Sliding vs Folding vs Lift-and-Slide Doors | Fabricasto
October 09, 2026
What Should Architects Check Before Finalising Aluminium Door & Window Drawings?
An aluminium door or window drawing can look complete and still leave important questions unresolved. The opening may be dimensioned and the profile selected, yet floor levels, drainage, glass weight or fixing access can still create problems in fabrication. For architects, this is why the drawing stage matters. Good aluminium window design for architects is not only about proportion and sightlines. It should also give the fabricator and site team enough information to build the opening without making avoidable decisions later. This piece talks about this checklist in detail.
What Should Be Confirmed in the Door and Window Schedule Before Drawings Are Frozen?
Always start with the schedule because it becomes the reference point for elevations, shop drawings, BOQs, and procurement. Every opening should have a unique mark, room location, width, height, opening type, sill level, finish and glass reference.
The opening direction also needs to be clear. A casement may clash with a curtain or railing, while a sliding door may need more track depth than the floor build-up allows. CPWD’s Door and Window Manual uses designated marks on elevations, reinforcing the need for one consistent identification system.
How Should Architects Select the Right Aluminium System for Each Opening?
One profile series should not be stretched across every opening simply to keep the specification simple. A bedroom casement, a garden slider and a double-height fixed panel have different loads, hardware and sealing needs.
Make sure to check supported sash sizes, glass weights, drainage, locking options and available configurations before fixing mullion locations. BIS IS 1948:2024 covers aluminium-framed doors, windows and sliders, while IS 18648:2024 sets classification and performance requirements for doors, windows and sliders.
At Fabricasto, we partner with a system family such as AluK where sliding, casement and façade solutions can follow one technical approach, but each opening still needs the correct series for its size and exposure. AluK India itself positions its ranges around sliding doors, casement windows, curtain walling and related aluminium systems for the Indian market.
What Structural Openings, Tolerances and Sill Details Need to Be Checked?
Drawings should distinguish between the structural opening and the finished opening. Plaster, stone, cladding, waterproofing and packers all take up space, and ignoring those layers can leave too little room for installation or create oversized sealant joints.
Large sliding doors need particular care at the sill. Internal and external finish levels, track depth, waterproofing, drainage and any required step should be coordinated before screed and finishes are fixed. A flush-looking threshold without a proper drainage route can create problems during heavy rain.
At Fabricasto, we review these junctions while floor build-ups can still change, so the threshold, drainage path and frame support are resolved together rather than corrected on site.
What Glass and Performance Information Should Be Included?
Do not leave glass as a generic note saying “toughened glass” or “DGU”. The drawing and specification should establish thickness, safety requirement, coating or performance target, cavity where relevant and whether the glass is laminated, toughened or insulated.
Panel size matters because glass weight affects rollers, hinges and frame limits. Orientation matters too. For larger openings, define wind, air leakage, water penetration and acoustic requirements before approval.
How Should Hardware, Opening Direction and Daily Use Be Coordinated?
Hardware affects more than the handle shown on an elevation. Hinges, rollers, multipoint locks, restrictors, and concealed mechanisms need clearance, fixing zones, and service access.
You need to check whether an open shutter blocks a passage, hits a wall or conflicts with a mosquito mesh. For large sliders, make sure to confirm handle and locking access. Where child safety or controlled opening limits are needed, identify them before hardware is ordered.
The same applies to doors that sit close to furniture, curtains or interior joinery. A technically correct opening can still be awkward to use if the drawing does not reflect what sits immediately around it.
What Should Architects Check Before Issuing Drawings for Construction?
Before issue, make sure the drawing set, schedule, specification and BOQ describe the same system. Finish codes, glass references, and hardware descriptions should use consistent terminology, and revisions need clear dates so production doesn’t proceed from an outdated drawing.
A final coordination review should confirm:
- Opening size: Structural and finished dimensions agree.
- Levels: Sills, tracks and floor build-ups are coordinated.
- Glass: Build-up and performance are defined.
- Hardware: Operation and access are practical.
- Interfaces: Waterproofing, finishes and fixings are resolved.
This review is also the right time to confirm which dimensions remain site-dependent and which ones are already frozen for fabrication.
Conclusion
Finalising aluminium door and window drawings is less about adding more detail and more about resolving the right detail. Profiles, glass, hardware, loads, floor levels, drainage and surrounding finishes all affect one another, and the drawings should make those relationships clear before fabrication starts.
We, at Fabricasto, use this stage to test design intent against fabrication and site reality. When an engineered system such as AluK is part of the brief, early coordination also helps preserve the intended sightlines and performance without forcing late changes around completed work. A well-resolved drawing leaves fewer assumptions.
FAQs
What should an architect include in an aluminium window drawing?
Include the opening mark, dimensions, sill level, frame and panel configuration, opening direction, glass reference, finish, hardware and key perimeter junctions. Where needed, show drainage, anchors and interfaces with stone, plaster or cladding. The drawing should align with the schedule and specification so the fabricator is not left interpreting gaps.
When should aluminium window shop drawings be reviewed?
Review shop drawings after the architectural intent and broad system are approved but before fabrication begins. By then, structural openings, finished floor levels, and adjacent finishes should be sufficiently developed. If major dimensions are still moving, record them as pending rather than approving a drawing that will need silent changes during production or installation.
How much tolerance should architects allow around aluminium frames?
There is no universal perimeter allowance for every system or substrate. The required space depends on frame size, anchor method, opening accuracy, packers, sealant and surrounding finish. Architects should coordinate the intended tolerance with the fabricator and site team, then show the frame position and finished opening clearly instead of leaving the gap undefined.
Why are sill and drainage details important for aluminium sliding doors?
Sliding systems depend on track and drainage geometry at the lowest part of the opening. If external water has no clear route away, it can collect near the sill during rain. The architect should coordinate track depth, waterproofing, external falls, drainage channels and finished levels before floor construction is complete.
What glass information should architects give the fabricator?
State the glass build-up or required performance clearly, including thickness, safety type, coating or solar-control requirement and insulated cavity where applicable. The final choice must also suit panel size, frame capacity and hardware. Writing only “toughened glass” leaves too many decisions unresolved, particularly for large panels or exposed façades on site.
Should architects specify the exact aluminium profile series?
Yes, when the selected system forms part of the approved design and performance strategy. The series affects sightlines, supported sizes, drainage, hardware and testing. If the project remains performance-specified, drawings should still establish the required configuration and criteria so proposed alternatives can be reviewed properly rather than substituted on price alone.
How should architects coordinate aluminium windows with stone and interior finishes?
Show where the aluminium frame sits relative to the structural opening and finished surface. Stone thickness, plaster, cladding, curtain pockets, and joinery can change the visible reveal or restrict access for fixing. Reviewing these junctions before shop drawing approval prevents cover strips, oversized sealant joints and last-minute cutting around an installed frame.
What performance data should architects request for large aluminium openings?
Ask for relevant information on supported panel sizes, glass weights, wind resistance, water penetration, air permeability and hardware capacity. Acoustic or thermal data may also matter depending on the project. The evidence should match the actual configuration because a test result for one size or arrangement may not represent every proposed opening.
Who should approve aluminium door and window shop drawings?
The architect reviews design intent, dimensions and interfaces, while the structural or façade consultant may check loads, anchors or performance criteria. The fabricator remains responsible for system-specific fabrication information within its scope. Clear approval responsibilities matter because architectural approval does not replace specialist engineering responsibility or the fabricator’s own technical checks.
When should Fabricasto join the aluminium window design process?
Fabricasto is most useful during design development, before structural openings, floor levels and façade junctions are fully frozen. At that stage, panel sizes, system limits, glass, drainage, hardware and installation access can still be coordinated with the architect. Early discussion reduces compromises that otherwise appear during shop drawing review or site installation.
