R values for windows

Explore all our window offerings , and then get in touch with any questions about optimal R- and U-values for your replacement windows. Virtual or In-Home? I need replacements As soon as possible Within 3 months Within a year I just have a few questions Message Phone This field is for validation purposes and should be left unchanged.

Jan 3, The R-value is a measure of heat resistance, and is an assessment of material effectiveness. The U-value measures heat transfer loss or gain through the actual glass. U-value does not rate the specific material like the R-value does.

Rather, U-value is a calculation of the conduction properties of various materials that make up the window. A fully recessed honeycomb cellular opaque shade adds on average, 3. The shades double the efficiency of the R A standard Aluminum blind in a double glazed window carries an R-value of 2. A single cellular shade on that same window creates an R-value between 3.

But a double or triple honeycomb cellular shade creates an R-value of 4. This is a substantial saving on energy costs. If the Total R-value of a window space is considered, it is the sum of all the layers of material, from the inner blinds, through the window and out of the window film, if any.

Even the air trapped between the layers of window dressings contribute to its total R-value. When calculating the R-value of a multi-layered installation, add the R-values of the individual layers.

All window treatments are not created equally considering R-values and energy savings. Typical Horizontal blinds have an average R-value of 2. By increasing the R-value of a window covering one can decrease on energy bills. Some window coverings in the approximate order of ability to resist heat flow —.

The above values are accorded for blinds, shades, and shutters in a closed position. While standard blinds and curtains have an R-value of just 1, energy saving window coverings with an insulation layer, like the honeycomb shades and curtains with thermal linings can have an R-value of 6. Hardwood shutters with adjustable louvers or wooden blinds have much lower insulation values because of the gaps between the louvers or slats that let considerable air flow through while shutters with foam cores and paneling have insulating values of 3.

The energy efficiency of foam cored shutters again depends on the snugness of the fit between the shutter edges and window and on the thickness and type of insulating foam used in the shutter.

An attractive closed honeycomb cell design creates pockets of air that insulate windows from heat and cold to lower energy bills year round. These Insulating Cellular Shades are customizable with four opacity levels and three cell sizes:. The two primary factors that influence a shades ability to resist heat transfer are material thickness and airspace.

Material thickness Airspace —. Homeowners should consider installing windows with higher R-values because these windows have the ability to resist conduction. U-Values refers to the amount of heat your windows allow through to the inside of your home. Windows with a lower U-value are better at keeping your home comfortable and saving you money on utility costs. There are many types of windows, and each type has an associated R-value that is important to your decision to purchase your replacement windows.

The following are some examples of windows and their associated U-values. Single glass windows. Aluminum framed single glass windows with thermal break offers the lowest U-value for single glass windows, making them more efficient than the option to get them without the thermal break. These windows have a U-value of 1. Call 1 with any questions. Apply Coupon. Front doors, interior doors, any oversized door wider that 4ft and taller than 7ft and any special order doors have shipping costs which are calculated at checkout.

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