The house is a quasi split level built probably back In the 50s. As we explained earlier, that installing shingles over a wet roof will invalidate any warranty you might be given from the shingle manufacturer. While there are certain types that are water-resistant such as marine plywood… Or does all of it have to be ripped off. In this case, your plywood may be ruined and you might have to use it on parts that don’t require visual perfection. If it’s been raining, time is the only way to ensure damage control is met. Although extensive rain periods can be problematic if you see the plywood edges start to de-laminate. It is an ideal sheathing panel in both visible and non-visible roof constructions. A wet installation can also cause a new roof to fail. Typically, softwood plywood is not suggested for outdoor use. When plywood gets wet, it swells evenly across the plywood sheet, and then when it dries out it goes back to the normal sizing. I used this same process for my plywood and it worked a treat. Overall, plywood is a little bit better for roofing. If you bought good plywood and you wanted to stain and finish it, then this can be a problem. Plywood will last many more years if it is properly sealed especially if you are doing an outdoor project. As a highly reputable company, we offer a variety of services for commercial and residential properties throughout the state. OFFICE: 303.443.5843 Go. It also uses waterproof glue but excessive amounts of water over time can lead to its demise. In This video I show how to replace rotten plywood on your roof without breaking your back! Contact us directly at (303) 443-5843. I am the guy behind Woodwork Hubby! Once this has done we can then discuss how we go about drying it out. Because the weather in the Centennial State can be volatile, preparation is key. I hope this article was of benefit to you and helped you understand more about plywood getting wet. When the workers returned to the attic, they most likely added a 2- by 4-inch block between two or more of the rafters and then tried to secure the warped edge of the plywood using wood screws. OSB takes much longer to dry out and tends to retain moisture, which can cause it to degrade a lot faster than plywood. In some cases, you may not be able to sand it out. From building homes to creating decks to crafting particular items, plywood is relatively inexpensive, durable, and comes in different types that are flexible for your needs. Rain can be extremely unforgiving, but the good news is, it won’t last forever. Chances are, the shingles on your roof were attached on top of a plywood base. I'm doing a lot of the work myself, help from a metal roofer with other skills. In general, the ideal weather conditions for roofing are clear, warm days. Providers of Colorado residential roofing services should have a plan in place to handle extreme weather, especially if roof work is already underway. You also should consider the design parameters of the roof to ensure that the extra weight of the added plywood is well within the static load capability of the roof support structure. Contact B&M Roofing in Colorado. If you press on the plywood and find it spongy all through it, then your plywood has de-laminated and will be ruined. Decking should be in place before other roof materials can be applied. painting the plywood I highly recommend this article for the best results. Simply look along the surface to see if this is an issue for you. I have been doing woodworking for over 30 years. Although extensive rain periods can be problematic if you see the plywood edges start to de-laminate. The warranty will usually vary by roofing type such as asphalt shingles, metal, tile, or shake and usually ranges from 25 to 50 years. On one hand, B&M Roofing specializes in hail damage and repair, so we’re always adequately prepared for those fixes and scenarios. There are several nightmare cases a year or two ago in the Home > Roofing section of Browse Projects about that. In most cases, this de-laminating will only inform the edge about 50mm (2″) and you should be able to cut this off before using the sheet. The most common materials for this are oriented strand board (OSB) or plywood. This form of plywood has hardwood layers instead of softwood so it will take much more exposure to water. What makes this product really amazing is its resistance to water. HomeFix column by Dwight Barnett advises a reader that his roof problem is likely the result of installing shingles over wet plywood. Plywood is mostly available in 6, 9, 12, 17, 19, 25, 33mm thicknesses. If it starts to rain or drizzle, the roofers should act quickly to cover your OSB – most likely with a tarp. This often happens when plywood is stored outside for short periods of time before a project begins. However, a damaged roof isn’t the only worry when roofing in the rain. The alternating layers make plywood a good strong sheet material for almost any project whether its furniture making or subfloor applications. But like all wood, each layer of the plywood can absorb moisture, whether from direct contact or through … More often than not, this plywood will get rained on before the roof is on which begs the question, can plywood get wet during construction? The airflow was obstructed from the soffit vents to the ridge vent by too much insulation and no baffling. I thought I would share my experience and how I managed to save those sheets. It's 5/8" CDX. If a roofing installer decides to work under less-than-ideal weather conditions, such as rain, it could lead to your manufacturer voiding their warranty. It doesn’t mean it’s impossible to install a reliable roof in adverse conditions, just that more precaution and measures should be taken during inclement weather. Framing or structural plywood that has an A grade glue bond will stand up to quite a lot of moisture before it is affected. Should I use CDX or OSB for roofing plywood? I am using a 7/16" OSB Sheathing that I got from Lowe's. What other impacts does roofing in the rain carry? The type of plywood you have can also affect the rate at which the water will absorb. Sometimes referred to as roof sheathing or a roof deck, this plywood acts as a foundation for the layers of underlay and the shingles on your roof and connects the roof to the frame of the house. The best bet is hiring an insured, safe roofer. You've only seen one page. The other day I was bringing some home from the store when I got caught in a storm. I used 5/8″ tongue and groove nailed for the roof. AdvanTech can sit in the rain … This is why plywood is considered as the better option for roofing. The last thing to tell if your plywood is ruined is the edges will usually start swelling or de-laminating. It normally gets plenty of sunny days to dry out so this plywood getting wet is not too much of an issue. If your plywood is exposed to extended periods of rain, the wood will start to swell and deform and the layers can start coming apart. First, they should make every attempt to cover the roof decking and other exposed materials. Furthermore, sanding a roof deck is almost impossible because of the interference from protruding nails. The thinner plywood, … If you’ve ever built or had a house built in a wet area of the country you know that traditional plywood or OSB can swell when it gets wet. Check out this post which is one of the most popular of all time. To discover how I saved my plywood sheets, keep reading the information I have put together. While the glue is waterproof, the wood fibers are not. It may take several hours but water will eventually soak through the layers of the wood. Contact Info A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. An experienced roofer can help you pick out the right one, but it’s good for you to know what these options are. In these instances, be sure you’re working with a roof that considers all possibilities and has a dedicated backup plan in the event of inclement weather. Some bays have small amount of mold some dont. Of course it's been raining this weekend and my newly sheeted roof is getting wet. This raises a question, can plywood get wet? Next Last. Delaying a repair or replacement for a few days is well worth the wait. Sanding wood building surfaces such as plywood or tongue and groove roof sheathing, wall sheathing, or wood framing is usually unnecessary and inappropriate. I can tell some of the pieces are bowed bit at the edges now. And in case you’re wondering, yes, the I-joists holding up the subfloor also got wet (primarily the plywood caps, not so much the OSB ribs). With any excess water on wooden products, you will notice dark stains throughout the sheets. Different Material Options & Types of Roof Plywood. Oy. It does exist and it is called Marine Grade Plywood or often called Marine Ply. The roof itself is not bad. Emergency roofing repairs should make immediate fixes to protect your home from extensive damage. I. ianphilip007-Apr 25, 2012 #1 Welcome to ElectriciansForums.net - The American Electrical Advice Forum Head straight to the main forums to chat by click here: American Electrical Advice Forum. Once plywood has become wet, you must encourage the water that has soaked into the wood fibers to evaporate to make it dry again. Framing or structural plywood that has an A grade glue bond will stand up to quite a lot of moisture before it is affected. This raises a question, can plywood get wet? Prolonged exposure to rain can cause the softwood layers to de-laminate. B & M Roofing of Colorado, Inc. A reputable company will provide details for both: Manufacturer warranties will guarantee the durability of the roofing material you’ve selected for your home. Once you have completed the above steps your plywood should be completely dry and ready for use. It normally gets plenty of sunny days to dry out so this plywood getting wet is not too much of an issue. The top 3 sheets of plywood got wet and were actually soaked in water. Professionals set roofs’ rafters 2 feet apart, whereas the plywood decking is placed with a minimum thickness of 7/16 inch. As a professional roofer, roofing in the rain is not an ideal setting. These layers help give the material its strength, and ensure that it remains stable enough to be used for many different purposes, from creating a roof deck to building cabinets. Rainstorms can cause water damage to the roof decking. Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. OSB takes longer to get wet than plywood but also takes longer to dry out. foot and with a maximum of spacing of 16 inches between rafters. And boy was it. Shingles and roofing materials may not adhere properly to slick surfaces with high humidity. Actual plywood is a better product IMO than OSB which is the least expensive sheathing and why used. The important thing is too keep it covered up and remove any excess water straight away. The roof has just a few pan vents and no soffit vents. You may have heard of roof decking but have no idea what it is or why it is as important as it is to your roof. The plywood is nailed to the roof rafters, and unless the builder used a tongue-and-groove plywood or "H" clips, the long edge can warp in between each rafter. Plywood has a slight advantage with stiffness. Plywood is an excellent material that is used in different types of construction. If your plywood has taken on a lot of water then you will most likely have severe warping or cupping in the sheets. If you didn’t already know, new roof installations usually (and should) come with two types of roofing warranties. There is a fairly new roof on it with continuous ridge venting. The edges will also have the most severe discoloration. The 10 Best “How-To” Books For Woodworking Beginners. Note: Colorado is notorious for hail and rainstorms. Unfortunately, storms can wreak havoc on homes throughout Colorado state, costing thousands in damages and repairs. Think twice before you hire roofers that appear to be in a rush. Can You Roof Over Wet Plywood? A home or commercial building can sustain water damage during roof replacement if rainy conditions are too frequent. 2x6 rafters no overhang therefore no soffit or venting. If you are just leaving your plywood dry out without the use of a fan or heater, then it could take a couple of weeks to dry out. Could the roof actually stay wet all that long since the venting … When planning to redo your roof or repair some damages, you might come across different grades and types of wood, such as OSB and CDX and start wondering what those abbreviations mean. Excessive indoor humidity can cause blistering and peeling paint, warping and rotting wood, as well as the formation of mildew & mold. The plywood is NOT rotted. Metsä Wood Spruce plywood is the perfect roofing plywood. If you use the above method I mentioned, then your plywood should be completely dry within a few days. Swollen edges have been … Don’t be fooled thinking it is perfectly waterproof though. OSB vs Plywood Screw Holding What type of damage can be done when roofing in the rain? This will ensure that the strength of the plywood is enough to bridge spots on the roof where the old plywood was weakened to the point that it would sag under the load on the roof. Other issues that can occur such as rain create slippery conditions that make roof-work hazardous. If the sheathing or wood is wet during the time of installation, it can trap moisture inside of your roof, leading to mold, rot, or other severe problems. The shingle installation looks good. Only one piece near the front corner looks bad (starting to delaminate) and the rest looks okay at the moment. About 1/4 of the roof sheathing has mold growth on it and has about 60% moisture content. One disadvantage is that most plywood is not waterproof. Colorado’s extreme weather is often a sore spot for many roofers. These excellent how-to books for woodworking can... MDF seems to be the one thing that scares most people whenever they need to screw into its edge. Post pics... you may have no problem and it may be … While the glue is mostly waterproof, excess rain can cause the glue to fail. Why? If however your plywood has sat outside in the rain for a couple of days, the chances of it being any good are slim. Some Marine plywoods are guaranteed for 15-25 years but will depend on your use and location. Discuss plywood on garage roof in the Electrical Forum area at ElectriciansForums.net. 1 Stack loose sheets of wet plywood in … I decided to start this site to educate others on the things I have learnt. The new idea is to place the sheathing in between insulation so it does not condense water out of moist air. Softwood plywood is also used for shelving, temporary flooring, and sheds. Together with a trade qualification in Cabinetmaking, I feel I can make your time in the workshop more enjoyable! That said, there are many instances where the rain is unavoidable and unpredictable. It is more ‘water-resistant’. The most common materials for this are oriented strand board (OSB) or plywood. Steps should be taken to protect existing materials and completed work. The client claimed the underside of the roof deck was wet. I use plywood in my workshop quite a lot for making jigs and some furniture. Even though the wood is porous, it is more natural and it can dry quickly. Frederick, CO 80516 1; 2; 3; Next. Storms also entice dishonest roofing contractors who are looking to scam panicked homeowners. What they … However, if this roof decking starts getting wet, it can start to rot and impact the entirety of your roof. If your plywood has only been exposed to a few hours of moisture or water than it can be saved. A tear-off and replacement of fiberglass shingles was performed on this roof about 6 months ago. It may have some dark discoloring around the edges where the water has started to soak in. So maybe you have dried your plywood out as much as possible, but what are the signs that my plywood has been ruined and can’t be saved? Valuable books on beginner woodworking exist for every skill level. We have lots more on the site to show you. 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