Hi. I have just had a 4m x 4m Victorian style conservatory built. Brick dwarf wall, uPVC coated aluminium frame with K glass double glazing and an aluminium framed, 30-degree pitched roof with uPVC capping. The roofing material is polycarbonate, but I am assured that the frame will support a glass roof if required at a later date. (Crawling on the roof is highly unlikely given its material, and the roof has survived high autumn winds without missing a beat). So unless and until I install a glass roof, I would like to omit the Tie-bar inside, which is pig ugly! Is this safe? Many thanks