Managing Obstructions

Obstructions could be inward opening windows or fly screens. These will not be accessible if you inside mount your shutter. Other obstructions, such as window winders, handles, locks, keys, alarm boxes are fine - as long as you have enough clearance between the end of your obstruction to the end of the recess.

As a general rule, 70mm of clearance is required so that the shutter blades can be opened completely without hitting the window. However the exact clearance required ultimately depends on the type of frame you will be using.  You may still be able to Inside Mount if you have less than 70mm between your obstruction and recess.

To learn more, read our article on Measuring for a Recess.

To begin with, it's important to differentiate between the shutter panels and the frame itself. The frame will create a border around the inside of your window recess, while the shutters will hinge inside the frame. The shutters sit inside the grooves of the frame, and therefore require less depth to be mounted. However, we need extra clearance for the louvers (shutter blades) to fully open. In other words, there are various measurements that need to be taken, depending on where the obstructions sits on the window.

 

MANAGING OBSTRUCTIONS FOR A Z-FRAME

 

Z-frame mounts inside the recess and creates a lip around the outer frame. A Z-frame requires 39mm of clearance to fit inside the recess.

 

Obstruction Diagrams Z 3d2

 


Obstructions on the outer-edges of your window recess

If your obstruction is on the very bottom, top or sides of your window (i.e. up to 29mm from the recess), you will need to measure from the obstruction to the edge of the recess. If you have 39mm of clearance, you will be able to mount a Z-frame. Keep in mind, frames won't open once installed so you may want to allow for an extra few millimetres in order to access obstructions!

 

Obstruction Diagrams Z Frame

 

 


Obstructions located towards the top or bottom of your window recess

If your obstruction is located at the bottom or top of your window, but beyond where the frame is mounted (i.e. further than 29mm from the bottom/top of the recess), we need to consider bottom and top rails. Bottom and top rails look like shutter louvers, but don't open and close. To clear (and access) obstructions behind bottom or top rails, you must have at least 20mm of depth.

 

Obstruction Diagrams Z Rail

 

 

Obstructions located towards the centre of the window

Bottom and top rails are generally between 85mm and 148mm in height. If your obstruction is located 114mm from the bottom or top of your recess, you will need to consider whether your blades will open properly.

If your obstruction is located further towards the centre of the window, you need to be sure that louvers (shutter blades) will open fully without hitting the obstructions. You must have 55mm of clearance to ensure that louvers can be full opened. You don't need to worry about accessing obstructions, as shutter panels can be opened to reach winders, handles or keys.

 

Obstruction Diagrams Z Blades

 

If you don't have 55mm clearance to allow for louvres to open, you can always add a midrail to your shutters. Since midrails don't open, you will only need 20mm to clear the obstruction. The same rules apply here as top or bottom rails (see above), only in the centre of your window.

 

Obstruction Diagrams Z Blades with Midrail

 

 

Obstructions on the sides of your window recess

If your obstruction is on the side of the window, but beyond where the frame is mounted (i.e. further than 29mm from either the side of the recess), then you must have 20mm of clearance. However, if your obstruction is more than 70mm from the side of the wall, you will need to be aware of louvres opening (see above).

Screen Shot 2018 02 20 at 2.04.10 pm

 

Summary: Managing obstructions for an inside z-frame

Obstruction Diagrams Z All

 

To learn more, read our article on Z-frames

 

 

MANAGING OBSTRUCTIONS FOR AN L-FRAME

  

An L-frame fits inside the recess and can be mounted flush against the wall or  sit back from the wall at any desired depth. An L-frame requires 65mm of clearance to fit inside the recess.

Obstruction Diagrams L 3d

 

 

Obstructions on outer-edges of your window recess

If your obstruction is on the very bottom, top or sides of your window (i.e. up to 35mm from the recess), you will need to measure from the obstruction to the edge of the recess. If you have 65mm of clearance, you will be able to mount an L-frame. Keep in mind, frames won't open once installed so you may want to allow for an extra few millimetres in order to access obstructions!

Obstruction Diagrams L Frame

 

Obstructions located towards the bottom or top of your window recess

If your obstruction is located at the bottom or top of your window, but beyond where the frame is mounted (i.e. further than 35mm from the bottom/top of the recess), we need to consider bottom and top rails. Bottom and top rails look like shutter louvers, but don't open and close. To clear (and access) obstructions behind top or bottom rails, you must have at least 29mm of depth.

 

Obstruction Diagrams L Rail

 

 

obstructions located towards the centre of your window

Bottom and top rails are generally between 85mm and 148mm in height. If your obstruction is located 150mm from the bottom or top of your recess, you will need to consider whether your blades will open properly (see below).

If your obstruction is located further towards the centre of the window, you need to be sure that louvers (shutter blades) will open fully without hitting the obstructions. You must have 65mm of clearance to ensure that louvers can be full opened. You don't need to worry about accessing obstructions, as shutter panels can be opened to reach winders, handles or keys.

 

Obstruction Diagrams L Blades

 

If you don't have 65mm clearance to allow for blades to open, you can always add a midrail to your shutters. Since midrails don't open like blades, you will only need 29mm to clear the obstruction. The same rules apply here as top or bottom rails (see above), only in the centre of your window.

 

Obstruction Diagrams L Blades with Midrail2

 

 

Obstructions located on the sides of your window recess

If your obstruction is on the side of the window, but beyond where the frame is mounted (i.e. further than 35mm from either the side of the recess), then you must have 29mm of clearance. However, if your obstruction is more than 78mm from the side of the wall, you will need to be aware of louvres opening (see above).

Screen Shot 2018 02 20 at 5.22.11 pm


Summary: Managing obstructions for an inside L-frame

Obstruction Diagrams L All

 

To learn more, read our article on L-Frames.

Start Designing your Shutters now!

 

 

0 0

Was this article helpful?

Gilad Baker
By: Gilad Baker Published: 12 Feb 2018