Specification Checklist

Stone coated metal roofing shingles: fields to confirm

Name the substrate, installed exposure and finish before approving an alternative.

A textured surface can hide important differences in the roof package. Use the questions below to keep the material specification and commercial scope together. Leave unknown values open for supplier confirmation instead of inferring them from a sample photograph.

Send the specification brief

Keep the fields distinct

The specification record

These are request fields, not universal product specifications. The supplier must name the offered construction and document each value. Review the inquiry options alongside your project drawings.

01 · Piece size and net installed exposure

Record overall length and width in mm or inches, then installed exposure or net coverage per piece. Keep the unit consistent through the piece, pack and area calculation. A square-foot area and an m² area cannot be compared without an explicit conversion.

02 · Metal substrate and minimum thickness

Identify steel or another specified metal and request minimum base-metal thickness separately from the coating and granule layer. Record gauge alongside the stated thickness unit and tolerance. A total coated measurement should not silently replace a minimum base-metal requirement.

03 · Coating, granules and finish reference

Request metallic coating designation, protective finish description and stone granule color reference. Ask how the proposed lot will be compared with the approved sample. A similar color name does not establish the same material construction, exposure limits or service terms.

04 · Interlock and accessory interface

Ask for a profile drawing and compatible ridge, hip, valley, edge and fastening components. Mark any proposed substitute. Count accessory quantities separately from field coverage so an omitted trim package does not appear to be a lower complete-roof price.

Questions for a purchase decision

Appearance and evidence

What does a sample establish?

Use an identified sample to review profile, texture and color under an agreed viewing condition. Tie the approval to a named item and finish. A sample does not replace product-specific testing, a roof assembly review or a supplier warranty statement.

Can a sheet-panel reference support shingle approval?

It can help identify questions about thickness and coating units. It cannot verify a shingle interlock or transfer a wind or fire classification to a different assembly. Request reports identifying the exact offered product and installation conditions.

Budget and acceptance

How should a budget alternative be reviewed?

Hold the minimum construction and project requirements fixed, then compare finish, accessory scope, packing, freight and service separately. High-end, mid-range and budget are buying preferences, not verified supplier grades. Reject an undocumented deviation even if the unit quote is lower.

What is the release checkpoint?

Compare the supplier drawing, sample reference and document list against the RFQ revision. Record remaining exceptions and who must approve them before placing an order. MOQ, sample charges, lead time and destination charges require written confirmation.

Read the procurement brief for a document request sequence. The public product-family reference informed question fields only; it is not evidence that an offered shingle is approved.

Send your checklist with open fields marked

State the product, size, thickness, finish, quantity, destination and requested timing. We can clarify missing fields while preparing supplier questions.

  • Name the roof application and drawing revision.
  • Keep net coverage distinct from overall dimensions.
  • Identify sample and report requirements.