This document is the manufacturer stating that its own products cannot be combined on one building. Alside (warranted by Associated Materials Innovations, a division of Associated Materials, LLC) states in its Windows and Patio Doors Lifetime Limited Warranty — applicable to products manufactured on or after March 1, 2025 — that replacement parts come only in the standard colour available at the time of the claim, that a colour variance versus the original due to weathering is expected and is not a defect, and that a discontinued product may be settled by refund rather than replacement.
Do-not-mix Alside · Windows · 2 pages
Alside vinyl windows — Lifetime Limited Warranty
In their own words
Replacement parts or components furnished by the Manufacturer under this Warranty will have the standard color available at that time. A color variance may occur between the new replacement part or component in comparison to the original Product due to weathering exposure and would not be indicative of defects in the part or component.
Alside — Alside vinyl windows — Lifetime Limited Warranty
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
Alside vinyl windows — Lifetime Limited Warranty
Issued by Alside. Published here complete — no summary standing in for the document, no email required.
Issued by Alside. Retrieved from alside.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 Alside documents
Alside Vero vinyl window & patio door
Alside's Vero warranty combines the discontinued-style substitution right with an explicit no-aesthetic-match statement.
Alside vinyl siding & soffit
Mastic/Ply Gem states in full capitals that any repair performed without prior written authorization from Ply Gem voids the warranty entirely. The identical all-caps clause appears in the Variform warranty (naming Variform), so the two Cornerstone Building Brands documents share this language.
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.
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