custom wood blinds
December 19th, 2009 by oramageWindow Coverings Association of America
When measuring windows for custom blinds you first need to decide if you will install the blinds using an inside mount or an outside mount. Below I explain the differences between an inside and outside mount and how to measure your window for each.
No matter which type of mount you will be using for the blinds, these measuring basics will apply. Use a metal tape measure instead of a fabric or paper tape measure. Metal tape measures provide a more accurate measurement since fabric and paper can stretch. The tape measure should also be longer than the area you need to measure for the best accuracy. Write the measurements down, clearly marking which is width and which is height. Take all measurements needed and then do the measurements a second time verifying against your written measurements. When ordering custom blinds, the measurements must be correct or you may have custom blinds that do not fit the window for which you purchased them.
An inside mount is where the blind will be recessed within the window casing. With an outside mount the blinds will be mounted on the window casing or on the wall above the window. Use the following instructions based on which mount you will use.
How to measure windows for an inside mount:
Measure inside of the window casing, side to side for the width of the blind and top to bottom for the length. Measuring to the nearest 1/8″, as suggested on www.nobrainerblinds.com, will provide the best fit and light coverage. Measure the width three times, first at the top of the window, then near the middle, and finally near the bottom. Do the same for the length, measuring near the left edge of the window, around the center, and finally near the right edge. For the width, use the smallest measurement to ensure the blind will not rub against the window casing anywhere from top to bottom. For the length, use the longest to ensure coverage all the way to the bottom.
Do not reduce the width measurement as an allowance so the blind will not rub against the window casing. Custom blind manufacturers will automatically subtract a small amount from the width measurement to ensure proper fit of their product, as noted on www.nobrainerblinds.com and www.northernblinds.com.
How to measure windows for an outside mount:
Measuring for an outside mount does not need to be as precise as for an inside mount, since the blind will cover the entire window including the casing instead of needing to fit within the window casing. The critical step is to ensure that the screw positions needed for mounting can actually be used. If you plan to mount the blind on the wall above the window casing, you will need to verify that the required wall anchor or suitable screw can be placed through the wall at the exact positions required by the mounting bar of the blind.
There is a variety of wood or metal studs and fasteners under the drywall or plaster around all window and door openings. These are what attaches the window or door to the building and can extend several inches outward from the window. When attempting to install a pleated blind on a glass patio door, I encountered this problem. I planned to mount the blind above the patio door casing and ordered it just wide enough to cover the patio door casing from side to side. As it turned out the exact positions needed for the outer most screws were too close to the edges of the underlying wood studs. The screws would not held securely by the wood studs and wall anchors could not be used since the wood studs were in the way. Since I did not have enough width to shift the blind over, I had to mount the blind 1 inch higher than planned, causing the blind to be too short when fully lowered.
With an outside mount you can have the blind extend past the window several inches for better light coverage. You need to determine where to mount the blind and how far past the window on each side the blind will cover. Then measure the outside of the window casing. For width, once near the top, then near the middle, and finally near the bottom. For the length, measure once near the left outer edge, then near the center, and finally near the right outer edge.
Using the largest measurement for both width and length. Now add to the length measurement the amount needed to mount the blind above the window and the amount below the window you would like the blind to lay when fully lowered. For example, if the window is 42 1/2″ long, the blind will be mounted 2 1/2″ above the window, with 2″ extending below the window, your length measurement will be 47″ (42 ½ + 2 ½ + 2). If the window is 30 1/4″ wide and you would like the blind to extend 2 1/2″ past the window casing on both side, your width measurement will be 35 1/4″ (30 ¼ + 2 ½ + 2 ½).
Ought you require help in selecting curtains or blinds for your home then check out Window Coverings Association of America for more detailed information about how to design your space to fit your interior.
