Help needed to determine if I have calculated for triple pleats/spaces correctly as I have never made any curtain this wide.

I'll try to describe the room.

2 long windows with one pole spanning above both with a timber bracket in the centre. The customer doesn't want to hide the area between the windows as it's a nice feature. I'll attach a pic of something she likes - she wants very long pleats (she is to ask friend to measure the ones in photo). First question can buckram be bought longer than 6"?

Length of pole each side of the bracket is 79". She wants the outside space/return completely back flat as she wants as much light as possible. I have calculated as below but as I've never made anything this wide I wonder if the spaces are too big?

Here goes: 2 windows = she wants 1 curtain only each window. 3 widths x 55" wide fabric = 165"

2 Outside returns 5" each side = 10"

Length of pole 79" + 5" extra for stack back = 84

Finished curtain each side = 94"

2 x 5" returns = 10"

12 spaces x 7" = 84" is this too wide?

Finished curtain = 94"

13 pleats x 5 1/2 = = 71 1/2

Total = 165 1/2

Window in adjoining room pole measures 86" she wants 2 curtains on this.

2 widths of fabric is 110"

Half pole = 43"

plus 2 x 5" side returns = 10"

plus 6" slack = 6"

Total = 59"

2 x 5" = 10"

7 spaces x 7" 49"

8 pleats x 6" 48"

Total =107"

3" over for side hems

I've just done above and realised I haven't allowed for turn over side hems ah...................... Anyone out there please teach me an easier way to work out how many widths/spaces/pleats please.............HELP

[attachment=0:t8fp7zal]mary irwin fabric.jpg[/attachment:t8fp7zal]

I'll try to describe the room.

2 long windows with one pole spanning above both with a timber bracket in the centre. The customer doesn't want to hide the area between the windows as it's a nice feature. I'll attach a pic of something she likes - she wants very long pleats (she is to ask friend to measure the ones in photo). First question can buckram be bought longer than 6"?

Length of pole each side of the bracket is 79". She wants the outside space/return completely back flat as she wants as much light as possible. I have calculated as below but as I've never made anything this wide I wonder if the spaces are too big?

Here goes: 2 windows = she wants 1 curtain only each window. 3 widths x 55" wide fabric = 165"

2 Outside returns 5" each side = 10"

Length of pole 79" + 5" extra for stack back = 84

Finished curtain each side = 94"

2 x 5" returns = 10"

12 spaces x 7" = 84" is this too wide?

Finished curtain = 94"

13 pleats x 5 1/2 = = 71 1/2

Total = 165 1/2

Window in adjoining room pole measures 86" she wants 2 curtains on this.

2 widths of fabric is 110"

Half pole = 43"

plus 2 x 5" side returns = 10"

plus 6" slack = 6"

Total = 59"

2 x 5" = 10"

7 spaces x 7" 49"

8 pleats x 6" 48"

Total =107"

3" over for side hems

I've just done above and realised I haven't allowed for turn over side hems ah...................... Anyone out there please teach me an easier way to work out how many widths/spaces/pleats please.............HELP

[attachment=0:t8fp7zal]mary irwin fabric.jpg[/attachment:t8fp7zal]

## Comment