These stone wool products can be installed under poured concrete slabs and above crushed stone, as well as between the slab edge and the foundation wall, to act as a thermal break. When my neighbors don't heat their homes, the interior temperature is around 65 degrees. Underslab Floor Insulation ROCKWOOL rigid stone wool boards used as a continuous layer of insulation under a concrete slab can provide the thermal efficiency and mechanical properties required as an alternative to rigid foam. Under Slab Installation- Under Concrete Slab.
While slab insulation is more durable than often assumed, best practice is to protect it using a stucco or flashing material. As a result, priority should be given to insulating exposed slab edges. (Make sure EPS is rated for ground contact.). EcoFoil Under Slab Insulation has a compression strength of 140 PSI. There may be a case to be made for EPS rigid insulation.
We’re happy to help find the program that’s right for you! I can confidently say that I expect to be a life-long subscriber." Concrete has the ability to hold or store heat, but it is also more conductive than other building materials such as wood. Below-Grade Under Slab with FOAMULAR® XPS insulation. I am torn over whether to use Insul-Tarp under the slab. Copyright @ 2008-2020 All Rights Reserved, Under Slab Installation - Concrete Radiant Floor, Under Slab Installation - Radiant Snow Melt Slab, Under Slab Installation - Radiant Floor Over Wood, Eliminates condensation and moisture on concrete, Moderates concrete slab temperature (works great with, Quick and easy to install (see below on how to insulate a concrete slab floor), Extremely strong compression rate at 140 PSI and high puncture rate at 85 PSI, Creates a thermal barrier between the ground and the concrete slab, Provides an excellent vapor and radon barrier when the seams are taped. This will protect the insulation from damage during construction and after! The usual solution is to bevel the top of the foam so that concrete will then cover the bevel. Common building practices trap moisture in wall assemblies preventing them from dryi…. The area between the stemwalls is usually filled with compacted gravel to support the slab. The degree to which slabs can be insulated varies widely and so do the energy savings associated with it. This image shows how this can be done properly. That would mean your mesh and mesh chairs don’t sit at an even level, nor does your rebar, and then the thickness of concrete may in turn vary as well, so you may need a little more, or it may be too thin in some areas. Ambient temperatures, aka outside air temperature variations, is where it gets tricky.
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As a matter of fact, having insulation on the exterior exposed edge of the slab actually helps fortify the moisture barrier which rarely gets fully wrapped around the footing. If the foil surface comes into direct contact with certain acidic soils it can corrode the reflective properties of the insulation. When building a home, conditions such as climate and soil quality will likely determine which type of slab you build on. EcoFoil Under Slab Insulation (1/4" to 5/16") thick, is manufactured with a single layer metalized reflective sheet laminated between two layers of strong polyethylene bubbles. How to Find Qualified Green Building Professionals, Delivery: radiant, forced-air and decentralized.
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. When foil comes into direct contact with the cement, especially while it is curing, the foil layer will corrode and destroy the reflective properties of the insulation. This encapsulates the reflective foil sheet preventing it from being exposed to the ground or the concrete, ensuring the life and performance of the product. Additional benefits are that EcoFoil Under Slab Insulation provides a vapor and radon barrier. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.
EcoFoil developed this patented product for just this reason - to serve as a superior concrete floor insulation and concrete vapor barrier, but also to serve as a radiant barrier insulation which reflects radiant heat (see "How A Radiant Barrier Works").
Simple changes in wall design will result in mould-free durable basements. EcoFoil reflective bubble concrete floor insulation products accomplish all of this, as well as providing a barrier for radon. The main floor has sandstone rock for grade. Given that the under-slab is the bottom part of the “box”, you should take care of insulating it otherwise there will be a deficiency in your slab or basement. Unless you live in a very cold climate, you probably have to consider termites. 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. An error occurred. of XPS or EPS insulation at this location. This field is for validation purposes and should be left unchanged. Get home building tips, offers, and expert advice in your inbox. If the slab has hydronic tubing, the minimum R-value of this insulation increases to R-15. Do you have a project that requires EcoFoil insulation for an under-concrete application? It is specifically manufactured to withstand the pressure and corrosive nature of concrete and to provide the most reflectivity of any under slab insulation on the market. Programs like EnergyStar require 100% slab edge insulation, including the detail areas.
Two types of rigid-foam insulation—expanded polystyrene (EPS) and extruded polystyrene (XPS)—are suitable for use in these positions.
This can add additional energy savings especially in cold climates. Generally stem wall slabs offer more advantages when it comes to insulating the slab edge.
In most climates, it’s important to install a 4-ft.-wide band of horizontal insulation at the perimeter of a slab on grade and to insulate the interior of stemwalls with a minimum of R-10 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. EcoFoil Under Slab Insulation is a patented breakthrough product in the concrete slab insulation industry.
Materials options include a cementitious coating (ideally, one with chopped fiberglass), cement backerboard, pressure-treated plywood, metal flashing, or a proprietary plastic or peel-and-stick covering (Protecto Bond). EcoFoil Under Slab Insulation (1/4" to 5/16") thick, is manufactured with a single layer metalized reflective sheet laminated between two layers of strong polyethylene bubbles.
To maximize durability and thermal performance of the slab insulation, it is strongly recommended to install the insulation board on the inside of the stem wall. Access the Free Guide to Slab Insulation Techniques.
We are also maintaining an air space by placing the foil in between the bubble layers. It is also important to maintain an airspace on one side of the insulation in order for it to be reflective. View Product Details . Performance Attributes. At a minimum, this type of foundation requires vertical perimeter insulation to separate the slab from the stemwall.
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. In order to understand why and how to maximize the benefits of insulated slabs, we need to understand how climate and temperature come into play. You should always defer to your foundation contractor on these details, but the benefits still far outweigh the difficulties. While it could be argued that insulation might be useful in climate zone 3, it really isn’t needed in warmer climates, where an uninsulated slab helps lower air-conditioning bills compared to an insulated slab. On this page you can see what we like and don’t like about spray foam and why –, 4th generation blowing agents for spray foam. In climate zones 4 and higher, it’s also a good idea to install some horizontal insulation under a slab on grade.
This bubble insulation product also gives more reflectivity when used in a heated slab than any other concrete insulation product on the market. If your slab is heated, it’s a good idea to increase the R-value of the vertical and the horizontal insulation to at least R-20. Dealing With Fireplaces and Energy Efficiency, Plus, get an extra 20% off with code GIFT20, Insulating Foundations for Thermal Performance and Durability, An Interview with Al Tozer: The Living Building Challenge, FHB House Remodel 2020: Pre-Remodel Walkthrough, Building a Concrete-Free “Slab”-on-Grade Foundation, Expert insights on techniques and principles. Insulating garage and porch intersections is often a challenge for monolithic slabs. This can add additional energy savings especially in cold climates. perimeter slab insulation Heat Loss through an Insulated Slab Windows 33% Roof/Ceiling 8% Slab 15% 6 Doors 5% Walls 39% Insulation and Fenestration Criteria Table 402.1.1 Insulation and Fenestration Requirements by Componenta CLIMATE ZONE FENESTRATION U-FACTORb SKYLIGHTb U-FACTOR GLAZED FENESTRATIONb,e SHGC CEILING R-VALUE WOOD FRAME WALL R-VALUE MASS WALL R … We recommend our 3" White Seam Tape for this application. EcoFoil Under Slab Insulation has a compression strength of 140 PSI. In cold climates, most slab-on-grade foundations include perimeter stemwalls (or frost walls) that extend 3 ft. or 4 ft. below grade. If you have any questions on how to best insulate your homes slab foundation, please give us a call!
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