Double Glazing Specified Correctly at Construction Stage
Getting Glazing Into the Plans Before the Frame Goes Up
When glazing is specified at plan stage, every window and door performs the way the building was designed to perform. Penot works with builders, project managers and certifiers to get double glazing locked into the construction documents before the slab is poured, not retrofitted around a frame that was already fixed. We supply technical specifications, product data for energy compliance submissions, and site-stage support from frame-in through to handover. Homeowners looking for double glazing in a new build can find the homeowner-facing new-builds guide here.
Why Specify Penot at Plan Stage
Getting glazing onto the drawings early removes the three problems that derail new-build glazing: frame openings cut to the wrong tolerances, energy compliance sections that have to be reworked at certification, and last-minute product substitutions when the original spec cannot be sourced. We engage at design development, provide dimensioned drawings for window and door openings, and hold those specs through to delivery. As one of Perth’s specialist double glazing Perth suppliers, we work across the full construction cycle, not just at the point of installation.
We provide opening dimensions, sill and head details, and glass-type recommendations at design development stage, so the structural drawings are built around the glazing, not the other way around.
We supply U-values, SHGC figures and product data sheets formatted for NatHERS and Section J compliance submissions, so the certifier has what they need without a separate procurement exercise.
Where the project is near a road, rail corridor or flight path, we provide STC and Rw ratings for the relevant glazing assemblies, ready to attach to the acoustic report.
For sites with a bushfire attack level designation, we supply BAL-29 rated double glazed windows and doors, with the product testing documentation needed for building permit sign-off.
Project Types We Work Across
Penot has supplied double glazed windows and doors into new-build projects across Perth, from single-home custom builds to grouped housing developments. We know how glazing fits into a Perth build sequence: frame-in, lintel setting, weatherproofing, then glazing installation before internal linings go on. Getting ahead of that sequence means no site delays waiting on product, and no rework because the opening was framed short. If you are working with an architect or designer on the glazing spec, see our architects and designers page. If you manage multiple-dwelling projects, the builders and developers page covers volume procurement and compliance documentation.
Climate-Matched Glazing Specification for Perth
Perth’s climate puts specific demands on new-build glazing. East and west-facing openings need solar-control glass to manage heat load across summer. North-facing glass needs to be specified for passive solar gain in winter without overheating the living areas. Acoustic laminated glass becomes relevant on anything near Mitchell Freeway, the Joondalup rail line or the flight paths over the southern suburbs. We work through the orientation of each elevation at specification stage so the glass type is matched to the exposure, not applied uniformly across the whole job.
Low-e solar-control glass specified on west and east-facing openings cuts the afternoon heat load before it enters the building, reducing the cooling demand the HVAC system has to meet.
North-facing glass specified with the right SHGC captures winter sun for passive heating while thermally broken frames stop the cold edge effect that makes rooms feel damp regardless of the air temperature.
Laminated acoustic glass in double glazed units lifts the STC rating enough to make a material difference on sites near busy roads or train lines, without changing the external appearance of the glazing.
BAL-29 rated double glazed windows and doors meet the construction requirements for bushfire-designated sites and carry the product testing documentation certifiers require.
Thermally broken aluminium frames stop the conductive heat transfer through the frame section that undermines the performance of the glazing unit. They are the right call on any new build targeting a 6-star or better NatHERS rating.
We provide head, sill and jamb flashing details at specification stage so the builder's frame-in and weatherproofing work is coordinated with the glazing installation, not corrected around it.
On-Site Coordination Across the Build Sequence
We coordinate directly with the site manager or construction supervisor at the critical stages: frame-in check before openings are locked in, pre-order confirmation once the frame is set, delivery sequencing to match the build programme, and final installation when the building is weatherproofed. Our team does not need to be managed around a build; we fit into the programme.
Explore Window and Door Options for New Builds
