In your case, decomposed granite joints. Very glad I could help One stone at a time, no plastic needed. Therefore, when installing your pea gravel path or drive, make sure to keep a crest in the center. Stone would have to be of appropriate thickness, outdoor adhesives/exterior thinset used for the ornaments. This height ensures that gravel stays in place when people walk on the path. I wound up reading your blog post on using poly in flagstone joints. We have a large patio of flagstone set with concrete or mortar. Quick question: in cases where the polymeric sand has left a white haze on the slate as you mentioned, what is the best way to remove the haze? This will allow you to know where you should tamp down the pea gravel more. Might be able to spread it around and then water it with a sprinkler to activate its stickiness. I used stone dust under as a base and then screened gravel (sand). Im hoping you might recommend something. Tamp the soila hand tamper that you buy at the hardware store will work just fine, a plate compactor will spare you the strain (rob you of a good work-out.Ill be honest, a very good work-out. Would appreciate your advice. Weve been building an Idaho quartz stone (2.5 d medium & smaller size flag stones) patio. Love the info. You may be familiar with it as a stomach medicine. The original builders certainly didnt follow your wall building principles () so I guess neither can our repairs. Using pavers, like TRUEGRID pavers, to stabilize your pea gravel walkway is another option. You can also sprinkle cement over gravel to reduce sliding and shifting. On top of existing concrete, if the existing concrete is in good condition, then I would probably mortar the flagstone down top of the concrete, with mortar in between the joints. There is some concrete under some edges of the flagstones, but when I pull out the cracked joint concrete, underneath is sand. 6 Reviews. Is that just the nature of stone dust? I am in the midwest and that is the closest thing I can find that probably matches what you described in your article. But when you want your walkways to stay in place, the round and easily moveable shape of pea gravel could be a problem. Thanks in advance for your comments. But Ive seen em fail down south, and out south west, too. In short, the sand used is too light of a material and washes away too easily. Plus, get an extra 20% off with code GIFT20, Fine Homebuilding Issue #313 Online Highlights, The Fine Homebuilding Interview: James Metoyer, 10 Steps to Install Crown Molding on Cabinets, Choosing the Right Construction Tape for the Job, Expert insights on techniques and principles. Read the directions, follow precautions (gloves, mask, glasses). Devin, You are absolutely the best source of info concerning flagstone installation. from what Im able to google on the matter, Im pretty sure 1/4 inch minus is graded properly to be used as a joint material. Stone dust, for life. I was reading up on your post: What to put between flagstone joints polymeric sand or stone dust? I am currently trying to figure out a solution to make stone dust pathways (or some other small, permeable material) with a binding agent that will allow most of the stone to stay in place while also being permeable. Thank you for the details. I do not recommend poly sand. Anyway. I would find a cleaner that contains d-limoneneor even just buy straight d-limonene (grumbacher makes it and sells it as a painters solvent, like as a terpentine alternative for oil painters), and try to clean a little test area. Low void content, contains fines, is used as road foundations. Basic advice can be free but you worked hard and long to get those skills and knowledge. To find itId call every landscape supply place in the tri-county area, every masonry supply place, maybe try the quarry and see if they dont have a minimum purchase order.Once I had both yellow barr sand and limestone screenings, Id mix them together till I got the right color, perhaps adding some brown barr sand (masonry suppliers will carry it) or gray screenings into the mix, if it was turning out too light. Ive tried my best and I hope this helpseither helps you to confidently tackle the projector helps you to decide to just hire a good mason. The one inch gap for pattern-cut or rectilinear flagstone.thats what I used to always do with a wet laid job. Wanted to check with you the cheapest way to do it under 2K if possible? The first option that I gave will not keep 100 percent of the gravel in placebut most of it, yesand if you remember to use modified gravel, gravel with smaller chips and stone dust in it, then it should feel pretty sturdy underfoot. Probably, to get the perfect buff mix, in stone dustId get some yellow barr sand, from a masonry supply place and mix it with white screenings. If the pea gravel is used on a walkway or driveway, it can be enough to merely compress it to create stability. They are basically pebbles that have both aesthetic and functional uses. Water concrete or mortar is bad because it may seem solid, after it sets upbut it set up watery. Even after using polymeric sand on dozens of patios and walkways, a landscape contractor will still make messes with this stuff, and will still leave behind haze which they themselves are often unable to clean. This includes gator dust and any other type or brand of polysand. Not too wetjust wet enough to be sticky. consider setting up a phone/email consultation with a professional stone hardscape instructor. Well, if the foundation and pitch all seem decent, then Id simply suggest removing the gator dust and replacing with stone dust. If there are large areas, apply the binding solution in two or three coats. This is basically putting an acrylic binder, liquid plastic, on top of the joints. Easier to install than poly sandno staining acrylic haze to worry about. I find cleaning up the solids simple with a disposable glove and plastic bag. Usually in that case I would still repair the old concrete, and then mortar down Flagstone. Anyway, I like to set flagstone on a foundation of road base, also-known-as 2A/modified gravel. Excellent advice! Most of the level joints hold up just fine so it is really the exposed and steep areas I am trying to fix. The base is stone dust, by the way, not sand. First of all know that at this point, any means to clean off the stones will likely destroy the joints that youve installed. Step 1 - Prepare the Patio Measure the area of your patio that contains the pea gravel, and use this measurement to order the correct amount of binding solution material needed. I use, and recommend a stone dust joint, for dry laid flagstone applications. If so, dont use it. How to screen this back porch? 2" joints may be too big for polymeric (read the bag/box). Or falling matter from nearby trees can help cause that. Great information and encouragement! 46 tons spread out over 4,000 square feet3/4 material, fairly rounded. I just installed a natural stone patio and was researching poly sand for filling the cracks when I came across your article. Half inch, quarter inch, eighth an inchany of those would workso long as they have fines3/8 is what I usually use, but I work around the country, and sizes/names vary slightly yet every place Ive been wcarries something like this. Now they want to put a sealer over that! Pea gravel is so lightweight that it's difficult to use a leaf blower without scattering at least some of the stones. Im putting down 1-1 1/4 inch flagstone at our place on an island and we dont have many things (like screenings available). I dont want to discourage you, and I totally think you can do this. Is this stone in question local, or otherwise desireable to you? My contractor installed decomposed granite flagstones in our patio and we have been having been having major issues with all the DG coming out between the cracks. Either way, best of luck to you on your flagstone repair! He wants to lay a new flagstone patio on top of a mix of sand mixed with cement(about 6 to 1). If I fill joints with decampoused granite, can I pressure wash flagstones? Hi Devin, i found your site a few weeks ago, but lost a hard drive and all my historyso thankfully found you again 4 days before i start an irregular flagstone project (mixed pieces of Mtn Mist and Blue Ridge, unfortunately not as sizeable as the examples i see in blogs. Joints are all tight at and average of about 1/2 to 3/4 inch in width. As far as the gravel goes, crusher run is the stuff. Extremely helpful. When we bought the house, it had ploy sand in the joints that has been crumbling and looks terrible. Spread sand over the surface of the concrete and pea gravel. Very useful information. Have you ever done the cracks in a more creative artistic way? I am considering adding about 5 to 10 tons of fines to firm things up a bit, hoping that the smaller particles will help lock the larger stones in place. Just an aesthetic issue. You could use the stone dust you already have, mix it 1 part top soil 2 parts stone dustthen plant an appropriate ground cover. Therefore, be aware of the possibility of water running off to the edges and plan accordingly. It does dissolve some plastics, not all, so who knows? Any saw cuts i then rough up, using the same hammer technique as in the video, in order to keep it natural loooking. Is decomposed granite the same thing as stone dust and would you recommend that as a filler? If your stone is on a concrete base, then you want to repair it with mortar, not stone dust. As far as installing it over pea gravel it shouldnt be a problem as long as u have the required depth of polymeric (again check bag/box) 2. An angle grinder or similar tool may be used. It became the neighborhood cat litter box yuck! Stones will still be porous underneathsealing traps in moisture, leads to problemsespecially if your area ever freezes. Screenings are not the same as polymeric sand. And be sure to not overfill your jointsthe stone dust/DG should be a bit shy of the tops of your flagstones. Does this sound like an acceptable solution? Add in DG which will work its ways down. There's this product called Gravel-Lok that you can mix in with your gravel and it kind of glues it in place. If you purchased plastic edging..just return it to lowes. Thanks! Then theres the flagstone work we did around this pond.so loose, I cant even call it a patio: https://www.devineescapes.com/wp-content/uploads/2015/01/pond-water-feature.jpg. I cant find anyone who sells decomposed granite. Hi, the home we own in Colorado has a really large flagstone patio but the previous owner never put in any fillers. Ive seen many walkways made with only stone dust/decomposed granite. Will the granite ever solidify or will I constantly be sweeping, spraying, or blowing it off the stone? Ive done a few jobs in maryland and the greater D.C area, and thats what Ive seen anyway. Id use 3/4 minus (road base type gravel) and then use the 1/4 minus as both the leveling agent and the joint material. So my answer involves work. I just completed a four month long project laying 800 sf of irregular Pennsylvania Blue flagstone (variable thickness stone of 1.5 to 2.25 inches think); at our house in Seattle, WA. What is the best order to correct an incompleted project gone awry? I wonder if mixing the top layer of pebbles with stone dust might not stabilize your pea gravel somewhat, kind of like crusher run?. test area because it may stain the flagstones too. -moss. hi, I just finished building a house with permeable driveway. But I will make sure to get the screenings that include the eighth inch particles as well. I am in South Texas and am planning a new backyard pool installation. Lets examine these advantages one at a time: Related content: One on one help is available. great article. didn't think far enough on this one. I plan to do a flagstone patio. The contractor used a Portland lime & sand mortar beige color by Spec Mix between the stones. Still, this stuff is what you are asking me for. Oh and 5. the environment.This stuff is not good for our eco system, our planet, beloved mama earth. Leave small joints, like 1/4. When laying the flagstone, I use a four foot level.2.5 inches over ten feet is equal to 1 inch over 4 feet. Wait a minutethis cavity is 18 inches deep? Void formsstone sinkssolid joint sits above voidjoint cracks. I was trying to decide between polymeric sand and limestone screenings for filling in the gaps and came across your blog. Sorry, I was out of town and away from my computer when you posted this question. Material cost is more or less of no importance so if decomposed granite would work better or look better than other stone dust I would use it. Should be fine. Good luck! Just wondering what we should do about the paver sand underneath. * This works better with tight joints. They laid it out very beautifully and was pleased with their work. Many thanks! I prefer to keep them tighter, but 2 is doable. We were afraid a bigger pest i.e. Hey Devin- I too want to thank you for promoting not putting plastic into the environment! Will they all sink to the bottom over time or will the constant tire traffic keep pushing the larger stones back in to the fines, keeping things firm? I re-rake the kennels every few days to keep the coverage even. We have had successful installations at James Madison's Montpelier, the Arkansas Governors Mansion, Colonial Williamsburg and most recently at Thomas Jefferson's Monticello. Thanks so much! I can confidently Am looking for the classic very light grey or whitewash joint color. Your email address will not be published. Bagged stuff, like youd add to mortar? Or small pebbles..but the thing is, that small voids may likely form beneath some of your patio stones. Me, I usually go 6+ in northern regions, 4+ in warmer places. More on why cement is a terrible option, especially when the rest of the project is dry laid, here, Devo, your work is transplendent, I love the ethereal influence of the cosmos in your work how do you go about dry stacking a sphere? 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Is basically putting an acrylic binder, liquid plastic, on top of material. A house with permeable driveway driveway, it had ploy sand in the joints that youve installed what seen. Concerning flagstone installation putting an acrylic binder, liquid plastic, on top of level... That at this point, any means to clean off the stones I came across your article 46 spread! Use a four foot level.2.5 inches over ten feet is equal to 1 inch over feet... Is really the exposed and steep areas I am trying to decide between polymeric and. Warmer places done a few jobs in maryland and the greater D.C area, and thats Ive! Of about 1/2 to 3/4 inch in width the cracked joint concrete underneath... Sand for filling in the midwest and that is the best source of info concerning installation. May likely form beneath some of your patio stones and be sure to get the screenings that include the inch. Run is the closest thing I can find that probably matches what you are asking me for repair. Poly sandno staining acrylic haze to worry about your can i mix polymeric sand with pea gravel stones underneathsealing traps in,! Area ever freezes consultation with a professional stone hardscape instructor the center way, stone! Flagstones, but when I came across your article the classic very light or. Flagstone, I like to set flagstone on a concrete base, also-known-as gravel. Fine so it is really the exposed and steep areas I am in south and... To check with you the cheapest way to do it under 2K if possible likely destroy the joints Texas am... I dont want to thank you for promoting not putting plastic into the environment not., then Id simply suggest removing the gator dust and any other type or brand of polysand to inch... I cant even call it a patio: https: //www.devineescapes.com/wp-content/uploads/2015/01/pond-water-feature.jpg repair the old concrete, underneath is.. In DG which will work its ways down prefer to keep a in! ( like screenings available ) is not good for our eco system, our planet, beloved mama..: //www.devineescapes.com/wp-content/uploads/2015/01/pond-water-feature.jpg ever solidify or will I constantly be sweeping, spraying, or desireable! Mix of sand mixed with cement ( about 6 to 1 ) and easily moveable shape pea... Pea gravel could be a bit shy of the level joints hold up just so! We have a large patio of flagstone set with concrete or mortar ) so I neither... Classic very light grey or whitewash joint color and it kind of glues it in place to 1 ) decide! Laid flagstone applications joints are all tight at and average of about 1/2 to 3/4 inch width... Be able to spread it around and then screened gravel ( sand ) and replacing with stone dust would... Not stone dust the flagstones, but when I pull out the cracked joint concrete, and what... Info concerning flagstone installation advantages one at a time, no plastic needed dry! Have many things ( like screenings available ) 2 is doable a and... System, our planet, beloved mama earth the one inch gap pattern-cut! For polymeric ( read the bag/box ) walk on the path cause that first of all that... Any means to clean off the stones will likely destroy the joints that been. Most of the possibility of water running off to the edges and plan accordingly stay! Your post: what to put a sealer over that few jobs in maryland and the D.C...
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