Today there are a lot more choices of trim material than there used to be. Use exterior house trim on your front porch to create charm and curb appeal - be the one that has a porch everyone notices! Questions & answers or comments about how to choose, install, maintain or repair exterior building trim. damage, such as non decay-resistant softwoods or The bottom cords in this patio roof dried out and lifted off the joist hangers, pulling the fasteners out of the ceiling boards. If you don’t have a moisture meter, it’s time to buy one. It’s definitely not the good stuff. John Wiley & Sons, 2006. Across all home design styles, the most popular exterior window trim ideas utilize white for its simple, clean beauty. The rule of thumb is that for every 4% change in moisture content, wood moves 1% in size across its width. It’s also important to not simply drape a plastic tarp over the materials, especially if the tarp reaches to the ground. www.azek.com, Vycom Corporation, 801 Core St., Moosicvk PA 18507, Tel: 570-346-8254 [illustrated above in this article], Custom Decorative Mouldings (CDM) How to Paint Exterior Trim, Fascia and Doors Painting your home's trim, fascia, or doors can be easy. Many of us are handling, storing, installing and finishing all of the different types of trim material with old, one-size-fits-all methods. This house has all the elements of a true 1920’s – 30’s era Craftsman home. Best Match. Dimensional wood is the lightest, stiffest and easiest to carry, but it must be stored up off the ground and be kept dry. Price High to Low. Among the best practices for these types of materials are: Poly-ash, and PVC trim are unaffected by moisture. PVC trim is sold in 5/4 (1-in.) www.pwlonline.com, Clear Lam (textured wood facing) and Socomi Lam The wood is mostly sapwood, not heart wood; the wood is also mostly facegrain or mixed grain, not vertical grain. Also exterior trim is found with skirting boards, bats. Poly-ash and PVC trim are not affected by moisture but a gap is still required so that the roofing can dry out. Do you think those drainscreen house wraps like Kimberly Clarks BlockIt are adequate for behind wood siding? When it came to “running trim” or “trimming out” the exterior of a house, we used wood. When it came to “running trim” or “trimming out” the exterior of a house, we used wood. hardboard. Better workability compared to wood, fiber cement or engineered wood trim; Filter & Sort. You can’t fasten PVC tight enough to prevent a gap. Trim – Decorative board around the edges of windows and doors. www.jameshardie.com Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Fasteners move only as much as the point deepest in the wood, and most trim is attached to the framing 2×6 1/2″ ply or OSB that has been installed with 2-1/4″ minimum fasteners. It’s easy to install and can be painted to match the color of your existing siding. We have no relationship with advertisers, products, or services discussed at this website. First and foremost is protecting you from nature’s elements. Customers must be willing to pay for quality wood materials – though the continually increasing costs of the new, alternative materials makes the cost of real wood look better and better. PVC weighs a little less than fiber cement and is very flexible. The fasteners don’t follow the wood, though. If the frame to which it is attached moves enough, it takes the trim with it no matter what type of material it is or how well it has been installed. But the selection may be limited. Additional Exterior Trim Installation Materials Choices & Special Installation. PW, and 4/4 (3/4-in.) Is it the wood itself- wider grain, different species, cut from skinnier trees? As our photographs illustrate just below, the exposed end grain of wood trim is particularly vulnerable to water absorption and subsequent rot as well as insect damage. Compare. stone, Certainteed Read … Advances in building material technology have paved the way for a variety of exterior trim board options. I spent many of my early years in the 70’s & 80’s in Pa. involved with production housing. The article never really addressed the big question. Why don’t we just trim with wood like the old days and have it stay looking fine? The old homes are often just not maintained and look bad, and the new homes with wood siding are peeling paint because of improper installation, no rain screen gap, and inferior materials compared to wood available 75 or more years ago. Things really just aren’t built like they used to be. “The Northeast is one of our hottest markets,” says Keith Kersell, manager of sales and technical services, Pacific Lumber Company (PALCO), Scotia, CA. What happened is that the drywall did stay tight to the framing but the heads of the screws stayed proud and popped the drywall. This is particularly important whenusing trim materials that are vulnerable to decay or moisturedamage, such as non decay-resistant softwoods orhardboard. The power of every little detail. Trim serves to … Neither beveled joints nor mitered joints are a good idea for dimensional wood. Dimensional wood, engineered wood, and fiber cement must be primed on all sides, particularly on the ends when field cut. Plus, get tips for a clean and solid installation. HardiePlank, Hardipanel, fiber-cement shingles, Nichiha Wall Systems But so many of the old houses with wooden siding and wooden trim that look so good and classic are given TLC by the people who live in them. White trim is classic and looks fantastic next to virtually anything, including off-white or cream. and trim, GAF In fact, long sections are difficult to carry by one person on a warm day and by anyone under 6-ft. tall because the ends will drag on the ground even if carried overhead. This is a project that can make the biggest impact in changing your home's appearance. It expands and contracts along its length as the temperature warms and cools. Price Low to High. Ply Gem’s vinyl exterior trim & moulding is durable and virtually maintenance-free. This can easily trap moisture from the ground, which the wood will absorb. Click to Show or Hide Citations & References, Best Practices Guide to Residential Construction, Laminated Veneer Lumber, Overview of the Product, Microllam Laminated Veneer Lumber (LVL) and/or Parallam Parallel Strand Lumber (PSL) MSDS, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. The wood we use today is mostly from juvenile trees, not ones that are 400 years old but 20 years old. When the heat was turned on there were hundreds, no, thousands, of pops. Prime all sides, especially the end grain edges. Be sure to check with the manufacturer before you use any coating with an LRV lower than 55. If you’ve cut and installed wood trim before, you have the moxie to work with PVC trim boards. above the shingles, not the sheathing—which is why this siding is rotting. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also. The more the moisture content changes, the more the wood moves. Not very convincing. For intricate Victorian styles or more subtle designs, INTEX 100% PVC moulding trim lengths are the perfect addition to your exterior moulding and trim project. Moisture Absorption Most outside wood trim is found around windows, doors, fascias, & corner boards. Thanks for posting. Poly-ash and fiber cement can be fastened with a pneumatic finish nailer. 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. Green lumber has a moisture content of 19% or more—30% and even 50% MC isn’t unusual for green lumber! Title (A-Z) Title (Z-A) Brand Name (A-Z) Brand Name (Z-A) Top Seller. Find the trim … Trim boards can be along the floor or around windows and can be flat or ornate. www.resinart.com Best Match. No matter what lumber you buy, proper storage on-site is important to reduce moisture absorption and subsequent shrinkage problems. Provide proper gapping based on ambient temperature and length of trim. We must also have knowledge of new methods and trim materials and how they interact with other construction materials. At below left the building exterior has been ignored so long that not only is there extensive rot to vertical and horizontal trim, we expected (and found) leaks into the walls and wall structure damage from rot and insects. Alexandria Moulding 1-1/4 in. Engineered wood is relatively stiff and must be stored in the same manner as dimensional wood. Home inspectors know that if they were going to select one location to inspect around a window for trim damage, this would be a good one. Fiber-cement lap, vertical, and shingle sidings, and soffits It is welcomed as a less- expensive alternative to solid wood even in the conservative Northeast. Foundation – The structural base that the home sits on, normally concrete. Most of the movement will be wood shrinking away from the head of the fastener, away from the plywood. Trim boards range in size, style and material as well as where they would be placed. Plus, our decorative mouldings are waterproof, termite proof, mold … etc. Keep it at least 2 in. The first portion of this article series includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Bliss, courtesy of Wiley & Sons. Special care needs to be dealt concerning trim boards, laying out what you need to be aware of, so that paint lasts longest time possible. Typically, dimensional lumber is available in varying degrees of moisture content depending on the species, drying practices, and storage conditions. PVC must be installed with gaps depending on the length of the piece and the ambient temperature. The nail may move, but it’s only going to move 1/2 of the amount the inner 3″ of wood moves, so it’s going to be a minimal amount. For example, if the studs, joists, and rafters all have a moisture content of about 15%, then the movement will be negligible. The rest of the older houses with wood panels just look old. -- Adapted with permission from Best Practices Guide to Residential Construction. Fiber-cement lap siding and simulated shakes, brick, and PVC moves due to temperature change. www.permatrimboard.com, Focal Point Architectural Products Typically painted a contrasting color, different than main field color. 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. Dimensional wood, engineered wood, and PVC require a fastener with about a 3/16-in.  "PVC trim holds paint well, resists rot, and looks just like wood", Jim Blahut, Allen, Edward and Joseph Iano. Fundamentals of Building Construction: Fourth Edition. Requirements are detailed at TRIM, EXTERIOR CHOICES, INSTALLATION where we discuss best construction practices in the choice, installation, painting, and maintenance of exterior trim on buildings. Yeah, I agree that no one really wants the upkeep for wood siding anymore. This is where you start to distinguish one trim material from another for the right choice. The drywall would have stayed tight to the framing when it shrunk. The wood has changed. But if the moisture content readings are high, you know the frame will shrink. Screws are nice for PVC and Fly-Ash products because those move because of temperature, and temperature changes happen far more rapidly than moisture content changes. Is it climate change- then why aren’t the older houses also being affected? Dimensional wood, engineered wood, and fiber cement are considered reservoir materials. Duraflex flexible moldings, Pacific Wood Laminates www.certainteed.com Heat is not an issue with storage, but it must be stored up off the ground and kept dry like wood. Moisture absorption and thermal movement are the two most important factors that can negatively impact a job if ignored. You will quickly undo any advantage of buying dried lumber by leaving it on the job site unprotected. NAIL OFF THE SIDING before cutting it back to receive the wider trim boards. Those fasteners are 1-3/4″ into the framing (hopefully). [Click to enlarge any image] The best exterior trim details are designed to keep waterout but to provide easy drainage for any water that penetratesthe exterior. The far left drawing shows a proper exterior scarf joint. Our photo below illustrates soft, deteriorating wood fiber or hardboard exterior trim. InspectAPedia tolerates no conflicts of interest. The best practice that you can follow, which will produce the longest lasting, most durable exterior trim job no matter what type of trim you use, is to read the manufacturer’s instructions. Both homeowners and contractors need to be educated on best installation practices and the consequences of ignorance. AZEK Trim Boards have two finishes: smooth Traditional and woodgrain Frontier. The picture of the deck roof boards with the nails showing is likely a combination of the wood shrinking away from the nail and some truss uplift; the wood doesn’t pull nails from anything because the nails really aren’t moving, the wood is shrinking away. Use for all trim applications including the band board of a siding wall, door trim, window trim and corners. If you are installing trim on a project that you haven’t built yourself, you need to know the lumber’s moisture content in order to anticipate its movement. off decks and roofs. Maybe 1/16 or so. AZEK Trim with PaintPro® Technology and Classic AZEK Trim in Frontier finish are both reversible; one side smooth, one side woodgrain. Only a paint with a light reflective value (LRV) of 55 or higher should be used. the exterior. You can include an image in your comment by uploading it below. However, if the house or addition is new, then there will almost certainly be movement (shrinkage) of the dimensional lumber; how much movement depends on its initial moisture content. Beveled and mitered joints are permitted. Both can be in direct contact with wet surfaces (roofing, decking, the ground) without any adverse effects. The best exterior trim details are designed to keep water off the ground. My second photo (above right) shows the softening and beginning of deterioration where the hardboard siding nail penetrates its surface. NextStone Sandstone 4 ft. x 3.5 in. The drywaller in an effort to do the right thing decided to glue and screw the drywall–a lot. www.gaf.com The absence of zee-flashing between the siding bottom and the horizontal surface of the trim board's top also contribute to trim deterioration: water runs behind and along the trim surface. When combined with moulding accessories, they give any project a clean facade. Our products provide premium PVC performance without the premium price. thicknesses in the common widths found with wood. Even though a concrete sidewalk may be thick and strong, if the ground beneath it moves enough, the sidewalk will shift and crack. That’s why vinyl siding is so popular. This article provides examples of exterior trim rot, delamination, or other damage traced to choice of materials, nailing methods, or omission of adequate flashing or sealant. - be the one that has been completed vinyl exterior trim fine, but none. Store the materials, especially if the tarp reaches to the end edges... 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