Home Improvement

Ventilation of the house

ventilation of the whole building house building company บริษัทรับสร้างบ้าน will install the moisture proof sheet without a seam Will make the air inside the building unable to flow out to the outside, so it is necessary to provide a ventilation system based on the movement of hot air. to create air circulation and removes moisture, odor and pollution

  • Motor driven propellers to suck exhaust air and odors out of the building. and then drained out through the louver vents of the attic floor.
  • without motor (Using the principle of air movement) or may be motorized. to help ventilate the attic

ventilation of the roof and attic

  • Internal ventilation under the roofing sheet. This can be done by having an air channel close to and parallel to the eaves. or a chimney for ventilation on the roof ridge There should be at least 1/300 of the area to be vented and every distance at least 50% of the desired area along the roof ridge. As well as vents or vents should be protected from rain and insects.
  • Vents at the eaves or eaves should be elongated openings on the eaves of a continuous length. Or it is a hole punched in several circles with a net inside to prevent insects.
  • Ventilation on the roof ridge. Use the longitudinal chimney on the roof ridge. Or maybe make a louver on the gable wall of the attic.

Ventilation in the basement of the building

  • Openings should be at least 1¼ ft² (0.14 m²) for every 25 ft (7,620) length along the basement wall. and there should be at least one opening per wall, as close to the floor above the basement floor as possible. And try to stay close to the corner by wearing a protective mesh netting. Reptiles and insects such as snakes and rodents enter
  • Polyethylene waterproofing sheet.

Joints for movement

building materials Or building a house รับสร้างบ้าน such as concrete will expand and contract when the temperature changes during the day and night. The warpage is caused by this expansion and contraction until it becomes deformed. or damaged There should be an expansion joint for the building in the appropriate position. by separating the building parts that are connected to each other completely so that each part can move or expand independently It still prevents water and air from infiltrating the building.

Types of joints for movement

  • Expansion joints It is characterized as a leg gap with a section of the groove on one side and a section of the end inserted into the groove on the other side, as if bolted into each other between the building’s parts. To provide space for the parts to expand together and shrink apart in the specified line – back and forth.
  • The fracture joint has a continuous length. It is a deep groove in the material as specified, it does not cut off, causing a weak point in the material plane. And to control cracks at various points when stress and shrinkage of the material occur.
  • Seams for separation. It looks like a space that is separated from each other. The longer the days, the more separated or collapsed more and more apart The objective is to make the two parts of the building that may collapse or move unequally. without pulling the other part of the building to follow as well

The width of the expansion joint They range in size from ¼” (6) to 1″ (25) or more, depending on the type of material. and the amount of temperature change In the positioning design, special consideration should be given to the following factors:

  • Area expansion coefficient will be approximately twice the longitudinal coefficient.
  • Volume expansion coefficient will be approximately three times the longitudinal coefficient.

Location of joints for movement

  • The connection point between the new building and the existing building.
  • Areas of continuous length without expansion joints.
  • Steel concrete roof -200′ (60 m)
  • Masonry wall -125′ (38 m)
  • Areas exposed to strong sunlight must have expansion joints and more frequent cracking joints. due to high temperature changes
  • The wall of the fall protection panel must allow the cracking joint and the expansion joint near the corner. in order to prevent the pressure from each other of the bi-directional walls when expanding
  • A piece of air or an elongated building body, such as a front eaves, side ridges, and rock-fall roofs. and the wall frame They all need expansion joints as well.
  • There should be a joint at the connection point between the low building and the high building. and around the corner of the building that is shaped like an L or a T, etc.

Expansion joints around the roof to the wall

  • Provide drainage holes for spaced walls.
  • Sealing plate fixing plate.
  • Sealing plate on
  • Use a slotted extender or a release plate.
  • Sheet filling material.
  • waterproof sheet

Expansion joint details are shown here. Even with different details But there will be at least two things in common:

  • Must be a joint that is completely separate from each other. And between the joints must be filled or sealed with flexible material.
  • There is a waterproof and weather sealant. This may be in the form of a flexible filling material. Waterproof sheet is embedded in the structure or is a waterproof rubber covering on a flat roof.

load-bearing foundation wall

  • Wood edge
  • Solid rubber sheet covered with metal.
  • Floor seals.
  • At least 8″ tall (205)
  • Flexible insulation.
  • Single layer roof topcoat.
  • Sponge sticks and sealing materials.


  • Sealing material.
  • waterproof sheet
  • waterproofing sheet

wall and pillar

  • Sealing material.
  • Wall mountable metal plate.
  • Support rods and sealing materials

expansion joint cover

  • falcon-style anchor bolt
  • Support rods and sealing materials

Expansion joints for flat roofs

  • Steel brackets attached to the wall.
  • Sliding joints.
  • Fixing plate NS
  • Sealing material.
  • Sliding joints.
  • Sheet joint filling material.

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