What to Review Before Approving Window Shop Drawings

Quick answer: Before approving shop drawings, verify every unit mark, frame size, opening direction, panel layout, sill, glass build-up, finish, hardware, screen, mullion and interface with structure and waterproofing. Confirm that final field dimensions—not preliminary plans—govern production, then approve one dated revision as the controlled set.

Shop drawings translate design intent into manufacturing information. Approval is not a formality: it is the point at which the project team confirms that the product being fabricated matches the opening, architecture and commercial order.

Confirm document identity first

Check project name, address, drawing number, revision, issue date and referenced quotation. Verify that the unit schedule and elevations use the same marks as the architectural set. Old files should be clearly superseded so no one manufactures from an email attachment that is no longer current.

Review every size and reference condition

Distinguish rough opening, frame dimension, daylight opening and nominal size. Confirm units and rounding conventions. Compare shop dimensions with final field records, including finished floors, sill pans, bucks, receptors and adjacent finishes. Similar-looking openings should not be assumed identical.

Check operation from the correct viewpoint

Define whether elevations are viewed from exterior or interior. Check handing, hinge or pivot side, sliding direction, folding stack, active leaf, handle location and egress intent. Verify that panels do not conflict with walls, furniture, railings, cabinets, fixtures or one another.

Verify frame, mullion and sightline layout

Review frame series, depth, mullions, transoms, meeting stiles and structural couplers. Confirm alignment across adjacent units and elevations. Large combinations may require reinforced members or independent building structure; responsibility should be clearly assigned.

Review glass as a full build-up

Confirm pane thickness, safety treatment, lamination, low-e coating, coating surface, tint, gas fill, spacer, pattern and privacy requirements. Identify spandrel or opaque areas. Ensure performance documentation applies to the proposed configuration and that local professionals have reviewed safety and code requirements.

Check sills, thresholds and drainage

Review sill height, track count, drainage routes, weeps, sub-sill or pan, interior and exterior floor elevations and transitions. A flush visual intent must be coordinated with water management, accessibility and exposure. Never block drainage with sealant, finishes or field shims.

Confirm hardware, screens and accessories

List handles, locks, cylinders, restrictors, closers, stays, rollers, hinges, pulls, screens and loose accessories. Confirm finish, quantity, keying and which components ship separately. Review power, controls and access requirements for any automated system.

Coordinate installation interfaces

Shop drawings should show anchorage zones, perimeter clearance and typical interfaces, but the project team must coordinate substrate, structure, flashing, membranes, insulation, sealants, shims, interior finish and exterior cladding. Identify who designs each transition and who verifies concealed conditions.

Run a final approval meeting

• Architect or designer: appearance, alignment and design intent
• Contractor: dimensions, sequence, access and constructability
• Engineer where required: structure, supports and movement
• Envelope professional where required: water, air and flashing integration
• Owner: finish, operation and accepted commercial scope
• Manufacturer: manufacturability and documented product configuration

Record comments in one coordinated markup. After revisions, check that each comment was resolved rather than assuming a new issue corrected everything.

Frequently asked questions

Does shop-drawing approval transfer design responsibility?

No. Responsibilities remain governed by the project contracts and applicable law. Approval confirms coordination within each party’s scope.

Can production start from marked-up drawings?

It is safer to issue a clean final revision incorporating accepted changes and explicitly release that set.

Who verifies dimensions?

The qualified local team should verify actual field conditions; the manufacturer coordinates the resulting unit sizes in the drawings.

Review before formal order

MERUZY provides project-specific drawing coordination before production. See how approvals fit into the process or submit plans for a free design and quotation.

This checklist is general coordination guidance and does not replace project contracts, approved details, engineering or local professional review.