How to Fill Voids Under Concrete Slabs with Secure Set Spray Foam
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- Опубликовано: 27 авг 2024
- Learn more and order Secure Set Spray Foam at www.secureset.net
This video shows how to use GRA Secure Set Spray Foam to fill voids underneath concrete slabs - whether those are driveways, sidewalks, patios, porches, pads for satellite dishes, AC units, transformer boxes, etc.
This video shows how to set up and provides step-by-step instructions and tips on how best to apply the GRA Secure Set Spray Foam for your project and demonstrates the strength and load-bearing capacity of the foam once cured.
To buy the Secure Set Spray Foam, please go to www.secureset.net to see our 2 different kits available (200 kit and 120 kit). Or you can call us direct at 405-672-8885 or email us at info@graservices.com with your shipping address and we will send you a quote, or go to secureset.net/... to place an order.
Looks like a great product. Might try it for my driveway. Just a suggestion, stress safety glasses, hat, and gloves, etc. Not trying to be a prude, but this stuff can cause severe injury to eyes, and I suppose skin.
I was sold halfway through this video
Hello Sherman, Thank you very much !!
I need to do something to a driveway - I'm very nearly sold on this. For what it's worth I wish you would have covered the plexiglass during that part of the demo and uncovered it after the product was installed to show how it looked. Being able to see through the plexiglass let you fill in every void and made the end result look amazing. The thing is, people can't see under slabs. The point was to give me a sense of how it looks under a slab, but I think I didn't get that. If I'm worried about anything, it's that my unpracticed technique might not be good enough to 1) locate every void 2) get product to 100% of voids I do find.
Hello, good comment. Take any extra time you can afford to dig out along the side or front of the driveway. The more access you have to the voids, the belter you are. There is a concern that some voids made not get filled. You can best address that issue by leaving the tip of the nozzle under the area of concern for any extra length of time. Remember, the foam will always seek out the path of least resistance. You really don't have a concern for over filling the underside of the driveway, because the weight of the driveway is greater than any flow resistance under the driveway. Work slowly and the foam will do the rest. Expansion is at least 2.5 times the volume you inject into a certain area. You may not find every void, but getting the foam under say 80% of the current voids will give you much needed support. This product will support 10,080 lbs. per sq. ft. (We have increased the load bearing capacity of the product since we videoed our "Driveway" presentation.) Have a great project. Thank you!
Planning on using this to fix my back patio. A section that never had rebar put into it has sunk.
So excited thank you for the tutorial
Hello Ashley, We have a multitude of videos on RUclips about raising sunken concrete. If you have any questions about best practices, please email us at info@graservices.com It will be very helpful if you can attach several pictures. Thank you
I have a concrete pad that is located next to the side of the garage. it is 10 feet long 4 feet wide and 3 inches high and sits on the ground. It provides access to the side door of the garage and it has the external A/C equipment sitting on it.
The problem is, some type of animal has removed a lot of the dirt and there is a void under the pad that I would like to have filled before the pad cracks or breaks.
At this time there doesn’t seem to be a problem, and it doesn’t have to be leveled or lifted. I just want the void under the pad to be filled to make sure it doesn’t become a problem.
There is a slight opening at two locations that I can insert a pole into the void, but I can't see into the void. How do I use the product to fill the void without raising the pad?
Thanks for all your videos and advice,
Wes Rahn
Hello, It is good you have access to the void from the side. Since you have a slight opening, you can insert a tube extension to where you want the foam to go. If the end of the tube is over the top of the void, the foam will drop into the void and then start expanding. If you access the void from the side, the foam will fill the void as well. The expansion of the foam will not lift the concrete as long as there is a pathway out from under the concrete pad. The expanding foam will flow out of the slight opening you use to access the void. Expanding foam will always follow the path of least resistance, so since the weight of the concrete will be greater than the resistance from the dirt around your slight access area, you will be able to determine when the void is filled when the foam exits your access port. Watch this video, ruclips.net/video/uXK6lSytlKw/видео.html from minute 4:45 to minute 4:59 this should be what happens to the foam when you finish filling your void. Thank you.
Cured foam also trims well with a branch/pruning saw... have a sagging patio slab, need to look for voids and see how much I need to order:)
Hello rronmar, Yes, the pruning saw works very. I like to paint the exposed edge with gray primer paint, gives it a look close to concrete. Please let us know what you need and how we can help you. Pictures to info@graservices.com will help a lot if you can send us some. Thank you!
Would this product be appropriate for filling in ground hog tunnels under a slab? They are 4"-6" in diameter. There are some even larger areas where they nested.
Thank you for the question. Yes, this is a great product for filling voids, as long as you can mix/pour it right away into the voids. If this area is on a slope, then you can trough it into the voids. Some customers use a pvc pipe cut in half and use car wax on it so the mix with quickly slide into the voids space and not stick to the pvc. You would not want to overfill the voids and always have an escape route for the expanding foam so it doesn't lift or break your slab. It will expand 18:1 under normal temperatures for the foam. Also, 1 gallon of mixed Secure Set (1/2 gal. Part A & 1/2 gal. Part B) will generally make about 2.4 cu. ft. of foam. Another option would be our Secure Set Spray Foam. We have a 10 cu. ft. kit and a 16.6 cu. ft. kit available. You can call 405-672-8885 to order any of these products, or go to www.secureset.net to purchase all but the 16.6 cu. ft. kit (call us for that one, at this time.)
For other ideas on using the liquid mix/pour, please call us and we can help talk you through some other options.
Thank you, again. GRA Services - The Makers of Secure Set
Seems to me in real world situation, there won't be such easy access for the probe to get under the slab.
Thank you for viewing the project.
You would be surprised how many people actually call for pointers that say they have voids that are extremely similar to this one. The main difference being that it has soil at both ends of the slab, but mostly washed out through the center. Or they have voids under their house that a plumbing issues have created, and once it was repaired they need to fill the voids and this is a great visual for how they can use the spray foam with an extension. It also helps people to understand how the foams expands and moves during the application process.
Nice video, should have made the pad bigger than the truck tires width.
Next time! Thanks for watching.
In the write up on your site, it states: ●To comply with new state regulations, orders shipped to CA, CO, DE, MA, MD, ME, NJ, NY, RI, VA, VT and WA will receive the Low GWP (Global Warming Potential) propellant product version.
What is the difference in the finished product when using the LOW GWP propellant?? There must be a difference of some sort!...?
Hello Kenneth, Slowly but surely, the Fed Government is requiring all states to comply with the transition from HFC to HFO gas propellant in all pressurized containers. There is no effect on the physical condition or the technical numbers/characteristics of the set foam. The difference is in the amount of VOC's that are created when the product transitions from a liquid to a sold product. Compression strength, expansion and product density are the same for both products, the Low GWP (Global Warming Potential) gas propellant variant will be the standard in about 18 to 24 months across the USA. Thank you.
HFO Hydrofluoroolefins (HFOs) are unsaturated organic compounds composed of hydrogen, fluorine and carbon.
will it work in a void with water in it. I changed a sump pump basin today only to notice that there is a large void on one side of it. the slab is in a crawlspace. The void is at the corner of the home. next to the sump pit and extends to the footer. I'd say its about 2 x 4 feet and about a foot deep. the void has water in it due to a high water table. I can empty it but it'll fill halfway with water within a few minutes the rest of the void stays empty. will this product work to fill the void with some water in it? I'd like to avoid busting up concrete if possible. Thanks
Thank you for the question. No, it will not work when applied into an area with standing water, or where the ground is too wet. During the exothermic process of expansion it will suck the water into the foam and make a junk foam, which is not supportive. The drier the better for the best results. With your particular issue, you could vacuum out the standing water and before it has a chance to start refilling you could quickly spray a 1" layer of foam to attempt to plug off the area. It will start to harden within 2-1/2 to 3 minutes, so hopefully that will plug the area with a layer of non-supportive foam (because of the wet soil), but then you could layer on top of that area with a hard foam if you were able to stop the seepage of water. Once you get foam that has not been affected by the water it should be the hard foam. Contact us for other ideas, such as using our liquid mix/pour high density foam to help plug the area then use the spray foam to top off the other areas. Also, we have another kit available that makes more foam (16.6 cu. ft.), just a less dense foam. It will support 5,040 lbs. per sq. ft. vs. this 10 cu. ft. kit that supports 10,080 lbs. per sq. ft. You can reach us at 405-672-8885 M-F 8:30 a.m. to 4:30 p.m. CST or email info@graservices.com.
GRA Services
Would animals (skunks, opossums) be able to chew through or destroy the foam?
Hello Nancy, The foam has three times the density than most compacted soils. A borrowing animal choses to go where the resistance to tunneling is least. There is no nutritional value to the foam. The foam is not fool proof, but it is much tougher and resistant than native soil. Thank you
I have a concrete patio that is raised up off the ground with many footings and dirt. Edges are “closed in” with boulders. One side butts up to kitchen bump out. Ground hogs have burrowed under the entire patio and have removed a lot of dirt. There are at least 3 entrances. Hoping to use this product to fill the tunnels. 2 entrances are up against the house under the bumpout so will be very hard to see and very hard to get a pipe in there because the pipe would need to flex 90 degrees to get under the patio. The third entrance is on the opposite end so much easier to get at but assuming the tunnels aren’t straight the pipe won’t get all the way under the slab to fill all the tunnels. Help. I can’t afford to tear out the patio or replace it. Would appreciate any advice. Is there a way to attach a stiff but flexible hose? So I could force it into the more accessible tunnel and it would bend to follow the tunnels? I was hoping I could just put it at the entrance then block the entrance so the foam could force its way through all the tunnels but sounds like it can’t do that? And pls advise on how to stop the foam from hardening inside the applicator pipe? Thx so much! 14:13
Oh and patio is approximately 13x13
Thank you for your questions. We have not tried this type of application with using a flexible pex pipe or black rubber hose, but we have spoken with numerous customers that have done so. Sometimes customers tell us that they have issues when using extensions because they will dry up quickly if the foam is not constantly moving through the pipe, even more quickly than with just the mixer nozzles. This can easily happen with the mixture of dirt and foam at the extension pipe opening. Also heat and humidity can cause them to dry quickly. We would start with a small amount of cellophane tape over the opening and once you have the pipe in place then when you spray the foam it will blow off the tape. That will at least keep the dirt out of the pipe before you start applying the foam, then just keep spraying and moving the pipe toward you/the opening. If the foam dries in the extension pipe (or even in the nozzles) if will back up to the gun and can make a mess spraying out between the gun and nozzle, as well as can back into the gun the next time you try to spray and will ruin the gun/hose kit. If you want to call us at 405-672-8885 M-F 8:30 to 4:30 CST, we will try to give you some additional suggestions for this project.
You guys are on Sooner across from the Planet Fitness, right? Can I buy your products at that location?
Truly amazing! Time and money saver, by design do yo know the life expectancy of your product while in storage and once it has been applied? Great product by the way! That truck strength test was right on point, Thank's!
Hello, The product in the containers prior to it being used will last up to 18 months. Once you open the valves and use the product, the limiting factor is the time the product is in the hoses. The hoses will stay useable for about 30 to 45 days, after that the product will gum, up and they will be unusable. However, once you use the product and close the vales on top of the tanks, the unused product in the tank does not go bad. If you have this situation, where the tanks have been used but over time the hoses have gummed up, you can purchase a replace hose set to use the remaining product in the tanks. Thank you
How much stronger is this foam compared with Great Stuff?
Secure Set Spray Foam is a 4 lb. high density closed cell foam, with a 70 psi compressive strength, which means it will support 10,080 lbs. per sq. ft. It will not easily crush and will not absorb water after cured like that product. So really no comparison at all other than they are both an expanding foam.
Thank you for the question.
GRA Services
@@SecureSet-Fence-Installation Thanks!
How many years does it last? How does it do in humid climates like Miami?
It is expected to last 40 plus years since nothing effects the hardened foam. Even when left exposed above ground the UV rays just changes it to a darker color. It has no nutritional value; therefore, nothing is known to eat it.
It works great in places like Miami, we have many customers in FL since you have a lot of issues with wash outs of the sandy soil. We even have a lot of customers and contractors in FL that use the spray foam for supporting swimming pool steps that wash out or settle. See our Pool Step video, as well ruclips.net/video/-6TkEFoZpYE/видео.html
Thank you,
GRA Services
Very interested.
So if I don’t need to lift my driveway but actually just fill some voids that are forming, will it do that well?
Will it crack concrete if you fill a void and then it expands damaging the concrete worse?
Hello Aa, Filling an existing void, if you have access to it, it very doable. The only issue about the foam lifting the concrete is if the expanding foam is trapped under the concrete with no possible outlet. if you have access to the void from the side of the driveway, the injected foam will fill the void and expand to the point of least resistance. Thank you
@@SecureSet-Fence-Installation Thank you. it is also my question.
Impressive product demonstration
I would be interested in seeing other application such as its capability to hold something in place (fence posts?)
Also is there a climate rating with regards to how it responds in -40?
Hello Travis in Canada. First of, because of Covid, we cannot ship Haz Mat material to Canada. The Spray Foam Kits are considered Hazardous because the cannisters are pressurized. However, our Mix & Pour kits are belter suited for fence posts. Here is the link: www.secureset.net/product-category/products/
We can ship those to Canada. Please call us at 405-672-8885 if you need additional info. Thank you
Also check out our video showing the back fill of a 22 ft. long sidewalk that had washed out. ruclips.net/video/wd6RO4C1NQQ/видео.html
Someone said I can just use GreatStuff expansion foam. It’s only $3/can. Could you let me know why he is wrong?
Hello James, Great Stuff is a single component very low density, open cell foam. It is used primarily as a gap filler to seal window frames to stop air leakage into or out of the home. The compression strength of Great Stuff is less than 1.5 psi. It will not support any weight and because it is open cell and it will fill with water. Thank you.
Saw you said to fill any drilled holes with a dowel. Would filling with caulking also work?
Also, is this product used to support concrete you know has a void to prevent any further issue, or will it also raise concrete that has dropped?
Hello, Yes, caulking would work. A thick silicone or concrete patch will work. The spray foam kit was developed primarily to fill voids that are known to exist under concrete. With the long extension tubes you can reach quite a ways under a concrete slab if you have access to an opening. This past week we worked on a project that required a 22 foot extension to reach all the way back to some large voids under a sidewalk. The kit is not designed to be used as a means to lift concrete. Most often, if the slab has dropped several inches, we will dig out along the side of the slab, place a small hydraulic jack under the slab, (or several jacks if the sunken area is big), and then jack up the slab to a desired height and fill the void under the slab. Thank you.
Where can I get a spec sheet on this material? We are considering this product to fill under a slab and will have to submit material properties and data?
Hello, Please email your request to info@graservices.com We can then respond with data you need. Thank you
Would this work to stabilize shrink swell soil underneath a concrete slab?
Hello Cynthia, Your shrink swell soil I presume is clay? If the soil has expanded and then shrunk, and has consequently left a void under the concrete, this will work very well to help fix your problem. If that is not the case, please elaborate with further info so we can better help you. Thank you
@@SecureSet-Fence-Installation We recently had erected a 1500 sq foot detached metal garage on a concrete slab on my property in Virginia. The county inspected and said while the concrete slab was to code the footing depth on one side was not due to the soil coming back as shrink swell.The structure is brand new and there are no signs of instability at all. We were told we can either backfill the footing or have an engineer declare the structure safe for its intended purpose as simply a garage/workplace. If so, we can get the final approval. Just wondering would your product fulfill their requirements if used as back fill.
Hello Cynthia, The issue is the load bearing capacity of the soil. Most soils in the USA have a compression strength of 28 psi. That means it will support approximately 4,032 lbs. per square foot. We actually have two different densities of Spray Foam. One is has a 35 psi compression strength and the other is 70 psi. The first will support 5,040 lbs. per sq. ft., and the latter will support 8,080 lbs. per sq. ft. The other advantage is that both types are closed cell foams which means neither air not water can penetrate or pass through the foam. This means that once you place the foam under or by something, water will not erode or wash out the foam. This product is used extensively in the electric utility industry to support and stabilize large concrete pads that are used to support very large electric transformers. Thank you.
How much product would I need to fill in a space that is 40 feet by 5 feet, the gap currently on the steep side 2 inches?
Hello, Each Spray Foam kit delivers 10 cubic feet of high density foam. Based on the dimensions you have provided, you have 57,000 cubic inches of void to fill. That equates to 33.33 cubic feet . (57,000/1728=33.33) What I would do is purchase just 2 kits at first, some of the voids may not be 2" high, you never know. You can always purchase a third kit if you need to have more foam to complete the job. You will need to purchase some of the CPVC tubes at Home Depot or Lowe's to have the reach you need to get fully under the slab. Watch this video link to see how to attach the spray nozzles to the extension tubes. ruclips.net/video/1lO7M6Tlkwo/видео.html (Secure Set Technical Tips - Extended underground repair, Attachment of tip to CPVC Pipe) Thank You.
@@SecureSet-Fence-Installation Thanks so much for this, I found a cubic calculator online and came up with the exact same conclusions. My foundation just cracked two days ago, I am going to start dealing with the problem starting Monday.
Hello, Good deal, get to it early, you will be happy with the results. Use the tube extensions and you can get deep into the voids. If you can lay down and actually shine a bright flashlight into the voided area, you can be very accurate in placing the foam exactly where you need it. :)
@@SecureSet-Fence-Installation Thanks for getting back to me.
Can this work on lifting a slab to grade house
Hello, Yes, it can lift significant weight. Please email us the particulars of your project, we can help you determine the best course of action to take. Thank you
Our email address is info@graservices.com Thank you
@@SecureSet-Fence-Installation ok thanks
I'm very new to your product and I have a void under a walkway and front stairs that is only a few feet caused by a rodent or pest of some sort. As long as I'm careful not to overapply the foam, there shouldn't be any issues of the concrete raising up. Is this accurate and/or what are the risks here? 10 cubic feet is way too much, not sure where I would get the spray tanks if I were considering a smaller size of your product. I'm close to purchasing.
PS - My assumption is any excess foam would escape out of the entry point to the void. That is what I was looking to confirm. Any info is much appreciated.
Hello Michael, As long as there is an escape point for the foam, the expanding foam will always move to the point of least resistance. The concrete will not lift or give way to the foam UNLESS it is completely trapped and it has no where to expand except upward. Even then, the foam will compress itself first in order to equal the downward pressure of the concrete. Once that pressure is equalized and then exceeded, then the expanding foam will force the concrete upward. I hope this helps. Thank you.
@@SecureSet-Fence-Installation Makes perfect sense - thanks!
Approximately how many kits did you need to fill the void under the concrete in this video?
Hello Ron,
We used approximately 1.75 kits under this pad, since the space we had to fill was approximately 17.5 cu. ft. and a kit makes 10 cu. ft. of foam. Plus we used some of a kit under the plexiglass.
Thank you for your question.
GRA Services
405-672-8885
www.secureset.net
info@graservices.com
What diameter of the CPVC pipe do you use that will fit the spray nozzle?
Hello Polly.
This is a 1/2" OD and 3/8" ID CPVC pipe. At our local Home Depot they come in 5' and 10' lengths for less than $4. Tape in on really good with black electrical tape. If you are going to need even longer lengths, we have put 2 @ 10' together with a coupling and it still worked great, then moved down to a shorter length that we had ready to go for a quick switch out. It works great! Please let us know if you have any other questions.
GRA Services 405-672-8885 or info@graservices.com
What’s the r value per sq ft?
This kit was the 10 cu. ft. of 4 lb. density foam which has a 6.6 RV per 1 inch of foam.
Thank you for the question.
GRA Services
Considering using this to fill the void under my concrete front porch. Couple of questions. First, the CPVC you had attached...does the kit have an attachment for that to work? Also, as far as making the fill look better, could you scrape it off before it dried so that's even with the slab, or would that interfere with the expansion?
Hello, this product will work very well and support your front porch. The CPVC tubing fits over the tip of the nozzles. Here is video showing you the attachment procedure. ruclips.net/video/1lO7M6Tlkwo/видео.html Once the fill has hardened, if there is any foam outside the edge of your concrete, you can use any type of saw to cut off the excess. Once you have done that, you can spray paint the foam to match the concrete. I like flat gray primer paint, looks very close to concrete. Thank you
Termite and Rodent resistant?
Cubes of coverage per canister?
Hello, The canisters will produce 10 cubic feet of high density foam. There is no nutritional value in the foam, is not a good food source for termites or rodents. Thank you.
No nutritional value for either rodents or termites, have not heard of a single incident where the pests returned. Coverage is 10 cubic feet or 17,280 cubic inches
rodents don't just chew on stuff they can eat or for nesting. they have to chew or their teeth grow through the roof of mouth. i have witnessed them chew through foam in other uses. even tunnel through pest blocker foam.
@@MyNeowolf Seems to me you could put hardware cloth near the outside edges of the foam (cut it to shape before starting, so that you don't have to stop the foam very long to put it in place) to reduce that probability, and then cover it up with more foam so it isn't visible.
@@connieabbott8736 good solution
What the cost of the foam kit?
Hello Steven, please refer to this link. The kit will produce 10 cubic feet of high density load bearing foam. www.secureset.net
Do you supply to Europe?
Thank you for your interest in Secure Set Spray Foam. We do not ship outside the continental U.S. since these are pressurized canisters and the hazardous shipping regulations.
Where do you buy product in Texas?
Hello, We ship direct all over the USA. Southern Texas is two day delivery, mid to northern Texas is next day. Go to www.secureset.net to place order or you can call 405-672-8885 and place order direct,. Thank you.