Thermal Movement Please note: Your first comment will be held for moderation/review by our staff before it appears. Be sure to check with the manufacturer before you use any coating with an LRV lower than 55. www.azek.com, Vycom Corporation, 801 Core St., Moosicvk PA 18507, Tel: 570-346-8254 [illustrated above in this article], Custom Decorative Mouldings (CDM) You can’t fasten PVC tight enough to prevent a gap. Read … The frieze is the horizontal trim board along the top of an exterior … Fiber cement is the heaviest and is also brittle. That is the real problem we have to solve, and we solve it by using new woodworking techniques, like priming end cuts (which you now have to do with almost all exterior trim products); by making sure it drains quickly (chamfering or angling flat wood surfaces; rigid flashing (and chamfering the wood beneath the flashing); holding wood 2″ off the shingles; providing a gap behind the wood, between the housewrap and the trim (drainscreen/rainscreen), etc. Exterior House Trim Makes Your House Bedazzle! www.nu-wood.com, Outwater Plastics Industries, Inc. White trim ideas can carry across the exterior of your home for a sense of continuity. damage, such as non decay-resistant softwoods or When repairing trim try to think of how water drains using gravity. The article never really addressed the big question. So if you framed an addition with lumber that had 22% moisture content and then dried to 12% (which is about average), you could count on the 2 x 6 wall studs to shrink about 1/8 in. PVC and Fly Ash products are moving continuously through the day/night cycle, and can work nails loose; wood tends to move on a longer cycle, weeks and months, as the MC changes seasonally. The wood is mostly sapwood, not heart wood; the wood is also mostly facegrain or mixed grain, not vertical grain. Of all exterior trim options, finger jointed material is most readily accepted by builders. the exterior. Workable Substrates. gap between details and then caulked, and fiber cement must also be caulked to seal out water. While trim is often overlooked as an exterior design element, it’s essential to completing the transition from “just another house” to “belle of the block.” When paired with the right siding, trim pulls together exterior features of all shapes and sizes, from roof to front door. NAIL OFF THE SIDING before cutting it back to receive the wider trim boards. We must understand moisture movement and thermal expansion. You can rest assured you’ll get the long-lasting durability you want and a beautiful finish for your exterior trim applications. and 4/4 (3/4-in.) Likewise, 2 x 10 rafters will shrink about 1/4 in. Keep it at least 2 in. More specialized tools are needed for fiber cement. Exterior building trim installation guide, installation methods, and details to avoid trim damage, rot, or loss. Prime all sides, especially the end grain edges. We installed it with tried-and-true methods handed down from previous generations, and for the most part it stayed in place and provided years of trouble-free service. Classic AZEK Trim in Traditional finish is smooth on both sides. PVC exterior trim products from CertainTeed will add the detail you've always wanted to your home. In this case the sub would have been better with lots of glue and minimal screws. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. using trim materials that are vulnerable to decay or moisture x 2 in. Where no clearance space is feasible, such as at vertical window trim abutting a window sill, it is important to seal the end and all other sides of the wood trim before nailing it in place, followed by painting or staining, followed by use of a compatible sealant (caulk) around the joint of wood trim to the horizontal surface. Find the trim … We have no relationship with advertisers, products, or services discussed at this website. -- Adapted with permission from Best Practices Guide to Residential Construction. There are a couple of additional points to the article: It is that it is true that framing shrinks if installed with high MC. Once you select a file, it will be uploaded and attached to the end of your comment. In the end, if it comes down to a tie between two material types with similar characteristics, the deciding factors are: cost, available profiles and sizes, product availability, and warrantees. Some boards are reversible with both finishes, others are not. This house has all the elements of a true 1920’s – 30’s era Craftsman home. AZEK Trim complements the setting so the entire exterior shines brighter. Additional Exterior Trim Installation Materials Choices & Special Installation. The power of every little detail. The second, and nearly as important, purpose is giving aesthetic or visual appeal. 91 [LVL lumber], APA - The Engineered Wood Association [Website: www.pacificwoodlaminates.com ], 7011 So. Is it climate change- then why aren’t the older houses also being affected? The drywall would have stayed tight to the framing when it shrunk. Moisture absorption and thermal movement are the two most important factors that can negatively impact a job if ignored. Better workability compared to wood, fiber cement or engineered wood trim; I spent many of my early years in the day things were simpler fastener, away from head... Your store to see local availability add to Cart use in almost any application in mind both and! 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