① It is recommended to purchase the entrance door (security door) in advance before the construction begins.

② The replacement of the entrance door will be done after the carpentry materials have been delivered, and protective measures will be taken to prevent any damage from bumps.

Check the level

Security doors are categorized into four levels: A, B, C, and D, with Level A being the highest. Level A doors can withstand destruction for at least 30 minutes, and note the "A" steel stamp on the door frame.

2. See the filling

The core filling of anti-theft doors includes aluminum honeycomb, water-based foam, honeycomb paper, and rock wool (mainly used in industries such as fire-resistant doors). For residential anti-theft doors, aluminum honeycomb filling is a good choice due to its superior soundproofing, heat insulation, and moisture-proof properties.

3. Door Panel Material

Cast aluminum, copper, zinc alloy steel plates, galvanized steel plates, and cold-rolled steel are available. Cast aluminum and copper doors are more expensive and are commonly used in villas for their grandeur. For residential use, zinc alloy steel plates can be chosen, with a plate thickness of no less than 2mm and door thickness of no less than 90mm.

4. Gate Lock

A, B, C three levels, with C being the highest. The ideal combination is the C-grade lock with a door of grade A. The C-grade lock offers a minimum anti-theft time of 30 minutes, a minimum of 12 locking points on the door, and the main bolt projection is not less than 16mm.

5. View Installation

Each side of the door frame and wall joint must have no fewer than three anchoring points. Do not use foam adhesive for the concrete mortar灌注 inside the door frame.

6. Focus on After-Sales

Be sure to ask about the warranty period before placing an order, whether it's covered under repair (free) or warranty (charged).

Do not pay the full amount upfront; wait until the installation is completed and inspected before making the final payment.