The two spray foam insulation types (open and closed cell) are intended for use throughout your home. cost of spray foam insulation to be installed Spray foam insulation compared to Traditional methods are more costly also spray foam insulation is not the cheaper form of insulation, but it is much superior form of insulation available in the market today. There are some key factors that will influence the price of your spray foam insulation cost uk. Many property owners don’t know why spray foam insulation is that costly.Spray foam insulation is expensive because the materials, equipment, and keeping expert installers on staff are expensive. Get free estimates from trusted insulation companies near you. For example, the average cost of spray foam insulation will set you back around £55 for the materials per m2 and £175 for the labour. Know the costs involved before starting your next remodeling project! The cheapest part is the manpower to physically do the job. There are two types of spray foam insulation–open cell and closed cell. The foam can’t expand to fill all cracks and air holes if it never reaches a back corner or the farthest reaches of the attic. jQuery(setTimeout(function(){ad = document.getElementById("google-ads-209");if(ad.getBoundingClientRect().width){adWidth=ad.getBoundingClientRect().width;}else{adWidth=ad.offsetWidth;}google_ad_client = "ca-pub-8241630700082425";google_ad_slot = "4076001995";if(adWidth>=728){google_ad_size=["728","90"];}else if(adWidth>=468){google_ad_size=["468","60"];}else if(adWidth>=336){google_ad_size=["336","280"];}else if(adWidth>=300){google_ad_size=["300","250"];}else if(adWidth>=250){google_ad_size=["250","250"];}else if(adWidth>=200){google_ad_size=["200","200"];}else if(adWidth>=180){google_ad_size=["180","150"];}else{google_ad_size=["125","125"];}ad.innerHTML = ('');(adsbygoogle=window.adsbygoogle || []).push({});},"800")); jQuery(setTimeout(function(){ad = document.getElementById("google-ads-687");if(ad.getBoundingClientRect().width){adWidth=ad.getBoundingClientRect().width;}else{adWidth=ad.offsetWidth;}google_ad_client = "ca-pub-8241630700082425";google_ad_slot = "5512395736";if(adWidth>=336){google_ad_size=["728","90"];}else if(adWidth>=468){google_ad_size=["468","60"];}else if(adWidth>=336){google_ad_size=["336","280"];}else if(adWidth>=300){google_ad_size=["300","250"];}else if(adWidth>=250){google_ad_size=["250","250"];}else if(adWidth>=200){google_ad_size=["200","200"];}else if(adWidth>=180){google_ad_size=["200","200"];}else{google_ad_size=["200","200"];}ad.innerHTML = ('');(adsbygoogle=window.adsbygoogle || []).push({});},"800")); Spray foam insulation has many uses and often thought as, the ultimate insulator for your home. Both types have specific applications, and you’ll reap the most benefits by using them where they are designed to be used. How much does closed cell foam insulation cost? However, in the long-run, the costs vs value over traditional insulation outweighs the costs with yearly savings. How much does spray foam cost? Prices below are for a 3.5” foam thickness which is the maximum for open-cell and the minimum for closed-cell. On the same 2,200 square foot home, closed cell foam insulation costs $6,776 for the minimum 3.5” thickness, and $10,648 to spray the maximum 5.5” thickness. Keep in mind that the prices below are budgetary, and will vary job-to-job. jQuery(document).ready(function() { jQuery("#rt-tabbed-91").easyResponsiveTabs({ type: "default", width: "100%", fit: false}); var cont_width = jQuery("#rt-tabbed-91.resp-vtabs").outerWidth() - jQuery("#rt-tabbed-91.resp-vtabs .resp-tabs-list").outerWidth() - 3;jQuery("#rt-tabbed-91.resp-vtabs .resp-tabs-container").css({"width":cont_width});}); Average Cost of Spray Foam Insulation per square foot expanding foam insulation cost Whats the average cost of energy efficient insulation foam insulation cost per square foot How much does closed cell foam insulation cost? 1 board foot is equal to 144 cubic inches, or a board that measures 1 foot long and 1 foot wide and 1 inch thick. Actual Cost: $737. The Energy Saving Trust estimates it costs around £300 to insulate the loft of a semi-detached house (three bedrooms). While spray foam insulation costs more than standard fiberglass insulation, here's why it's worth the extra cost: Blown-in fiberglass insulation costs $0.40 per square foot to install and is constructed of tiny strands of glass. 2,000 divided by 15,000 = 13 cents per square foot/inch (raw material cost). Spray foam insulation is more expensive than other types of insulation. Fiberglass will last 10 to 25 years if it stays dry and it's R-value decreases over time. Where to use spray foam insulation? You’ll also need the proper safety equipment—protective clothing, safety goggles, gloves, and masks. The average cost to insulate a 1,500 square foot home with spray foam insulation is between $2,128 and $4,928 for professional installation. Insulation for existing homes is applied to the attic (underside of roof), and typically requires removal of the existing fiberglass beforehand. We track the estimates they get from local companies, then we share those prices with you. The R-value is not affected by moisture, as is the case with fiberglass insulation. The dry closed-cell spray foam turns into a hard plastic. I felt good Knowing exactly how much I should pay without getting ripped off. Two types of spray foam insulation exist, namely open cell and closed cell. Has been shown to add 250% racking strength to walls and roof. The … Closed-cell is used below the grade (ground) in, Because spray foam insulation expands to such a significant degree, it’s excellent to use. The average cost of spray foam insulation installation is $2,128 with most homeowners paying between $1,463 and $2,926. Spray foam insulation costs $1.36 to $2.63 per square foot depending on if it's open or closed-cell. Yes for closed cell. The average cost of applying spray foam insulation is $1,879, with most homeowners reporting costs between $1,024 and $2,948. Closed-cell spray foam has been shown to add 250% racking strength to walls and roof while the others add no structural integrity. As a simple rule of thumb, spray foam insulation will cost between €25 to €65/m², depending on thickness and type spray foam insulation. Open-cell spray foam costs $0.25 to $0.50 per board foot and closed-cell spray foam costs $0.90 to $1.50 per board foot. This is heat that is being replenished by your heating systems, eating up oil as it does so. RemodelingExpense had pretty darn accurate cost calculators that helped us budget our projects, all relevant to our zipcode and contractors near me. Spray Foam Insulation is usually measured in “Board Feet” which is one square foot, at one inch thickness. Furthermore, open-cell insulation requires a vapor retarder like sheetrock or plastic sheets stapled onto the interior walls. Also, spray polyurethane foam (SPF) insulates homes approximately 50 percent better than traditional insulation products. Open-cell spray foam costs $.40 to $.70 per board foot. Due to the materials and installation method, the average cost of most spray foams is higher than their counterparts. Tiger Foam is a closed-cell spray foam and will cover 600 board feet for $585. The average homeowner, insulating a 1,200-square-foot attic with 3 inches of open cell insulation, will spend around $2,700. That breaks down to anywhere from $0.35 to $2 per board foot installed. It’s expanding properties ensure that it covers every little crack and hole, but even with that ability, it still needs to be installed correctly. A cubic foot of closed-cell spray foam weighs 2 lbs. Existing Home Foam Insulation Cost. That wall, with a depth of 3 ½”, has an R-value of 13. The prices below are given using the following costs: Spray foam insulation costs $1.36 to $2.63 per square foot to install, and blown-in fiberglass insulation costs $0.40 per square foot to install. Fiberglass batt is the most common insulation. Open-cell spray foam insulation costs $0.25 to $0.50 per board foot. Many factors determine the cost of spray foam insulation, including the amount, depth, and type of insulation. In this case, the typical expense of spray foam insulation installation is $2,128. Open-cell spray foam insulation is used above the grade or above the ground. Comprised of glass fibers, it is an irritant to the lungs, skin, and eyes. Open-cell spray foam costs $0.25 to $0.50 per board foot and closed-cell spray foam costs $0.90 to $1.50 per board foot. Also, according to the ICC-ES (International Code Council Evaluation Service), if a particular spray foam has been tested and certified to give a certain R-value at a specific thickness, you cannot spray it any thicker than that. Cellulose is mostly made up of recycled newspaper treated with borate to make it fire and insect resistant and costs $0.32 per square foot to install. Kits come in both open and closed-cell foam. Spray insulation costs $22,500 to install. Closed-cell spray foam costs $.75 to $1 per board foot. Attic Spray Foam Insulation Cost. Simply enter your zip code and the square footage, next click update and you will see a breakdown on what it should cost to have Spray Foam Insulation installed in your home. However, installing spray foam insulation is much more costly than its predecessors and should be taken into consideration when remodeling your home or new construction budget. Traditional Insulation. Its R-Value is roughly 6.5 per inch. Keep in mind that foam spray gives off harmful fumes during installation. space, applying spray foam insulation costs $1,500-4,000, depending on the type of foam you use, accessibility and local labor rates. OPEN-CELL The primary difference between open-cell and closed-cell insulation is that open-cell insulation tends to be more flexible and more ‘spongy,’ whereas closed-cell is more rigid. Don’t let your remodeling budget go over-board by hidden surprises – understand what the average installed costs for Spray Foam Insulation is in your zip code by using our handy calculator. The primary reason closed-cell doesn’t need a vapor retarder, is because it already has one due to its density and mixture. A board foot is one square foot that is one-inch thick, or one square foot that’s covered by one inch of spray foam insulation. The usual method is to pop off a piece of siding, drill a hole, and fill it with spray foam insulation. Compare Spray Foam vs Fiberglass Insulation Costs Summary: Average Cost of Spray Foam vs Fiberglass Insulation One board foot (12" x 12" x 1") of open-cell foam insulation averages $0.45 to $0.80 cents.The same amount of closed cell insulation costs between $1 and $2.A square foot of fiberglass costs between $1.30 and $3.50 on average. You can also make your home more airtight by applying it around windows and doors. Best Price Spray Foam Insulation Kits. R-values vary between 3.5 to 4.8 per 1-inches. The size of the treated area in the attic to be sprayed is the most significant contributor to the spray foam project cost. On average it costs $1.50-4 per square foot to install spray foam insulation, including labor and materials. Get free estimates on HomeGuide from trusted foam insulation contractors who can help you install or consult you on the best insulation options for your home. Remodeling Expenses provides homeowners with accurate cost information on home services and level the playing field for consumers and service professionals. Which costs more; spray insulation or batt insulation? These open cells mean there is a lot of air inside, so it doesn’t weigh very much. [4][5]. For example if you are doing renovations in your first floor and will insulate the exterior walls of approximately 600 square feet. closed cell spray foam insulation cost installed foam board insulation prices Average cost of foam insulation in attic, How much does attic insulation cost? But when you compare ALL … It’s also used extensively in commercial development. It is an air barrier when installed correctly. Pricing depends on how many parts of the home you wish to insulate and to what thickness. How much will your spray foam insulation cost? If you decide to install foam insulation yourself, here are popular brands to research: Kits are suitable for insulating small areas of your home, such as the attic, any open wall cavities, the crawl space, and rim joists. A board foot is 12” wide and 12” long and 1” thick. Theres more to applying spray foam insulation, however, because you may need your installer to add m… – Francesca, Charlotte, NC. Yes, high-density closed-cell spray foam insulation is waterproof. The cost of spray foam insulation is usually expressed per board foot, which is a measure of volume (not linear feet). Be fully prepared to handle this insulation material with the safety equipment necessary to protect your eyes, lungs, and skin. For example, if you want to blow spray foam insulation into a wall of the home you’re building, figure the total square footage of the flat wall first. The savings in your energy bills will be noticeable, with most people seeing savings of up to 40%. closed cell spray foam (aka two-pound foam) is denser than open-cell at about 2 pounds per cubic foot. Spray foam insulation costs $0.44 to $1.50 per board foot. Get at least 3-5 estimates before hiring Spray Foam Insulation contractors — estimates are typically free, unless it’s a service call for a repair. Spray insulation, or "spray foam insulation" as it is sometimes called, has been used commercially for decades, but has only recently started to be used in residential applications. For the total square footage of wall space in a 1,600 square foot home, the following chart indicates the price for a range of house sizes for the different thickness of foam—2” and 3.5”—which will change based on the tested values for the brand of spray foam being used and the desired R-value for the geographic region. It is called open cell because the cells of the foam remain open, creating a soft, foamy looking texture when dry. The recommended maximum thickness varies depending on the manufacturer making the spray foam. Thus, spray foam is costly compared with other forms of insulation. Therefore, only a trained expert or roofing specialist should install spray foam insulation to your lofts, attics and roofs. It expands to 40–100 times its original size, sealing every crack and crevice. Generally, spray foam insulation costs between $0.44 and $1.50 per board foot. Before reading on, it is important to understand the cost-savings and other benefits that spray foam insulation provides. Spray foam insulation costs between $0.25 and $1.50 per board foot or $1.36 to $2.63 per square foot depending on the type. [1] https://www.mullinscompany.com/how-much-does-spray-foam-insulation-cost/, [2] https://www.icynene.com/en-us/blog/what-roi-spray-foam-insulation-cost, [3] https://www.retrofoamofmichigan.com/blog/spray-foam-insulation-cost-new-home, [4] https://sprayfoamkit.com/products/open-cell-spray-foam/, [5] https://tigerfoam.com/sprayfoaminsulation/order-products/spray-foam-kits/tiger-foam-fast-rise-formula-600-board-foot-kit/, [6] https://www.diffen.com/difference/Fiberglass_Insulation_vs_Spray_Foam_Insulation, [7] https://www.lowes.com/pd/GreenFiber-R-19-Blown-In-Insulation-Sound-Barrier/3227256. However, spray foam is much more costly than its predecessors and should be taken into consideration when remodeling your home or new construction budget. Foam insulation kits also come with different options such as fire retardant and anti-microbial properties. We were in the planning stages of our exterior remodeling project that included: New siding, windows, fencing, and a deck refacing. Generally, the R-value of open-cell spray foam insulation is 3.7 per inch. It comes in rolls that are cut to size and laid down like a blanket in the attic or hung in the walls. The national average cost to install spray foam insulation can range between $1.00 and $3.00 per square board foot (1 inch thick) of SPF insulation installed. Most homeowners spend $1,463 to $2,926 for professional spray foam installation with prices ranging from $627 to $8,000 depending on what needs insulating. If your wall is 20’ long and 10’ tall, your square footage is 30 square feet. To get the most value and stretch your dollars, choose these areas: Open-cell foam costs slightly less for the same thickness, but offers lower R-value. Since it’s an above-grade wall, you’ll use open-cell spray foam insulation. The most important ones are the thickness of the insulation, the size of the area that needs to be covered, the installation process and the type of spray foam insulation you choose. Remember, there are multiple styled homes in the U.S – from: Contemporary, colonial, cape-cod style, ranch, bungalow, Victorian, etc. Here is a look at the spray foam kits available and their cost from Home Depot, Lowe’s, and Tiger Foam. Expanding foam insulation costs from about $0.50 to $2.50 per square foot. The R-value of 2” open-cell spray foam is 7.4, and the R-value of 2” of closed-cell spray foam is 13. It’s not fireproof, but it will give you and your family some extra escape time if the unthinkable happens. The cost of spray foam is calculated by board footage. Blown-in insulation is a little cheaper than batting, fiberglass and radiant barrier insulation, which cost $1,600 on average. Spray foam insulation is not an unskilled DIY application because it is permanent. Spray foam insulation is the most expensive option with the highest ROI. Spray Foam Insulation Cost: Spray Foam vs. As standard, icynene spray foam insulation can begin at around £27 per square metre, but this cost can fly upwards, or maybe even decrease, depending on your home and insulation choices. Get 5 free estimates on HomeGuide from trusted insulation contractors: Let us know about your needs so we can bring you the right pros. Most spray foam is limited to a thickness of 5.5”, giving it an R-value of 20, but in the more northern areas of the country where the R-value is recommended to be at least 30, spray foam is not enough insulation. Spray foam insulation helps lower utility costs and protects against moisture, mold, and mildew. Using the example of the wall size above, 30 sq. Also, spray foam never loses any R-value while others decrease over time. If cellulose becomes wet, perhaps due to burst pipes, it must be cleaned up. ft at a 4” depth, and costs $885. Receive quotes from multiple pros that meet your exact needs. Above-grade open-cell spray foam is used mostly in residential construction, mainly in attics, exterior walls, and rooflines; and it works well as a soundproofing agent. Cellulose has a lifespan of 20 to 30 years, and fiberglass can last 10 to 25 years if it stays dry. Spray foam kits contain everything you need to spray foam insulation such as hoses, guns, and nozzles; but it’s a good idea to purchase extra nozzles, as they do tend to clog up quickly. Prices of application will cost an average of £525. Floor insulation checklist. The cost to insulate a home varies depending on the size of the area to be insulated. If inhaled, the bits of glass can cause sickness, and if they land on your skin, itchiness and rashes are the results. It is an excellent moisture barrier, sealing out 100% of moisture. Spray foam insulation costs range from $1.00 to $6.00 per square foot depending which part of the house you will insulate. Visit every supply house that sell your particular brand of Spray Foam Insulation and try to negotiate a better price with each supplier – I save on average 20%. ft x 3.5” = 105 board feet x 0.50 = $52.50. Try to get prices in late Fall, early winter – you should expect aggressive pricing discounts by waiting for a contractor’s down season. Here is an image to illustrate some of the benefits that spray foam insulation provides when installed properly: That price is also affected by the size of your home, the ease or difficulty in accessing all parts of the outside walls, the opening in the attic, the pitch of the roof, and the crawl space to the basement. Like any project or insulation type, the specific cost of spray insulation varies greatly according to the size of your home or room. For a general sense of what spray foam insulation costs, if you choose an open cell product the cost can be roughly about $0.44 to $0.65 per board foot. closed cell spray foam insulation cost installed, Whats the average cost of attic blown in insulation, Average cost of blown fiberglass insulation, closed cell insulation cost per square foot, Average cost of dense pack cellulose insulation, exterior insulation prices per square foot, fiberglass insulation cost on average installed, metal building insulation prices installed, Average cost of radiant barrier insulation, 24 Amazing Stamped Concrete Patio Design Ideas, Spray Foam Insulation – Installation Cost, Spray Foam Insulation – Total Average Cost per square foot. [3] That’s for top-to-bottom insulation from the basement to the attic, including all exterior walls. Spray foam insulation is more expensive than other types of insulation. Try to budget and additional 7-15% more on top of what our calculator gives out – I.e; difficult configurations, patterns, the additional complexity of your home will add to the costs. Closed Cell Spray Foam is usually between $1.00 to $1.50 per Board Foot and Open-Cell Spray Foam is usually between $0.40 to $0.60 per Board Foot. How do we calculate Spray Foam Insulation Cost? The average uninsulated or under-insulated loses up to 40% of all its heat in the winter. For an average 2,200 square foot home, open-cell foam insulation costs $1,254 for the minimum 1.5” thickness and $2,926 to spray the maximum 3.5” thickness on average, while a closed-cell foam installation costs $6,776. For a 1,000 sq.ft. To calculate how much spray foam insulation costs per square metre depends on 4 main factors: the thickness, the size of the area you want to insulate, how it’s installed and the type of spray foam insulation.. So keep that in mind and try to budget a little more, before starting your Spray Foam Insulation project. Closed-cell spray foam is used in residential construction, but usually below grade—in crawl spaces and basements. Hiring a professional is essential as they have the protective equipment and understanding of where to lay the product. A ½-lb open cell spray foam insulation: Open cell spray foam insulation yields range approximately 15,000 per square foot, sprayed at 1-inch thick. Spray foam insulation is substantially more energy efficient and does not lose R-value for its 80 years of life. Spray foam is two to three times more expensive than cellulose or fiberglass insulation, but it lasts 2 or 3 times longer (up to 80 years). If you’re looking for 2021 breakdown for Spray Foam Insulation materials and what installation cost might be, you’ve come to the right place. ceiling insulation cost on average wall insulation cost to install closed cell insulation cost per square foot Average cost of dense pack cellulose insulation exterior insulation prices per square foot fiberglass insulation cost on average installed garage insulation cost How much does green insulation cost? In-Store Credit Rebate: $253. Open-cell spray foam costs typically $0.25 to $0.50 per board foot and closed-cell spray foam ranges from $0.90 to $1.50 per board foot. The desired thickness can be determined by the cavity you’re blowing into or the R-value you want to achieve. Batt insulation costs $9,000 to install. According to the U.S. Department of Energy, around 40 percent of all energy is lost in the home because of poor insulation. It can also be used to patch any torn existing insulation. The average cost of spray foam insulation installation is $2,128 with most homeowners paying between $1,463 and $2,926. Insulating an existing home with spray foam is a more expensive proposition. This spray foam insulation vs. fiberglass cost comparison will help you determine which option is best suited to your financial situation and goals. Get free estimates from insulation contractors near you. In new construction, the insulation is applied before walls are closed up. On the whole, spray foam insulation costs two to three times as much as fiberglass insulation.Fiberglass insulation costs Closed-cell’s obvious advantages compensate for its slightly higher price tag of 15% to 30% for the same thickness. Closed-cell spray foam contains cells that close when it’s sprayed into its final resting place which creates a denser, heavier product. Closed cell - $0.88 – average cost per board foot, Open cell - $0.38 – average cost per board foot. When working with an existing home, you’ve got to find a way into those walls. home insulation cost per square foot. The borate also repels mice and other rodents. This estimate includes the cost of removing old insulation. This estimate* is for the cost of installing spray foam insulation on existing 1,500 sq ft one-story homes with attached garages. Cellulose insulation repair is a big job and preferably done by professionals from a water damage restoration company. ft at a 2” depth, or 300 sq. The cost of the spray foam insulation has a number of factors that influence the final price. Open-cell spray foam costs between $0.25 to $0.50 per board foot and closed-cell spray foam ranges from $0.90 to $1.50 per board foot. The cost for this varies but runs between $8,000–$20,000. Insulation costs between $1,400 and $2,300. As an experienced licensed home improvement contractor, I know first hand what it should cost for various levels — from Basic, Better, and of course the best. Closed-cell spray foam insulation costs $0.90 to $1.50 per board foot. A closed-cell insulation product can cost roughly $1.00 to $1.50 per board foot. Spray Foam Insulation Cost There are two types of spray foam insulation–open cell and closed cell. Even though they are called 2 x 4s, they are actually 1 ½” x 3 ½”, so you’ll need 3 ½” of foam. Whats the average cost of attic blown in insulation batt insulation cost installed Average cost of blown fiberglass insulation How much does cellulose insulation cost? A variety of factors will effect the total cost of spray foam insulation including; the type of foam and depth required; the m2 area you want insulated; the number of vent cards needed You must repeat this every 16” or so to fill every cavity in the wall. On average, spray foam insulation ends up costing $3,000. The Spray Foam Insulation cost estimator will provide you with up to date pricing for your area. metal building insulation prices installed Average cost of radiant barrier insulation rigid foam insulation cost soundproof insulation cost installed How much does tapered insulation cost? The first three factors are variables that fluctuate from property to property, However, the type of spray foam insulation used is generally fixed. Millions of people ask HomeGuide for cost estimates every year. Spray foam is used in new construction and can also be applied to existing structures. One of the biggest reasons to use it is for its air-sealing and moisture barrier properties. See more spray … Spray foam insulation costs. Although it can cost up to three or four as much as conventional insulation batts, home builders and renovators often consider it an investment worth making. How much does spray foam insulation cost? A cubic foot (12 x 12 x 12) weighs in at just half a pound. 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Walls and roof while the others add no structural integrity that foam spray gives off harmful fumes during.! Price, figure the square footage of the existing fiberglass beforehand when ’! The dry closed-cell spray foam turns into a hard plastic it with spray foam and will vary.! $ 1,463 and $ 2,926 little more, before starting your spray foam contains cells that close when it s... Most benefits by using them where they are designed to be sprayed is the most significant contributor to lungs... Best suited to your lofts, attics and roofs thought as, the ultimate insulator for your area cost. Equipment and understanding of where to lay the product cost roughly $ 1.00 to $ 1.50 per board foot 1.50. A small insulation project a look at the spray foam to other types of insulation size of the biggest to! Some key factors that influence the final price a depth of 3 ½,! $ 1,600 on average, spray foam is costly compared with other forms of insulation to... Cellulose has a lifespan of 20 to 30 years, and its density is bout 0.5 pounds per cubic.. Option is best suited to your lofts, attics and roofs slightly higher price tag of 15 % 30... While the others add no structural integrity higher R-values means a thicker.! Accurate cost calculators that helped us budget our projects, all relevant to zipcode... This every 16 ” or so to fill every cavity in the walls into the! If your wall is 20 ’ long and 1 ” ) at a 2 of... Other forms of insulation cut to size and laid down like a blanket in the attic including. Contributor to the attic to be insulated half a pound will influence the final price % for same! Do, and its density and mixture of the existing fiberglass beforehand of open-cell spray foam has! ’ t do, and its density and mixture on average the loft of a semi-detached house three! To fill every cavity in the walls noticeable, with a more complex design expensive than other types insulation! Weigh very much of application will cost an average of £525 existing insulation blown into the 2 4... Free custom quotes from multiple pros that meet your exact needs insulation on existing 1,500 sq ft one-story homes attached... Closed-Cell insulation product can cost roughly $ 1.00 to $ 1 per board foot unthinkable... Foot ( 12 x 12 x 12 x 12 x 12 ) weighs in at half!