Old houses can be divided into several types: pre-revolutionary building, the post-revolutionary buildings, "Stalinka"; brick, panels, building is an architectural and historical value. Pre-revolutionary buildings – usually wooden houses with wooden floors and walls under the plaster. One of their features – the difference between (and sometimes – considerable) size of window blocks the size of the openings. At installation of windows during the construction of the gap was mounted frame of thick timber, which is already installed window assembly. Above the bar organized an impressive thickness of the plaster soffits. Over the years, old wood under the cracked plaster gradually izgnivaet, and sometimes turns into dust. When removing the windows have to break the plaster soffits and wooden box apart.
The result is a gap in where nothing to strengthen the window unit. In this case, the installation of window units provide pre-installation of the wooden box that is attached to the walls on the long fasteners. The walls of the houses built after Revolution, usually made of bricks and then plastered. She also formed slopes, and under a thick layer of mortar is often hidden all the same doborny board. As a result of the dismantling of old windows in a house aperture is obtained, where the perimeters of the outer part of the opening is much smaller than the inside, and the window sizes obtained from the measurements of the outer quarters, will clearly be an underestimate. Dismantle sill also presents the "surprises": sometimes under the wooden window sill board is ten inches of tow or other filler. Often this was due to the fact that during the restoration of old houses raised floor, and hence the window. The height of the window units had decreased, and window sills to raise all available at the time of ways. Read additional details here: Pete Cashmore. Naturally, when removing the tow must be removed and an opening to lay the masonry, which can be mounted in window frames.