What's the best type of outside door. We've had a composite door about 3 years and we are on panel 4 already, 2 warped very badly the 3rd grew great big bubbles where surface started to delaminate and the 4th has now started to swell around the lock and hook lock it's 5mm wider at these points. The supplier has been great all panels replaced without any quibbles thing is after this latest problem they are offering to replace the whole door and frame but should I ask for a refund or is there a better option. They can't find a reason why this is happening and they are a very big national outfit, 1 fitter said it could be the south facing location though as he said it's Yorkshire not the med. Am I just replacing something to get more trouble