Construction scheme of external wall insulation

The external wall thermal insulation construction scheme is a tool to guide our specific construction, so that we can pay attention to all aspects of safety and environmental protection in the construction process. I have arranged the construction scheme of external wall insulation for everyone, welcome to learn from it.

Construction scheme of external wall insulation 1

I. Basis for compilation

1. This thermal insulation construction scheme is compiled according to the requirements of external thermal insulation system in the project design documents.

2. The insulation construction technology, insulation construction method and quality acceptance of this insulation construction scheme are compiled according to the following standards:

Technical specification for external wall thermal insulation engineering JGJ 144-2004

External wall thermal insulation 05J3- 1

Code for acceptance of construction quality of building energy-saving projects (GB504 1 1-2007)

Second, the project overview

Sheng Xing Residential Project South of Tianjin Eco-city 05-08-02-0/plot Sheng Xing Residential Project is located at the intersection of Hefeng Road and He Yun Road, Sino-Singapore Tianjin Eco-city, Hangu District, Tianjin 05-08-02-0/plot Kloc-0/. The total land area is 77 100 m2, and the total construction area is 103774.93 m2 (including 72763.99 m2 above ground and 310/0.94 m2 underground). The proposed project includes 719 ~ 22nd floor residential buildings, 4/9 ~1floor residential buildings, 1 ~ 2f supporting public buildings and doormen.

Engineering practice of coating exterior wall (1):

1, brush a layer of concrete interface treatment agent (with the brush, wipe the bottom ash)

2, polymer cement mortar binder, 80 thick composite phenolic insulation board.

3. Polymer cement mortar with a layer of alkali-resistant glass fiber grid cloth pressed in the middle.

4, elastic putty

5, elastic coating two (waterproof)

The external wall insulation construction technology of this project adopts adhesive to stick composite phenolic board, composite phenolic foam insulation board (FPF board for short) and anchor bolt to anchor insulation layer; Plastering mortar is combined with alkali-resistant grid cloth to form a thin plastering reinforced protective layer; Finishing layer Among them, FPF thin plastering external wall thermal insulation system consists of base layer, adhesive layer, thermal insulation layer (FPF board), alkali-resistant glass fiber mesh, thin plastering layer and decorative layer (see the figure below).

Third, the construction deployment

This project plans to organize three teams to carry out external wall insulation construction, and complete the insulation construction within 40 days.

It is planned to organize constructors 1 10, hanging baskets 100 and 6 mixers.

System structure diagram

Fourth, the construction preparation

1, material preparation

Thermal insulation materials shall meet the specified quality requirements. After the thermal insulation main materials are transported to the construction site, relevant certificates and factory inspection reports shall be provided. Sampling inspection shall be carried out on the materials entering the site, and they shall be used after passing the inspection.

2. Technical preparation

Before construction, you should know the design documents and drawings, master the detailed structure and related technical requirements in construction, and make technical disclosure.

3, basic insulation inspection and acceptance

3. 1 external wall

If the external wall base meets the requirements, the following inspection shall be carried out for the external wall base, and the insulation construction can be carried out only after it meets the requirements.

3.2 The surface of external wall thermal insulation base shall be smooth and firm, clean and dry, and meet the design requirements. Cement mortar leveling shall not be crisp, sand, peeling and empty drum.

3.3 The external wall insulation base must be clean, dry and smooth, and the flatness of the leveling layer should be gradual.

3.4 Before construction, doors and windows should pass the acceptance, and the size and position of the hole should meet the design and quality requirements. Door and window frames or attached frames, various pipes, downpipe supports, embedded parts and other parts shall be installed. And according to the requirements of thermal insulation system, the thickness of thermal insulation layer is reserved. The gap between the door window frame and the wall should be filled with foamed polyurethane.

3.5 Phenolic foam board should be coated with interface treatment agent before the upper wall, and the dosage of interface treatment agent is 0.5 ~ 1.0 kg/㎡. After the surface of the interface treatment agent is dried, the insulation board can be laid.

3.6 before large-scale construction, the same materials, construction methods and techniques should be adopted to make the model wall at the scene, and the model wall should be made of

Construction can only be carried out after confirmation by relevant parties.

3.7 When the floor is more than 7 floors, the gables should be provided with metal embedded belts, and supported by anchor bolts. Set in the mezzanine from the 7th floor to18th floor; 18 above each floor setting.

4, construction machinery preparation

Thermal insulation construction machines and tools mainly include: paper cutter, screwdriver, steel brush, square shovel, trolley, wire pliers, coarse sandpaper, electric stirrer, plastic mixing barrel, impact drill, rubber hammer, trowel, press, internal and external angle trowel, wire support plate and 2m guide rule.

Verb (abbreviation of verb) technological process

1 Flowchart:

2 Construction method

2. 1 Apply adhesive

Daubing method: using the point-and-frame bonding method, daub a circle of stirred adhesive around the board surface with a width of 50mm, and evenly daub 5-6 points in the center of the board surface to ensure that the pasting area is not less than 50%.

2.2 cardboard

Stick the glue board directly on the wall and gently rub it left and right. The polystyrene board should be pasted flat. The arrangement of plates is from bottom to top, with vertical staggered joints and angles, and the plates should be close to each other. Meet ash? , more than 5mm gap should be filled with polystyrene board with corresponding width, and mortar should not be used.

When installing insulation board on the vertical plane, measure and set out from the wall foundation and solid permanent or temporary support, and hang the baseline.

2.3 Fill the flat seam and grind it flat.

When sticking plates, the plate joints should be squeezed tightly, and the adjacent plates should be flush, the gap between plates should not be greater than 5mm, and the height between plates should not be greater than 2 mm, otherwise the polystyrene plates should be filled and polished flat. Defects on the surface of polystyrene board and gaps larger than 5㎜ between boards during pasting must be filled with polystyrene board.

If there is dislocation between polystyrene boards with different heights, it should be polished and leveled at least 24 hours after sticking polystyrene boards. After grinding, the board surface should be cleaned.

Note: Before polishing polystyrene board, make sure that the bonding putty and polystyrene board have formed a firm bond.

2.4 Preparation of Plastering Slurry

Pour gypsum slurry dry powder into a clean container, add a certain proportion of water according to product requirements, and use it after mechanical stirring. It is not advisable to mix too much at a time, but use it while mixing.

2.5 Composite construction (plastering mortar and pressing alkali-resistant grid cloth)

Composite construction is the construction of thin plastering reinforced protective layer composed of plastering mortar and alkali-resistant grid cloth.

Firstly, the plastering paste is evenly spread on the bonded insulation board with a spatula, the thickness is about 2㎜, and the width is slightly larger than the alkali-resistant grid cloth; Then immediately spread the alkali-resistant grid cloth on the newly plastered gypsum and compact it with a spatula to make it adhere smoothly; Apply plastering mortar evenly on alkali-resistant grid cloth with spatula again. The spatula should be wiped from the middle to both sides, so that the alkali-resistant grid cloth is flat and firmly embedded in the plastering mortar, and all the grid cloth is embedded in the wet mortar, and there can be no network cable exposed. Finally, a reinforced protective layer with a thickness of 3 ~ 5 mm is formed by compounding.

3 construction points

2. 1 basic wall treatment: the wall surface should be clean, and there are no floating ash, oil stains and other attachments that hinder adhesion. After the acceptance of the wall at the grass-roots level, cement mortar leveling layer should be plastered. The leveling layer shall be plastered in layers, and the thickness of plastering at one time shall not exceed 10 mm. Check with 2m measuring ruler, and the maximum deviation shall be less than 4mm. The out-of-tolerance part shall be repaired by chiseling.

2.2 The elastic control line shall meet the following requirements:

2.2. 1 according to the technical requirements of building facade design and external wall insulation system, horizontal and vertical expansion joints and decorative joints of external doors and windows pop up on the wall.

2.2.2 Hang vertical datum control lines at the angle of yin and yang and other necessary places on the external wall of the building, and hang horizontal lines at appropriate positions on each floor to control the verticality and smoothness of FPF board pasting.

2.3 The preparation of adhesive shall meet the following requirements:

2.3. 1 The special person shall be responsible for the preparation of the adhesive. It is required to stir evenly and have a moderate consistency to ensure that the adhesive has a certain viscosity.

2.3.2 According to the requirements of the product manual, let the prepared adhesive stand for a certain period of time, and then use it after stirring. The prepared adhesive should be used up within the specified time.

2.4 pasting FPF board shall meet the following requirements:

2.4. 1 Before pasting, determine the specifications and quantity of special-shaped plates.

2.4.2 Use a special cutting tool to cut the FPF board on site, but it must be noted that the incision is perpendicular to the board surface.

2.4.3 Bonding shall be carried out in sections, and sufficient fireproof spacing shall be maintained.

2.4.4 It should be pasted horizontally from bottom to top. The vertical staggered joints of the upper and lower rows should be 1/2 of the plate length, and the minimum staggered joint size should not be.

Less than 200 mm. Corners should be staggered and interlocked. The insulation boards at the four corners of doors, windows and holes shall be cut and formed by a whole board, and shall not be spliced. The distance between the joint and the four corners of the hole shall not be less than 200mm.

2.4.5 The gaps between plates shall be filled with polyurethane foam.

2.5. The anchoring bolts shall be fixed at least 24 hours after the FPF plate is pasted. When the anchor bolt is fixed, its specification, quantity, position, anchoring depth and drawing force should meet the design requirements.

2.6. Protective layer construction shall meet the following requirements:

2.6. After the1FPF board is fixed, it shall be inspected and accepted, and the plastering mortar protective layer shall be constructed. When fixing, protective layer should be applied, and the height of FPF plate without protective layer should not exceed three layers (9mm).

2.6.2 On the surface of FPF board, coat a layer of primer with an area slightly larger than that of mesh cloth. Immediately put the grid cloth on it, put the curved side inward, and smooth it with a trowel from the middle to the surrounding to make it close to the surface of the bottom plastering paste.

2.6.3 Before the bottom plastering mortar condenses, cover the surface with plastering mortar. Intermittent construction should be naturally disconnected at deformation joints, yin and yang angles and platform pick-ups. , in order to facilitate the subsequent construction lap. If it is necessary to pause on the continuous wall, the surface cement cannot completely cover the laid grid cloth, and it should be stepped with the grid cloth and the underlying mortar, and the stubble spacing should not be less than 150mm, so as to avoid the grid cloth overlapping flatness exceeding the deviation.

2.6.4 The protective layer structure shall meet the requirements of the protective layer structure of the thermal insulation system at the corner of the wall, around the openings of doors and windows, the first floor of the building and other vulnerable parts.

Six, insulation engineering detail node processing

1, deformation joint insulation detail structure

See attached drawings for details of roof and external wall insulation of deformation joints.

2, door and window insulation detail structure

The upper edge, lower edge and frame of the thin insulation parts of doors and windows are treated, and the construction structure is shown in the attached figure.

The length of the FPF plate should not be greater than 1200mm, the width should not be greater than 600mm, and the thickness should meet the design requirements.

3. The sealing and waterproof structure design of the external wall thermal insulation project should ensure that water will not penetrate into the thermal insulation layer and the base, and the important parts should have detailed drawings. Horizontal or inclined overhanging parts and parts extending below the ground shall be waterproof. Equipment or pipes installed on the external thermal insulation system of the external wall shall be fixed on the base, sealed and waterproof.

4, doors and Windows corners, Yin and Yang Angle and decorative joint should be set up local reinforcement network. The external thermal insulation structure of doors, windows and openings of buildings shall meet the following requirements:

A. the FPF plate thickness of the wall around the door and window openings should not be less than 25mm.

B FPF plates at the four corners of doors and windows shall be cut and formed as a whole when laid, and there shall be no splicing phenomenon. The distance between the joint of the plate and the corner of the hole shall not be less than 200mm;

C when laying alkali-resistant glass fiber grid cloth, 45? Angle of inclination plus 200? 300 mm standard mesh cloth.

Schematic diagram of grid cloth reinforcement for door and window openings

5. When sticking FPF board, the bonding area ratio between building insulation board and contact wall below 7 floors should not be less than 50%; The bonding area ratio between insulation board and contact wall of 7-storey and above buildings should not be less than 70%, and the building practices are consistent.

6.FPF board should be pasted from bottom to top, and aluminum alloy bracket should be set at the starting point of the first floor. The selection and setting of anchor bolts are determined according to the calculation of negative wind pressure when anchor bolts are assisted in fixing.

7. Before plastering mortar construction, anchor bolts shall be drilled and installed on the board surface according to the specified number and position.

8. The thin plastering external thermal insulation system shall be waterproof and thermal insulation at the deformation joints of buildings, and its thermal insulation structure (see attached figure) shall meet the following requirements:

Deformation joints should be filled with low-density EPS board; The deformation joint should be wrapped, and the width of the wrap should not be less than100 mm.

Special construction scheme of external wall thermal insulation project

Deformation joint thermal insulation structure

9 The external thermal insulation structure of building footrest shall meet the following requirements:

1 There shall be a gap of not less than 20mm between the external thermal insulation of the footrest and the outdoor ground apron;

2 Gap shall be filled with EPS.

Plates and external openings shall be provided with backing materials and sealed with weather-resistant building sealant.

3. The end of the pulling foot should be wrapped with standard mesh cloth and reinforced mesh cloth, and the width of the wrap should not be less than100 mm. ..

External thermal insulation structure with basement footrest part

In the external thermal insulation project of 10 FPF board thin plastering external wall, Liuxue 86FPF board should be fully covered at the cornice and parapet of the building to prevent thermal bridge. When there is a gutter, ensure that the top surface of the gutter concrete has an FPF board insulation layer with a thickness of not less than 20 mm

1 1 Construction method for external thermal insulation of building doors and windows;

Thermal insulation structure of cornice and parapet

Schematic diagram of door and window orifice layout

12 construction method of external thermal insulation at building corner.

Schematic diagram of layout of corner plates for external thermal insulation of external walls

Seven, insulation engineering construction quality control measures

1 thermal insulation materials shall be properly kept after entering the site to prevent failure or damage.

2 thermal insulation construction projects should be equipped with technical and quality leaders. Before construction, the person in charge of technology and quality should be familiar with the technical and quality requirements of insulation engineering, improve the construction scheme, and make technical disclosure to each construction team.

Quality control in the construction process is the key to the quality of thermal insulation engineering, and the construction should be carried out in strict accordance with the construction technology standards and technical disclosure.

4. Self-inspection control measures should be implemented in the process of thermal insulation construction, and every working procedure completed in the construction should be inspected in time, and problems found should be handled in time to avoid quality accidents.

5 In the process of construction, keep abreast of the weather forecast, prepare rainproof colored strips and take rainproof measures. Outdoor construction requires that the temperature should not be lower than 5℃, and the construction should be carried out in the weather without rain and fog. In case of rain during construction, the thermal insulation construction should be stopped immediately, and the thermal insulation finishing work should be carried out under cover.

6. On-site construction personnel strictly implement the company's engineering quality management system and post responsibility system, and the on-site project department regularly summarizes the appraisal, and rewards and severely punishes teams and individuals who do not pay attention to quality problems and violate operating norms. 7 Protection and control measures of thermal insulation finished products

After the completion of thermal insulation products, organize acceptance as soon as possible. After passing the inspection, hidden records and quality acceptance records must be filled in and delivered to the subsequent construction to prevent the insulation layer from being damaged.

When the project department plans to arrange, it is forbidden to cross construction; If the insulation layer is damaged due to special circumstances, the project department should be informed first.

Management personnel shall make statistics, make timely maintenance and make visa and maintenance records, and the construction of the next working procedure can be carried out only after maintenance. Avoid damaging the insulation layer.

The surface of thermal insulation products, such as mortar or other dirt, should be cleaned up in time.

Temporary protection measures should be taken for the entrance, external corner and other parts that may cause damage to thermal insulation products in subsequent construction. Each structural layer of thermal insulation system should be protected from water immersion, impact and vibration before curing. If there is any damage, it should inform the insulation team, and make visa and maintenance records in time to avoid potential quality problems. Eight, thermal insulation engineering construction safety control measures

1, carry out civilized construction requirements, promote modern management science, organize construction scientifically, and do a good job in safety management on the construction site.

2. Strictly implement the site safety system of the general contracting construction unit.

3, construction and lighting electricity should strictly abide by the operating rules, to prevent electric shock and mixer injury accidents.

4. Edge operations, aerial work, lifting and other safety measures should be taken. Safety helmet, work shoes and safety rope must be worn during construction, and illegal operation is strictly prohibited.

5, adhere to the civilized construction, clean up construction waste at any time, to ensure smooth roads, on-site construction waste water and sludge timely discharge and outbound. Materials and tools should be cleaned up after work every day to keep the construction site clean and tidy.

6, strictly abide by the labor discipline and the provisions of the construction site, the construction site is strictly prohibited to play cards, drink, make trouble, non-working personnel shall not enter without authorization.

Nine, insulation engineering quality acceptance and inspection standard 1, inspection standard

The quality acceptance shall conform to the Technical Specification for Exterior Wall Thermal Insulation Engineering (JGGG144-2004) and the Code for Acceptance of Construction Quality of Building Energy Saving Engineering (GB 5041KLOC-0/-2007). 2. Master control project

The variety, quality and performance of the materials used shall meet the requirements.

The thickness and structure of insulation layer should meet the requirements of building energy-saving design, and the thickness of insulation layer should be uniform. The insulation layer must be firmly bonded with the wall and various structural layers without delamination, hollowing and cracking. 3. General projects

The surface is smooth and clean, with smooth summer-planting and straight line angle.

Corner protectors shall conform to the construction specifications, the surface shall be smooth, the gaps between doors and windows and the wall shall be tightly filled, and the surface shall be smooth.

4. See table for allowable deviation and inspection method.

X. Thermal insulation structure of detail joints (attached figure) 1. The attached drawings are schematic structural diagrams of local thermal insulation details.

2. If there is any discrepancy in the thermal insulation structure of a certain detail, the design documents or technical disclosure of Party A shall prevail.

Detail structure of roof deformation joint

Detail structure of wall deformation joint

Detail structure of upper edge of window

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