The things to check regarding the roof are.
Opel tigra roof problems.
Hallo ich habe ein problem mit der hydraulikpumpe die das dach und den kofferraum öffnet und schließt.
On the 2004 2009 vauxhall tigra you have the retractable roof which goes into the boot.
Holden tigra roof wont open windows go down boot.
Partially allow boot to open manually push boot all the way open and closed a dozen or so times to manually pump hydraulics.
The roof on my vauxhall tigra will not click into place the parcel shelf just keeps clicking and it wont finish its cycle.
Try lubricating all accessable moving parts ie the hinge parts with something like wd40 might just be a bit dry and need a bit of maintenance now and then apr 09 2014 vauxhall astra cars trucks 1 answer.
The retractable hardtop roof is put in motion by hydraulic actuators powered by a hydraulic pump.
Your two biggest concerns are hydraulic system issues mainly leaks and weather intrusion fancy name for a leaking roof.
Also as an opel product of a few years ago the tigra needs close scrutiny as build quality.
Check for any dampness in the footwells and carpets.
It is not uncommon to have problems with the roof or the boot.
Common vauxhall tigra twin top and convertible roof problems beeping alarm sound when driving warning the roof is not shut down and locked correctly boot lid catch does not release or you are unable to access boot area convertible roof is stuck open shut.