This document is the manufacturer stating that its own products cannot be combined on one building. Effective July 2, 2013 Atlas changed the dimensions of both lines — from 38¼″ × 13⅛″ to 39⅜″ × 14″ — and stated plainly that the two generations cannot share a roof deck.
Do-not-mix Atlas · Roofing · 2013 · 1 page
Pinnacle and StormMaster Shake Product Changes
In their own words
Do not allow for installations where both old and new shingles are to be installed on a common roof deck.
Atlas — Pinnacle and StormMaster Shake Product Changes, 2013
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
Pinnacle and StormMaster Shake Product Changes
Issued by Atlas. Published here complete — no summary standing in for the document, no email required.
Issued by Atlas. 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
This is the argument carriers least expect, because it does not come from you. When the manufacturer says two of its own products may not share a roof, a repair that combines them is not a cheaper way of doing the job — it is a defective installation, and the party who directed it owns the outcome.
- 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 Atlas documents
Atlas Chalet
Atlas discontinued the Chalet 30-year laminated shingle in mid-2010 and replaced it with the Pinnacle HP line. Chalet went onto tens of thousands of Georgia homes, and it is the single most common discontinued-shingle dispute in this market.
Atlas Chalet
Atlas’s follow-up letter goes further than the discontinuation itself: the Chalet’s proprietary design and physical size differ from current production, so combining old and new raises ASTM compliance problems.
Atlas Chalet
The strongest document in this library. A carrier proposed fixing a Chalet roof by swapping in “comparable” shingles, or by cannibalising shingles from less visible slopes. Atlas’s Consumer Services Manager answered in writing — and the answer is no.
Atlas GlassMaster
Atlas Roofing Corporation confirms in writing that the GlassMaster shingle is no longer manufactured.
Atlas Pinnacle
Three separate dimensional eras of the same product name. Pre-2013 Pinnacle measured 38¼″ × 13⅛″ at a 5⅝″ exposure; 2013–2017 measured 39⅜″ × 14″ at 6″; 2017-on measures 42″ × 14″ at 6″. A “Pinnacle roof” tells you almost nothing until you know which era.
Atlas Pinnacle Pristine
Atlas states a do-not-mix condition between the original Pinnacle Pristine and every later version. It no longer manufactures a shingle at a 5⅝″ exposure or 39⅜″ length, and the current HP42 cannot be installed on the earlier roof.
Other manufacturers saying the same thing
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.
GAF Timberline HD vs. Timberline HDZ
The companion to the discontinuation notice, and the one that closes the loop: the successor product cannot be used to patch the old one. GAF withdraws warranty coverage where the two are mixed.
GAF Camelot
A redesign, not a rename. From January 2015 the new Camelot (SKUs 0695xxx) added reinforcement between the tabs and a new Dura Grip adhesive pattern, and GAF stated the two generations may not be mixed.
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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