Building codes would call for at least 70 mm of high-performance foam insulation or 150 mm of mineral wool insulation (although this will vary depending on floor type, construction, shape, and size). The thicker the layer of insulation, the more heat it will block out. But adding more thickness means also adding more weight to the floor.
The best way to insulate a floor is by using a high-quality product and installing it properly. The manufacturer's instructions should be followed carefully, especially when working with fiberglass insulation. If you cut corners here, you could end up with a floor that isn't fully insulated.
High-quality products such as Rockwool, Silestone, and Battan will not only help your floor stay warm but also look good doing it. They are smooth to the touch and easy to keep clean. You won't have any trouble living with these floors daily wear and tear from shoes, toys, and kids hands.
The thickness of the insulation layer depends on several factors including the type of material used, the climate where the house is located, and how tight the space is between the floor and the subfloor. But as a general rule of thumb, at least 3 inches is recommended.
Depending on where you reside and whether you choose open-cell or closed-cell spray foam insulation, the thickness of foam insulation in basement walls will range between two and seven inches. The goal is to cover all internal wall surfaces with insulation. If necessary, additional layers may be applied.
The optimum amount of insulation required in basements depends on how cold it gets there. If the basement stays warm even during extreme cold snaps, less insulation is needed than if it's used only for storage or as a playroom. Basement walls are typically not insulated under 20 feet high, so any insulation added here will increase the cost significantly.
Basement walls can't be insulated directly under footers or roof beams because there isn't enough room for adequate insulation. Instead, fill the space between footers and basement walls with insulation. You'll also need to insulate ceilings, but they can be done separately if desired. Ceiling insulation should be at least 16 inches high to allow for proper ventilation.
If your basement does not get sunlight for most of the year, then heat loss through windows and doors is not an issue. Insulation is needed only to prevent heat from escaping from the house in the winter and moisture from entering in the summer.
Rigid board insulation is often available in thicknesses ranging from 1/2 inch to 2 inch. For homes in harsh regions, specialized thicknesses of up to 6 inches can be ordered straight from some manufacturers. 28 Farvardin Street, 1399 A.P.O., New York, NY 10027.
The ideal thickness depends on many factors, such as the type of material being used, the temperature extremes it will have to withstand, and how much heat it will need to insulate. But generally, the thicker the better. Thicker boards provide more protection against wind-driven rain, snow, and ice, which can damage thin panels. They also tend to be less flexible than thinner ones, so they can't be used in places where flexibility is important (such as behind walls or under roofs). However, the extra weight caused by thicker materials may be undesirable for some applications.
Thickness is also important when using rigid foam board as an exterior insulation and finish system (EIFS) material because it needs to be thick enough to look good and allow water to drain through it. If it's too thin, it'll just leak away. But even if it isn't visible, thin EIFS can lead to problems with moisture infiltration, which we'll discuss further below.
Q. I'm going to put rigid foam insulation in my crawlspace. Most varieties of rigid foam insulation, as far as I know, cannot be left exposed and must be covered with a layer of drywall for fire protection. Is this true? A. Yes, most rigid foam needs to be covered with fire-retardant material such as plasterboard or fiberglass if it is to meet the requirements of the National Fire Protection Association (NFPA) 101 building code. The type of foam you use should tell you what kind of covering it requires. If in doubt, cover your foam.
The reason for this is that rigid foam has a very low smoke point and will burn if not protected. The type of foam you use determines how much coverage you will need. For example, polyisocyanurate (polyurethane) foam can be covered with one-half inch of gypsum wallboard, while polystyrene foam requires three inches of fiberglass insulation or equivalent fire-resistant material. Never leave combustible materials such as cloth, paper, or wood within reach of the foam.
Always follow the instructions that come with your foam package for proper installation. Some packages require the use of heat-set adhesive, others do not.
10 × 25 = 250 m2 required in square feet As a result, the approximate square footage of insulating material required is 250m2. The depth of your insulation layer will determine the amount you need. If it's only 1/8 inch thick, you'll need about 5 yards; if 1/2 inch thick, 10 yards are required.
The amount you need depends on the type of fiber that makes up the insulation. Cotton and wool fibers are long, thin, and delicate; they're best used in smaller amounts for their warmth-retaining qualities rather than their capacity to keep out cold. By contrast, glass fibers are short and stout; they provide strength and durability where other fibers may be weak. Glass-fiber insulation is commonly used in central heating systems and as roofing material.
Other factors such as type of support structure, temperature extremes, etc. also play a role in determining how much insulation you need. For example, if you're building a wall with wood studs and drywall, you'll need more insulation than if you were building a wall with steel studs and paneling. In addition, if you're living in an area that experiences cold temperatures, you'll need more insulation than if you were living in a climate where heat is abundant.