i second that..i try to use millboard where i can..as soon as you explain the fact its pretty much maintenance free to the client, it usually goes down well..plus from an installers point of view its a dream…wide units no pre drilling,clips,sanding,oiling..cuts well even with a hand saw if you have too!…plus the step edge and bullnose accessories can really make a difference on the look of a job…plus its made in the Midlands not china!
although the hdpe has its advantages over pine in wet conditions..ive found it a different beast entirely to work with compared to softwood..as karl has said it needs bolting..screws just wont bite..they spin and ultimately shear