I had to declerestorise a Triang roof once, I'd never do it again though. For any foolish enough to be interested, this is how I did it:
Top left - Starting point
Top right - Squares of 2mm plastic card used to brace the inside of the roof before surgery
Middle left - Clerestory portion removed with razor saw and packed out with 2mm plastic card
Middle right - .010 plastic sheet laid to slightly overlap the cut out and endlessly scraped, sanded back and primed to remove the join.
Bottom left - Roof primed and gas lamp tops fitted, Some remedial work remains to be done.
Bottom right - Finished roof, with ventilators added also. This now awaits black paint.
Do not try this at home....
Tony
Top left - Starting point
Top right - Squares of 2mm plastic card used to brace the inside of the roof before surgery
Middle left - Clerestory portion removed with razor saw and packed out with 2mm plastic card
Middle right - .010 plastic sheet laid to slightly overlap the cut out and endlessly scraped, sanded back and primed to remove the join.
Bottom left - Roof primed and gas lamp tops fitted, Some remedial work remains to be done.
Bottom right - Finished roof, with ventilators added also. This now awaits black paint.
Do not try this at home....
Tony