This document establishes that the repair cannot be confined to the damaged area. 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.
System requirement CertainTeed · Siding · 142 pages
Vinyl and Polymer Siding Installation Guide
In their own words
Constitutes misapplication under the terms of the warranty.
CertainTeed — Vinyl and Polymer Siding Installation Guide
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.
Get the document
Vinyl and Polymer Siding Installation Guide
Issued by CertainTeed. Published here complete — no summary standing in for the document, no email required.
Issued by CertainTeed. Held in this firm’s reference library; not published elsewhere. Homeowner-identifying details, where a letter was addressed to a particular property, are blacked out — nothing else is altered, and no operative text is ever redacted.
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 CertainTeed documents
CertainTeed discontinued product register
CertainTeed’s own master register of permanently discontinued and modified lines — the first place to look if your roof is CertainTeed.
CertainTeed Landmark and related lines
Even where the product name has not changed, CertainTeed identifies three conditions that defeat a partial repair on an aging roof: the older shingles have lost pliability, the granule blend has been reformulated, and lines such as Landmark converted from English to metric dimensions.
CertainTeed algae-resistant vs. non-AR
Mixing AR and non-AR shingles produces two defects: an immediate colour difference, and a slower one as algae grows on only half the roof.
CertainTeed roof repair guidelines
CertainTeed’s own repair standard rejects reusing shingles and forbids intermixing metric and English (standard) sizes on one roof. Building codes require installation to follow the manufacturer’s instructions — which makes this document a code argument, not just a preference.
CertainTeed Independence AR · Patriot AR
Independence AR and Patriot AR discontinued across the South Atlantic region excluding Alabama, plus colour deletions across Cedar Crest AR (Chaparral Cedar, Saddle Brown, Slate Gray) and Highland Slate AR (Saddle Brown).
CertainTeed Independence Designer
The manufacturer’s bulletin for a discontinued premium shake-look shingle — Shangle design, 300 lbs. per square, UL Class A, Class 1 impact rated. When the original product is gone, this is the specification a proposed substitute has to be measured against.
Other manufacturers saying the same thing
GAF Lifetime warranty transition
Every GAF laminated shingle installed after January 1, 2011 carries a Lifetime limited warranty regardless of the 30- or 40-year term printed on legacy packaging. Patch a post-2011 roof with old stock or with a non-laminated GAF shingle (Royal Sovereign, Sentinel, Marquis WeatherMax) and you have put material on the roof that does not carry that warranty.
GAF single-plane replacement
The quiet reason a “just do the one slope” scope rarely works. Underlayment has to lap 4″–6″ over the hip or ridge, a 12″–18″ strip must run along it overlapping the new underlayment by 6″–12″, and the end nails of the adjacent shingles have to come out and go back in. The adjacent slopes get disturbed whether or not the estimate says so.
GAF single-plane replacement
The current revision of the single-plane bulletin, with the same lap requirements and an explicit warranty consequence.
GAF existing deck boards
Where the existing deck shows warping or shrinkage, gaps over 1/4″, or has been in place under five years, GAF requires an approved deck to be installed over the boards. That converts a shingle repair into a deck job.
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.
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