Measuring instructions vertical blinds for bifolding doors


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Stacking Options & Stacking Sizes

For large vertical blinds, it is important to know how much room is taken up by the louvres when they are stacked together.

One-way left

Split

One-way right

Slat Size

There are two slat sizes to choose from, 89mm and 127mm. Vertical blinds with 89mm slats contain more louvres than those with 127mm slats.

Sometimes people opt for 127mm slats as there are fewer slats and therefore a smaller stack.

However, there is a larger choice of fabrics for 89mm slats.

vertical blinds for bifold doors - slat-sizes

	metre	1	2	2.5	3	3.5	4	4.5	5
	cm	100	200	250	300	350	400	450	500
	mm	1000	2000	2500	3000	3500	4000	4500	5000
	inches	39	79	98	118	138	157	177	197
one-way opening	89mm slats	18.5 cm	31.5 cm	38 cm	44.5 cm	51 cm	57.5 cm	64 cm	70.5 cm
split opening	89mm slats	11.5 cm	18.5 cm	22 cm	25.5 cm	29 cm	32.5 cm	36 cm	39.5 cm
one-way opening	127mm slats	16.4 cm	25.4 cm	29.9 cm	34.4 cm	38.9 cm	43.4 cm	47.9 cm	52.4 cm
split opening	127mm slats	12.4 cm	17.4 cm	19.9 cm	22.4 cm	24.9 cm	27.4 cm	29.9 cm	32.4 cm

Vertical blinds can be fitted on the inside recess or outside recess of bifold doors.

Outside Recess

This is a good option if you do not want to obstruct the glass with the blinds when they are open or the doors open inwards.

Fitting vertical blinds on the outside recess allows you to draw the blinds fully open past the door recess so the louvres sit over the walls rather than the door recess. Face-fix brackets are needed for this fit.

Width

When measuring the width you want the blind to be on the outside recess you need to consider the stacking depth. This will depend on the slat's width and the opening you have chosen.

Once you have measured the width at the top where the vertical blind track will be fitted, use the table below to determine the stacking depth. Check whether the stack is likely to fit in over the wall and whether that is suitable for you.

Drop
Measure the drop from when the track will be fitted to where you want the fabric to finish.
Measure at least 4 points across the doors and use the smallest drop. We recommend the fabric to finish an inch above the floor.

vertical blinds for bifold doors - outside recess width and drop

Inside Recess

When fitting vertical blinds in the inside recess they fit neatly in the recessed space as shown below.

Width

Measure the width of the inside recess at 3 points, making sure the top of the recess and the skirting recess are measured.

Use the smallest measurement.

Drop
Measure the width of the inside recess at 3 points, making sure the top of the recess and the skirting recess are measured.
Use the smallest measurement.