AlphaGuard BIO/MT - Tremco Roofing

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INSTALLATION GUIDEAlphaGuard BIO/MTMTLIQUID APPLIED ROOFING SOLUTIONS

Table of ContentsI4-5II6STORAGE & HANDLINGIII7WEATHER RESTRICTIONSIV8PERSONAL PROTECTION EQUIPMENTV9TOOLS & EQUIPMENTVI10PRODUCT LISTVII11PRIMER MATRIXVIII12-13SYSTEM QUALIFICATIONSIX14-26SURFACE PREPARATIONX27-29APPLICATION & INSTALLATIONXI30XII31-45GENERAL OVERVIEWINSPECTION & REPAIRSDETAILS

AlphaGuard MT Plus Roofing SystemAlphaGuard Top CoatAlphaGuard ReinforcementAlphaGuard Base CoatApproved Base SheetApproved AdhesiveApproved CoverboardPolyisocyanurate Insulation SteelDeck (Pictured) or ConcreteAlphaGuard MT Concrete Roofing SystemAlphaGuard Top CoatAlphaGuard ReinforcementAlphaGuard Base CoatConcrete DeckAlphaGuard BIO/MT Restoration SystemAlphaGuard Top CoatAlphaGuard ReinforcementAlphaGuard Base CoatExisting Roof Membrane4

General OverviewAlphaGuard MTAlphaGuard BIOThe AlphaGuard MT System is a liquid-applied,moisture triggered, aliphatic, polyurethaneelastomeric roofing membrane that providesseamless waterproofing.The AlphaGuard BIO System is a liquid-applied,bio-based, two-component, polyurethane roofrestoration system.The unique moisture triggered formula usesmoisture from the air to begin the curing process,but does not rely on moisture for the entirecuring process. This differs from moisture curedurethanes, which needs the moisture for theentire curing process and is susceptible to carbondioxide gassing and pin holing. This makes for amore stable, uniformed cure.This UV resistant, high solid, durable roofingsystem is low odor, low VOC and is field-appliedwith one-part liquid waterproofing layers reinforcedwith fabric. AlphaGuard MT can be fully bondedto a variety of substrates as a maintenance andrestoration system or as a new constructionsystem.Fabric reinforcement is required to providedimensional stability to the cured urethanewaterproofing. Fabric reinforcement will preventpotential shrinkage, especially in high movementflashing areas.The development of AlphaGuard BIO is derivedfrom unique bio-based, polyurethane technology.The high bio-content makes for a sustainable,environmentally responsible roofing product whilethe polyurethane technology offers long-termperformance in the toughest conditions.AlphaGuard BIO is a low VOC product withvirtually no odor, making it ideal for applicationsover occupied space causing little to no disruptionto the building's occupants.The 100% solids, highly reflective, UV resistantconsists of a field applied base and top coat.The two-component technology has a catalyzedcuring process which results in a faster dry times,a more uniform finished film, and negates thepossibility of blistering, gassing, pinholing, etc.AlphaGuard BIO can be installed as amaintenance and restoration system forexisting BUR, MB, and single-ply roofing systems.It is applied in fully-reinforced or partiallyreinforced applications utilizing a glass mat orpolyester reinforcement.5

Storage & HandlingAll AlphaGuard components will be deliveredto the site in original sealed containers. StoreAlphaGuard components in cool, dry spacesoutside of direct sunlight in accordance with localregulations. Store away from heat, open fire, orany ignition sources. In addition, store away fromstrong acids or bases.Rolls must be stored vertically to prevent contactwith water and other contaminants. Optimumstorage temperature is between 60ºF and 90ºF.Shelf life drops at temperatures above this range.In addition, resins risk self-polymerization whenexposed to temperatures above 140ºF.Do not smoke around Geogard Primer andkeep product away from open flame, fire, or anyignition source. Geogard Primer, in particular, isflammable and harmful if inhaled, swallowed orabsorbed through the skin. This can cause skin,eye, and respiratory irritation.6

Weather ceed when there is a threat of precipitationor condensation on the substrate exists.Applying AlphaGuard during or just before aprecipitation event can cause the surface tobecome pitted or distorted.Application of AlphaGuard MT System ispermitted when the ambient temperatureis between 50ºF (10ºC) and 110ºF (43ºC) andthe substrate temperature is a minimum of 5ºFabove the dew point. It is required that overnighttemperatures be above 40ºF (4.4ºC).Application of AlphaGuard BIO System ispermitted when the ambient temperatureis between 45ºF (7ºC) and 110ºF (43ºC) andthe substrate temperature is a minimum of 5ºFabove the dew point. It is required that overnighttemperatures be above 40ºF (4.4ºC).7

Personal Protection EquipmentRefer to the MSDS for each product for specificPPE information.Provide the following to installers: Safety Shoes &Overalls, suitable Hand, Eye, and Ear Protection,and hard hats & appropriate fall protection.Comply with requirements of OSHA, NIOSH orgoverning local authority regarding barricades,retaining ropes, and other safety elements (active/ passive).Use AlphaGuard with adequate ventilation orrespiratory protection as needed to keep exposurebelow TLV values within applications lackingsufficient natural air movements. Protect HVACair intake ducts from infiltration into the buildinginterior. Pre-existing eyes, skin, and respiratoryissues may be aggravated by exposure, and maycause skin and respiratory sensitization.Geogard Primer is flammable and harmful ifinhaled, swallowed or absorbed through theskin. This can cause skin, eye, and respiratoryirritation. Do not smoke around Geogard Primerand keep product away from open flame, fire, orany ignition source.8

Tools & Equipment Blower, Broom, or Vacuum Sockets / Wrenches Chalk Line Squeegees - Flat Blade & ¼” Notched Disposable Rubber Gloves Tap Set Extension Cords Tape measure Garbage Bags Tarps and/or Sheeting Generator Wet Mil Gauge Hand Grinder Water Source Hand Sander Masking Tape Pail Heat Bands Paint Brushes - 4” Paint Roller Cages - 4” & 9” Paint Roller Covers - 4” & 9” - 3/8-1/2” nap Paint Roller Extension Handles Paint Trays Power washer (3,000 psi max) Rags Scarifier (concrete substrates) Scissors and/or Razor Knives Screwdrivers Shot Blaster (concrete substrates)9

Product ListLiquid Applied ProductsAlphaGuard MT Base CoatAlphaGuard MT Top CoatAlphaGuard BIO Base Coat Kits (Part A & B)AlphaGuard BIO Top Coat Kits (Part A & B)Reinforcing MaterialsAlphaGuard Glass Permafab Mat(Polyester Reinforcement)Base Ply AdhesiveBURmastic Adhesive SF (AlphaGuard MT only)Hot AsphaltPOWERply Endure BIO AdhesiveInsulation AdhesiveTremco Low Rise Foam AdhesivePrimersAlphaGuard C-PrimeAlphaGuard M-PrimeAlphaGuard WB PrimerGeogard PrimerTremco Primer/Splice WashTremco Primer/Splice Wash LVSealantsGeogard Seam SealerSolargard Seam SealerTremSEAL HPTremSEAL ProBase PlysBURmastic Composite Ply HT GreenBURmastic Composite Ply Premium GreenBURmastic Composite Ply HT BURmasticComposite Ply Premium BURmasticSupreme Composite Ply POWERply HeavyDuty Base POWERPLY Standard SmoothPOWERply Premium SmoothPOWERply Plus HT SmoothPOWERply 300 SmoothPOWERply SBS Base HWPOWERply SBS Deluxe HWPOWERply APP FR10

WoodMetalConcreteBrickStoneBituminous SurfacesMB Cap SheetsEPDMPVC/TPATPOHypalonPlastic/PVC PipesUrethane Coated SurfacesiceWashAlphaGuard Primer MatrixXXXXXXXXXXX*XXXXXX*When using AlphaGuard WB Primer, a test patch must be utilized to ensure proper adhesion to the substrate.Chart 111

System QualificationsExisting WarrantiesNotify warrantor of extent of work. Do not proceedwith work that will diminish Owner’s protectionunder existing warranties unless directed byOwner.ExaminationExamine existing roofing substrates, with Installerpresent, for compliance with requirements and forother conditions affecting application andperformance of roof coatings. For the record, prepare written report, endorsedby Installer, listing conditions detrimental toperformance. Verify compatibility with and suitability ofsubstrates. Verify that substrates are visibly dry and free ofmoisture. Conduct an IR scan on applicable roofassemblies to identify moisture within the existingroof system. Verify that roofing membrane surfaces haveadequately aged to enable proper bond with basecoat. Verify that roofing membrane is free of blisters,splits, open laps, indications of shrinkage, andpuncture damage or other indications ofimpending roof system failure. Application of fluid-applied membrane indicatesacceptance of surfaces and conditions.PreparationProtect existing roofing system that is indicatednot to receive fluid-applied roofing, and adjacentportions of building and building equipment. Comply with warranty requirements of existingroof membrane manufacturer. Limit traffic and material storage to areas ofexisting roofing membrane that have beenprotected. Maintain temporary protection and leave inplace until replacement roofing has beencompleted.Shut down air intake equipment in the vicinity ofthe Work in coordination with the Owner. Coverair intake louvers before proceeding with coatingwork that could affect indoor air quality or activatesmoke detectors in the duct work. Verify that rooftop utilities and service pipingaffected by the Work have been shut off beforecommencing Work.Maintain roof drains in functioning condition toensure roof drainage at end of each workday.Prevent debris from entering or blocking roofdrains and conductors. Use roof-drain plugsspecifically designed for this purpose. Removeroof-drain plugs at end of each workday, when nowork is taking place, or when rain is forecast. Do not permit water to enter into or underexisting membrane roofing system componentsthat are to remain.12

System QualificationsRoof Coating PreparationMembrane Surface Preparation: Remove aggregate ballast or pavers fromroofing membrane. Remove blisters, ridges, buckles and othersubstrate irregularities from existing roofingmembrane that would inhibit application ofuniform, waterproof coating. Repair membrane at locations whereirregularities have been removed. Broom clean existing substrate. Clean substrate of contaminants such as dirt,debris, oil, and grease that can affect adhesion offluid-applied membrane by power washing atminimum 2,000 psi. Remove existing coatings ifany. Allow to dry thoroughly. Verify that existing substrate is dry beforeproceeding with application of fluid- appliedroofing. Spot check substrates with an electricalcapacitance moisture-detection meter.Existing FlashingsRemove or repair existing base flashings aroundparapets, curbs, walls, and penetrations. Clean substrates of contaminants such asasphalt, sheet materials, dirt, and debris. Do not damage metal counterflashings that areto remain. Replace damaged counterflashingswith counterflashings of like metal, weight/thickness and finish. Repair flashings with like materials. Repair gravel stops, copings and other roofrelated sheet metal and trip elements Resealjoints, replace loose or missing fasteners, andreplace components where required to create awatertight condition.Roof Coating PreparationRoof Patching: Notify Owner each day of extentof roof tear-off proposed and obtain authorizationto proceed. Build-up isolated low spots on existing roofingmembrane with fluid- applied manufacturer’srecommended products to alleviate ponding. Limited Roof Tear-Off: Where indicated, removeexisting roofing membrane and other membraneroofing system components down to the deck. Fillin the tear-off areas to match existing membraneroofing system construction. During removal operations, have sufficient andsuitable materials on-site to facilitate rapidinstallation of temporary protection in the event ofunexpected rain.13

Surface PreparationBefore beginning the project, consider thesubstrates that are present on your project andrefer to the primer matrix (see Chart 1) to selectthe proper primer.The substrate in which you will be roofing mustbe clean and dry. All surfaces should be cleanedwith a power washer (min. 2,000 psi) and acleaning solution that is appropriate for thesubstrate. Any existing roof system should havea thermal IR scan performed. This will ensurethat all areas of concern will be addressed andwet insulation will be removed.ASPHALT BUR / MB SYSTEMSWhen restoring asphalt based roof systems,make all necessary repairs using SolargardSeam Sealer and Permafab. Once all repairshave been made, allow to cure for a minimum of24 hours before applying the AlphaGuardSystem.All surfaces to have AlphaGuard applied, shouldbe power washed (min. 2,000 psi) and all debrisremoved from roof. Once roof is clean and dry,prime all surfaces that are to be treated. Referto the primer matrix (see chart 1) for theappropriate primer for this substrate.For modified bitumen and cap sheet roofs, endlaps and side laps must be treated withAlphaGuard base coat or Solargard SeamSealer at a rate of 50 linear feet/gallon.CONCRETE DECKSWhen applying AlphaGuard to a concretesubstrate, always refer to the InternationalConcrete Repair Institute (ICRI) manual forSelecting and Specifying Concrete SurfacePreparation for Sealers, Coating, and PolymerOverlays no. 03732-1.In order to use AlphaGuard over a concretesubstrate, the surface must be prepared toaccept the roofing system. All grease, oils,asphalt remnants, buildup and debris must beremoved. The surface must be repaired prior toapplying AlphaGuard. All cracks larger than ¼”must be repaired using a rapid set, self-levelingconcrete repair mixture. Allow to properly set anddry before proceeding.Areas that are raised more than ¼”, must beleveled or ground down. This will allow for a leveland sound substrate for AlphaGuard. Thesurface must be shot blasted or scarified toachieve a CSP 3-6 profile (ICRI 03732-1). Thiswill allow the AlphaGuard system to properlyadhere to the substrate.For new concrete substrates, allow a minimum of28 days, and always test the moisture in theconcrete before proceeding with installation ofAlphaGuard.EXISTING URETHANE COATINGSExisting urethane coatings should power washed(min. 2,000 psi) and allowed to dry before anyAlphaGuard is applied. Refer to the primer matrix(see chart 1) for the appropriate primer for thissubstrate. Allow primer to fully dry beforeapplying AlphaGuard to the substrate.14

SINGLE PLY SYSTEMSThe substrate must be inspected for looseflashings, popped fasteners and tearing of themembrane.All single ply substrates must be clean and drybefore any AlphaGuard is applied. The surfacemust be power washed (min. 2,000 psi) andcleaned with a mild detergent (wax free).Remove any walkway pads and make allnecessary repairs before priming the surface.Refer to the primer matrix (see chart 1) for theappropriate primer for this substrate.Wrinkles in EPDM will telegraph through the AlphaGuard system. It isnecessary to make these repairs before applying AlphaGuard.Holes and tears in membranes must be repaired before AlphaGuard isapplied.(Fig. 1)(Fig. 2)White single ply roof, cleaned and ready to be coated with AlphaGuard.15

METAL SURFACESWhen coating a metal surface, all rusted oroxidized areas must be ground to a bright metalsurface. Any painted surfaces should be testedto verify adhesion, either by a small test area orsending a small sample into our lab. Refer to theprimer matrix (see chart 1) for the appropriateprimer for this substrate.WOOD SURFACESAlphaGuard can be applied directly to smallwooden details and walls of wood construction. Ifa wood deck is being utilized, insulation and /or abase sheet must be used. Consult TremcoTechnical Service for the recommendations onyour project.Metal substrates must be clean and primed with M-Prime.BRICK OR STONE SURFACESWhen coating or flashing brick or stone, powerwash the surfaces and remove any loose mortaror protruding surfaces. Refer to the primer matrix(see chart 1) for the appropriate primer for thissubstrate.16

AlphaGuard Application On Concrete DecksMinimum deck thickness for structural concreteis 4".Only poured-in-place concrete that providesbottom side drying is acceptable.Structural Concrete Deck must be structurallysound, dry, and free of grease, oils, coatings,dust, curing compounds and other contaminants.Surface laitance must be removed. The surfacemust be scarified, shot blasted or pressurewashed with high/ultra high pressure. Removeoil, grease smear and asphalt residue withtrisodium phosphate or a strong detergent. Foroil contaminated surfaces, use steam cleaning inconjunction with a strong emulsifying detergent.Rinse thoroughly with potable water.roughened and made absorptive by mechanicalabrasion. Surface profile should be equal to CSP3-6 in accordance with ICRI Guideline 310.2. If it isnot possible to mechanically abrade, acid etch witha 15% Hydrochloric acid solution. After etching,pressure wash or flush the surface with copiousamounts of water to neutralize the surface. Caremust be taken to ensure that all salts and residuefrom the reaction have been removed.The pH of the surface should be checked, as perASTM D 4262, following acid etching. Followingsurface preparation, apply AlphaGuard MT to thecleaned surface in a small area. An ElcometerPull Off Adhesion tester or similar (ASTM D 4541)must be used to test the trial area for properadhesion. Before application of the coating, usethe “Visqueen test” (ASTM D 4263) to evaluatemoisture level in concrete.Allow new structural concrete to cure for a minimumof 28 days. Remove any surface hardener orcuring compounds by using the recommendedmechanical methods for surface preparation.Patch all unsound or defective concrete with repairmortar acceptable to material manufacturer.Prevent dust, vapors, gases, and odors fromentering into the building during roof installation.When shutting down or blocking air intakes,provide makeup air or additional intake air fromsources away from the work area. Coordinatethese procedures with owner’s Representative.Properly prepared concrete substrateRemove defective concrete, honeycombs,cavities, joint cracks, voids and other defectsby routing to sound material. Smooth precastand formed concrete surfaces must be cleaned,Maintain roof drains in functioning condition toensure roof drainage at end of each workday.Prevent debris from entering or blocking roofdrains and conductors. Use roof-drain plugsspecifically designed for this purpose. Removeroof-drain plugs at the end of each workday, whenno work is taking place, or when rain is forecast.Do not permit water to enter into or under existingmembrane roofing system components that areto remain.17

ICRI Surface ProfilesCSP 1(Acid Etched)CSP 2(Grinding)CSP 3(Light Shot blasting)CSP 4(Light Scarification)CSP 5(Medium Shot blasting)CSP 6(Medium Scarification)CSP 7(Heavy Abrasive Blast)CSP 8(Scabbled)CSP 9(Heavy Scarification)Surface profiles are provided by the International Concrete Repair Institute (ICRI). Molded replicas of theseprofiles can be purchased from ICRI at www.ICRI.org.18

GENERAL INSTALLATION REQUIREMENTSALPHAGUARD C-PRIME INSTALLATIONUse products with personal protection equipment.User must read container label and material safetydata sheets prior to use.Mixing: Use clean containers and mixingequipment.atUsing a low speed “Jiffy” type mixer, mix the A &B components separately for approximately oneminute.Use with adequate ventilation. Protect HVAC airintake ducts from infiltration into the building’sinterior.Combine one part by volume Part A with one partby volume “B”. Mix the components thoroughlyfor three to five minutes.Store all materials prior to applicationtemperatures between 60ºF and 90ºFApplication Temperatures:AlphaGuard BIO: 45ºF - 110ºFAlphaGuard MT: 50ºF - 110ºF* Cure times are extended below 50ºFPrevent materials from penetrating substrate joints,entering building, or damaging roofing systemcomponents or adjacent building construction.Scrape the bottom and sides of the mixingcontainer at least once. Do not mix air into theblend. Mix only enough material that can be usedwithin the working life.Application: The ambient and surfacetemperature must be between 50ºF to 90ºF (10ºCto 32.2ºC).Painters tape shall be used to mask detail areas andmetal flashings. Remove tape while AlphaGuardremains wet.Apply to concrete using a short nap roller,squeegee, or brush.All flashings shall be installed first, before the fieldof the roof is covered.Coverage rates may vary depending on concretesurface conditions.After base coat and fiberglass reinforcementhave been installed, and before the top coat isinstalled, a thorough inspection of the surfacemust be conducted by the manufacturer’s technicalrepresentative. The fiberglass reinforcement mustbe completely encapsulated by the base coat, withno pinholes or voids, at the end of each work day.Surface temperature, porosity and texture willdetermine actual material quantities. Ensureprimer does not puddle and substrate hascomplete coverage.Coverage rates of base coat and top coat must becontinuously verified for proper wet film thicknesswith a wet mil gauge.ALPHAGUARD BIO MIXING INSTRUCTIONSCoverage rate of base coat may vary depending onsurface conditions.Raised or exposed fiberglass reinforcement shallbe sanded smooth prior to application of top coat.AlphaGuard base coat can be applied as soon asthe primer has become tack free.Using a low speed “Jiffy” type mixer, mixAlphaGuard BIO Part A for one minute.Combine Part B with Part A in its entirety. Donot breakdown kits into smaller quantities.Mix the components thoroughly until completelyblended (typically 2 minutes). Mix only enoughmaterial that can be used within the pot life19(20-25 minutes).

FLASHING AND STRIPPING INSTALLATIONBase coat and fiberglass reinforcement must beinstalled on all curbs, penetrations, and drainsbefore moving to installation in the field.Install masking tape or similar along the top edgeof flashings where base coat will terminate.Prime all metal surfaces with AlphaGuard MPrime prior to installing flashings.Prime all metal surfaces with M-Prime.Install base coat to flashing surfaces accordingto manufacturer’s written instructions. Extendcoating up vertical surfaces a minimum of 8" andout onto horizontal surfaces 4".Back roll to achieve a minimum wet mil coatingthickness as required by the manufacturer.Install fiberglass reinforcement immediately intowet base coat. Extend reinforcement up verticalsurfaces a minimum of 8" and out onto horizontalsurfaces 4". Install according to manufacturerswritten instructions.Lap adjacent flashing pieces of fiberglass noless than 3". Roll the surface of the fiberglassto completely embed it into the wet base coat.The fiberglass reinforcement must be backrolled to ensure materialsaturates through the reinforcement.Fiberglass must be fully encapsulated in base coat without pin holes,voids, or openings.Tape all edges to provide a straight line for all flashing details.20

ROOF DRAINSRemove drain strainer and clamping ring.Remove all rust and debris from the surface ofdrain bowl. If necessary use a grinder to sandmetal surfaces down to clean, bare, metal.Prime metal surfaces with AlphaGuard M-Prime.Install base coat onto surrounding concrete deckand metal drain bowl flange. Install a target pieceof reinforcement immediately into the wet basecoat and roll to fully embed/saturate the material.After top coat has been installed re-install drainclamping ring and strainer. Replace broken drainring clamping bolts if necessary.21

FLASHING DETAILSAll details are to be completed before the field ofthe roof. Apply the basecoat to the walls,penetrations and curbs before the field of theroof. After the field of the roof has beencompleted with basecoat, apply the topcoat tothe walls, penetrations and curbs, followed bythe field of the roof.Parapet Walls & Coping Walls:Before flashing a wall, be sure that the wall isproperly cleaned and primed as appropriate.Ensure that the wall is of sound constructionbefore flashing.Once substrates are appropriately cleaned andprepared, apply base coat to the substrate, atthe required mil thickness. The base coat shouldonly be applied to the area that you intend toembed the reinforcement into at any given time.Using a roller or brush, fully saturate thereinforcement, working from the center outwards.The AlphaGuard material should extend 8”above the roof substrate, per NRCArecommendations. The toe of the flashing shouldextend 4” onto the roof substrate, allowing for anadequate surface to lap the AlphaGuard fieldbase coat onto the roof substrate, per NRCArecommendations. The toe of the flashing mustextend a minimum 4” onto the roof substrate,allowing for adequate surface for theAlphaGuard field base coat to lap.When encountering a corner, the reinforcementshould wrap by 3-4” and be fully embedded intothe AlphaGuard base coat. Using a brush, workthe reinforcement into the corner. It may benecessary to make relief cuts to form tightly.Inspect the wall and corners for any pinholes orunsaturated areas. If any areas exist, reapply asmall amount of AlphaGuard base coat untilareas are fully saturated.22

Insulated Curbs:Before flashing an insulated curbwith AlphaGuard, one ply of specified base plymust be set in specified adhesive over the curbwall and onto the field of the roof.Remove excess adhesive at laps and allow tocure overnight.Once the adhesive has cured, AlphaGuard canbe applied directly to the base ply. TheAlphaGuard material should extend above thebase ply by at least 1”. The toe of the flashingshould extend 4” onto the roof substrate,allowing for an adequate surface to lap theAlphaGuard field base coat.Wood or Solid Curbs:Once substrates are appropriately cleaned andprepared, apply AlphaGuard base coat to thesubstrate, at the required mil thickness. Thebase coat should only be applied to the area thatyou intend to embed the reinforcement into atany given time. Using a roller or brush, fullysaturate the reinforcement, working from thecenter outwards.When encountering a corner, the reinforcementshould wrap by 3-4” and be fully embedded intothe AlphaGuard base coat. Using a brush, workthe reinforcement into the corner. It may benecessary to make relief cuts to form tightly.Inspect the curb and corners for any pinholes orunsaturated areas. If any areas exist, reapply asmall amount of AlphaGuard basecoat untilareas are fully saturated.The AlphaGuard material should extend 8”above the roof substrate, per NRCArecommendations. The toe of the flashing shouldextend 4” onto the roof substrate, allowing for anadequate surface to lap the AlphaGuard fieldbase coat to lap.When encountering a corner, the reinforcementshould wrap by 3-4” and be fully embedded intothe AlphaGuard base coat. Using a brush, workthe reinforcement into the corner. It may benecessary to make relief cuts to form tightly.Inspect the curb and corners for any pinholes orunsaturated areas. If any areas exist, reapply asmall amount of AlphaGuard base coat untilareas are fully saturated.23

Soil Stacks, Pipe Penetrations andPitch Pockets:All penetrations should be properly prepared bygrinding metal surfaces to a bright metal,removing asphalt residue and priming with theappropriate primers (see chart 1).Once a penetration has been properly prepared,mark them at least 8” above the roof deck. Tapealong these marks to ensure you have a clean,straight line.On round penetrations, cut pieces to sizes thatare manageable and tear the bottom edge, 2-3”from the edge. This will allow the reinforcementto conform to the pipe. Apply the AlphaGuardbase coat and fully embed the reinforcement.The field base coat should extend over the toe ofthe flashing, to the base of the pipe. Oncecured, the AlphaGuard top coat can be applied,followed by the field top coat. On squarepenetrations, cut pieces that are manageable.Cut the pieces to go 8” above the field of the roofand 4” onto the field of the roof. Apply theAlphaGuard base coat and fully embed thereinforcement.The field base coat shouldextend over the toe of the flashing, to the base ofthe pipe. Once cured, the AlphaGuard top coatcan be applied, followed by the field top coat.AlphaGuard as a flashing solution, is compatible with a variety of roofingsystems.Flashing pipes and stands are easy and seamless.Penetrations on MB roof systems can be flashed with AlphaGuard as well.Penetrations that previously needed pitch pockets are flashed withAlphaGuard. This eliminates possible points of water infiltration.24

Internal Roof Drains:Prior to applying AlphaGuard to a roof draindetail, inspect the drain bowl for cracks andholes. Grind the bowl to remove any residualroofing products or asphalt residue. The drainshould have a clean, rust free surface.For insulated roof systems, a base sheetadheredin approved adhesives shouldextend onto the drain bowl to the insideedge of the bowl. The transition from theinsulation board to the drain bowl should bewithin 1/8” vertically and 1/8” horizontally. Atight fit is necessary at the areas.For concrete decks, make sure that the gapbetween the deck and the drain bowl is 1/8” orless. For gaps greater than 1/8”, a urethanesealant should be used to fill the void. Once thedrain is prepared properly, the field base coatand reinforcement should be extended into thedrain past where the ring meets the bowl anddown into the bowl, followed by the top coat.Reinstall the drain bowl and basket once thematerial is completely cured.When flashing a drain, AlphaGuard will conform to the drain bowl,eliminating areas where water can penetrate.For restoration projects, make all necessaryrepairs to the existing drain detail. Ensure thatthe existing roofing material is adhered tightly tothe drain bowl and abutting insulation. Once thedrain is prepared properly, the field base coatand reinforcement should be extended into thedrain past where the ring meets the bowl,followed by the top coat. Reinstall the drain bowland basket once the material is completelycured.For concrete and insulated systems, extend AlphaGuard into the

AlphaGuard BIO The AlphaGuard BIO System is a liquid-applied, bio-based, two-component, polyurethane roof restoration system. The development of AlphaGuard BIO is derived from unique bio-based, polyurethane technology. The high bio-content makes for a sustainable, environmentally responsible roofing product while

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