My Prototype GreenHouse / Storage Shelter made from composite door offcuts featured in Composite Uk trade associations' Sustainability Best Practise Guide 'The Sustainability of Fibre Reinforced Polymer Composites' for Reuse of composite grp /plastics (page 44)

 The Sustainability of Fibre Reinforced Polymer Composites by Composites Uk

 https://compositesuk.co.uk/industry-support/good-practice-guides/ 

 'The guide is free-of-charge, subject to the completion of a short questionnaire, which asks about your company’s sustainability emphasis and concerns. Click the link to be taken to Survey Monkey.'

Download guide here https://uk.surveymonkey.com/r/sustainabilitygpg

I just remembered when building this (to demonstrate 1 person could build it) I also used salvaged part bent dry wall lining metal framing from a Warrington company.

This metal was screwed to the composite door off cut beams to strengthen them. After several years due to the sun heat, the beams have curved down slightly but perfectly functional .

by paul ridley