What should I pay attention to in the construction process of external wall insulation? What about c

First of all, it is important to pay attention to the tightness between the layers.

Exterior wall insulation construction technology:

1. Elastic control line: According to the technical requirements of building façade design and external wall external thermal insulation, the horizontal and vertical control lines of external doors and windows, telescopic lines, decorative seams, etc. are popped up on the wall.

2. Hang the reference line: hang the vertical reference steel line at the big corner (yin and yang angle) of the external wall of the building and other necessary places, and hang the horizontal line at the appropriate position on each floor to control the verticality and flatness of the polystyrene board.

3. Preparation of special adhesives:

According to the mixing ratio provided in the instruction manual of the special adhesive, the special person is responsible, strict measurement, mechanical stirring, to ensure uniform mixing.

The mixed adhesive can be used only after standing for 5min and then stirring.

The adhesive must be used with mixing, and the mixed adhesive should be used up within 1 hour.

4. Pre-adhesive and repackage mesh cloth: all exposed places on the side of the polystyrene board (such as expansion joints, door and window openings) should be repackaged with mesh cloth.

5. Paste polystyrene board:

The standard size of polystyrene board for external insulation is 600mm 900mm and 600mm 1200mm, and non-standard size or local irregularities can be cut on site, but it must be noted that the incision is perpendicular to the board surface.

The yin and yang corners must be staggered and pasted with each other.

There should be no straight seams at the four corners of the door and window openings, and the whole polystyrene board must be cut out of a knife handle, and the width of the small side is 200mm.

The sticking method adopts the point bonding method, and the bonding area must not be less than 30%.

After the polystyrene board is wiped with a special adhesive, it must be quickly pasted to the wall to avoid the adhesive crusting and losing its adhesion.

When pasting the polystyrene board, the polystyrene board should be gently and evenly squeezed, and the flatness and verticality of the board surface should be checked with a 2m ruler and a drag line board. When pasting, pay attention to remove the adhesive that spills from the edge of the board, so that there is no seam between the board.

Attention should be paid to safety during construction:

Workers must wear safety helmets, wear safety belts when working at height, and put tools and spare parts in tool bags.

Wear non-slip shoes, and tighten the cuffs and trousers when working.

After the construction is completed, the scraps will be collected together and placed in the garbage shed to avoid foam flying all over the sky and causing white pollution.

Polystyrene board storage should have fire prevention measures.

It is strictly forbidden to carry out electrical welding construction near the polystyrene board.

In case of strong winds above level 6, stop the operation.

External thermal insulation refers to the thermal insulation measures on the surface of the external wall of a building to reduce energy loss and improve energy efficiency. Here are six key points to keep in mind when carrying out external insulation construction, so that even small workers can easily attach insulation boards.

1.Careful inspection and preparation before construction: Before carrying out external insulation construction, it is necessary to carefully check the flatness, strength and whether there are water leakage problems in the walls of the building. If there is a problem, it is necessary to deal with it in advance to ensure that the foundation of the construction is good.

2.Choose the right insulation: Choosing the right insulation is very important.

We should choose the right insulation according to the characteristics of the building, the environmental conditions and the budget. At the same time, the selected insulation materials require the products to meet the relevant national standards, and have low thermal conductivity and good durability.

3.Ensure the firm pasting of the insulation board: When pasting the insulation board, make sure that the surface of the wall is dry, clean and flat. Use a good quality adhesive and the right tools to stick the insulation board firmly to the wall, making sure it is flush and fits snugly.

4.Pay attention to the splicing and processing of the insulation board: the insulation board needs to pay attention to its splicing and processing during the construction process.

The correct method should be taken to splice the insulation boards together, and at the same time ensure that the splicing parts are dense and seamless. For special parts such as windows and doors, appropriate treatment should be carried out as needed to ensure that the insulation effect is effective.

5.Pay attention to the handling of holes and punching positions: During the construction process, you may encounter situations that need to be punched or holes opened, which require special attention.

Before punching, it is necessary to carry out reasonable planning and positioning to ensure that the wall structure is not damaged. After punching, it is necessary to seal it in time to prevent water leakage and affect the insulation effect.

6.Do a good job of waterproof and fire prevention measures: After the construction of external thermal insulation, waterproof and fire prevention measures should also be considered. Strengthen the waterproofing treatment of external walls, choose appropriate fireproof coatings or additives, and improve the fire performance of the walls. This ensures the safety and longevity of the building.

In short, whether it is a large worker or a small worker, the above six points should be paid attention to when carrying out external insulation construction. Only by doing a good job in the handling of various details can we ensure the insulation effect and construction quality.

1. Before the construction of external wall insulation, a special construction plan should be prepared, and Qinglu and Gaoqing can only be constructed after the approval of relevant personnel;

2. All kinds of exterior wall insulation materials and accessories must be inspected and retested before they can be used in the project, and the certificates and inspection reports of various materials should be submitted for inspection in a timely manner;

3. Before the construction of external wall insulation, the base should be treated, and the base should be smooth. Solid, no protrusions, steel heads, holes, plastic pipes, etc., bolt holes should be closed tightly, the wall can not have pollutants and release agents that affect the bonding, so that the wall is clean and clean;

4. Before the large-scale construction of external wall insulation, the paste model should be done on the site, including anchor bolt fixing. Finishes, lattice seams, etc. are available for selection.

1. The installation of the hanging basket requires the imitation stone composite insulation board to be constructed by the hanging basket, and the installation of the hanging basket must comply with the safety regulations, and the elastic isolator must be installed on the inner side of the hanging basket to avoid damage to the installed decorative plate when the hanging basket is lifted.

2. The general construction longitudinal baseline should be placed on the top of the building, and the construction transverse baseline should be placed in the contour line of the yin and yang angles and the characteristic outline as the baseline line, and all the baseline should occupy the line construction. In the thermal insulation and decoration integrated board system, the reference line is first played on the wall with ink lines on the construction wall according to the design drawing, and each connecting construction surface is played with a line of Qinxin.

3. The principle of on-site elastic line is carried out according to the layout drawing, and follows three principles: economic principle, aesthetic principle and safety principle.

4. The longitudinal construction of the construction sequence is generally carried out in accordance with the construction sequence from bottom to top, but in order to ensure that each board is on the same horizontal line on the surrounding wall, the first should be the same baseline line of the wall around the building as the starting point upwards and downwards in the order of pasting in two directions.

5. Key points of external wall insulation construction When the base wall experience is qualified, the insulation layer construction can be carried out.

1. In the design of external wall thermal insulation, the integrated design scheme of thermal insulation and structure should be preferred. When designing, the insulation layer and the base layer paste area, anchor bolt specifications and the number of anchor bolts per unit area should be determined by calculating the weight per unit area of the insulation material. The number of anchors per square meter should meet the following requirements:

There are 4 buildings with a building height of 20 m or less, 5 buildings with a building height of 20 to 50 m, 9 buildings with a building height of 50 90 m, and 11 buildings with a building height of 90 m or more. In particular, the number of anchors should be increased on both sides of the gable and the large corner of the gable in the passage between buildings where the spacing between buildings is too small to a few meters wide, considering the instantaneous negative wind pressure.

The effective anchorage depth of the anchor bolt in the base wall shall not be less than 50. When the EPS board is pasted on the concrete base layer, its effective anchorage depth shall not be less than 25. The minimum permissible margin should be 100mm.

Moreover, the standard value of the tensile bearing capacity of a single anchor bolt should meet the requirements under the standard test conditions.

2. When the anchor bolt is still not enough to support the weight of the insulation material, the bracket should be installed, and the bracket specifications, horizontal spacing and vertical spacing used should be clarified. The bracket should be fixed to the base layer, it is strictly forbidden to be directly fixed on the surface layer or insulation layer, and the root of the bracket should be sealed and waterproof designed.

3. The external wall insulation system should use double-layer glass fiber mesh, and the total thickness of the surface layer of glue should be 4 6mm.

4. The exterior wall insulation board should not be directly pasted on the masonry, and should be plastered and leveled before pasting. The plastering layer should be made of cement mortar, and the strength grade should not be lower than M5. After plastering, a waterproof material should be brushed at the joint between the masonry and the concrete component, and the width of each side is 150mm along the joint.

1. Construction process: base treatment - spraying interface agent on both sides of the rock wool board and the side of the board - hanging vertical, elastic control line - pasting the rock wool board with adhesive - wiping the front plastering glue - pressing into the alkali-resistant glass fiber mesh - anchor bolt anchoring plastering plastering glue composite alkali-resistant glass fiber mesh layer - wiping the second plastering glue, and pressing into the alkali-resistant glass fiber mesh - thin wiping the third plastering glue.

2. The treatment of the base wall should meet the following requirements: the surface of the base layer should be clean, free of oil, wax, release agent, coating, weathering, dirt, frost, mud and other materials that hinder bonding. The base layer should be solid and flat, and the allowable deviation of surface flatness is 4mm.

Contaminants that are locally raised, hollow, loose and hindering bonding should be removed.

3. Preparation of adhesive and plastering paste: It should be carried out on site in strict accordance with the ratio and production process provided by the first supplier. The adhesive or plastering glue dry powder is directly added to the appropriate amount of water, and stirred evenly with a special electric mixer to achieve the viscosity required by the project.

Each preparation should not be too much, depending on the different ambient temperature conditions, control within 2 hours or according to the time specified in the product manual.

4. Requirements for pasting rock wool boards: Before pasting rock wool boards, you should first check whether the rock wool boards are dry and whether the surface is smooth and clean; Wet, uneven and polluted rock wool boards shall not be used in the project. According to the technical requirements of building façade design and external thermal insulation, the horizontal and vertical control lines of external doors and windows, as well as expansion and contraction seams, decorative strips, decorative seams, etc., are popped up on the wall.

Vertical reference lines should be hung at the yin and yang corners of the external wall of the building and other necessary places, and horizontal lines should be hung at appropriate positions on each floor to control the verticality and flatness of the rock wool board.

Exterior wall insulation construction specification requirements.

The quality of insulation materials should meet the requirements of drawing design and specifications. Material entry inspection certificate and quality inspection report. The material is re-checked

There shall be no less than 3 random inspections below 20,000m, and no less than 6 random inspections above the above. Take 3 insulation boards, and test items: density, tensile strength, thermal conductivity, combustion performance, etc.

Alkali-resistant glass fiber mesh cloth is 5 meters, and the test items: alkali resistance tensile breaking strength and retention rate. Take no less than 10kg of adhesive mortar and plastering mortar, and take 2kg from each of the 5 bags. Test item: Adhesive strength in dry and wet conditions.

What are the types of exterior wall insulation materials?

1. Expanded polystyrene board. It is a more common insulation material in the exterior wall insulation material, and the frequency of use is very high, because the insulation effect is better, but the hardness of the board is relatively low, and the fire performance is average.

2. Extruded polystyrene board. Also known as XPS board, the board has strong waterproof performance and thermal insulation performance, and the overall hardness is also very suitable for external wall insulation, but the thermal conductivity is relatively low.

3. Phenolic foam. It is a new type of insulation material stacking, with good fire resistance, will not burn in case of fire, will not emit harmful gases, the texture is relatively light, and the thermal insulation performance is good, but the current use of this material is relatively small in buildings.