Measuring for Aesthetic Mounted Shutters
- To determine shutter width, take the window sash width and divide by two. This number will determine the width of each shutter for that window. For Bahama type shutters do not divide by two.
- The shutter height is determined by the window sash height. For aesthetic mounts it is best to round to the nearest whole number.
Window sash width measurement= Shutter Width (round to nearest whole number) 2
Sash height (round to nearest whole number) = Shutter height
For arched windows additional measurements will be needed.
- The first step is to measure from the bottom of the sash to the peak or the highest point of the arch. This measurement is called the high side of the arch or the shutter height.
- Then measure from the outside bottom edge of the sash to the lowest point of the arch. This measurement is called the low side of the arch.
- If your window has a half round circle on the top simply request a quarter round arch on each shutter. The arch low side will be equal to the width of the shutter.
Measuring For Functional Shutters
Several factors must be taken into consideration when measuring for functional shutters.
- Are the shutters going to be closing into a pocket or window opening?
- Will they be surface mounted on the face of the structure?
- What kind of hardware will be used to mount the shutters?
- When shutters are closing into a pocket measure across the opening at the top, middle and bottom of the opening and use the smallest of these measurements.
- For pintel and strap type hardware deduct ½" for side clearance and a small space between the shutters when the shutters are closed.
- When using butt style or jamb hinges the thickness of the hinge in the closed position must be deducted. This should be deducted once for single shutter application and twice when installing a pair of shutters in a window opening.
- Also deduct 1⁄8" for the space between the shutters when in the closed position.
Once the measurements have been taken and the proper deductions subtracted the remaining amount should be divided by two to determine the shutter width. For Bahama type shutters do not divide by two.
The shutter height is simply the pocket height less ½".
For arched windows additional measurements will be needed.
- The first step is to measure from the bottom of the opening to the peak or the highest point of the arch in the opening. This measurement is called the high side of the opening or the opening height.
- Then measure from the outside bottom edge of the opening to the lowest point of the arch in the opening. This measurement is called the low side of the opening.
- If your opening has a half round circle on the top simply request a quarter round arch on each shutter. The arch low side will be equal to half the width of the opening.
- Be sure to deduct ½" from both the high and low side of the arch when determining the shutter height.
To determine the proper shutter dimensions for surface mounted shutters or shutters closing on the outside of the window pocket follow the following steps.
- To determine the shutter width measure across the face of the structure from one side to the other where the shutters will be placed when in the closed position.
- Then deduct 1⁄8" for the gap between the shutters when in the closed position.
- Divide this number by two to get the shutter width. For Bahama type shutters do not deduct 1⁄8" for the gap in the middle and do not divide by two.
- To determine the shutter height measure the structure from top to bottom where the shutter will be when in the closed position.
Make sure there are no obstructions such as hose pipe faucet, roof line, electrical outlets, electrical panels, light fixtures or out door speakers on either side of the window that the shutter will hit when in the open position. In general know where the shutter will be positioned when in the open position.
Choosing Correct Shutter Hardware
There are several questions that must be answered about the structure the shutters will be mounted on before selecting the correct shutter hinges.
- What type of siding is on the structure around the window (brick, cedar lap, hardy plank, shake etc...)?
- What type of molding (180 brick mold, 1x4 flat mold etc....) is around the window or does the siding material butt up to the window with no molding at all?
- What is the return depth in inches from the outside edge of the trim board to the face of the sash itself?
- How deep is the pocket or frame the shutter will close into?
- Where will the pintel be placed?
There are four basic types of shutter hardware.
- Pintel and strap hinge combinations
- Surface or plate mounted hinges
- Mortised butt hinges
- Bahama hardware
Pintel and Strap Hinge Combinations
- When using pintel and strap hinge combinations the first step is to determine where the pintel should be located on the structure. If the window has trim around it with a flat surface at least 1" wide the pintel should be placed on the trim. The shutters will then close into the pocket created by the trim. If the window does not have any trim then the pintel will have to be placed on the face of the structure beside the window and the shutters will close into the window opening. In this situation the structure siding is usually a masonry product or a siding material that is not flat such as shakes or lap siding. A lag pintel is the best option in this situation as it does not require a flat surface and only requires a single pilot hole to be drilled into the structure. It can be screwed into a led shield in masonry applications. Plate pintels come in ½", 1 ½", 2 ¼" and 31⁄4" offsets and the lag pintel measures 4" long and has an offset of 1 ¼" when screwed in all the way to the shoulder.
- The strap is the part of the hinge that is applied to the shutter. It is normally mounted at the top and bottom on the back of the shutter when in the open position. A third hinge strap may be necessary on tall shutters and can be placed at the center rail. Hinge straps come in 0", ½", 1 ½" and 2 ¼" offsets and are available in 11" straight and New York L styles.
- The next step is to choose the correct offset of the pintel and strap in order to throw the shutter out and around the siding material when open and make sure the shutter does not hit the sash when in the closed position. The amount of hinge throw is determined by adding the pintel and strap offset together. Keep in mind the hinge straps can be turned around and used backwards to achieve the correct hinge throw.
- Be sure when making these calculations to figure the thickness of the shutter including any hardware that will be applied to the face of the shutter such as pull rings or slide bolts.
- Pintel and strap hinge combinations can be used to close a shutter into a pocket or close the shutter on the outside of the opening in surface mounting applications.
Surface or Plate Mounted Hinges
- Clark tip surface or plate mounted hinges are mounted on the face of the molding or structure and the face of the shutter. They then open and throw the shutter out onto the face of the structure. They are available in 1 ¼" and 3 ¼" offsets. The pocket the shutter closes into must be at least the same thickness as the shutter including any hardware mounted to the face of the shutter such as pull rings or slide bolts. If the pocket is not deep enough the hinge can be shimmed out using wood blocks. This hinge is not a good choice for surface mounting a shutter.
Mortised Butt Hinges
- Acme mortised butt hinges are mounted on the inside edge of the opening the shutters are closing into and swing the shutter out onto the face of the structure. They are available in throws of 1 3⁄8" , 2", 23⁄4" , 31⁄8", 35⁄8" , 4 ¼" and 6 ¼". The pocket the shutter closes into must be at least the same thickness as the shutter including any hardware mounted to the face of the shutter such as pull rings or slide bolts. This hinge will not work for surface mounting a shutter.
Bahama Style Hinging
- Bahama shutter hinges are mounted at the top of the shutter panel allowing the shutter to pivot out from the bottom.
- All Bahama shutters are propped out from the bottom on each side using Bahama push rods. They attach to the structure behind each side at the base of the shutter and to the shutter in the collapsed position on the side style. They extend from 14" to 22" and adjust with a thumb screw. They are 1 ¼" in diameter.
- Pintel and strap hinge combinations are an excellent option for mounting a shutter from the top. Use the same procedure as described above in Pintel and Strap Hinge Combinations to determine the correct offset and throw for your Bahama panel. Bahama shutter panels can be mounted to close into a pocket or to surface mount onto the face of a structure. Be sure to offset the shutter panel out far enough to allow 1 ½" for the push rods when the panel is in the closed position.
Bahama shutter build out hinge is an extruded aluminum two piece hinge that is the same width as the shutter. It is available in 1 3⁄8" and 2 3⁄8" offsets and can be used to surface mount or close the shutter into a pocket.