Fitting a pagoda on a flat roof terrace

[jimny1]

I have a flat roof problem where there was a leak which i now managed to solve
I had the roof terrace retiled , tile over tile, but did not replace the membrane, which i regret , 3 years or so later i had water ingress just in one spot where the water was pooling
So i had it painted with the red waterproof solution and it seems to have cured it , even after the recent storms and heavy rain
The problem is i still get pooling in one spot and have to mop up the water after heavy rain to ensure it is kept dry
So i am thinking of installing a pagoda over this area , i already have one by the pool i got from leroy merlin that had a retractable cloth roof which kept ripping , so had metal corrugated panels installed on it instead using the existing metal frame and use it now to store the furniture during the winter
I am now thinking to do the same on the roof terrace where the water is pooling to keep the area dry and also prolong the waterproofed area
But i don't want to drill into the roof tiles to fix the frame and cause another possible leak
I could fix two of the posts to the adjacent terrace wall which is about 4 ft high , then was thinking the pagoda could go over the top of the roof dome we have that i also use for storage and i am constantly painting as it gets weathered very easily, killing two birds with one stone
The problem is how to fix the other two legs securely without bolting to the floor , there is nothing behind to fix the legs to, only the floor
So i thought i would ask if anyone has had something similar done and resolved the problem ?
I know the answer is to get the membrane replaced , but ripping up two sets of tiles and replacing and repairing the membrane would probably amount to a few thousand euros , this a few hundred, and i would have another covered area for sunbed storage etc
Any advice would be welcome
TIA

[freddo]

Buy a wooden shed and place it over the area then seal the bottom to the roof then you will have storage and problem solved

[jimny1]

Buy a wooden shed and place it over the area then seal the bottom to the roof then you will have storage and problem solved

Thanks Fred , that is another good option , i think i would opt for a metal shed though or similar material as wood needs constant painting or staining, i have the same with a wooden fence
I will have a look at leroy merlin etc and get some prices