Pre-hung Interior Doors

In traditional door installation, a skilled worker can install at most 3 to 4 sets a day - as they need to assemble frames on site, measure positions, drill hinge grooves, install locks and make repeated fine-tuning. When the pre-hung interior door leaves the factory, the door frame and the door leaf are already connected by high-precision hinges, ensuring smooth opening and closing with uniform gaps. On site, only the assembled integral door frame needs to be embedded into the opening and fixed with foam glue or expansion screws. With simple guidance, an ordinary laborer can install 10 to 15 sets in a day. For projects with tight schedules such as the renovation of shopping malls and the batch construction of low-rent housing, the time saved is a real cost.

The biggest pain point in traditional door installation: Poorly skilled workers may install the door crookedly, or the hinge grooves may be cut off, causing the door panel to open by itself or rub against the door frame, which is extremely troublesome for rework later. All the precise processes of the pre-hung interior door are completed on the factory's tooling fixtures - the hinge position is located by numerical control, the lock hole slotting is limited by the mold, and the gap error between the door leaf and the door frame is controlled within 0.5mm. On site, as long as the door opening is vertical and the size matches, even novice installers can achieve a standardized effect. This is particularly important for projects such as chain hotels and public rental housing that require unified delivery standards.

Traditional on-site excavation of hinge grooves and cutting of door frame lengths will generate a large amount of wood dust and shrill noise. This kind of pollution and noise is very troublesome for the renovation of low-rent housing that has already been partially occupied or for night construction during the business hours of shopping malls. Pre-hung interior doors do not require any cutting or chiseling on site (unless the size deviation of the door opening is too large). Just apply glue and tighten screws, and one door can be completed in just a few seconds. It's clean and quiet, and there's no need to move any indoor items.

Many people are worried that pre-hung doors will take up space. In fact, when the pre-hung door leaves the factory, the door leaf and the door frame are packed in a 90° open position. The overall shape is a flat rectangular prism. Each set is independently wrapped with film at the corners and can be stacked for transportation. It does not take up more space than traditional loose doors. Moreover, since the hardware has been pre-installed, the common troubles of losing parts and damaging hinges on site have been avoided. The actual measurement data from our factory shows that the transportation loss rate of pre-hung doors is approximately 70% lower than that of bulk doors.