There are a few things you should think about other than the function purpose of the joint. However, while selecting any waterproofing material for underground reservoirs or swimming pools, one 4.3.4 Application on Retaining Wall has to check the major functional properties required Concrete joints in retaining walls and at raft level such as hydrostatic pressure head to resist, presence should be provided with flexible adhesive . Concrete expands and contracts as it changes temperature. For these reasons, its recommended that you inspect the expansion joint from time to time. If objects such as manhole covers are incorporated in the slab. "name": "Rob Cox", "image": { A decoupling expansion joint should extend across the entire width of the top of the bond beam to allow the deck to move independent of the pool shell. Instead, we cut expansion joints into the sidewalk which breaks the concrete into smaller pieces. Midwest, Feedback via Email The Offices 2 Building, One Central So, the reason that pool caulkis necessary (besides looking nice) is that caulking keeps water and debris out of the joint and prevents some very common and very expensive problems for your pool wall. Steel reinforcement (within the concrete itself), Granular fill, and adjoining . So if your slab is 4 inches thick, the slab can be 8 to 12 feet long or wide without requiring an expansion joint. Submerseal is produced by coating an impregnated cellular foam with a non-corrosive liquid silicone sealant. For example, if the slab is 4 inches thick, the joints should be 1 to 2 inches deep. Our website is supported by our users. This can be pushed down, cut down, or burned down with a torch. The cut has to be perfect because its always visible. A common specification used by soils engineers is to attain a 110% to 120% of optimum moisture content to a depth of at least 18. Because I dont like to do maintenance I use a better caulk/sealant. Without it, stress and pressure will built up which results in cracks or buckling. "height": "219", Our expansion joint compounds are designed to offer a high elasticity whilst keeping a high compressive strength. Crumbling mortar joints between coping stones. Date:9/1/1989, Publication:Journal Proceedings Learn more about pool care and repair. The general approach to locating joints and sealing them includes de- We sometimes earn a commission when you click through affiliate links on our website. This will also keep dirt and sand from getting down inside the expansion joint and slipping down around the pool walls and flooring. Not all pools need caulking, just in-ground pools with concrete decks and coping stones as shown above; only about 3 million pools in America, that's all. Concrete & Expansion Device. If your using thicker concrete or have reinforcement like wire mesh, fiber or rebar, the placement of your relief joints changes a lot. Or water will seep into areas underthe coping, or behind the tile, freeze and expand, loosening mortar, tile and stone. To know exactly where to install the joints in that range, you must assess the conditions under and around the concrete. "headline": "How to Caulk Your Pool's Expansion Joint", The silicone coating is compliant to NSF/ANSI Standard 61; NSF Standard 51; FDA Regulation CFR 177.2600; MIL-A-46146. Wear old clothes and shoes, this can get messy. Control joints should be saw cut or tooled at 24 intervals but the closer the joints are, the less chance of shrinkage cracks developing. (Understanding Construction). Once the joint is cut, flexible material can be inserted into the groove. The depth of the joint should be a minimum of 1/4 inch and a maximum of 1/2 inch below the concrete pads. 2. A submerged expansion joint, Submerseal is a water resistant, joint-face-adhered, precompressed, primary seal for retrofit and new structural expansion joints and construction joints where continuous or intermittent immersion or contact with chlorinated water, saline water, potable water, and certain effluent concentrations is planned. The external silicone facing is factory applied to the foam at a width greater than the maximum offered extension and is cured before final compression. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. control joints, are a gap between two slabs of concrete which allows them to move without breaking. The same happens to your pool shell, it grows a little larger when summer heats up, and contracts or shrinks when the weather gets colder. Expansion/contraction of the pool coping structure. Pool Inspection Reduces Chance in Liability Claim, HOW TO AVOID SWIMMING POOL and SPA DAMAGE IN THE COLDER MONTHS. Could you clarify? Submerseal Product Details Description Silicone-coated, pre-compressed New or Retrofit Chlorine and saline resistant Resists head pressure Details 1/2 to 4 (12 - 100mm) 50% Movement (+25%/-25%) Chemseal Product Details We can fill almost any expansion joint with mastic grout on your property with our service and provide many custom colors to choose from. Use expansion joints between slabs and columns, walls, footings and wherever curbs or sidewalks meet other concrete structures. Sika's range of sealants and adhesives make your pool deck repairs worry free. This process removes any loose particles or residue ensuring a clean and sound surface perfect for the adhesion of the waterproofing membrane. The pool is fairly irregular in shape and thus we have inserted expansion joints in the proper locations with dumbell type waterstops. Damaged concrete, tiling and grouting areas in swimming pool. Ready made concrete joints are sold just about anywhere masonry supplies are and we recommend you use them. Removed from it's shrink-wrap packaging, Submerseal gradually self-expands but with enough time for insertion into the joint opening. Its not a forgiving material. When pouring concrete within an area bordered by walls or buildings. Acid Wash Resistant: Submerseal is resistant to up to 50% hydrochloric (muriatic) acid solution for short contact durations(less than one minute before full dilution and neutralization)during acid washing as typically recommended for restoration of badly stained or algae-covered pools. I would suggest calling the PCA and ACI technical information departments and asking them. For estimating how many tubes of caulk you'll likely need, use the following bullets: Joint Width: 0.25'' Tubes per 10 ft circumference: 0.1 Joint Width: 0.5'' Tubes/10': 0.3 Joint Width: 0.75'' Tubes/10': 0.6 Caulk helps keep debris from getting kicked into the joint. A concrete expansion joint, or control joint, is a gap between two concrete slabs. You can use sand to fill up the spaces in the joints before sealing it up with an epoxy sealant. The large lagoons were cast-in-place. Fountains, potable water, wastewater treatment, swimming pools, and water parks can expect more durable performance from Submerseal than from liquid sealants. Expansion joints provide separation be tween adjoining parts of a structure to allow movement where expansion is likely to exceed contraction. Date:5/1/2018, Publication:Materials Journal Then you know what width you need to form up, that is a few inches thick and as high as the steel wall, for the concrete pour. Some types are nicer than others. Expansion joints are provided in slabs, pavements, buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures. A width to depth ratio of 1:0.8 for floor joints must be maintained (for exceptions, see table below). As concrete expands and contracts it needs room to move. Sikasil Pool Saw-cut joints should be done within 4 to 12 hours after the concrete has been finished. Limit the search results from the specified source. Date:3/1/2016, Publication:Special Publication For pools that have been previously caulked, remove the old caulking with a long blade razor knife, moving around the pool slowly (and carefully!). It can also shift with the movement of the earth. Pool Caulking is easy, when you know how." Often it is necessary to transfer load across the joint. Waste water treatment plants (WWTP), etc. Control joints create a break between concrete slabs and other rigid parts of a structure. Without a proper expansion joint, the two concrete structures would expand as one structure, and the long and wide pool deck would win the battle against the tall and thin pool wall. Joins in Submerseal are made in compression and with application of liquid sealant at the silicone bellows connection. If you want a patio free of expansion joints, you can strengthen the concrete with reinforcement or by making it thicker. To learn about caulking expansion joints and other swimming pool maintenance issues, call Sunrise Pool Services, Inc., at 678.804.0050. If a joint was there, it could have absorbed pressure and prevented the crack. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. This is a simple process of re-caulking the expansion joint and the cost is usually calculated by how much material is used, plus labor. Its called self-leveling because it is slightly runny and will level itself as opposed to gun-grade caulk which has a putty consistency and must be placed in the joint with a small trowel or putty knife. Already a member? We are a registered 501(c)3 non-profit that is funded by user donations. So if your patio is 4 inches thick, it can be 8 to 12 feet long or wide without requiring an expansion joint. If your going to do this by yourself then I recommend you rent a machine that works on a guide rather than trying to eyeball the line. "name": "In The Swim", When a slab meets another concrete structure like a wall or set of steps. The purpose of having expansion joints in a concrete slab is to prevent cracks and buckling. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete. Wet the edge of the towels and gently smooth out edges so you have a flat surface along the expansion joint. . Hi Fred, push the backer rod so that your depth is 3/8 to 1/4 of caulk. Report S Summersgal Active member Mar 13, 2008 35 Concrete is extremely stiff and doesnt contain any elasticity. This pressure relieves itself by cracking. "height": "219", Have a bucket of water and several cloth towels. Routine visual inspection will reveal any damage to the product or adjacent substrates that might affect performance. Expansion joints are more common on big commercial projects and often aren't required when pouring residential slabs. If you install them after, a concrete saw is used to cut the joints. Thanks, you twowill check out the PCA/ACI idea. It may not display this or other websites correctly. A second reason the expansion joint is filled with flexible caulking is to prevent water from slipping down behind the swimming pool structure. Substrates must be solid, parallel, plumb and free of any contaminants. Fred, no worries if there is not a concrete sub-deck. Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so its critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Its recommended to have concrete joints along column lines. Do You Need a Structural Engineer for a Pool Claim? You can also use a razor knife to carefully trim a larger backer rod to size. Coping is pre-made separate from the pool and can be a safety type coping (pictured), stone, pavers, etc. The expansion joint needs to be the entire thickness of the deck. 111 Royal Group Crescent Woodbridge, ON L4H 1X9 Canada, Toll-Free: 1-800-526-8365 | Phone: 508-836-0280 | Fax: 508-836-0281 | techinfo@emseal.com, 201 Polito AvenueLyndhurst New Jersey 07071United States of Americaphone +1 (201) 933-8800fax +1 (201) 804 1076. Properly sized and installed, Submerseal makes a lasting swimming pool joint seal. The steel crossing stress relief joints allows less movement in them. It allows the concrete to move when it expands and contracts due to temperature changes. I used to say that caulking the expansion joint was something that only snowbelt pool owners had to worry about, but with freezing temps occurring more regularly in the south these days it should be on the mind of concrete pool owners everywhere. Pool mastic generally refers to the expansion seal located several inches from your in ground pool's edge. "width": "611", Often the line of delineation between . Caulking the expansion joint keeps out debris. You have to maintain a good sealed expansion joint so the water rolls over the top of the deck and not under it. Expansion joints dont need much maintenance but its a good idea to check them every now and then. "description": "How to Caulk Your Pools Expansion Joint correctly, like a professional. Generally speaking, if the concrete is 4 inches thick at 3500 4000 psi, we multiply that by 2 to 3 in feet. If you do have expansion joints and notice damage to them over . Select a new point . Even though these joints are different they all serve the same basic purpose. Different joints in concrete slabs all have the same bottom-line purpose of preventing cracks. Look for material that is permeable, and can bond to the concrete. Over the years, if enough dirt and sand get inside the expansion joint, it will impede the movement of the pool. Frontier Deck Joint's design features "T" members that provide a water stop. Date: 9/1/2015. Using silica sand as a filler is beneficial because it saves you from using too much epoxy sealants. Really? Caulk helps prevent water from penetrating into the joint and freezing. Horizontal expansion joints in cantilevered coping is typically left open. So for a 4 inch thick concrete slab, expansion joints should be installed every 8 to 12 feet apart. Horizontal concrete expansion joints are sealed with self leveling, expansion joint sealants. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide", With over 300,000 members, TFP is the largest and most influential pool & spa website on the Internet. Concrete expansion joints can be installed before or after the concrete is poured. This joint should be caulked every five years or so. If possible, place control joint right next to walls or other structures where you wont see them. }. The next thing you need to know about tiles in a swimming pool relates, again, to expansion joints. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide", Perform this step only if the expansion joint has an open end. Preventing cracks tile, freeze and expand, loosening mortar, tile and stone second... Sidewalk which breaks the concrete is extremely stiff and doesnt contain any elasticity next. 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