POWERply™ Heavy Duty Base Sheet - Tremco Roofing

POWERply ® Heavy Duty Base SheetA Smooth Surfaced, Fiberglass BilaminateReinforced Modified Bitumen MembraneComposition: POWERply ® Heavy Duty Base Sheetis a smooth surfaced high strength modified bitumenmembrane. POWERply Heavy Duty BaseSheet is constructed with a non woven fiberglassmat/fiberglass scrim bilaminate reinforcement.The asphalt coating is modified with an SBS elastomer.POWERply Heavy Duty Base Sheet isasbestos free and exceeds the requirements ofASTM D6163, Type III, Grade S, and exceeds therequirements of ASTM D6163, Type III, Grade S.Basic Uses: POWERply Heavy Duty Base Sheet isdesigned for application in hot applied asphaltadhesives in modified bitumen systems where ahigh tensile modified base sheet or flashing ply isdesired.POWERply Heavy Duty Base Sheet can also beused as a base ply or flashing ply in a cold processmodified bitumen roof system.Limitations:• The use of phased construction techniques isnot permitted.• Not intended to perform under ponding conditions.Positive drainage is required.• Not to be exposed to solvents, oils, or other concontaminantsharmful to asphaltic materials.• Backnail on roofs with slopes 2:12 (2'' per foot),or greater.Dimensions: POWERply Heavy Duty Base Sheet rollsize is 100 sq ft/roll (9.3 m 2 ) applied, with rolldimensions of 3' X 36' (915 mm X 10.95 m). RollFeaturesPolymer modifiedasphaltBilaminate Glass fiberreinforcedProduct AdvantagesBenefits• Resists thermalshock and splitting• Strong, nonrottingply.Superior Strengthfor long term performancethickness is 3.0 mm. Roll weight is 103 lbs.(46.8kg).Packaging: POWERply Heavy Duty Base Sheet isavailable in pallets, with 20 rolls per pallet.APPLICATION DATA:Roof replacement usually involves more complexitiesthan new construction roofing.Contingencies such as rusted or deteriorateddecks, rotted wood components, rooftop equipmentwhich cannot be moved or shut down, andnumerous other conditions are often encountered.The following application information is designedto serve as a general guide. Your local TremcoRepresentative will prepare detailed specificationsbased on the condition of your roof.Structural Deck: Deck must be properly designedand structurally sound.Drainage: Ponding conditions are unacceptableand will adversely affect performance of any roofingsystem. Where positive drainage does notexist, water removal from roof surface must befacilitated by lowering drains, tapered insulation,or an approved lightweight insulating concreteslope system.Insulation: Insulation must be dry and kept dry.No more insulation shall be installed than can becovered in that day. Use of FAS-n-FREE ® Adhesivefor solvent free, fastener free insulation attachmentis the preferred method of securementunless otherwise specified.Installation Procedures: According to job specifications,prepare the surface to be covered:• Replace areas of wet insulation, deteriorateddeck and wood components.• Install roof insulation or nailed base sheet andmulti-ply base ply system.Plan the placement of POWERply Heavy Duty BaseSheet to ensure that water flows over or along,but not against, the exposed edges.Phased construction is not permitted. All roofmembrane layers specified must be installed thesame day.Smooth surfaceUL Classified• Can be surfacedwith a variety offinishes• Fire ProtectionRoofing & Weatherproofing Peace of Mind

Base Sheet Application: Cut POWERply HeavyDuty Base Sheet into 16’-18’ (4.9-5.5 m) lengthsmaximum. Allow lengths to relay.Above 55°F (13°C) : 30 minutes minimumBelow 55°F (13°C) : 60 minutes minimumFor hot applications, the adhesive temperaturemust be at the EVT or 425°F (218°C) at the pointof application-whichever is greater. THERMastic,THERMastic 50, POWERply Modified Hot MeltAdhesive, and Premium IV Asphalt are recommendedas hot applied adhesives for POWERplyHeavy Duty Base Sheet. Hot applied modifiedbitumen membranes require special applicationtechniques under cool ambient temperaturesand/or moderate wind conditions.Starting at the low point of the roof, embedPOWERply Heavy Duty Base Sheet in a uniform andcontinuous application of adhesive. Press the membraneinto the adhesive using a minimum 75pound weighted roller to assure full contact of theback of the membrane into the adhesive. Ply shallnever touch ply.Side laps 4'' (102 mm) minimum; end laps 6''(152 mm) minimum. Offset membrane laps fromthe ply sheet laps. Stagger end laps at least 36''(914mm). To assure complete and uniform adhesionat lap edges, adhesive should exude past lapedges. Install flashings as specified.Coverage Rates:•Hot melt interply application rate: 25 lb/100 ft 2(1.25 kg/m 2 )•Cold adhesive interply application rate: 1.5 - 2.0gal/100 ft 2 (0.6 - 0.8 L/m 2 )Precautions: Users must read container labels andMaterial Safety Data Sheets for health and safetyprecautions prior to use.Availability and Cost: Contact your local TremcoRoofing Representative for pricing and availability.For the name and number of your Representative,call the Roofing Division at 216/292-5000.Maintenance: Your local Tremco RoofingRepresentative can provide you with effectivemaintenance procedures which may vary,depending upon specific conditions. Periodicinspections, early repairs and preventative maintenanceare all part of a sound roof program.Guarantee/Warranty: Tremco, Incorporatedwarrants POWERply Heavy Duty Base Sheet to befree of defects and to meet published physicalproperties when tested according to ASTM andTremco standards.Under this warranty, any product that is proved tobe defective when applied in accordance with ourwritten instructions, and in applications recommendedby Tremco as suitable for this productwill be replaced with like product at no charge.THIS IS BUYERS SOLE AND EXCLUSIVE REMEDY.All claims concerning product defects must bemade in writing within twelve (12) months ofPhysical Performance CharacteristicsPOWERply ® Heavy Duty Base SheetProperty Typical Value Test MethodTensile strength 220 lbf/in/MD ASTM D5147@ 0°F (18°C) 190 lbf/in/XMDElongation 3% MD ASTM D5147@ 0°F (18°C) 3.5% XMDLow temperature -5°F ASTM D5147flexibility(-20°C)Thickness 3.0 mm (0.120 in) ASTM D5147Tear strength 220 lbf (977N) MD ASTM D5147@ 77°F (25°C) 240 lbf (1065N) MDshipment. The absence of such claims in writingduring this period will constitute a waiver of allclaims with respect to such product.This warranty shall be IN LIEU OF any other warranty,express or implied, including but not limitedto, any implied warranty of MERCHANTABILITYOR FITNESS FOR A PARTICULAR PURPOSE.Technical Services: Your local TremcoRepresentative, working with the Technical ServiceStaff, can help analyze conditions and needs todevelop recommendations for special applications.The services of the Tremco Research Center,which has earned a unique reputation in weatherproofingtechnology, complement and extend theservices of the Tremco Technical Service staff.Statement of Policy and Responsibility: Tremcotakes responsibility for furnishing quality materialsand for providing specifications and recommendationsfor their proper installation.As neither Tremco itself not its Representativespractice architecture or engineering, Tremco offersno opinion on, and expressly disclaims anyresponsibility for the soundness of any structureon which its products may be applied. If questionsarise as to the soundness of a structure or itsability to support a planned installation properly,the Owner should obtain the opinion of competentstructural engineers before proceeding.Tremco accepts no liability for any structural failureor for resultant damages, and no TremcoRepresentative is authorized to vary this disclaimer.3735 Green RoadBeachwood, OH 44122216-292-5000220 Wicksteed AveToronto, ONT M4H 1G7416-421-3300R00-385 Rev. 2/13Printed in USA