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Before installing doors and windows, an error in the opening can compromise blindex and finishing; a technique with a ruler, plumb line, square, and a 1 mm clearance helps to avoid the problem.

Written by Fabio Lucas Carvalho

Published on 04/06/2026 at 17:15

Construction

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Before installing doors and windows, the frame of the opening needs to be plumb, square, and with measurements checked at the top and bottom, a precaution that prevents incorrect gaps, misalignment, difficulty in fitting, and rework during the installation of blindex or other models.

Doors and windows may have installation issues when the opening is not squared with plumb, square, and repeated measurements at the top and bottom before receiving finishing.

The guidance from mason SB Silvano Barros highlights a simple precaution: to start finishing the opening, just one side needs to be plastered. From this side, the internal ruler should be positioned plumb, serving as a reference.

Doors and windows require plumb before finishing

With the internal ruler aligned, the next step is to use the square to define the position of the external ruler. The tool should touch the inside ruler while the other ruler is pulled until it reaches the correct alignment.

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Measurement at the top and bottom prevents error in the opening

When one side is already plumb and square, the opposite side can be marked by the measurement. If the opening is 1.5 meters or 2 meters, the same distance should be repeated at the bottom and top.

After this marking, the ruler is placed again and the frame is ready to receive the plaster. This sequence reduces the difference between the ends and helps maintain the opening regular for doors and windows.

The precaution is important because the subsequent installation of a blindex door or another model depends on this alignment. A crooked opening can make fitting difficult, compromise the finish, and require corrections.

Plaster only enters after checking

With plumb, square, and measurement checked, the plaster can be applied to the opening. Then, the finishing is done on a secure base, with less risk of rework.

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Before installing doors and windows, an error in the opening can compromise blindex and finishing; a technique with a ruler, plumb line, square, and a 1 mm clearance helps to avoid the problem.

Before installing doors and windows, the frame of the opening needs to be plumb, square, and with measurements checked at the top and bottom, a precaution that prevents incorrect gaps, misalignment, difficulty in fitting, and rework during the installation of blindex or other models.

Doors and windows require plumb before finishing

Measurement at the top and bottom prevents error in the opening

Plaster only enters after checking

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Before installing doors and windows, an error in the opening can compromise blindex and finishing; a technique with a ruler, plumb line, square, and a 1 mm clearance helps to avoid the problem.

Before installing doors and windows, the frame of the opening needs to be plumb, square, and with measurements checked at the top and bottom, a precaution that prevents incorrect gaps, misalignment, difficulty in fitting, and rework during the installation of blindex or other models.

Doors and windows require plumb before finishing

Measurement at the top and bottom prevents error in the opening

Plaster only enters after checking

Cambodia has started digging a nearly 180-kilometer canal to connect the Mekong River directly to the sea and reduce its dependence on the ports of neighboring Vietnam.

Four times faster than the Concorde, capable of taking passengers from New York to London in less than an hour at Mach 5.5, and with an engine that switches from turbojet to ramjet mid-flight at Mach 3.5, the Hermeus Quarterhorse went from paper to its first flight in just 19 months.

SpaceX will dock a $843 million vehicle to the International Space Station to push a nearly 420-ton laboratory against the atmosphere and make the debris fall in a controlled manner into the ocean.

China has put millions of electric cars on the roads, but now faces the side effect: more than 1 million tons of batteries are expected to go out of use per year by 2030, while the government expands tracking and combats illegal dismantling with environmental risks.

An Indonesian fisherman pulls a mysterious object from the sea and discovers that it is a Chinese underwater monitoring system, part of the so-called Underwater Great Wall that Beijing uses to track submarines and unmanned vehicles in strategic straits of the region.

The end of Nokia: the brand that was the cellphone of an entire generation has ended its smartphones, left Brazil, and today survives only in basic phones in India while seeking a new partner.

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The most powerful dredger in the world looks like a colossal excavator floating in the sea: Spartacus measures 164 meters, concentrates 44,180 kW of power, cuts hard soil up to 45 meters deep, and uses LNG to redesign ports, canals, and ocean floors.