ISO. EPS Perimeter Insulation. insulation integrity. (Make sure EPS is rated for ground contact.) 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. (Stuff I had left over) heh SilveRboard is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. They don’t eat it, but they like to nest in it and tunnel through it. 9 Results Sheathing Type: EPS. Rigid foam insulations, such as expanded polystyrene (EPS), have been used successfully under concrete slabs for more than 40 years. Basically, nobody has anything good to say about it. Each panel is easy to handle due to the low weight and can be easily cut. 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. When the joints are taped and sealed it can function as a vapor barrier. 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. Denser foam tends to have better moisture absorption ratings. The result is a warm, dry, healthy building that costs less to heat and cool. Take some care to only use EPS under slabs if it's at least 1.3lbs/cubic foot or higher. 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. density is 15 PSI and the 2 lb. 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. So, a foam that is R-4 when dry might only be R-2 when wet. 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. Some manufacturers design a tongue and groove system to help address this issue. They, being termites and carpenter ants. Install as a continuous barrier around the edge of the slab, protect the exposed surface with a render finish or a suitable sheet material R318.4 Foam plastic protection. Shop EPS Insulation. 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. This is why my house currently under construction will now include a sub-slab lab comparing XPS, EPS, and ROXUL. 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. 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). Like all foams it is lightweight and easy to handle. The commonly used retardent Hexabromocyclododecane HBCD has “potential reproductive, developmental, and neurological effects”,  so says the EPA. In any case, foam should be installed so that any potential moisture is managed. Made from environmentally sound expanded polystyrene (EPS), EXPOL ThermaSlab S and H protect a … 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. Get … 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. The energy saved by using it far outweighs the energy used to produce it. 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. EPS has an R-value of about 4 per inch, it is widely available and is the least expensive foam option. 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. Product Thickness (in. Acts as continuous insulation in the building envelope, reducing thermal bridging and energy consumption while improving home owner comfort. The building code is explicit about foam and termites. Unitherm® is made from Unipoly®, a light-weight moulded Expanded Polystyrene (EPS) material with exceptional thermal insulation properties. The 1 lb. It is the ideal material to stop energy loss at the foundation slab. While foam is the default choice for underslab insulation it’s not all roses. This is a problem because the joints between foam can potentially open up over time. When building a slab on grade, EPS rigid foam insulation is the most common choice of insulation, for performance and cost. The use of expanded polystyrene (EPS) insulation for foundations and floors below grade has been consistently growing in popularity. SilveRboard does not contain CFCs or HCFCs, no off-gassing and does not promote growth of mold and mildew. Top Sellers Most Popular Price Low to High Price High to Low Top Rated Products. Installation of Unitherm® perimeter insulation is the simplest, most effective way to improve the thermal performance of the concrete slab. EPS does not experience such “thermal drift,” and the reported … Under Slab. EPS insulation is an efficient method of conserving heat energy in cold climates and air conditioning energy in warm climates. The different densities available make it the best product to use under a standard roofing finish or a concrete slab. High density insulation to improve thermal comfort for below grade applications. XPS. 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. 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”. EPS is a lightweight, easy-to-handle and rigid thermal insulation. Flashing and other insect deterring strategies will also help. Such insulation helps reduce heat loss to the ground in residences, cold storage units, warehouses and other commercial, institutional, cold rooms and industrial structures. © 2020 Copyright Amvic Inc. All Rights Reserved. Michael Hung | Mar 08, 2015 09:02pm | #21. weighs in at 25 PSI. I used the xps around the vertical edge of the slab and a mixture of it for "wing" insulation. 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. 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. Figure 4 . If foam absorbs moisture, it loses R-value. Perimeter slab insulation can give termites access, so be sure to provide a termite shield (Figure 7). That little gap then becomes a path for heat to travel, diminishing the R-value. The standard for acceptance for under slab insulation is Type 2, 3 or 4 EPS or XPS as per the table below. When it comes to insulation under the slab, foam is the most commonly used material. Think base course that provides a capillary break or even sub slab drainage for extreme situations. Basement. 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. 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. Overview Unipod Unitherm® is a cost-effective, durable and energy efficient solution for insulation applications. Using an unnecessarily high-strength insulation, you end up paying for something you don’t really need. It’s worth talking to the local building official about that one. In an under slab application, it is possible for foam to absorb moisture. In my last post I talked about foamglass as an alternative to foam. My understanding is that moisture retention is … EPS can be a cost-effective alternative to PIR for floor insulation, and the same thermal performance can be achieved with increased thickness. The slab will include removable panels allowing access to the insulation below. Garage. This helps. The insulation can also be placed vertically along the foundation wall (Figure 5) or horizontally under the slab (Figure 6). Change is in the works and the EPA is looking at rules to eliminate or limit the use of HBCD. About SilveRboard Reflective & Under Slab Insulation. There are two foams commonly used for sub slab insulation, Expanded PolyStyrene (EPS) and Extruded PolyStyrene (XPS). SilveRboard is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. 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. Spray foam for sure has uses where it is the best choice by a long shot, but under a slab is not the place. Because of this, the law requires that manufacturers add flame retardents. Some EPS manufacturers add borate to their foam. The validity of some claims is debatable. Check out Foamglas. ): 1 in. 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. . Designed for applications where high loads are expected, it provides excellent compressive strength under concrete slabs. 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 … There is much competition among polystyrene insulation manufacturers for the below-grade, under slab, and cavity wall insulation market. Sort by: Top Sellers. This highly effective combination of materials offers high compressive strength and great thermal performance when used in below grade and under slab applications. EPS is a closed cell foam and recognizable by it’s white color. 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. 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. EPS Foam Shrinks. It does tend to abrade easily along the edges, so care must be taken when installing it. 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. Foam insulation boards include; expanded polystyrene (EPS) foam insulation and extruded polystyrene (XPS) foam insulation. It comes in various densities and thicknesses and is advertised for use under slabs. 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 … 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. 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. Claims made by the XPS (extruded polystyrene) industry are conflicting with that of EPS (expanded polystyrene) manufacturers. EPS today, XPS for a later date. EPS is flammable. We will look at wet-up, R value loss, and compression of these insulation's over many years under real world conditions. Overall, EPS is a fairly friendly environmental choice. EPS foam can be recycled and uses only steam and water during manufacturing. Let’s just say that there are some issues. Two types of rigid-foam insulation—expanded polystyrene (EPS) and extruded polystyrene (XPS)—are suitable for use in these positions. 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. Yes, it’s the same stuff those takeout containers and coffee cups are made of. 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. 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). Although both are closed cell insulations, they perform very differently over the long term. EPS is the most widely used tapered insulation on the market. A UN group of chemical experts has recommended that it be eliminated from the global marketplace to protect human and environmental health. 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. Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene (EPS) and extruded polystyrene (XPS). SilveRboard has exceptional long-term R-value retention as well as increased thermal resistance in lower temperatures. The availability of larger panels and laminated film help improve job site efficiency and reduce labor costs. Installing the foam in layers and staggering the joints will also help, but this should be reviewed with the structural engineer. Today, it is about the go-to material for most under slab applications: foam. EPS is used all the time for underslab applications and the benefits are numerous. The double-sided lamination dramatically increases board strength and flexibility, reducing site damage and waste. As a halogenated flame retardant it is on the RED list. 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. Shop Polyiso Insulation. 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. As with anything, it makes sense to understand what the issues are and how to address them so that they don’t become problems. 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. Some jurisdictions do not allow external insulation because the foundation must be visible for termite inspection. When it comes to insulation under the slab, Looking for underslab insulation products? 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. By insulating under your basement slab with a layer of continuous insulation, you effectively increase the comfort and energy efficiency of your space. Get free shipping on qualified Under Slab, EPS Foam Board Insulation or Buy Online Pick Up in Store today in the Building Materials Department. Rigid foam insulations, such as expanded polystyrene (EPS), have been used successfully under concrete slabs for more than 40 years. The reflective lamination can serve as a vapor barrier when taped and sealed. Acoustic solutions for residential and commercial applications. 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