Liaoning Thermal Insulation Window Installation Acceptance Standards: 7 Key Nodes Must Read Manual

In the extremely cold weather of minus 30 ℃ in Liaoning, the installation quality of insulated windows directly determines 70% of the energy-saving effect! Many homeowners have found that even if they purchase high-quality windows at a high price, installation errors can lead to continuous cold ventilation, air leakage, and condensation. This article summarizes 7 life and death critical acceptance nodes based on the "Technical Specification for Building Energy saving Doors and Windows Engineering in Liaoning Province" (DB21/T 2973-2018), combined with actual test cases by the quality inspection department, and teaches you step by step to guard the last centimeter of defense line.

1、 Life and death line 1: Acceptance criteria for verticality and levelness of window frames

Window frame verticality deviation ≤ 2mm/meter (measured with a 2-meter ruler)

Diagonal length difference ≤ 3mm (measured diagonally with a tape measure)

Liaoning specific risks

A real case of a residential area in Shenyang where the window frame was tilted 5mm, resulting in sealant cracking and excessive air leakage

Self checking tool

Infrared level and feeler gauge, with a focus on detecting the four corners of the window

2、 Lifeline 2: Mandatory specification for foam filling density

Foam adhesive needs to be continuously and fully filled, and after curing, the cut surface should be free of voids

Liaoning specific requirement: Use -40 ℃ low-temperature resistant polyurethane foam adhesive

A painful lesson from blood and tears

Due to insufficient foam filling, the Dalian property owner's window frame froze, expanded, and deformed two years later

detection method

Visual inspection: The width of the colloidal overflow on the outside should be greater than 10mm

Tool cutting: Randomly cut 3 sections for inspection

3、 Line of defense 3: Technical parameters of sealant construction quality

Adhesive seam width 5-8mm, thickness ≥ 4mm

Silicone weather resistant adhesive must be used (recommended Dow Corning DC795)

Liaoning Extreme Test

-Comparison of hardening and cracking speed of inferior rubber strips under 30 ℃ environment in the table:

Cracking time of adhesive type

Acceptance Techniques

Use an art knife to cut open the colloidal section and check if it is fully adhered inside and outside

4、 Lifeline 4: Mandatory configuration of concealed drainage system works

Drainage holes need to be designed with windproof covers (to prevent backflow)

The slope of the outer window sill is ≥ 5%, and the drip line is complete

Actual measurement of rainstorm in Liaoning

A certain project in Yingkou did not have a drainage slope, resulting in the formation of an ice dam in winter that caused the window frames to freeze and crack

testing tool

Laser level measuring slope, mineral water simulation pouring test

5、 Core 5: Operating standards for systematic debugging of hardware components

Handle opening and closing force ≤ 20N

When multiple points are locked, the overlap between the lock point and the lock seat is ≥ 3mm

Liaoning Wind Pressure Test

Coastal residential buildings in Dalian must pass a 9-level wind pressure resistance test (with at least 6 locking points)

Self checking method

A4 paper clamp test: unable to pull the paper in the closed state

6、 Bottom line 6: Mandatory specification for fatal details in glass installation

Glass cushion blocks should be made of PVC material with a hardness of 80-90

The gap between glass and profiles needs to be filled with elastic sealant

Extreme cases

The owner of Fushun caused the glass to self destruct at -30 ℃ due to the lack of cushion blocks

Acceptance tool

Gently tap the rubber hammer to detect hollowing, and measure the gap with a vernier caliper

7、 Final Inspection 7: Liaoning Special Standard for Ultimate Test of Whole Window Airtightness

Handheld wind pressure tester test: When the pressure difference is 100Pa, the air leakage rate is ≤ 1.5m ³/(m · h)

Infrared thermal imaging scanning: temperature difference between window frame and wall ≤ 3 ℃