How to Hire a Glass Installer in the Philippines — Vetting Guide
The Philippine glass industry is saturated with unqualified freelancers cutting corners. Learn the critical engineering questions you must ask before signing a contract.
The 5 Questions to Ask
| Question for Contractor | The Correct Answer You Should Hear |
|---|---|
| "Is the shower enclosure glass fully tempered?" | "Yes, we strictly use 10mm tempered safety glass with the tempering stamp visible on the corner." |
| "What aluminum series are you using for my doors?" | "We are using heavy-duty Series 798 or Series 900 with tandem stainless steel rollers." |
| "What sealant brand do you use?" | "We use Dow Corning structural silicone — not hardware store acrylic caulk." |
| "Can I see an itemized quotation?" | "Yes, every quotation shows aluminum series, glass thickness, hardware grade, and labor separately." |
| "Do you provide a workmanship warranty?" | "Yes, we provide a written after-sales warranty covering water leaks and hardware failure." |
Why These Questions Matter
A contractor who cannot answer these five questions specifically is deliberately vague because their specifications are substandard. The Philippine glass market has very low barriers to entry. Anyone with an aluminum saw can call themselves an installer.
Lump Sum Red Flags
If a quote just says "1 lot sliding window," you are getting the cheapest, thinnest material available. A professional breaks down the extrusion series, glass thickness, and hardware.
The Sealant Trick
Hardware store acrylic caulk costs 80 pesos. Structural silicone costs 400 pesos. The cheap caulk cracks in a year, and you pay thousands in water damage remediation.
The E-E-A-T Standard
We refuse to compromise on safety. We engineer to withstand Category 5 typhoons, adhere to safety glazing codes, and provide transparent itemized quotes.
The Standards
6 Non-Negotiable Requirements
The baseline requirements every legitimate installer in the Philippines must meet.
Certified Tempered Glass
Every safety-glazing application must use certified tempered glass with the stamp visible. No exceptions.
Named Aluminum Series
A professional can immediately tell you the series name and gauge. "Heavy duty" is not a spec. Series 798 at 1.4mm is.
Structural Silicone Sealant
Perimeter joints sealed with structural silicone. Acrylic sealant cracks within 1 year; silicone lasts 15+ years.
Itemized Quotation
Every line item listed separately. A lump-sum quote hides corners being cut.
Written Warranty
Minimum 1-year written warranty covering leaks and hardware. Decline contractors who refuse this.
Post-Installation Water Test
A legitimate installer hose-tests every window before handover. Otherwise, you test it during the first typhoon.
Frequently Asked Questions
Everything you need to know before hiring a glass contractor.
How do I verify if an installer is using real tempered glass?
Ask to see the tempering stamp on the glass corner before installation. Genuine tempered glass must bear an etched mark showing the manufacturer and safety rating. If they refuse, it is likely annealed glass.
What aluminum series should I insist on?
For residential sliding windows, insist on a minimum of Series 798 (1.2mm). For large patio doors or high-wind areas, specify Series 900 (1.6mm+). Reject cheap unbranded extrusions.
Do installers provide a written warranty?
Reputable ones do. Demand a written warranty covering leaks, hardware failure, and installation defects for at least one year before signing a contract.
What are the biggest red flags?
Lump-sum quotations, inability to name the aluminum series, no written warranty, 100% upfront payment demands, and using acrylic caulk for exterior sealing.
Work With a Verified Expert
We answer every technical question in writing. Full itemized quotation, named specifications, and a written warranty on every project.
Explore Related
Installation Process
Browse all our installation guides and resources.
RelatedHow Installation Works
Our 5-step precision process from laser measurement to test.
ChecklistPre-Payment Checklist
What to verify before handing over the final payment.
GuideOFW Remote Quotation
Managing your glass installation from abroad.