Dated reference register
Sources and research register
Each external source is recorded once. Worksheet notes link to these stable anchors so a title, URL or access date can be corrected in one place.
7 source records
An available page is not automatically authority for every claim. The note beside each record states the limited reason it is included. External links are ordinary citations only; this site does not load them as runtime resources.
everest-measuring-guide
Everest
Accessed 2026-09-04
How to Measure for a New Door (or replacement) | Everest Doors
Distinguishes measurements taken from a door slab, frame opening and other opening conditions.
doors2floors-size-guide
Doors2Floors
Accessed 2026-09-04
Internal Door Size Guide | UK Sizes – Doors2Floors
Secondary reference for conventional UK door dimensions and size terminology.
jeldwen-trimming
JELD-WEN
Accessed 2026-09-04
How much can I trim my interior door? | JELD-WEN
Shows that trimming allowances depend on the particular door construction and instructions.
jeldwen-trimming-warranty
JELD-WEN
Accessed 2026-09-04
Will trimming my door have an effect on my warranty or guarantee? | JELD-WEN
Manufacturer FAQ connecting excessive trimming with guarantee conditions.
doors2floors-hinge-guide
Doors2Floors
Accessed 2026-09-04
Where to Fit Door Hinges: Positions, Sizes & Spacing UK – Doors2Floors
Secondary guide to commonly used hinge-position starting conventions.
longden-weight-calculator
Longden Doors
Accessed 2026-09-04
Timbers Calculators | Longden Doors UK
Example of approximate door-mass calculation as a practical page type.
hse-manual-handling
Health and Safety Executive
Accessed 2026-09-04
Manual handling at work - HSE
Frames handling as a process of avoiding, assessing and reducing risk rather than one universal weight threshold.
gov-fire-door
GOV.UK
Accessed 2026-09-04
Fire Safety (England) Regulations 2022: fire door guidance (accessible) - GOV.UK
Official England guidance; the extracted passage says an inadequate existing fire door requiring replacement must be replaced by a competent person and fire doors must be kept in good order. Apply only within the guidance scope.
hse-assess-manual-handling
Health and Safety Executive
Accessed 2026-09-04
Manual handling at work: Assess manual handling you can't avoid - HSE
Manual-handling assessment considers the task, load, working environment and individual capability; weight is one factor rather than a universal safe-lift threshold.
wickes-fix-door-problems
Wickes
Accessed 2026-09-04
How to Fix Door Problems | Wickes.co.uk
Merchant guidance for an observation-and-check sequence, not a universal standard, certain diagnosis or permission for destructive work.
wickes-hang-internal-door
Wickes
Accessed 2026-09-04
How to Hang an Internal Door | Wickes
Merchant guidance for a general internal-door sequence; its gaps and offsets are not universal standards or evidence of fire-door compliance.
wickes-fit-architrave
Wickes
Accessed 2026-09-04
How to Fit Architrave | Wickes
Merchant guidance supporting ordinary UK DIY usage of architrave, not a universal regional or manufacturer terminology rule.
doorsuperstore-fit-door-frame
Door Superstore
Accessed 2026-09-04
How to fit door frames - Door Superstore Help & Advice
Merchant guidance for a general assembly and checking sequence, not a standard; its conflicting hinge-side-only jamb wording is excluded.
doorsuperstore-fit-door-lining
Door Superstore
Accessed 2026-09-04
How to fit a door lining - Door Superstore Help & Advice
Merchant guidance for a general assembly and checking sequence; its conflicting equation of a whole lining with a jamb is excluded.
doorsuperstore-replace-door-frame
Door Superstore
Accessed 2026-09-04
How to replace a door frame - Door Superstore Help & Advice
Merchant sequence guidance only; its fixing positions are not universal, conflict with product-specific instructions and do not support structural-opening verdicts.
doorsuperstore-standard-door-frame-sizes
Door Superstore
Accessed 2026-09-04
Standard door frame sizes in the UK - Door Superstore Help & Advice
Merchant terminology guidance only; no dimensional values are accepted from its malformed copy and it does not establish a universal size or taxonomy.
doorsuperstore-butt-hinge-definition
Door Superstore
Accessed 2026-09-04
What is a butt hinge? - Door Superstore Help & Advice
Merchant evidence for basic hinge-part names only, not universal load, durability, fire-rating or product-selection claims.
doorsuperstore-fit-butt-hinge
Door Superstore
Accessed 2026-09-04
How to fit a butt hinge - Door Superstore Help & Advice
Merchant evidence for the literal marking, mortising, transfer and mating-recess sequence only; case/carcase wording, dimensions and screw patterns are not universalized.
bwf-joinery-woodworking-glossary
British Woodworking Federation
Accessed 2026-09-04
Glossary of Joinery and Woodworking Terms - British Woodworking Federation
BWF-attributed industry-body glossary usage, not proof of a universal regional taxonomy, product rule or standard.
dhf-timber-doorsets
Door & Hardware Federation
Accessed 2026-09-04
dhf | Timber Doorsets
Supports door leaf as a named timber-doorset component and the quoted composition and forms only; it does not define slab or prescribe universal assembly rules.
cambridge-threshold
Cambridge Dictionary
Accessed 2026-09-04
THRESHOLD | English meaning - Cambridge Dictionary
Supports only the physical doorway sense of threshold; it is not product guidance and does not establish threshold-versus-sill equivalence or distinction.