Replacing the sliding doors in your unit at 1212 N. Lake Shore Drive?

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Ask about your doors

Answers come straight from this building's own completed jobs and the manufacturer's test data. Anything we cannot answer here goes to an estimator with your request.

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Compliance information

What the codes and the building ask for, and what we are proposing. This page is informational — the binding version is the written estimate and the permit set our own drafters prepare.

Every rating, in one table

Cook County is climate zone 5A. Sound carries no code requirement at all in a residence — it is here because it is the question people actually ask.

Measure	Requirement	Your doors	Source
U-factor, operable	≤ 0.45	0.38  Exceeds	Guardian / Arcadia
Solar heat gain (SHGC)	commonly ≤ 0.40	0.22  Exceeds	Guardian / Arcadia
Visible light	no limit	0.49	Guardian / Arcadia
Safety glazing	tempered or laminated	Tempered  Meets	as supplied
Sound, standard glass	none	STC 33 · OITC 26	ASTM E90
Sound, with acoustic laminated glass	none	STC 37 · OITC 31  +4 STC	ASTM E90

Where the sound figures come from

A laboratory test of this door — ASTM E90, Architectural Testing, Inc., report C3515.01-113-11, on an Arcadia ULT 5000 T/B sliding glass door carrying the same 4¾″ thermally broken aluminum frame we quote. Two glazings were tested: the 1″ insulating unit that is our standard (3/16″ tempered, 5/8″ air, 3/16″ tempered) at STC 33 / OITC 26, and one with a laminated inner lite at STC 37 / OITC 31.

E90 rates the whole assembly — frame and glass together, installed in a test opening. That matters when comparing quotes: a glass-only figure says nothing about what comes through the frame, and the two are not interchangeable. The laboratory's own wording travels with the numbers rather than being paraphrased: the report relates only to the specimen tested and is not a certification of the product. We will send it to you in full on request.

Why this glass and not the cheaper coating

Arcadia's other low-E for these doors carries no NFRC number at all — it is reported as “Not Rated” on every one of the thirteen units in this building ordered with it. It is a perfectly good unit, and for a like-for-like replacement reviewed as an alteration it is normally accepted. But it leaves the thermal questions — from your board, from a City reviewer, from a rebate program — unanswerable. So the price on this page is the rated package as standard. Our own order for unit 30BS in this building was built with it. We will not quote you a number we cannot document.

Safety glazing

Glass in a door is a hazardous location under the building code, so it must be tempered or laminated and must carry a permanent manufacturer mark. Every panel we supply is tempered and permanently marked — on all sixteen units we have ordered for this building, without exception. Acoustic laminated glass, if you add it, satisfies the same requirement by a different route.

Building and association requirements

• Bronze tint is not a style choice. The association requires every replacement to match the existing glass so the elevation reads uniformly from the street. We glaze to that standard by default.
• Dark Bronze AB7 anodized frames — the finish already installed throughout the building.
• Board or management approval before work starts. We prepare the submittal package; you or your property manager files it.
• Certificate of insurance naming the association, and compliance with the building's rules on freight elevator booking, protection of common areas, and working hours.

Permits and drawings

• City of Chicago permit — filed by Savocchi. Our permit drawings are prepared in-house, which is why the estimate carries an architectural service line rather than an outside consultant's fee.
• Shop drawings are issued for your approval before anything is fabricated. The 12–15 week lead time starts from that approval, not from the order.
• Licensed and insured glazing contractor; the work is performed by our own crews, not subcontracted.

What is confirmed after this page

Every instant estimate is reviewed by an estimator within one business day, and final sizes come from a physical field measurement — never from a number typed on a web page. Anything above that turns out to differ for your unit is raised with you in writing before it is ordered.