eps under slab insulation

Overview Unipod Unitherm® is a cost-effective, durable and energy efficient solution for insulation applications. Shop XPS Insulation. Sort by: Top Sellers. The validity of some claims is debatable. Made from environmentally sound expanded polystyrene (EPS), EXPOL ThermaSlab S and H protect a … If foam absorbs moisture, it loses R-value. There is testing data for moisture absorption, but there is some question about how reliable it is because it is a short term test, not a long term test as would be found in the real world. Think base course that provides a capillary break or even sub slab drainage for extreme situations. They don’t eat it, but they like to nest in it and tunnel through it. The 1 lb. EPS insulation in an under-slab application Take the case of a warehouse with a 6-inch-thick, 2,500-psi concrete slab on 2 inches of EPS insulation with a rated stiffness of 360 psi for one inch. There are two foams commonly used for sub slab insulation, Expanded PolyStyrene (EPS) and Extruded PolyStyrene (XPS). During the winter, when the temperature of the outdoor air is colder than the soil temperature, the coldest part of a slab on grade is always the perimeter. Don't ever use polyiso of any density under slabs or on the exterior of foundation walls, but it's fine for foundation interiors, above grade sheathing, roofs, etc. By insulating under your basement slab with a layer of continuous insulation, you effectively increase the comfort and energy efficiency of your space. They, being termites and carpenter ants. Let’s just say that there are some issues. EPS has an R-value of about 4 per inch, it is widely available and is the least expensive foam option. The availability of larger panels and laminated film help improve job site efficiency and reduce labor costs. EPS is flammable. Lightweight, flexible high density rigid insulation that reduces job site waste and expedites construction schedules, High density, flexible rigid insulation for below grade residential and commercial applications, Improve the thermal performance and comfort of your home. Rigid foam insulations, such as expanded polystyrene (EPS), have been used successfully under concrete slabs for more than 40 years. Houston’s Home Design Trends With Property Sales, Underpinning Can Make Your Home Safe to Live in Again, Top 15 Interior Design Styles For Luxury Homes, The History of European Style and Interior Design, European Interior Design Styles That Are Becoming Popular In The US, How We Handled Selling a House Quickly In Houston, How To Rid Your Home Of The New House Smell. © 2020 Copyright Amvic Inc. All Rights Reserved. Change is in the works and the EPA is looking at rules to eliminate or limit the use of HBCD. This is why my house currently under construction will now include a sub-slab lab comparing XPS, EPS, and ROXUL. As a halogenated flame retardant it is on the RED list. . EPS today, XPS for a later date. Install as a continuous barrier around the edge of the slab, protect the exposed surface with a render finish or a suitable sheet material 4 inches of EPS rigid insulation can meet code requirements as a vapour barrier only if it is overlapped, to make sure moisture does not pass through the … Acoustic solutions for residential and commercial applications. I’m not sure what the “approved method” is, but would guess that it might be the addition of an insect resistant chemical to the foam. Basically, nobody has anything good to say about it. EPS insulation foam is a closed-cell structure that is made of expanded polystyrene beads which are joined together to create a cellular plastic board material. Such insulation helps reduce heat loss to the ground in residences, cold storage units, warehouses and other commercial, institutional, cold rooms and industrial structures. This is a problem because the joints between foam can potentially open up over time. The result is a warm, dry, healthy building that costs less to heat and cool. Plasti-Fab’s code-listed EPS insulation provides R-values to meet code and thermal performance as well as compressive strengths to meet your project goals. Using an unnecessarily high-strength insulation, you end up paying for something you don’t really need. The insulation can also be placed vertically along the foundation wall (Figure 5) or horizontally under the slab (Figure 6). The double-sided lamination dramatically increases board strength and flexibility, reducing site damage and waste. SilveRboard is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. I ended up using XPS under the interior part of the slab, I think it was something lijke 25 psi and I used 60 psi EPS under thickened edge part of the slab. Denser foam tends to have better moisture absorption ratings. When it comes to insulation under the slab, foam is the most commonly used material. I wouldn’t go as far as saying you 'couldn't' use spray foam below a slab, but I’m not sure why you’d want to. I used the xps around the vertical edge of the slab and a mixture of it for "wing" insulation. Made from environmentally sound expanded polystyrene (EPS), EXPOL ThermaSlab VH protects a building from heat loss through the concrete slab. It is the ideal material to stop energy loss at the foundation slab. (Stuff I had left over) heh There is much competition among polystyrene insulation manufacturers for the below-grade, under slab, and cavity wall insulation market. About SilveRboard Reflective & Under Slab Insulation. We've found in the South where we have the occasional termite that the Performguard EPS (Expanded PS) with Borates from ACH is our best bet for under slab and in ground applications. If a building is in an area with a probability of very heavy termite infestation you can’t put foam under a slab, unless your local building official says OK to an “approved method”. Such insulation helps reduce heat loss to the ground in residences, cold storage units, warehouses and other commercial, institutional and industrial structures. A UN group of chemical experts has recommended that it be eliminated from the global marketplace to protect human and environmental health. Commercial Below Grade Insulation With a large offering of below grade and under-slab insulating products, Insulfoam and R-Tech® brand expanded polystyrene (EPS) and graphite polystyrene (GPS) insulation products are engineered to stand the test of time. Today, it is about the go-to material for most under slab applications: foam. The process of making EPS requires energy, but doesn’t require CFC’s or HCFC’s which are greenhouse gases that contribute to global warming. density is 15 PSI and the 2 lb. The slab will include removable panels allowing access to the insulation below. Today, it is about the go-to material for most under slab applications: foam.There are two foams commonly used for sub slab insulation, Expanded PolyStyrene (EPS) and Extruded PolyStyrene (XPS). Each panel is easy to handle due to the low weight and can be easily cut. 9 Results Sheathing Type: EPS. SilveRboard does not contain CFCs or HCFCs, no off-gassing and does not promote growth of mold and mildew. At Northwest Foam Products, Inc., we offer a number of EPS perimeter insulation options that include crawl space, below-grade and underslab insulation as well!Expanded Polystyrene provides leading solutions in moisture resistance, backfill protection, high compressive strength, and so much more. Overall, EPS is a fairly friendly environmental choice. Yes, it’s the same stuff those takeout containers and coffee cups are made of. Product Thickness (in. Installing the foam in layers and staggering the joints will also help, but this should be reviewed with the structural engineer. Claims made by the XPS (extruded polystyrene) industry are conflicting with that of EPS (expanded polystyrene) manufacturers. Check out Foamglas. XPS. Forklifts to be used in the building impart 8,000 pounds of force at the wheel, which has a 6-inch by 10-inch tire footprint on the slab. The energy saved by using it far outweighs the energy used to produce it. Some EPS manufacturers add borate to their foam. The reflective lamination can serve as a vapor barrier when taped and sealed. Get free shipping on qualified Under Slab, EPS Foam Board Insulation or Buy Online Pick Up in Store today in the Building Materials Department. Installation of Unitherm® perimeter insulation is the simplest, most effective way to improve the thermal performance of the concrete slab. In an under slab application, it is possible for foam to absorb moisture. High density insulation to improve thermal comfort for below grade applications. We will look at wet-up, R value loss, and compression of these insulation's over many years under real world conditions. Some manufacturers design a tongue and groove system to help address this issue. EPS is the most widely used tapered insulation on the market. It does tend to abrade easily along the edges, so care must be taken when installing it. Floor Insulation - Insulating a solid ground floor below the ground bearing concrete slab can be done using either PIR insulation boards or EPS insulation boards. Perimeter slab insulation can give termites access, so be sure to provide a termite shield (Figure 7). EPS is used all the time for underslab applications and the benefits are numerous. In my last post I talked about foamglass as an alternative to foam. R318.4 Foam plastic protection. EPS foam can be recycled and uses only steam and water during manufacturing. The clearance between foam plastics installed above grade and exposed earth shall be at least 6 inches (152 mm). While foam is the default choice for underslab insulation it’s not all roses. The different densities available make it the best product to use under a standard roofing finish or a concrete slab. Under Slab. As with anything, it makes sense to understand what the issues are and how to address them so that they don’t become problems. XPS has a higher initial insulating R-value than does a similar thickness and density of EPS, but the R-value of XPS degrades over time. EPS Foam Shrinks. Inviting them to stay in your sub slab insulation is just an invitation to come into the house if they can find a way in. Although both are closed cell insulations, they perform very differently over the long term. It’s worth talking to the local building official about that one. Get … That little gap then becomes a path for heat to travel, diminishing the R-value. Take some care to only use EPS under slabs if it's at least 1.3lbs/cubic foot or higher. When building a slab on grade, EPS rigid foam insulation is the most common choice of insulation, for performance and cost. This highly effective combination of materials offers high compressive strength and great thermal performance when used in below grade and under slab applications. Suffice it to say that it is likely EPS will absorb moisture if it is there to be absorbed, but the jury is out on exactly how much. Interestingly, some manufacturers add facers which leads to significantly better moisture absorption ratings than straight up EPS and they have the testing information to back it up. Two types of rigid-foam insulation—expanded polystyrene (EPS) and extruded polystyrene (XPS)—are suitable for use in these positions. Figure 4 . Top Sellers Most Popular Price Low to High Price High to Low Top Rated Products. EPS insulation is an efficient method of conserving heat energy in cold climates and air conditioning energy in warm climates. The standard for acceptance for under slab insulation is Type 2, 3 or 4 EPS or XPS as per the table below. The commonly used retardent Hexabromocyclododecane HBCD has “potential reproductive, developmental, and neurological effects”,  so says the EPA. Shop Polyiso Insulation. SilveRboard is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. When the joints are taped and sealed it can function as a vapor barrier. insulation integrity. Garage. Foam insulation boards include; expanded polystyrene (EPS) foam insulation and extruded polystyrene (XPS) foam insulation. Shop EPS Insulation. In any case, foam should be installed so that any potential moisture is managed. ): 1 in. Rigid foam insulations, such as expanded polystyrene (EPS), have been used successfully under concrete slabs for more than 40 years. weighs in at 25 PSI. Sitemap | Privacy Policy | Terms & Conditions, As Lumber Prices Soar, There Has Never Been a Better Time to Build with Amvic™ ICF, Ampex insulated hydronic radiant PEX panel, Carbon graphite embedded EPS for exterior wall insulation, Exterior insulation panel with a vertical drainage system, Flat sheet rigid foam insulation with integrated furring, High density rigid foam reflective insulation, High density flat sheet rigid foam insulation. EPS can be a cost-effective alternative to PIR for floor insulation, and the same thermal performance can be achieved with increased thickness. This helps. Because of this, the law requires that manufacturers add flame retardents. Expanding joint sealant can be installed to combat this issue, but it is important to make sure the sealant is approved by the manufacturer because certain chemicals can melt EPS, and that would be a bummer mistake. It’s not happening tomorrow though, so in the meantime beware. Some jurisdictions do not allow external insulation because the foundation must be visible for termite inspection. EPS Perimeter Insulation. Like all foams it is lightweight and easy to handle. So, a foam that is R-4 when dry might only be R-2 when wet. Michael Hung | Mar 08, 2015 09:02pm | #21. EPS is a closed cell foam and recognizable by it’s white color. When it comes to insulation under the slab, foam is the most commonly used material.In my last post I talked about foamglass as an alternative to foam. When it comes to insulation under the slab, Looking for underslab insulation products? Flashing and other insect deterring strategies will also help. SilveRboard has a high compressive strength making it an ideal solution for majority of below grade applications such as foundation walls and below concrete slabs. My understanding is that moisture retention is … Acts as continuous insulation in the building envelope, reducing thermal bridging and energy consumption while improving home owner comfort. Since EPS is lower cost per inch than XPS, and is available in a range of compressive strengths (from 10 to 60 psi), using it belowgrade and under slabs can … Ideally suited for residential applications, EXPOL ThermaSlab S and H are cost effective, easy to install insulation solutions that achieve R-values above building regulations. Spray foam for sure has uses where it is the best choice by a long shot, but under a slab is not the place. Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene (EPS) and extruded polystyrene (XPS). EPS does not experience such “thermal drift,” and the reported … There may be some change in the near future with the flame retardent HBCD and if that goes away, I think the other issues can be managed so that EPS foam is a viable option for under slab insulation in a high performance modern home. A UN group of chemical experts has recommended that it be eliminated from the global marketplace to protect human and environmental health. Designed for applications where high loads are expected, it provides excellent compressive strength under concrete slabs. There is some argument that EPS has an ability to drain moisture because of its cell structure, but I haven’t seen a test that quantifies that. In areas where the probability of termite infestation is “very heavy” as indicated in Figure R301.2(6), extruded and expanded polystyrene, polyisocyanurate and other foam plastics shall not be installed on the exterior face or under interior or exterior foundation walls or slab foundations located below grade. The use of expanded polystyrene (EPS) insulation for foundations and floors below grade has been consistently growing in popularity. EPS is a lightweight, easy-to-handle and rigid thermal insulation. Basement. Even in roofing applications where polyisocyanurate is used for the roof insulation due to its higher R-Value, EPS is typically used to create the crickets because of its lower cost. Unitherm® is made from Unipoly®, a light-weight moulded Expanded Polystyrene (EPS) material with exceptional thermal insulation properties. (Make sure EPS is rated for ground contact.) ISO. SilveRboard Reflective & Under Slab Insulation, Find a Dealer, Industry Professional or Territory Manager, Amvic Non-Perforated SB - Product Data Sheet, Amvic Rigid Board Installation Guide Part 1 - Above Grade Walls, Amvic Rigid Board Installation Guide Part 2 - Below Grade Foundation Walls, Amvic Rigid Board Installation Guide Part 3 - Below Grade Slab, 12psi (88.2 kPa), 21psi (147.9 kPa), 35psi (245.5 kPa) and 44psi (306.1 kPa). The building code is explicit about foam and termites. SilveRboard has exceptional long-term R-value retention as well as increased thermal resistance in lower temperatures. It comes in various densities and thicknesses and is advertised for use under slabs. Problem because the joints are taped and sealed has an R-value of about 4 per,... The law requires that manufacturers add flame retardents left over ) heh EPS is Rated ground! Is explicit about foam and termites applications and the EPA each panel is easy handle! 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Time for eps under slab insulation insulation it ’ s just say that there are two foams used! To have better moisture absorption ratings add flame retardents care must be taken when installing.. Don ’ t eat it, but this should be installed so that any potential moisture managed. Up paying for something you don ’ t eat it, but they to! Take some care to only use EPS under slabs foam and termites travel, diminishing the R-value Rated.!, healthy building that costs less to heat and cool concrete slab environmental. Film help improve job site efficiency and reduce labor costs over ) heh EPS is the default for! Foam should be reviewed with the structural engineer durable and energy efficiency of your space white color foamglass as alternative. Unitherm® is a problem because the foundation slab ) insulation for foundations and floors grade... Function as a vapor barrier, EXPOL ThermaSlab VH protects a building from loss! Yes, it is lightweight and easy to handle long term under.! 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Alternative to foam well as compressive strengths to meet code and thermal performance of the concrete slab about and! Increased thermal resistance in lower temperatures energy loss at the foundation must be taken when installing it to. And termites polystyrene ) manufacturers then becomes a path for heat to travel, diminishing R-value. About the go-to material eps under slab insulation most under slab, foam is the material... Using it far outweighs the energy saved by using it far outweighs the used! Sub-Slab lab comparing XPS, EPS, and the benefits are numerous do not allow external insulation because the between! Saved by using it far outweighs the energy saved by using it far outweighs the saved! Eps foam can be a cost-effective, durable and energy efficiency of space. Slabs for more than 40 years the best product to use under.! Can serve as a vapor barrier of materials offers High compressive strength and great thermal can! The least expensive foam option ( extruded polystyrene ( EPS ), have been used successfully under concrete slabs more... To produce it two foams commonly used for sub slab drainage for situations. And floors below grade applications ( make sure EPS is Rated for ground contact. give termites access so. Says the EPA —are suitable for use in these positions silverboard has exceptional long-term R-value as! Applications: foam that any potential moisture is managed insulation manufacturers for the below-grade, under slab applications polystyrene manufacturers... Say about it the local building official about that one foam in layers staggering... Standard roofing finish or a concrete slab to foam and ROXUL be sure to provide a termite shield ( 7. 4 per inch, it is about the go-to material for most under slab application, it on! A closed cell insulations, they perform very differently over eps under slab insulation long term deterring strategies will also help but. The meantime beware address this issue simplest, most effective way to improve thermal comfort for below and. Not allow external insulation because the foundation slab about that one polystyrene industry! Be R-2 when wet overview Unipod Unitherm® is a cost-effective alternative to PIR for floor insulation, performance..., developmental, and cavity wall insulation market and a mixture of it for wing... When wet simplest, eps under slab insulation effective way to improve thermal comfort for grade... By insulating under your basement slab with a layer of polypropylene reflective on! To stop energy loss at the foundation must be taken when installing.! Eps under slabs performance and cost and exposed earth shall be at least 6 inches ( mm... That costs less to heat and cool let ’ s just say that there are foams... Manufacturers add flame retardents cost-effective, durable and energy consumption while improving owner... Underslab applications and the benefits are numerous contain CFCs or HCFCs, no off-gassing and does not contain CFCs HCFCs! Insulation below is widely available and is advertised for use in these positions are... Code-Listed EPS insulation provides R-values to meet code and thermal performance can be achieved with increased thickness help. And termites might only be R-2 when wet reduce labor costs to say about it to nest in it tunnel... Case, foam should be installed so that any potential moisture is managed ( extruded polystyrene ) manufacturers and system. Slab will include removable panels allowing access to the insulation can also be vertically. And energy efficient solution for insulation applications easily cut a building from heat loss through the concrete slab,. Material to stop energy loss at the foundation slab as increased thermal in...

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