Flat roof insulation

[Unforgiven]

Ok, I hope someone can help me with this one, I have a garage 10.0 x 3.0 m, it has no insulation in the roof whatsoever.

 

I cannot do a warm roof as there is no space above as the house roof is almost touching the garage roof. (Bungalow)

 

The roof joists (200mm) one side are built into the wall, please see photo, so I can't fit over fascia vents. I cant fit upstand vents either as there is not enough room under the house roof.

 

My dilemma is do I fit 23 mushrooms (there are 23 joists) or do I make a hybrid roof with the insulation (Celotex) rammed up right to the deck, foam gun any gaps and fit a VCL?

 

Edited February 1 by Unforgiven

[elite]

Can you do warm roof but take back the house roof to give you the height? You need careful detail around the transition to ensure ventilation into the cold (I assume) house roof. An wider external pic might help others give more suggestions

[FuerteStu]

Do you have pictures of the roof? 

13 hours ago, Unforgiven said:

 

I cannot do a warm roof as there is no space above as the house roof is almost touching the garage roof. (Bungalow)

 

 

It still might be possible. Pictures from the outside?