b'(Continued frompage 10)If these splits and cracks occur regnewapplicationofaBURroofasularlyw i t hseasonaltemperature appliedoveranewinsulateddeck.changes,itisanindicationthata The added advantage here is that youcompletereroofing job isneeded. notonlyhaveasmoothsurfacetoDrainageFactors workwith,buttheoldroofingactsOTHERFACTORStoconsider asavaporbarrier.whenundertakingare-roofingjob: Onoldgravelsurfacedasphaltare any existing dips or ponding areas roofsoverconcreteornon-nailablewherewatercanaccumulatewhich decks, the prepared surface should beshouldbefilledinwithoneofthe primed and allowed to dry.The newlightweightinsulatingfillspresently roofingassemblyisappliedasoveron the market.Another manufactura new concrete deck by spot moppingerproducesataperedinsulation the bottomlayertotheprimedpre whichwheninstalledprovides~ pared surface of theold roof.If de drainageslopefordead-flatroofs, sired a minimum layerof 1"of rigidthusdirectingthewaterflow.Reroof insulation may be solidly moppedcently introduced to the marketisa tothepreparedsurfaceoftheolddevicewhichsiphonsstanding~ater roof asacushion and the top assem fromlowareasdirectlyintothe blyappliedasforanewinsulateddrains. deck.It should be kept inmind that these proceduresshouldnot beusedUrethaneReroofing on aroof on which the slopeis overGAININGINPOPULARITYis 1"perfootunlessitispossibletotheuseoffoamed-in-placeurethane nail the insulation or touse mechan insulationforre-roofingjobs,asit icalfasteners.req~iresaminimumofpreparation, PatchingARoofcuttmg labor costs. IF THE ROOF is in verybad con The foam application steps in brief, ditionwithblisters,wrinklesandareasfollows.Thesurfaceis bucklessothatthesurfaceisverybroomedandwashedwithwaterto roughand uneven, it is preferable tore~ove loosedirt andgravel.Upon completely remove the roofing,repairdrymg,the roofshouldbe inspected the deck if necessary,andapplynewcarefullybefore the foamisapplied, BUR and flashings.However,ifthewithbubblescut out andanynecesoldsurface isingenerallygood con sary patching done.Top:J.M\'$ new Rampart Seal-O-Matic Shingle. Atwomancrewcanspray500Botf~m: J-M\'s Regal Roof, with aone-inch strip dition, witha few bad areas, andthesquares in 28 hours, according to onelaminotedtotheboHomofeachshingleto buildingownerdoesnot wishtoex enhance the shadowlineeffect.Both are selfpendthemoneyforacompletere (Continuedonpoge18)sealing. roofing job, a patching job would ex ,tend the roof life in accordance with1 the suggestion made by Will RosenowICOUPONFORRE-ROOFINGLITERATURE in hisarticle tosavemoneyforthe I customer wheneverpossible.Idesiring. additi~nal i?for~ation on any of the products or tools and I Ifpatch job is indicated, the con Re~ders a!ment10nedmthisarticle,mayfillinthecouponbelow,and tractorhasachoiceofusingahoteqmp~entI Iwillhavethemanufacturersfurnishdescriptiveliterature.Mailitto:I we or acoldpatchingmethod.In eitherI AmericanRoofer,221LakeSt.,OakPark.Ill.60302.I case,thearea iscleared ofgravelor debris,andpreparedasin the previ I ousmentionedmethods.ForHot()Machines, Tear-off)Urethane,Foamed-In-PlaceI Patching, thecontractormops on two()HandToolsandSpudBars,Tear-off)ColdPlasticRoofCoatingI stripsofcoatedfeltswithhotas ()LightweightEquipmentforTear-off)Coatings forUrethane ____ _ _I phaltT~ bottomlayershouldex &Patching(showtype)I ()RoofScrapers,Mechanical)RoofShingles______(showItendaminimumof fourinchesbe ()High-Lift - Loadertruckstype orMfr.) yondtheedgesof the crack andthe()Hoists)Roof Drains toplayerat1sixinchesall e a s t()Chutes for removingroofdebris)RoofDrainSiphon Systems around on the sides,with both set in)Other _ _ ____ _ _ ____ ()Otherequipment - -~hot asphalt,flooded withhot asphalt and gravelled.)Insulation,____ _ _ (showkind) Cold Patching uses a plastic cement, which is trowelled1 thick overan /s" area6to8inches beyondeacherid ofthecrack,centeredoverit.ANameofCompany stripof saturated fabric4to6inch: eswideisimbeddedinthecementIndividualNameI completelycoatedoverwithasec: ond"thicklayerofcement,toAddress- - - - 1 ma~eathree coursecoldpatch.ByI addmg another layer of fabricandaCity,State,Zip_ _____ _ _ _ ___ ________Ithird trowelling of cement,the appli I cation becomesafivecourse patch.\' 12SEPTEMBER,1971'