- Mark Twain. Do not start the sander with the drum contacting the floor, because the sander can gouge out the floor. 210 joists 16 on center, 11 span, x brasing, 3/4 cdx T&G sub floor. To remove wave, the first cut should be on a steep angle, followed by straight cuts, followed by use of a hard plate, multi-disc or planetary sander. It's a job best done with a specialty floor sander. I wouldn't call them that per say. It is also an excellent project to prepare a home for real estate showings. And safety glasses are a mustdrum sanders create sparks when they hit nails and are capable of shooting particles.
Sounds TOO familiar. Identifying and Correcting Sanding Imperfections, National Wood Flooring Association (NWFA), Product Selector a Highlight of Taylors Revamped Website, Case Study: Wilbur O. and Ann Powers College of Business, Clemson University, Clemson, SC, Contractor Issues: How to Prepare for a Legal Action, Training a Fundamental Part of NTCA Membership Benefits. The National Wood Flooring Association has detailed information about sanding and finishing wood floors available through our online training platform NWFA University. Lift the front cover of the sander and slide the sleeve onto the drum roller. Other causes include flooring installed parallel with floor joists; insufficient or loose fasteners, incorrect fastening schedules, etc. Overlapping your passes will ensure that you don't miss any spots and you end up with any uneven sanding areas. Use a hard plate, multi-disc or planetary sander to alleviate sanding marks and minimize dishout. Use of a hard plate, multi-disc or planetary sander also will help alleviate some sanding marks. With the tool turned off, practice raising the sanding drum by whatever method is appropriate for your sander, moving it to different positions on the floor, then lowering the drum back onto the floor. There are advance sanding tricks fromnot having to do, all this work. This will take longer to complete. Nationally, complete floor refinishing typically costs $3 to $8 per square foot. Professional floor sanding services are widely available, and they usually offer a full range of floor finishing services, including staining and varnishing. There is a limit to what sanding can accomplish when it comes to restoring a hardwood floor to like-new condition. 
DIY floor sanding with a drum sander is entirely possible for a DIYer with moderate skills and stamina, but keep in mind that this is a large, powerful tool that can easily damage a floor unless you understand how to use it correctly. With G & S Floors, you will experience optimum personal service, with superlative, effective premium quality workmanship in the industry and high quality products. Other culprits can include running the machine outside of manufacturers recommendations; heeling the buffer; improper clocking of the buffer or edger; grit or debris left behind on the flooring that wasnt adequately vacuumed or otherwise removed during the sanding process; or skipping steps in the sanding process altogether. Even though the drum sander has a dust bag, the bag only collects the majority of dust, not all of it. You got a newbie I suspect. They are all available for lease at major home centers and tool rental outlets. Sweep and vacuum up all loose wood particles. Put 100-grit sandpaper in the drum sander. Sounds like what we call 'stop marks', they're from when the big sander stops moving forward and momentarily stops and starts moving backward. While floor sanders are readily available for rental, floor sanding requires careful technique, and it's quite easy to badly damage a floor if you hurry the work. Loose wood particles kicked up by the sander could get under the skin or in the eyes. After, you've completed the hardwood floor sanding, clean debris if, necessary. Now, you will pull the tool backward along the same path to complete the sanding pass over the same section of floor. If the cause of the issue is with the equipment, abrasives, or jobsite, it must be corrected prior to attempting repairs. If the cause of wave is related to structural or power issues, these must be corrected before attempting repairs. Although drum sanders have dust-collection bags, a considerably amount of dust will be raised. Sand with the grain of the wood floor. Before beginning on your actual hardwood floor, it is a good idea to practice drum sanding technique on a sheet of plywood laid on the floor. These marks, also known as chatter marks, can be difficult to remove, especially if they are fairly deep into the wood. Vise-versa, if, it sands, heavy on the right-side of the drum. Read our, Learn How to Sand Hardwood Floors Yourself, Sanders to Use When Refinishing Hardwood Floors, How Much It Costs to Refinish Hardwood Floors, How to Get Cat Urine Odor out of Wood Floors, How to Prepare a Vinyl Floor for Ceramic Tile, How to Protect Hardwood Floors From Damage, How to Sand Your Wood Deck Before Refinishing. If board replacements are necessary, do this now. Once the flooring boards are even and the old finish have been completely removed. You may also want to cover electrical outlets with tape to prevent dust from infiltrating the slots. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. They are typically leased in four-hour or full-day increments. Conclude by changing the sanding sleeve to fine-grit (120-grit), then make a third pass of the entire room. Rose, Expert insights on techniques and principles. Any one know what is causing the sanding marks? With the sanding drum raised and the motor still running, reposition the sander about 4 inches to the side, then repeat the same forward-and-backward action to make the next pass. You can have someone assist you with the power cable, to prevent tripping over it. 
Most sanding sleeves will sand 100 to 400 square feet before they need to be changed.
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Causes of wave can include the structural integrity of the floor being sanded or subfloor beneath it; foreign objects stuck on sander wheels/wheels out-of-round; knots or density differentials in the flooring, causing sanding inconsistencies; poorly maintained machine; power surges during operation/inadequate power; improper big machine sanding techniques; floor not properly sanded flat during initial cuts; inconsistent operator walking speed; improper abrasive selection/sequence; inadequate first-cut angle; operating the big machine in the wrong direction; not enough overlap with each pass of the big machine; or dust build-up within the machine. Sanding typically removes no more than 1/16 inch of wood, so deep scratches, and even some deep penetrating stains, will only be reduced, not erased. 
Your starting side will be on the right and you should work towards the left. "If you pick up a starving dog and make him prosperous, he will not bite you. One good way to evaluate your hardwood floor is to look for a spot where the edge of the flooring is exposed, such as by removing an HVAC floor register. you gave is going to bounce and cause ripples in the floor from a floor sander. Do a roll cast to roll it out to the side, or a forward and then back cast to place it behind you. How to use a hardwood Drum sander. Shallow stains and scratches can often be erased almost completely by sanding the floor. You have done all the research and now have the knowledge. Lot of work but the finish was excellent. Plan to spend around $100 to rent an upright drum sander for a day (half-day rental is also available). Thoroughly sweep, then vacuum the floor to remove all dust and debris.
This site is protected by reCAPTCHA and the Google. Using a hardwood drum sander is very simple. HomeAdvisor. 2022 The Taunton Press, Inc. All rights reserved. Or have a helper control the wire while you're operating the hardwood refinishing flooring tool, careful not to trip over it.
I gave him a chance to fix the problem and he failed, should I tell him to take a hike? Flooring Tool Renting Tip:For heavy or aggressive sanding, use a drum floor sander. Anti Spam Policy- Copyright - Linking - Privacy -Terms- Website Disclaimer, Copyright 2011-2019. Plus the sandpaper will less likely break on you. Most homeowners are unfamiliar with putting sandpaper on a drum sander, so it helps to watch someone else do it first. 
Let's pretend the cable is on the right side and the machine sands, heavy on the left side of the drum sander. Once you feel the drum, touch the flooring, slowly and gradually release the lever, and proceed forward, at a slow constant speed. How to Install Exterior Laminate PVC Siding, Podcast 481: Detailing a Slab, High-Performance Water Heaters, and DIY Dense-Pack, Podcast 480: PRO TALK With Painter-Remodelers Miquel and David McCarley, Industry-First Cordless Rebar Cutter and Bender, Plus, get an extra 20% off with code GIFT20, 10 Steps to Install Crown Molding on Cabinets, Choosing the Right Construction Tape for the Job, Pretty Good House Book Excerpt: Copper Farmhouse, 10 Dos and Don'ts for Electric In-Floor Heat, Framing Stairs to an Out-of-Level Landing, Good-Looking and Long-Lasting Traditional Gutters, The Fine Homebuilding Interview: William B. Sanding-related causes can include sanding a mixed species floor with various hardness ratings; sanding perpendicular to the installed direction; an incomplete or inconsistent sanding procedure accompanied by an inadequate abrasive grit selection; using drum pressure that is too heavy for the species being sanded; using thick, compressive or doubled-up driver pads on the buffer drive plate with the edger during the final sanding processes; allowing for inconsistent material removal based on material hardness characteristics (springwood, softer species); improper buffer sanding technique; or removing springwood at a quicker rate than the summerwood. Sanding a floor yourself is a tricky operation requiring specialty tools. Sounds like he does not know how to sand a floor.
It is very often done when old carpeting is removed to expose a hardwood floor that was previously covered. On multi-directional floors, sand at a 45 angle to the direction of the grain where possible in order to flatten the floor. If your baseboard trim work includes shoe molding at the junction of floor and baseboard, carefully remove this molding, using a small pry bar. If the cause of the chatter is related to the equipment, abrasives, or harmonic vibration, these issues must be corrected before attempting repairs. I usually start near where my cable is located and work away from it. "I have learned so much thanks to the searchable articles on the FHB website. You shouldsandin a forward motion, only. Why work with average, when you can work with an ideal hardwood flooring company? Floor sanders come in three distinct types: upright drum sanders, upright orbital sanders, and edge sanders. It is critical that the sanding passes overlap to ensure a smooth surface. A second possible cause would be if they used a drum sander and the drum is not adjusted perfectly. Remember, too, that you will need help with the sander when you get home. Use a belt sander, for sanding wood floors, you can get grits up to 120. Inspect the floor with a bright light to make sure you've sanded all the wood flooring boards evenly to each other and have removed the existing wood floor finishes and any unwanted marks. 
At the time of rental, purchase a range of sandpaper gritsmore than you think you need. If needed, use an extension cord to reach the nearest outlet. Close the cover. Move any wires and cables thatmay bein your way, continue with your hardwood floor refinishing, untilwhole entire roomis completed. BTW, that floor was just 3/4 t&g over 20" spaced 3x10's spannig about 11' , exposed on the underside. With some sanders, the drum is lifted from the floor by tilting it backward so it pivots up against the rear wheels. Abrasive-related causes of chatter include poor splice/seam on the abrasive belt; poor quality or improperly manufactured abrasive; or contaminated or damaged abrasive.