tri fold door opening size issue

[nottsrob184]

Hi all.
I am building a rear extension to my house (single storey).
I am having tri-fold doors fitted in 5-6 weeks and the window company will make the windows soon once i finish the brickwork.
The problem is this.....they said i needed 2.1M from DPC to lintel ....is this fixed or can they make the doors to suit. The reason being i am about 15mm short of the 2.1Mtr's.
They can make the doors to fit the width but i'm not sure how important the "H" measurement is.
thanks

 

[big-all]

i wouldnt have a clue but would expect around 20- 25mm instilation tollarences
with the lack off product information i would suggest the manufacturer is the best to ask