For replacement of timber door indoors on metal it is necessary to consider several simple rules. In 5-7 years there is shrinkage of bar. For this reason it is necessary to use when mounting semifixed fastening of box in vertical plane.
1. Begin work with dismantling of old door. You can move away her any in the way, convenient for you. It is the best of all to use for this purpose the electric fret saw and the crow bar. The chain saw is in rare instances applied. It is necessary for increase in door opening on width and height.
2. After that before you there has to be clean door opening. It is recommended to focus at the order of metal door attention on the sizes of door opening. In the future you will have no problems with installation. Further it is necessary to compare the door size to the size of door opening. It has to be 4-6 cm more from the left and right side. There will be enough this distance for alignment of door case. Height of aperture has to be 5-6 cm more, than door height. If the sizes it is less, then be engaged in expansion in chain saw.
3. After that you can directly start mounting. At once It should be noted, from below not in all cases it turns out to leave gap. In this situation it is possible to cut through by means of chain saw and mill groove along all threshold on depth of 10 mm. Then polyurethane foam will be added to it from faces through fixing openings. It will fill all this space.
4. Also you can execute installation of door on heater which is impregnated with anti-septic tank. Before installation it is the best of all to degrease outer side of metal box. The fact is that it in most cases has oil surface which does not allow to make strong coupling of polyurethane foam and box.
5. Fix door unit of new door by means of wooden wedges in aperture. You can execute alignment by means of construction level. Fix design by self-tapping screws which diameter has to be more than 6 mm. Extremely it is not recommended to use self-tapping screws from tempered steel. They can burst in the course of mounting. Finally fix door case by dowels. After alignment you can execute hinge plate of door and its adjustment.