AAC and ALC Buyer FAQ: Key Questions to Resolve Before Ordering

Buyers comparing AAC blocks and ALC panels often ask the same practical questions before placing an order: Which product suits the wall application? What information should be included in the inquiry? How should quantities and delivery be discussed? A clear answer to these questions helps contractors, distributors and project teams compare quotations on the same basis.

This guide answers common pre-order questions without replacing approved drawings, local requirements or the advice of the project design team. The objective is to make the commercial and technical discussion more useful before production and shipment are planned.

What is the first question a supplier needs answered?

The first question is usually the intended wall application. Tell the supplier whether the material is for external infill, internal partitions, shafts, parapets or another defined use. Also provide the project country, building type and approximate construction stage. “AAC blocks” or “ALC panels” alone is not enough information for a reliable product discussion because different wall applications may require different dimensions, accessories and installation arrangements.

How should I decide between AAC blocks and ALC panels?

AAC blocks are masonry units installed course by course, while ALC panels are larger reinforced wall elements that normally require planned lifting and fixing. The decision should consider wall layout, opening details, available equipment, installation sequence and the project team’s preferred construction method. A blockwork solution may be more convenient where wall geometry is irregular or where the site is already organised for masonry. Panels may be considered where larger wall elements and a coordinated lifting plan suit the project.

Use the AAC blocks and ALC panels comparison guide as a starting point, then check the choice against the project drawings and the responsible engineer’s requirements.

Which dimensions should be included in an inquiry?

List the required thickness, length and height for each wall type when those dimensions are already specified. If the dimensions are still under review, provide the wall thickness and application and clearly mark the request as preliminary. Do not combine several sizes into one total quantity. Separate external walls, internal partitions, shafts and other wall types so that the supplier can identify the scope of each line item.

If the project documentation includes requirements related to density, compressive strength, fire resistance, thermal performance or acoustics, copy the wording accurately into the inquiry. General phrases such as “best quality” do not provide a measurable basis for comparison.

How do I prepare quantities before requesting a quotation?

Start with a wall schedule or a calculation based on net wall area. Record the length and height of each wall type, deduct major openings and keep irregular areas separate. For AAC blocks, convert the net wall area into units using the face area of the selected block. For ALC panels, provide the panel area or a panel schedule where available.

Keep cutting, handling and wastage allowances separate from the base quantity. The appropriate allowance depends on wall geometry, openings, site handling and installation experience. The AAC quantity planning guide explains how to organise these figures for a clearer request.

Should accessories be included in the same quotation?

Ask the supplier to list accessories separately, even when they are expected to be part of the package. Depending on the wall system and project specification, the discussion may include adhesive, anchors, reinforcement, lintel details, lifting provisions, jointing materials or finishing-related items. A separate list makes exclusions visible and reduces the chance that two suppliers are quoting different scopes.

For blockwork, confirm the proposed jointing method and the information needed for the first course, openings and service penetrations. For panels, clarify fixing details, lifting requirements and installation sequencing with the project team before the order is released.

What site information affects the quotation?

Tell the supplier about practical constraints that may affect packing or delivery. Useful details include the destination city or port, access restrictions, available storage, forklift or crane access, phased delivery requirements and the target installation period. If the site has limited laydown space, a staged shipment may be more practical than one large delivery.

Material should be stored on a firm, level surface and protected from unnecessary impact or standing water. The AAC installation planning checklist covers the site questions that should be reviewed before the first delivery.

Which shipping details should an international buyer provide?

Provide the destination country, city or port, preferred trade term if known, target delivery window and whether the order will be shipped in one phase or several. If you need a packing list, commercial invoice, bill of lading or other agreed documents, mention them before the quotation is finalised. Buyers who are unsure whether to request FOB, CIF, DDP or another term should say so and ask the supplier to explain the responsibilities included in each option.

The export planning guide provides a checklist for packing, documents and delivery coordination.

How can I compare quotations fairly?

Send the same inquiry sheet to every supplier and ask each one to state the product dimensions, quantity basis, packing method, delivery term, validity period and exclusions. Compare the total scope rather than only the headline unit price. A lower price may cover a different size, fewer accessories, a different shipping responsibility or a different packing arrangement.

Keep a written list of unanswered questions. Before placing an order, confirm the final material schedule, quantities, packing, shipping scope and document requirements in writing. The project team should separately confirm that the selected product matches the approved drawings and local requirements.

What should I send with my first message?

• Project country, city and building type
• Wall application for each AAC block or ALC panel item
• Requested dimensions and any specified performance requirements
• Estimated wall area or quantity, marked preliminary when necessary
• Destination port or delivery location and target date
• Site handling, storage, lifting or phased delivery constraints
• Required packing, accessories or commercial documents

Need a structured AAC or ALC quotation discussion? Send Zhongmao Wall Materials your project location, wall application, estimated quantity and delivery target. We can review the information needed for a clear product and commercial proposal.