This document is the manufacturer stating that its own products cannot be combined on one building. Englert's warranty states outright that uniform visual appearance is not guaranteed on mill finish Galvalume, and directs buyers to prepainted product if uniform appearance is needed.
Do-not-mixEnglert · Roofing · 2013 · 3 pages
Mill Finish Galvalume (passivated and acrylic coated)
In their own words
On Mill Finish Galvalume, both passivated and acrylic coated, uniform visual appearance is not guaranteed. If uniform visual appearance is necessary or desired then a prepainted product should be purchased.
Englert — Mill Finish Galvalume (passivated and acrylic coated), 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.
The same document also establishes
Same claim; note the 3500 products are named 'PermaColor 3500 ULTRA-Cool®' and 'PermaMetallic 3500 ULTRA-Cool®' low gloss, and cite the document by its actual title: Limited Exterior Building Product Finish/Base Metal Warranty, Revision 5, Reissued 8/1/2013.
“Chalk in excess of eight (8) numerical ratings, when installed 0 degrees to 86 degrees from vertical, when measured in accordance with the standard test procedures as specified under ASTM D4214-89.”
Englert offers no warranty of any duration on prepainted Galvalume installed within one-half mile of seacoast, salt water or brackish water, which forces an aluminum substrate in coastal repairs.
“Englert does not offer any warranty for any period of time on prepainted Galvalume®.”
Get the document
Mill Finish Galvalume (passivated and acrylic coated)
Issued by Englert. Published here complete — no summary standing in for the document, no email required.
Issued by Englert. Retrieved from englertinc.com, August 2026, and hosted here so it stays available in the version quoted above.
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 manufacturers saying the same thing
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 · StormMaster Shake
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.
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.
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.
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 877-650-3515