A buyer searching for AAC Block is usually trying to stop a bad substitute. A building material is specified by the grade, the dimensions, the standard, and the exposure of the assembly. The notes below are selection criteria for an AAC Block. They are not a catalog promise. Confirm every rating on the current datasheet, drawing, or test report for the revision you will receive.
What has to be true of AAC Block
A building material is specified by the grade, the dimensions, the standard, and the exposure of the assembly. For an AAC Block, start from the duty, then the interface to the rest of the machine or the room, then the document that proves the claim. A lower price that leaves one of those blank is a different product.
AAC Block is easy to confuse with Door Frame. If the quote could be read as either, add the line that separates them: the rating, the fitment, or the standard named below. Link the drawing number to that line so receiving inspection can reject the wrong one.
Numbers that change the quote
| Line | What to write for AAC Block |
|---|---|
| Standard | The product standard the supplier will mark on the delivery. |
| Exposure | Interior, exterior, wet, or structural. |
| Fire and thermal | Any fire class or insulation value the assembly needs. |
| Traceability | Lot or mill documents when the work is structural. |
| Grade | Strength, class, or mix, using the name the standard uses. |
| Dimensions | Size, thickness, and tolerance. |
How to compare two offers
Lay both quotes for AAC Block on one sheet and line up standard, exposure, and fire and thermal. If a cell is empty, the offer is not finished. Ask for the missing line in writing. When those match, the honest difference is lead time, the test evidence, and who carries the warranty. Do not average a fully specified AAC Block with a cheaper line that omitted standard.
Documents worth having before the deposit
Ask for the declaration of performance or the mill certificate the market expects. The file should name AAC Block and the revision, not only the supplier’s homepage. A factory quality certificate such as ISO 9001 can sit beside that file. It does not replace it.
Failures that show up after delivery
- Cutting a rated assembly and assuming the fire class survived.
- Accepting a visual match with a lower strength class.
- Leaving moisture and storage out of a cement or timber order.
On an AAC Block, the expensive version of the first mistake is discovering it after the goods are in the crate. Put the rejection condition in the purchase order while the supplier can still restate the offer.
A worked RFQ line
Use this shape, then replace the brackets with your duty: “AAC Block — State grade, dimensions, standard, exposure, and documents.” That sentence is a template, not a rating of any brand. If a supplier’s datasheet uses different units, convert them onto this sheet so the next offer can be compared.
Where words like automotive grade belong
Searches often add a constraint to AAC Block: automotive grade, or stainless / corrosion. Keep those on this page. Automotive grade is a temperature, vibration, and documentation claim. Ask which AEC or customer spec is actually met, and for which part number. Name the alloy or the coating and the chemical it must survive. Stainless is a family, not a guarantee. If you need a third constraint, add it as another line on the same drawing. A second URL that only swaps the adjective does not give a buyer a second fact.
Related in this section: how to specify Door Frame.
Questions buyers actually ask
What should an RFQ for AAC Block include?
State grade, dimensions, standard, exposure, and documents.
Is a cheaper AAC Block the same part?
Only if standard, exposure, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For AAC Block they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.