Without getting into extensive technical details and mathematical formulas, the problem is engineers often use an overly conservative approach for insulation under concrete slabs. EPS manufacturers typically warrant 100% of the published R-value for 20 years or more, while common XPS warranties cover just 90% of the published R-value. Such boards are effective at channeling water away from the foundation face, and can drain up to five gallons per minute per foot. A case in point is a side-by-side analysis of the two rigid foam types installed on a commercial building foundation in St. Paul, Minn. Whether selecting EPS or XPS insulation, to ensure performance, confirm that the product was manufactured to meet the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. 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. Where the heating is likely to be turned on and off, such as in new-build domestic properties, and a faster thermal response is required, the ‘floating floor’ arrangement of insulation above the slab can be more appropriate. There will be a damp-proof membrane under the insulation and possibly a second membrane on top, depending on the type of screed. Moisture resitance and stable R-value protects and insulates your concrete slab for a superior energy saving solution. Install Unitherm® beneath the concrete slab to ensure optimal heating performance. Insulation under concrete floor slab is often desirable for commercial buildings such as warehouses and factories, which are being designed to withstand high loads from large vehicles or equipment and here Knauf ClimaFoam XPS Board has proven long-term performance. Or, as demonstrated here, you can cover the slab with rigid-foam insulation, add two layers of plywood, and then add the finish flooring. Installation of Unitherm® perimeter insulation is the simplest, most effective way to improve the thermal performance of the concrete slab. XPS and EPS rigid insulation is used under concrete slabs. There are two ways to handle insulating concrete floors. Yet, expanded polystyrene (EPS) performs as well or better than XPS, and at a substantially lower cost. This can result in greatly over-designing the insulation’s strength. Understanding rigid foam insulation for foundation and under-slab applications Contractors are increasingly called upon to install rigid foam insulation under concrete slabs and on building foundations. Minimising heat loss will subsequently reduce energy costs. As insulation becomes increasingly common on foundations and under slabs, understanding the performance and cost factors of the different materials is important for successful bids and profitability. This encapsulates the reflective foil sheet preventing it from being exposed to the ground or the concrete, ensuring the life and performance of … When extracted and tested after 15 years in service, the EPS had 4.8% moisture content by volume, compared to 18.9% for the XPS (a four-fold difference). Such insulation helps reduce heat loss to the ground in residences, cold storage units, warehouses and other commercial, institutional and industrial structures. You can select from our standard sizes or customise your size & shape specific to your project. After 30 days of drying time, the XPS still had elevated moisture of 15.7%, while the EPS had dried to 0.7%. EPS offers a number of advantages over the more commonly installed XPS, including having the highest R-value per dollar among rigid insulations, making it a cost effective choice for many jobs. Although concrete itself has certain insulation properties, it is not nearly enough to keep your feet warm during harsh winter months. Many builders bevel the top of the vertical insulation so that none of the rigid foam is visible after the concrete slab is placed. For installations where the insulation will be exposed to large amounts of water or frequent wetting, rigid foam insulation is available with water-resistant facers or pre-cut drainage grooves. Next day deliveries are available, please contact 1800 486 4763. In addition to higher moisture resistance, EPS also is not subject to thermal drift. Sort by: Top Sellers. Let's unpack the issue in the context of ANSI/ASHRAE/IES Standard 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings. EcoFoil Under Slab Insulation consists of a layer of metalized foil centered between a layer of bubble insulation laminated to each side with a permanent bond. For many jobs, though, products with less compressive strength are more than sufficient and can reduce insulation costs. A common design assumption leads to specification of rigid foam strengths that are many orders of magnitude higher than necessary, which can double the insulation material cost. There are a number of different factors at play but the one thing that we always need to keep in mind is heat flow. Exceeding the ASTM C578, ‘Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation’. Photograph 2: Perimeter Slab Edge Insulation and Perimeter Slab Insulation—Two inches of rigid insulation is about the maximum practical thickness possible. It will help in the winter obviously. With a large fleet of trucks and premium delivery service in Victoria, you ensure that schedules are met and concrete is poured on time. Exceeding the ASTM C578, ‘Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation’. Moisture resitance and stable R-value protects and insulates your concrete slab for a superior energy saving solution. Visit www.insulfoam.com for more information. We have a wide range of floor insulation boards, including solid ground floor insulation, suspended floor insulation and soffit insulation. A careful evaluation of these materials’ performance attributes against the project’s needs can dramatically shrink labor and material costs. First, the standard defines two classes of slab-on-grade: Heated slab-on-grade floor: a slab-on-grade floor with a heating source either within or below it. INSTA-PANELS ® are insulated R-11 foam panels made of rigid polyurethane foam, covered in steel or fiberglass on both sides. To insulate a concrete slab, you will need to apply an insulation barrier. Unitherm® is made from Unipoly®, a light-weight moulded polystyrene material with exceptional thermal insulation properties. Using an unnecessarily high-strength insulation, you end up paying for something you don’t really need. You can attach wood sleepers to the floor, fill the gaps with rigid-foam insulation, and then apply your finish flooring. Slabmate is an under slab insulation solution that is applied first and then the concrete is poured on top with reinforcement. Horizontal insulation placed less than 12 inches below the ground surface or that portion of horizontal insulation extending outward more than 24 inches from the foundation edge should be protected against damage by use of a concrete slab or asphalt paving on the ground surface directly above the insulation or by cementitious board, plywood rated for below-ground use, or other acceptable materials, approved … Concrete. Up to one-quarter of a building’s energy loss is due to lack of insulation in below-grade areas, including the foundation and under slabs. In this scenario, a rigid foam insulation is usual, and as you’d want the same U value in the roof, we need the same thickness of insulation (180mm). SilveRboard is a rigid insulation board made from Expanded Polystyrene (EPS) covered with a layer of polypropylene reflective lamination on both sides. While you can apply insulation over the concrete slab, that requires adding wood subflooring and other components that add to the cost and complexity of the project. Purlink Foamex PurlinK is a high density polystyrene purlin insulation for greater thermal efficiency of metal deck roofing. Unitherm® is made from Unipoly®, a light-weight moulded polystyrene material with exceptional thermal insulation properties. The testing lab also found that XPS holds water longer than EPS. Spray foam for sure has uses where it is the best choice by a long shot, but under a slab is not the place. Say you use an average (and relatively inexpensive) rating of 40 psi, then the insulation will support: 40 psi x 8” wide tire x … Upload Any Drawings, Pictures or Information, Quality Assured Company by AS/NZS ISO 9001, For a detailed pricing take-off, please s. end through your information, drawings and requirements for an obligation free estimate. 4/10/2012 3 Climate Zones E301.1 6 5 8 4 Slab R‐Value Table 402.1.1 Insulation and Fenestration Requirements by Component E402.1.1 ClimateZone Slab R‐valued 4 10, 2 ft 5 10,2 ft 6 10,4 ft 9 That decision may hinge on whether the slab is heated, but there’s no agreement … For example, with a forklift load on a typical 4-inch-thick slab, one calculation would indicate that 32 psi is applied to the insulation compared to only 2.5 psi under a more accurate calculation. Re: Is it worth it to insulate under a concrete slab? Can withstand loads from large vehicles and equipment, Retains R-value even with moisture exposure, Easily shaped on site or supplied prefabricated, No long-term R-value loss or thermal drift. Insulation below the slab suits continuous, low level heating, gradually warming the thermal mass of the concrete and sustaining it at a consistent temperature. The correct installation of polythene DPM, rigid insulation and separating layers are highly important not just for the overall integrity of the screed system but for the quality of the entire flooring. Below-Grade Under Slab system with FOAMULAR® rigid board insulation. Heat flows from hot to cold, and in the […] Suitable Product for Concrete Slab on Ground Floor. x 4 ft. x 8 ft. R-1.93 Insulating Sheathing (136) ... rigid foam insulation insulation foam boards foam insulation board Kooltherm K3 Floorboard. The savings could mean the difference between a profitable job and one you just have to chalk up to experience. This applies regardless of whether you have a garage or a basement space underneath your home. Slab edge insulation protects the sides of concrete slabs. For installation on concrete foundations and under floor slabs, the rigid foam insulation you choose can make a difference of tens of thousands of dollars on a project. Exterior Concrete Slab Insulation Options It is good practice to insulate concrete slabs in cold climates to protect the slab from frost penetration. Confirm with your engineer what strength is needed. Check out our full range of commercial insulation products here. As for vapour barrier it will get destroyed while the cement is poured from the stones puncturing. Underslab expanded polystyrene pricing is based on sheet quantity and thickness. 1 Likewise, the lack of insulation on below-grade foundations, crawlspaces, and under slabs accounts … Many designers mistakenly assume that loads placed on slabs transfer through to the underlying insulation and soil at a 45-degree angle instead of a more uniform distribution. Insulation with polymeric laminate facers keep water from entering the insulation and also provide an added barrier to water wicking or diffusing through foundations and slabs. A common question with rigid foam insulations is how well it resists water. Three important factors to consider when comparing these two insulations for any belowgrade or under-slab application are compressive strength, moisture retention, and insulating capability. It is easy to install and can be used in many applications; exterior sheathing, interior basement walls, exterior foundation, hydronic and under slab insulation. Product Length (ft.) 10 ft. 8 ft. R-Tech 1/2 in. Heated slabs-on-grade will feature hot wat… Moisture resistance is also important for belowgrade and under-slab insulation, since wet products provide much lower thermal resistance. Such insulation helps reduce heat loss to the ground in residences, cold storage units, warehouses and other commercial, institutional and industrial structures. Rigid foam insulations, such as expanded polystyrene (EPS), have been used successfully under concrete slabs for more than 40 years. Slabmate will not breakdown over time, is made from high quality materials and no CFCs or ozone depleting properties are used in the material. Of these two materials, green builders prefer EPS, because EPS is manufactured with a more environmentally benign blowing agent than XPS. Slabmate X is an addition to the slab on ground insulation solutions. INSTA-PANELS ® are designed to be used as affordable and durable slab insulation and have all the benefits of regular sprayed-on polyurethane foam but in a clean and portable solution.. Common uses for INSTA-PANELS ® are:. Our Businesses In … Install as a continuous barrier around the edge of the slab, protect the exposed surface with a render finish or a suitable sheet material. 3 Results Insulation Location: Under Slab. 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 save on insulation costs. We also have insulation boards suitable for more specialist flooring applications, for example heavy duty floor insulation and insulation for cellar and basement floors. This is especially the case in colder climates. Many designe… In order of achieving this, you will need proper insulation installed. Plywood. 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