Door-Stop Composite Doors SUPPLIERS INSTALLERS MPN WALES LOCAL VALUE QUALITY AFFORDABLE PRICES QUOTES AND COST. They calculate and certify the thermal performance of every door, making Door-Stop composite doors ideal for energy efficient homes. Get a Quote price and low cost supply and fitting in Wales with MPN. Call or text us for your new or replacement Door-Stop Composite Door. The door can be as individual as you like. Three new door colours; Poppy Red, Duck Egg Blue and Black Brown, have added to our existing ten; White, Black, Blue, Red, Green, Oak, Darkwood, Cream, Grey and Chartwell Green.