What an acrylic warranty should and should not cover

Acrylic warranties are usually written by the sheet manufacturer for the sheet, and by the fabricator for the workmanship. They are different documents covering different failures, and most disputes happen because the two were conflated.

Two warranties, not one

Who warrants what

Warranty	Issued by	Covers	Typical term
Sheet warranty	Sheet manufacturer	Yellowing, clarity loss and colour fade under stated exposure	5 to 10 years for UV-stabilised cast
Workmanship warranty	Fabricator	Dimensions, finish, bonding integrity, machining defects	6 to 24 months
Installation warranty	Installer	Fixing, sealing and support	Varies, often 12 months
No warranty covers	n/a	Impact, chemical attack, modification, incorrect cleaning, normal wear	n/a

What the exclusions are really saying

Exclusions look like a supplier avoiding responsibility. Most of them are there because the failure mode is not a material fault, and the honest conversation is about which category a failure falls into.

Impact

Acrylic cracks on impact. A crack from a knock is not a material defect. Distinguishing it from a stress crack is done by looking at the break origin.

Chemical attack

Crazing from an ammonia cleaner is a cleaning failure, not a sheet failure. This is the most common claim we are asked to consider and the least likely to be a warranty matter.

Incorrect fixing

A panel bolted rigid that cracks at a hole failed because of the fixing detail. If we specified the fixing, it is our conversation; if the drawing came from elsewhere, it is a design one.

Thermal movement

A panel with no allowance for expansion that bows or cracks is a design issue, not a material one.

Normal wear

Scratches from cleaning and handling are expected over time and are not defects.

How to make a claim that succeeds

1. Photograph the failure in place, before disturbing anything, and again close up including the break origin.
2. Record the installation date, the cleaning product used, and the temperature range the part sees.
3. Send the part reference and, if it exists, the batch reference from the packing list.
4. State what changed immediately before the failure, if anything: a new cleaner, a new light, a move, a hot spell.
5. Say what outcome is wanted: replacement, repair, or an assessment.

A claim with those five elements can usually be resolved in one exchange. A claim that says only that a part has cracked starts a long correspondence, because the first three questions are always the same.

The distinction we look for

When we assess a failed part, the question is where the crack started and what the initiating stress was.

• From a hole or a fixing: fixing stress, usually thermal movement against a rigid fixing.
• From a bend: forming stress not relieved.
• Along a bond line: solvent stress or a starved bond.
• Across a face with an impact mark: impact.
• All over a surface as a fine network: chemical crazing.
• From an edge with no other feature: handling or transit damage.

The break tells you which. That is why the photographs, and the broken pieces, matter more than the description.

What we commit to

For workmanship, we remake or repair a part that does not meet the drawing or that fails through our process, within the warranty period, at our cost. For material, we supply the sheet manufacturer warranty and the certificate that supports it. What we will not do is warrant a part against a service condition that was never stated, because that is not a warranty, it is a guess.

Questions this article answers

What a claim looks like in practice

Acrylic warranty disputes almost never turn on whether a part failed. They turn on whether the failure is covered, and the answer is decided by three things that are usually not in dispute at the time of sale: what the part was sold to do, what it was exposed to, and whether the installation allowed movement.

Failure	Usually covered?	What decides it
Crack from a mounting hole	Sometimes	Whether the fixing detail allowed movement; slotted holes versus round
Crazing across a face	Rarely	The cleaning agent used — solvent attack is normally excluded
Crack at a bend line	Often	Whether the part was annealed; a documented cycle is the evidence
Yellowing outdoors	Per grade	The grade specified and the exposure; UV grades carry a shorter stated life, not none
Scratch in service	No	Wear, not defect

The evidence that wins a claim is boring: the batch card, the inspection record, and a photograph of the failure in place. A crack photographed in situ shows whether it started at a hole, at a bend, or at an edge — and that single image usually settles which party is responsible before anybody reads a clause.

Two habits prevent most disputes. State the cleaning agent on the quotation, so a crazed part is a protocol issue rather than a material issue. And keep the anneal record with the batch card, so a bend crack can be answered with a document rather than an opinion.

Related reading

• Cleaning and crazing
• Quality system
• FAQ: troubleshooting
• Report a failure
• Auditing a fabricator
• Acrylic outdoors
• Replacing a discontinued part