This document establishes that the repair cannot be confined to the damaged area. TRI Alliance states that wind uplift and fastening performance cannot be validated when discontinued and current tile profiles are mixed on the same roof — a code/engineering objection independent of appearance.
System requirement Tile Roofing Industry Alliance · Roofing · 2026 · 3 pages
Discontinued clay and concrete roof tile — all manufacturers
In their own words
Wind resistance, uplift performance, and fastening geometry cannot be validated when mixing discontinued and current tile profiles.
Tile Roofing Industry Alliance — Discontinued clay and concrete roof tile — all manufacturers, 2026
That sentence is not our characterisation of the manufacturer’s position. It is the manufacturer’s position, in the document below, which you can read yourself in about a minute.
The same document also establishes
Substantively accurate, but note for internal use that TRI does not identify which codes or jurisdictions. It is a trade-body assertion, not a citation to a code section, so it should be presented as TRI's position rather than as an established code requirement.
“Many building codes and engineering standards prohibit partial repairs using mismatched or non-interlocking tile systems.”
Minor citation hygiene: the bulletin numbers itself '2026-04' in its header and on the TRI index page; only the PDF filename reads '2026-004'. Cite as 'TRI Alliance Technical Bulletin 2026-04, April 7, 2026'.
“Discontinued roof tiles are not dimensionally or mechanically compatible with current production profiles.”
The bulletin reads 'Saxony (old Monier/LifeTile/Boral generations)' — 'old', not 'older'. Also flag the basis: this is a trade-body statement; Westlake Royal has published no discontinuation notice for these profiles, which is why 'unverified' as to manufacturer confirmation is the right label.
“Monier tiles are no longer produced in North America; only salvage or replication options exist.”
Get the document
Discontinued clay and concrete roof tile — all manufacturers
Issued by Tile Roofing Industry Alliance. Published here complete — no summary standing in for the document, no email required.
Issued by Tile Roofing Industry Alliance. Retrieved from tileroofing.org, August 2026, and hosted here so it stays available in the version quoted above.
What to do with it
A roof or a wall is an assembly, not a surface. When the manufacturer requires underlayment to lap onto the neighbouring slope, or the water barrier behind siding to be continuous and taped, the damaged area cannot be treated in isolation — and an estimate that prices it that way is describing something that cannot actually be built.
- You have the manufacturer’s document. That part is finished. Most homeowners never get this far, and it is the step a carrier cannot argue with — it is not your opinion, it is the company that made the product.
- Put it in writing, to the adjuster, with the claim number. Attach the document and ask one specific question: name the exact replacement product — manufacturer, line, colour, dimensions, exposure, nail zone, sealant design, supplier, quantity available locally — and who will answer for the repair if it fails. Vague answers are the whole game; a specific question ends it.
- Get the position on the record before anything gets installed. Once a mismatched or incompatible repair is on the building, you are arguing about something already done.
If you want the second and third steps handled by someone who does this for a living, that is what we are for — and the review costs nothing. If you would rather do it yourself, the document above is yours either way. That is the point of publishing it.
Related documents
Other manufacturers saying the same thing
CertainTeed asphalt shingles
The code-evaluation report treats a CertainTeed shingle roof as a complete system — compliant underlayment, the specified starter, hip-and-ridge accessories, and fasteners meeting ASTM F1667. A repair that substitutes non-conforming components does not just look different; it falls outside the report and can forfeit the Class A fire classification.
CertainTeed valleys, walls and chimneys
Open valleys are required for Custom Lok 25 and strongly recommended for Grand Manor, Carriage House, Centennial Slate, Landmark TL, Presidential Shake and Presidential TL — their thickness and multi-layer construction are not designed to bend into a valley. A closed-cut or woven valley repair on those products is contrary to the manufacturer’s own manual.
CertainTeed roof deck spacing
Deck board spacing requirements beneath a CertainTeed roof. Where the existing deck does not meet them, the fix is not confined to the shingles.
CertainTeed vinyl and polymer siding
Vinyl siding is hung, not fixed: nails are centred in elongated slots and driven loose, leaving roughly 1/16″–1/8″ of play so the panel can move with temperature. CertainTeed states that deviating from its requirements voids warranty coverage, and that failing to establish a smooth, solid substrate is itself a misapplication.
The rule this document serves
Your policy promises repair or replacement with material of like kind and quality. That is a replacement-cost and indemnity obligation, not an appearance theory — and it is why “matching” is the carrier’s word, not the policy’s. Where the installed product cannot be bought, or cannot be combined with what is still sold, the covered building cannot be restored to like kind and quality by patching it, and that is true before anyone argues about how it looks. The full doctrine, and the other 125 documents, are on the discontinued materials hub.
You have the manufacturer's document. The next part is the argument. Handing a carrier a technical bulletin and getting it honoured are two different jobs. The case review is free, and you pay nothing unless we recover.
See if my case qualifies 770-230-2616