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Kommerling Premiline 70 mm inline patio 

The definitive quality pvc-u sliding patio door 

We've over 23 years of inline patio door fabrication and the first thing we noticed is that the Kommerling Premiline door contains significantly more pvc-u than any other pvc-u patio door we've ever seen. That's a really good thing for a patio door to have as the primary requirement is the rigidity of the sash and outer frame profiles. Infact it makes other pvc-u inline patios look decidedly lightweight by comparison 

Thicker walls and steel reinforcing as standard