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Construction Steps of Extruded Insulation Board

Views: 119     Author: Site Editor     Publish Time: 2023-05-24      Origin: Site

Ⅰ. Construction conditions of extruded polystyrene insulation board

  • The grass-roots wall has been checked and accepted. All kinds of indoor pipelines, water drop pipe brackets and embedded parts on the door and window frames and walls have been installed according to the design.

  • The flatness of the shear wall is checked with a 2m ruler. If the maximum deviation is greater than 4, it is leveled with 20-thick 1:3 cement mortar; when the maximum deviation is less than 4, the irregularities are repaired with 1:3 cement mortar.

  • The masonry wall shall be leveled with 20-thick 1:3 cement mortar.

  • The base wall and leveling layer should be dry.

  • The ambient temperature of the construction site and the surface temperature of the wall shall not be lower than 5 ℃ within 24 hours after construction, and the wind force shall not exceed level 5.

  • Effective measures should be taken to prevent Rain Water from scouring the wall during summer construction.

extruded insulation board 1

Ⅱ. Construction tools for extruded polystyrene insulation board

Electric wire cutter, slotting machine, wallpaper cutter, screwdriver, hacksaw blade, scissors, electric mixer, impact drill, electric hammer, brush, coarse sandpaper and common tools.

Ⅲ.The construction process of extruded polystyrene insulation board generally includes the following steps:

  • Substrate preparation: Clean, repair, and treat the construction base to ensure a smooth and solid surface. Dust removal, cleaning, crack filling, and other treatments may be performed.

  • Embedded component installation: Install embedded components, such as fixing elements and welding parts, on the substrate according to design requirements to secure the insulation board.

  • Adhesive application: Apply adhesive on the surface of the substrate to form a bonding layer. The type and application method of the adhesive should be selected based on the material of the insulation board and construction requirements.

  • Joint sealant application: Apply joint sealant on the seams of the insulation board to ensure a sealed treatment and prevent the formation of cold and thermal bridges.

  • Insulation board installation: Assemble and install the extruded polystyrene insulation boards according to the design requirements, ensuring seamless joints and maintaining a certain pressure to achieve a tight fit with the substrate.

  • Adhesive fixation: Apply adhesive on the back of the insulation board, adhere it to the surface of the substrate, and take appropriate fixing measures such as nails or tape to ensure the stability of the insulation board.

  • Reinforcement treatment: Reinforce the joints, holes, corners, and other areas of the insulation board using appropriate materials and methods to ensure construction quality and insulation performance.

  • Surface treatment: Perform waterproofing, fireproofing, or other treatments on the surface of the insulation board using coatings, veneers, or other materials to improve its lifespan and protective properties.

  The above are the general construction steps for extruded polystyrene insulation board. Specific construction procedures and methods may vary depending on the project. During the construction process, strict adherence to relevant standards and requirements is necessary to ensure construction quality and safety.

extruded insulation board 2

Ⅳ. Key points of construction operation of extruded polystyrene insulation board


  • Base treatment

  • brush interface agent

  • configure special binder

  • paste extruded board-install fixture

  • polish-act as decorative line angle

  • wipe bottom polymer mortar-press into grid cloth

  • wipe surface layer polymer mortar

  • construction of finishing layer-repair hole

1. Grass-roots treatment.

Thoroughly remove the materials that affect the bond strength, such as floating ash, oil stain, release agent, hollow drum and weathering products on the surface of the base wall.

2. Interfacial agent

In order to increase the adhesion between the extruded board and several layers of the base, the interfacial agent should be brushed together on both sides of the extruded board.

3. Configure special binder:

1) pour 5 parts (weight ratio) of dry-mixed mortar into a clean plastic bucket, add 1 part of clean water, stir while adding water, and then stir with a hand-held electric mixer for 5 minutes until the mixture is uniform and the consistency is moderate.

2) leave the configured binder for 5 minutes, then stir and use it, and the configured binder should be used up within 1 hour.

3) the configuration of special binder is only allowed to add clean water, not other additives (agents).

4. Paste the extruded polystyrene insulation board

  • The size of the plate is 2000 to 600, the diagonal error is less than 2, the extruded board is cut by electric wire cutter or tool knife, and the allowable deviation is ±1.5.

  • Grid cloth flip package: the pre-bonded grid cloth on the extruded board at the door and window opening, both sides of the deformation seam, etc., the total width is about 200, and the width of the package part is 80. The specific practice is as follows: the grid cloth cutting length is 180 plus plate thickness. First of all, apply a special binder with a length of 80 and a width of 2 in the part of the bag, then press into the 80-long grid cloth and throw out the rest.

  • Smear the configured special binder on the back of the extruded board, and the compaction thickness of the binder is about 3. In order to ensure the firm bond, the bonding method can be used.

  • Strip bonding method: apply the special binder horizontally on the extruded board with a tooth blade, with a width of 10, a thickness of 10, and a middle distance of 50.

  • Spot method: apply a special binder with a width of 50 and a thickness of 10 on the periphery and middle of each extruded board, and then wipe the ash cake with a diameter of 100 and a thickness of 10 in the separation area of the extruded board.

  • The extruded board with special binder will be quickly pasted on the wall to prevent the surface from crusting and losing the bonding effect.

Special binder shall not be applied on the side of the extruded board.

  • After the extrusion board is glued to the wall, apply a 2-meter ruler flattening operation to ensure its flatness and firm sticking. there should be no seams between the plates, and the gaps formed by irregular cutting should be jammed and smoothed with extruded lath. After each plate is glued, the special binder for extrusion should be removed.

  • The extrusion board should be pasted horizontally from bottom to top, each row of plates should be 1 inch long, and the local minimum seam should not be less than 100.

extruded insulation board 3

5.Install the fixtures

  • Installation of the fixture begins after 8 hours of pasting of the extruded board and is completed within 24 hours after that. According to the position required by the design, the percussion drill is drilled with a hole diameter of 10, the depth of drilling into the base wall is about 60, and the depth of the fixed part anchoring into the base wall is about 50 to ensure firmness and reliability.

  • The number of fixtures is set according to the requirements of the design instructions.

  • The self-tapping screw should be tightened and the engineering plastic expansion cap should be neatly or slightly screwed into the surface of the extrusion board to ensure that the tail of the expansion nail is screwed back so that it is fully anchored with the base wall.

6. Polishing

  • Rough sandpaper should be used to polish the uneven seams of the extruded board, and the movement should be a gentle circular motion. do not polish along the direction parallel to the seam of the extruded board.

  • Clean up the debris and floating ash of the extruded board with a brush in time after polishing.

7. Make the corner of decorative line

  • According to the design requirements, use the ink line to pop up the position of the line angle, and correct the horizontal and vertical direction.

  • The concave line angle uses the slotting device to cut the extruded plate into notches, and the thinnest notch of the extruded plate is not less than 15.

  • After the convex line angle is cut according to the design size, the interface agent is brushed together on both sides of the line angle and the corresponding extrusion board, and then covered with a special adhesive to make it stick firmly.

8. Wipe the bottom polymer mortar

  • The configuration of polymer mortar is the same as that of special binder.

  • Apply the configured polymer mortar evenly on the extruded board with a thickness of 2.

9. Press into the grid cloth

  • The grid cloth should be cut according to the length and width of the working face, and the lap width should be set aside. The grid cloth should be cut along the warp and weft.

  • When the grid cloth is turned around the openings such as doors and windows, a layer of grid cloth should be added to the four corners, and the whole grid cloth should be on top of the bag and additional grid cloth around the hole.

  • Polymer mortar shall be smeared on the front and side of the extruded board at the mouth of the hole and the overturned part of the grid cloth (only polymer mortar is allowed at the end of the extruded board here). The pre-thrown grid cloth is flipped along the thickness of the plate and pressed into the polymer mortar.

  • Straighten the whole grid cloth horizontally, pay attention to one side of the grid cloth facing inward, and wipe the grid cloth with the middle upward and lower sides to make it close to each other. The lapping width of the grid cloth is not less than 100 in the horizontal direction and the lapping length in the vertical direction is not less than 80. Polymer mortar is used to supplement the vacancy of the bottom mortar at the lap, and the wrinkles, hollow drums and warping edges of the grid cloth are not allowed.

  • At the angle of the concave and convex line, the narrow grid cloth should be embedded in the bottom polymer mortar, the whole grid cloth should be placed on the narrow grid cloth, and the lap width is 80%.

  • At the yin and yang corners of the wall, the two-way winding angles of the grid cloth on both sides overlap each other, and the lap width of each side is not less than 200.

extruded insulation board 4

10. Polymer mortar for plastering layer

  • After smearing the bottom polymer mortar and pressing into the grid cloth, when the mortar solidifies until the surface does not stick, begin to apply the polymer mortar of the surface layer, and the thickness of the plastering surface shall be based on the grid cloth, so that the total thickness of the polymer mortar is 2.5ml 3.0.

  • In order to improve the impact resistance of the exterior wall, a layer of grid cloth should be added, and the two sides should be carried out according to the first two working procedures. The total thickness of polymer mortar is about 3.5mur4.0.

11. Construction of deformation joints and boundary joints

  • The metal cover seam plate of the deformation joint of the wall body should be positioned according to the design and fixed firmly with the base wall before the extrusion board is pasted.

  • At the joint of the metal cover seam plate and the extrusion plate and at the boundary joint, the solid polyethylene rod should be 1.3 times of the seam width, and the sealant should be embedded twice, and the depth should be 50% of the seam width.

  • The construction of sealant should be careful not to pollute the surface layer of the extruded board on both sides.

12. Construction of the finishing layer

The main results are as follows:

  • When the water-soluble high elastic coating is used in the finishing layer, the uneven part of the polymer mortar should be repaired before construction, and polished with fine sandpaper, and then the coating should be applied.

  • When the face tile is used in the finishing layer, the binder and joint mortar should use special ceramic tile binder.

13. Repair holes

  • When the scaffolding is removed, the hole should be repaired in time.

The holes in the wall are filled with the same base wall material and smoothed with 1:3 cement mortar.

  • Cut the extruded polystyrene insulation board according to the size of the hole and polish its edge so that it can be tightly sealed in the hole. And brush the interface agent together on both sides of the extruded board.

  • After the hole cement mortar is solidified, apply 10 thick special binder on the back of the extruded board, plug the extruded board into the hole, and be careful not to apply the special binder on the surrounding edge.

  • The cutting area can cover the grid cloth the size of the whole repair area, and lap 80 with the surrounding grid cloth.

  • Smear the bottom polymer mortar, bury it in the mesh cloth for repair, and then coat the polymer mortar when the surface is not touched, and the thickness should be the same as that of the perimeter.

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