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Checklists · Envelope

External Door Specification Questions Checklist

Gives an owner a structured way to describe an existing external doorway, record how it is used and where it is exposed, and turn security, glazing and finish concerns into questions for a supplier, installer or qualified professional.

Project stage:Early planningBrief and scopeChoosing professionals

8 sections · 40 planning prompts · educational owner-side preparation

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The checklist

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More preparation

Related checklists

Bifold and Sliding DoorsBefore a wide glazed opening is ordered: how it will really be used, where the panels go when open, what the threshold has to do, and which points belong with professionals.External Wall InsulationPreparation for wrapping the outside of a house: what the elevations carry today, where the building line would change, and which detailing questions to put to a professional.External Repair PriorityA way to list external repairs elevation by elevation, separate water getting in from ordinary wear, and record what has to happen before anything else is worth doing.Window Specification QuestionsTurning what you want from a window into something a supplier can work from: what each opening must do, frame trade-offs, operation, exposure and what to state in writing.Rainwater Goods QuestionsGetting ready to talk about gutters and downpipes: where the water runs off, where it overshoots, where each pipe discharges and who owns what at a shared boundary.Render and Cladding DecisionsWhat a new external finish would sit on, how much thickness it adds, where it has to stop at every edge, and what repairing it in later years would actually involve.Shading and Solar GainA preparation checklist for owners recording where sun reaches a building, which rooms become uncomfortable and when, so shading and glazing can be raised as questions.Airtightness ConversationGet ready to talk about draughts and sealing: where air moves now, the openings already in the fabric, who owns the sealing line, and what testing would actually tell you.

Inspiration

Related Ideas Library pages

Design directions to explore once the preparation is done.

Go deeper

Related Build Design Hub guides

Explanatory planning guidance behind the decisions on this page.

Building Envelope & Openings Checklists

Preparation checklists for walls, roofs, insulation, windows and doors — describing the building you have and the questions to raise about performance.

Browse all Envelope & Openings checklists →