valley sheets at the sides and folded into the loose locks which joint the sheets at 8*ft. intervals along the valley. 9 Photograph of a hard lead valley hashing being installed on a residence at Greenwich, Conn., showing one S-ft. sheet in place, held by cleats at the side and turned back at the upper end ready to he toosc-lochcJ to the next sheet. CHIMNEY CAPS AND PUSHING Detail of hard lead stepped sidewall flash* ing. liaise Hashings are interwoven with the shingles or slates and nailed at the top. Stepped rap flashings, of a length dcjKrndcnt on the pitch, overlap the base Hashings and cadi other about 4 in. Free edges of lead flashings should be furnrtl about 1 . in. for O rigidity. Cap Hashings are omitted for shingle or wood silling which overlaps the base Hashing. \ mnez i . /. a iicwi^r Detail of a lead chimney cap as shown on the house on the cover. Outside corners are folded and inside corners are dosed by gus sets soldered in place. The caps are either turned hack under projecting chimney tops or held down by cleats built into the maumry wih the cap linked over them. Chimney base Hashing* are installed at with other metals, the detail for sidewall Hashings (left) apply* ing to tlu* sides of the chimney. LEAD INDUSTRIES ASSOCIATION i JH /.iqu i TT ", -'Lyii i 7 PWEV n- vmjn _______^SL^- JU- MODERN i;H^ CORNICE, COPING AND THROUGH WALL FLASHINGS Mh.fcct 1AOOW t HOOUECtUl l*hotngraph of hard lead corniic and coping onering (n the library at I.vnbrook, I.nng Island, NA . The detail at the right shows a method of instal lation, with loose-linked cm** Kann at X-ft. inter vals. luMikediH'kt arc also provided where the flatting emerges from masonry and along the outer edge of cornices. BUILT-IN sunn LEAD ROOf CONSTRUCTION 94 o "WI" p i p h iw i il iww* l y 1v w w JTiotograph of hard lead bullion gutter on a new dormitorv at Duke University and a de railed drawing of *f.c mettioJ of installation. A comloUJ-jt cleat -nch.ir* tlie lead at (be ed*^ anil loose-lotked cross seams in the direction of fhm. filled with non-hardening compound, are provided at not more than X-ft. intervals. I.cad roots mav In* f cithir the standing seam or batten tvpe. I fic latter is preferred for large nnif* while the former may be employed for jmreh. bay window or otbci smaller roofs. Cleats are staggered at 24-in. interval-* along tire sides of tbc sheets. Ilori/ontal flat loose* locked (Toss warns in tbc direction of How arc provided at 4-ft. intervals anj have cleat* folded in*1 them. Cross seams should l*c stag gered in adjoining bavv I lard lead batten roof on tbc New Jersey Reformatory at Railway it shown during tnstailathtn. SERVICE Hie I-cad Industries Ass4ciation is prepared to assist with technical information and sj'ccitication* applicable to your s j k u Hc problem* Write to: ' ARCHITECTURAL DEPARTMENT L f; 0ITjliT :0>I0100\0 60 at 42nd Slr*tl Now York 17, N. Y. \ ... ,