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Prebuck® Engineered FramingPrebuck@ Engineered Framing is a solution for transitions and terminations of wall systems, providing tested and warranted solutions that can be customized to project design requirements. Specifically engineered for direct contact with concrete and proven non-corrosive to metals, Prebuck guarantees lasting structural integrity. With no risk of delamination, sponginess or diminished fastener strength, Prebuck ensures unwavering durability over time. Its resistance to warping, twisting and cupping, paired with engineered stability and flatness, significantly minimizes labor and material waste while enhancing the overall quality of construction. Product ListingDownload the BrochurePrebuck® Engineered Framing Tremco CPG Brands Tremco CPG Sealants & Waterproofing Roofing Dryvit Nudura More Brands Giraffe Bracing Prebuck Framing PureAir Control Services Education & Training Tools & Calculators Warranties Blog Contact Us Find a Rep or Distributor Products Air & Vapor Barriers Expansion Joints & Transitions Firestopping Gaskets & Extrusions IG Spacers & Edge Sealants Prebuck Engineered Framing Sealants & Adhesives Traffic Coatings Vulkem Roofing Series Waterproofing View All Products Systems Air Barrier Systems Impermeable Vapor-Permeable Commercial Glazing Traffic Systems Balcony & Light Pedestrian Heavy-Duty Pedestrian Heavy-Duty Vehicular Standard Pedestrian Standard Vehicular Waterproofing Systems Cold Fluid-Applied HDPE/Bentonite Hot Fluid-Applied Sheet-Applied Vegetated Roofs Polyurethane-Methacrylate (PUMA) Heavy-Duty Pedestrian Heavy-Duty Vehicular Pool Decks Standard Pedestrian Standard Vehicular Water Features Waterproofing Prebuck Engineered Framing Applications Transportation Restoration Residential Windows Residential Construction Off-Site Construction OEM Commercial Glazing Commercial Construction Services Testing Installation Services Gasket Design Firestopping Resources Education & Training Resource Library View All Resources Tools & Calculators Specifications LEED Letters Distributor Resources Detail Drawings Data Sheets Blogs & Case Studies About Us About Us Our Approach Careers Contact Us Sustainability Education & Training Tools & Calculators Warranties Blog Contact Us Find a Rep or Distributor Back Back Products Find Your Product Air, Vapor & Weather Resistant Barriers Expansion Joints & Transitions Firestopping Gaskets & Extrusions Prebuck Engineered Framing   IG Spacers & Edge Sealants Sealants & Adhesives Traffic Coatings Vulkem Roofing Series Waterproofing & Drainage View All Products Systems Air Barrier Systems Impermeable Vapor-Permeable Commercial Glazing Prebuck Engineered Framing Traffic Systems Balcony & Light Pedestrian Heavy-Duty Pedestrian Heavy-Duty Vehicular Standard Pedestrian Standard Vehicular Waterproofing Systems Cold Fluid-Applied HDPE/Bentonite Hot Fluid-Applied Sheet-Applied Vegetated Roofs Polyurethane-Methacrylate (PUMA) Heavy-Duty Pedestrian Heavy-Duty Vehicular Pool Decks Standard Pedestrian Standard Vehicular Water Features Waterproofing Applications Commercial Construction Commercial Glazing OEM Off-Site Construction Residential Construction Residential Windows Restoration Transportation Services Services Education & Training Firestopping Resources Gasket Design Installation Services Testing See Training Options Resources Resources Blogs & Case Studies Distributor Resources Product Literature Quick Links   Submittal Builder Technical Documents Tools & Calculators Warranty Documents See All Resources About Us About Us Our Approach Careers Contact Us Sustainability See How We Do It Education & Training Tools & Calculators Warranties Blog Contact Us Find a Rep or Distributor Home / Prebuck® Engineered Framing Prebuck® Engineered Framing Prebuck® Engineered Framing is a solution for transitions and terminations of wall systems, providing tested and warranted solutions that can be customized to project design requirements. Specifically engineered for direct contact with concrete and proven non-corrosive to metals, Prebuck guarantees lasting structural integrity. With no risk of delamination, sponginess or diminished fastener strength, Prebuck ensures unwavering durability over time. Its resistance to warping, twisting and cupping, paired with engineered stability and flatness, significantly minimizes labor and material waste while enhancing the overall quality of construction.  Product Listing Download the Brochure A B C A: Parapet Cap The Parapet Cap provides an engineered solution for terminating parapet wall assemblies, interfacing with framing, air barriers, roofing, and finish materials. B: Window & Door Bucking Provides an engineered solution for punched openings. It ensures stable support for glazing and finish components and is ideal for wide-width walls like ICF.   C: Wet-Set Sill Plate The Wet-Set Sill Plate provides a durable, straight solution for sill plates. Designed to fit ICF wall widths and can be set the same day walls are poured.   Prebuck® Engineered Framing Jump to: Current Active Link Benefits of Prebuck Engineered Framing Systems Produced Straight Our bucking is produced straight and stays straight. It will not cup, warp or twist over time. Designed for Direct Contact These products are non-corrosive to metals and are designed for direct contact to concrete.   Durable Will not delaminated, become spongy or lose fastener holding strength when exposed in typical commercial construction. System Properties ASTM D1037: Density 38 ASTM D1037: Product Moisture Content 6 to 8% ASTM E518: Thermal Properties 1.25 ASTM E84: Flame Spread 140 AWPA Category 2: Use in Direct Contact with Concrete Pass Specific Gravity - Edge .42 Prebuck's Knock down KitsPrebuck Knock Down Kits provide contractors the strength and durability of Prebuck, with the added advantage of each unit being cut to length. These kits eliminate the time-consuming process of measuring each board, cutting each piece and the waste created. Let Prebuck minimize your on-site labor, reduce employee risks and create less scrap.Download Brochure Products That Make Up This System Prebuck® Parapet Cap Treated Laminated Strand Lumber (LSL) Framing  Prebuck® Sill Plate Treated Laminated Strand Lumber (LSL) Framing  Prebuck® Window and Door Buck Treated Laminated Strand Lumber (LSL) Framing  Parapet Cap Installation Time StudyDiscover how Prebuck's innovative parapet cap solution offers significant time savings compared to traditional installation methods. Filmed at our Building Science Lab in Beachwood, Ohio, we dive into a detailed time study contrasting the conventional parapet cap installation techniques with Prebuck.  Prebuck Engineered Framing Resources Download any of these featured resources or find a specific type of document below. Parapet Cap Product Guide Knock Down Sell Sheet Parapet Cap Technical Data Sheet Window & Door Buck Technical Data Sheet Prebuck Framing Systems Frequently Asked Questions What is Prebuck made from? Prebuck is manufactured from Laminated Strand Lumber (LSL) that is pressed and glued using MDI resin. This resin forms a plastic binder between the structural strands of lumber, providing an engineered framing solution designed to resist twisting, warping, and cupping. What is Laminated Strand Lumber (LSL)? Laminated Strand Lumber (LSL) is an engineered wood product. It is a structural composite formed by bonding thin parallel veneers together in large billets and cutting to dimension based on intended use. What dimensions are Prebuck products available in? Prebuck products come in standard lengths of 16". Widths can be customized based on the design for the project. Prebuck also offers packages cut to length for window and door bucking. Can Prebuck be left exposed? Prebuck can be exposed during normal construction cycles; however, it is required to be covered by a finish material. Is Prebuck designed to be used in direct contact with concrete? Prebuck zinc borate treated option is approved to be used in accordance with AWPA Use Category UC2. This treatment allows Prebuck products to be used within the building envelope and in direct contact with masonry or concrete surfaces. Are special fasteners needed when working with Prebuck? The zinc borate treatment used in Prebuck is non-corrosive; therefore, no specially coated fasteners are required. Can Prebuck products be used in contact with or below the ground? Prebuck products treated with zinc borate must not be used in exposed exterior conditions or in direct ground contact applications. How long can Prebuck products be left exposed during construction? Typical exposure during construction is expected. The product may discolor, and edge swelling is possible; however, the structural integrity is not compromised. Prebuck recommends care is taken to limit exposure to the elements and that coverings be applied within 6 mo. Do cut ends need to be treated after being cut on-site? No, the zinc borate treatment is present throughout the cross-section of Prebuck and requires no further treatment to cut edges or other modifications made on-site. Will Prebuck swell? Prebuck is made with MDI resin that produces a plastic coating over the structural strands of lumber. When exposed for periods of weathering and moisture the edges of the material may swell but are warranted against swelling more than 3/16”. Length and width of the material will not change in dimension. How do I order Prebuck products? To order Prebuck products for your project, click HERE to contact your local Tremco rep or Nudura distributor. Or submit a Prebuck order inquiry using the form below or by calling 616.309.6256 during normal business hours, 8:30 am to 5:00 pm (ET). Contact Us Today!For answers to your questions and immediate ordering, please send us a message using this form or call 616.309.6256. Looking to have an estimate completed? Email your plans to prebuckestimating@tremcoinc.com. Discover Our Product WarrantyHave peace of mind with Tremco's One WarrantyLearn More Need help finding the right product?Talk to a Tremco representative todayGet in touch Sign up for our newsletterSubscribe to get all of the latest news and updates straight to your email. Products Services Resources About Us Education & Training Tools & Calculators Warranties Blog Contact Us Careers 3735 Green Road Beachwood, OH 44122 (800) 321-7906 © 2025 Tremco. All rights reserved. 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