Slab edge insulation building america solution center. Slab edge insulation is one of the most abused details in the most. In this context, design is defined as the decisionmaking process of planning, sizing. This guide presents information on the design of slabs onground, primarily industrial floors.
Insulated concrete slab, concrete slab heating, concrete wall. The comprehensive technical library for logix insulated. Footnote 14 consistent with the 2009 iecc, slab edge insulation is only required for slab on grade floors with a floor surface less than 12 inches below grade. The construction and design of concrete slabs on grade d. Slab on grade fpsfs can be installed with one placement of. Findings from this study support the following conclusions. Slabongrade raft foundation insulation detail, prefab icf. The foundation for this passive house consists of a slab on grade with a thickened perimeter footing that is thermally isolated from the ground by eight inches of highdensity, structurallyrated eps insulation r38. Floating slabongrade construction slab insulation techniques slab insulation can be installed following one of two basic techniques. Sources for polystyrene foam insulation protective coatings. Slab on grade floors illustrated in irc 2003, figure r403.
Department of housing and urban developments huds partnership for advancing technology in housing path top ten technology for 2004, the fpsf design concept has gained acceptance due to its insulation benefits, energy efficiency, and. Tm 580912 concrete floor slabs on grade subjected to. It is often applied to the exterior and should extend from the edge of the wall insulation or top of the foundation down to at least 600 mm 24 into the soil. Superinsulated slab foundations it provides in a passive solar design.
Insulating a slabongrade foundation fine homebuilding. In new hampshire, chris roche is pulling together plans for a new energyefficient home. The kore passive slab is an insulated foundation system that works much like a raft foundation. This manual p rescribes the criteria for the design of concrete floor slabs on grade in buildings for heavy loads and is applicable to all elements responsible for military construction. Insulated slab on grade foundations are usually the most cost effective, but we also offer full foundations, crawl spaces, and foamfree pier foundations, each of which can be detailed for passive house performance and comfort. This flexibility factor makes 78 pex much less prone to kinking than other 78 pex tubings.
Two inches of insulation at the slab edge and under the slab shaved 8,000 btu hour off the heating load of this atlanta slab on grade. Tb means thermal break between floor slab and basement wall. Finite element analysis of uninsulated and insulated heated slabs. In a well insulated slab on grade, the frost front will extend below the edge beam of the slab. Frost heave must be considered in the design process for a modern swedish slab on grade. The major structural components of a slabongrade foundation are the floor slab itself and either grade beams or foundation walls with footings at the perimeter of the slab see figures 42 and 43. When insulation is installed in a cavity which is less than the label or design thickness of the insulation. Houses and other structures may be built on shallow, slab on grade foundations in coldclimates when properly insulated to protect against frost heave. Additionally, the homeowner wanted 10inchwide plank flooring throughout most of the house, so the subfloor had to be solid and sealed. Type of type of minimum nominal effective allowable minimum polystyrene insulation density rvalue rvalue. Slab on grade plastispan insulation around the foundation creates a continuous blanket of insulation over the exposed wall. Such slabs are referred to as membrane slabs, floating slabs, or filler slabs and range in thickness from as little as 4 to 8 depending on the supported loads. Stresses in floor slabs on grade resulting from vehicular loads a re a function. Revised builders guide to frost protected shallow foundations.
Below grade insulation options for a concrete slab on grade. Martin holladay explains insulating a slab on grade in the energy smart details department. Uses less form material than insulating after the pour and has many characteristics common with frost. Project engineer, project architect or system designer need to verify and. Frost protected shallow foundations are most suitable for slab on grade homes on sites with moderate to low sloping grades. R5 at the depth specified by the 2009 iecc and aligned with the thermal boundary of the walls 14, 15. Improve comfort and save energy in homes with slab on grade floors. Effect of slab edge insulation rem design simulations 8% increase in total heating consumption with no slab edge insulation 62% of heat loss through slab edge 16 insulation located below grade shall be extended the distance provided in table 402. Highperformance slab on grade foundation insulation retrofits. Tm 580912 concrete floor slabs on grade subjected to heavy. Insulated slab on grade with wall detail note extension of insulation board beyond edge of footer. How basic foundations are built, including slabs, perimeter foundations, concrete blocks, and piers. Super insulated slab foundations it provides in a passive solar design. This design guide presents an fpsf design procedure for slabongrade buildings and.
Introduction concrete slabs on grade are a very common type of concrete construction. Slab on grade floors with a floor surface less than 12 inches below grade should be insulated in accordance with information provided in the insulation and fenestration requirements by component table, which is. The kore passive slab eps300 product allows the foundations the be built on structural grade expanded polystyrene eps300. Both slab on grade and structural slabs can be created using this formwork. Slab on grade or grade slab types construction procedure. I have seen it done several ways on the internet and really need some advice.
Asce, secb course content slab on grades construction. I have several questions about the insulated slab on grade design. Design guide frostprotected shallow foundations hud user. Insulating a slab on grade depends on at least four factors. The major structural components of a slab on grade foundation are the floor slab itself and either grade beams or foundation walls with footings at the perimeter of the slab see figures 42 and 43. The rvalue to use depends on the results of your compliance analysis. Slab on grade floor insulation zones 3 4 5 unheated slab rvalues 0 10 10 heated slab rvalues 5 10 15 z success with slab insulation north carolina residential energy code 2012. Improve comfort and save energy in homes with slabon. Floating slab on grade construction slab insulation techniques slab insulation can be installed following one of two basic. This includes a slab on grade house or addition, the walkout portion of a heated basement, or a breezeway that shares a slab with the garage. A guide to slab edge insulation install that meets the.
Legalett can be used for buried slabs as well, either adapted to conventional construction techniques typically wtih 4 100 mm of concrete and 3 75 mm of eps or as a typical legalett structural slab that is buried. The design procedure set forth in that publication had at that time been in use by the author for about 15 years. Prepared by pci committee on precast sandwich wall panels. Slab perimeters must be insulated where the top edge of the slab is above grade, or less than one foot below grade see figure 6. Above grade walls above grade walls insulate walls including those next to unconditioned spaces dont forget to. Horizontal line with white markers is a reference plane at approximately 2. Two inches of insulation at the slab edge and under the slab shaved 8,000 btuhour off the heating load of this atlanta slab on grade. To understand the rationale behind insulated slab on grade design, it is important to understand the nature of heat flows affecting slab on grade construction.
Of course, this limits me to relatively flat sites. Design guide for frostprotected shallow foundations. Frostprotected shallow foundation design green building. Concrete slab design monolithic slab foundation design more. The slab on grade design calls for doublestud walls insulated with densepacked cellulose, what roche believes is the most economical and practical approach for getting the walls to r40, or beyond. It is the only crosslinked 78 pex tubing on the market and its bending diameter is less than 20, making it easy to thread through floor joists. Details for insulating a slab perimeter greenbuildingadvisor. From the below fig, it is clear that the wall stands on a footing and the grade slab is resting on a layer of gravel and moisture barrier. Improve comfort and save energy in homes with slabongrade.
Insulated slab using insulated concrete forms youtube. Slabongrade floor insulation zones 3 4 5 unheated slab r. Concrete slab concrete design sip house floor slab slab foundation insulation board architecture details curb appeal house plans. Insulating, along with sealing, all six sides of the net zero building envelope are fundamental steps in the construction of zero energy homes. The foundation system for this highperformance home was to be slab on grade, and we were aiming to achieve r15 to r20 of slab insulation in our zone 5 climate. Success with slab insulation north carolina residential energy code 2012. One of the concrete wythes may be a standard shape, such as a flat slab, hollowcore section, double tee, or any custom architectural concrete section. When is insulated concrete slab needed is q question raised by many builders and homeowners. Diy concrete slab luxury slab on grade slab foundation concrete finished floor.
It includes general information to consider when working with nudura in both plan and vertical section layout including. However, with frost protection insulatio n, the depth of the frost front below the slab will be reduced s ignificantly. Fpsf design for unheated buildings with insulation in single plane. Residential requirements of the 2006 international energy.
Supported grade slab or slab on grade foundation is chosen when the traditional footings are already framed on site to raise the columns. Background information on design theories is followed by discussion of the types of slabs, soilsupport systems, loadings, and jointing. A4 slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l. Heat loss at corners is most pronounced because it occurs. The irc illustrates this method of insulating a concrete. Putting a vapor barrier down, insulation and getting the rebar started. Stresses in floor slabs on grade resulting from vehicular loads are a function of.
The construction and design of concrete slabs on grade. First this is a timber frame home that will be built in searsport, maine. Ive built fpsfs on slopes with a 3foot change in elevation from one corner of the slab to another, but if the site is much steeper than that, the cost of elevating the low side with gravel fill becomes an issue. These slabs and the layers below must be capable of supporting the live and dead loads imposed by vehicles, stationary andor moving equipment, loaded storage racks and. Slabongrade insulation code compliance brief building. It is specific to slabon grade foundations on residential homes but may also be. Posttensioned slabs the edge of a posttensioned slab is not required to be insulated. The design of fpsf use insulation to prevent frost heaving in cold climates. I have a two storey building, and my second floor and roof loads are transmitted to column footings below my slab on grade. Specifically, a concrete slab on grade may be subjected to concentrated post or wheel loading. But, in fact, as foundations go, its quick and costeffective and provides an excellent base for the superinsulated homes we build. This section covers below grade construction details that apply to all building types, for either combustible or noncombustible construction classifications. Design of concrete slabs on grade for cold storage applications insulated concrete slabs are common in cold storage facilities.
Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Aci 360, design of slabs on grade, refers to this as a type b slab. Design guide frostprotected shallow foundations author. Slab on grade insulation should extend downward from the top of the slab on either the outside or. Only the manual watthour meter and slab energy flow readings. Contrary to what you might hear from others, passive house certified buildings can be built on any type of foundation. Frostprotected shallow foundation design fpsf provides cold weather durability without excavation below the frost line. Sep 16, 2016 compacting gravel for under a raft foundation insulated slab forming systems corner detail for insulated slab forming system skirt detail for frost protected shallow foundation slab forms rebar detailing for slab foundations. Also, minimum tubing is required to gain maximum heating results. Three heat flow zones slab center, slab edge and slab.
First designs to follow the brab report required foundations heavier even than the san antonio. Grdslab concrete slab on grade analysis spreadsheet. Slab on grade fpsfs can be installed with one placement of concrete, eliminating multiple inspections and speeding construction time. I believe it is in climate 6a and is fairly close to the ocean. But, in fact, as foundations go, its quick and costeffective and provides an excellent base for the super insulated homes we build. Many consumers and design professionals are unaware that postframe buildings may be erected upon a traditional foundation wall. Insulated slab on grade design greenbuildingadvisor. After this publication, it was subsequently adopted by the uniform building.
Our design temperature for manual j hvac calculations here is in the range of 23f to 26f, depending. Slab on grade floors with a floor surface less than 12 inches below grade should be insulated in accordance with information provided in the insulation and fenestration requirements by component table, which is reproduced following this paragraph. One step closer to pouring the foundation to our house dont forget to like this video and subscribe so you dont miss. Heavy loads in building s such as warehouses include moving load s, stationary live loads, and wall loads. Frostprotected insulated slab frostprotected shallow foundation international residential code irc section 402. Design concrete slab on grade concrete engineering. Simulation of a heated slab below grade with and without insulation. Residential requirements of the 2006 international energy conservation code.
Highperformance slabongrade foundation insulation retrofits. Now, i just need to design my slab on grade for a relatively small uniformly distributed load live load 4. A3 design examples using coe charts a4 slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l. Foundation insulation upgrade design modeled site energy savings. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. The most significant heat loss from the slab on grade occurs in the perimeter band of soil immediately adjacent to the building. This document presents an fpsf design procedure for slabongrade, stem wall foundations, and unventilated crawlspace. The kore passive slab effectively wraps the foundation of the building with eps insulation ensuring there is no thermal. Slab on grade is a misnomer, since these types of foundations invariably include turneddown edges similar to, but not as. Jan 06, 2014 slab on grade construction technical guide deciding to build your home with a slab on grade foundation instead of a conventional basement or raised crawlspace foundation can greatly reduce your environmental impact during construction, and has the potential to offer significant financial savings as well. It addresses the planning, design, and detailing of slabs. Insulated foundation using icfs low cost way to form a slab with zero thermal bridging. It is important to insulate the walls, floors and ceilings with types and thicknesses of insulating materials that fit the specific needs of each surface, and to design.
Foundation 6 foundation slab on grade slab perimeter edge insulation must be installed where the slab is part of the conditioned space of the house. The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. Slab on grade floors are often heated, which provides a very comfortable and even distribution of heat throughout a home. Analysis and design of slabs on grade with single layer of reinforcement ground supported slabs are frequently designed with a single layer of reinforcing. Crawl space insulation floor insulation basement insulation foundation repair house foundation building a new home house building home inspection windows.
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