Rock Wool Board Thin Plastering for Exterior Wall Fireproofing
The rock wool board is for exterior wall fireproofing.
The exterior wall insulation fireproofing problem attracts the public attention. The rock wool board thin plastering construction materials follow the standard and its fireproofing is nice. It could decrease the exterior wall loads and has nice crack resistance. The rock wool board thin plastering is the first choose for the building exterior wall insulation system. We are talking about the construction technology for hot dipped galvanized welded wire mesh and alkali resistant fiberglass mesh on the exterior wall insulation rock wool board thin plastering system.
The rock wool board thin plastering exterior wall insulation construction technology.
- The basic level management.
The basic level should be neat and clean. We should water the dry basic level.
- Hang the vertical control line.
According to the architecture design and the exterior wall insulation demands we should hang the vertical control line.
- Install the base bracket.
We install the base bracket after the checkout. We choose the base bracket according to the rock wool board density.
- Confect adhesive and mucilage.
The adhesive should be made when we use it at scene. The quantity should not be too much and should be according to the needs.
- The rock wool board construction.
Before installing the rock wool board, we should make sure the surface is smooth and clean.
- Find the protection layer.
We should use the thickness control line find the construction line. And we would make a plaster cake of this thickness.
- Install the anchoring parts and plaster the anti-crack mucilage.
We would install the galvanized welded wire mesh and fiberglass mesh on the wall.
The construction process.
- The first time plastering.
When the protection layer is solidified we hit an anchoring hole with the impact drilling. The hole is 10 mm deeper than the anchoring. When we plaster the first mucilage, the mucilage cannot cover the hole. Then we put the galvanized welded wire mesh on the plaster mucilage layer. We install the anchoring parts as we install the welded wire mesh. Finally we smooth the mucilage on the galvanized welded wire mesh with the spatula. The connecting for the hot dipped galvanized welded wire mesh should not be more than 100 mm and is banded with the low carbon steel wire. The depth from the anchoring parts to the basic wall should be more than 30 mm. There are at least 6 anchoring parts per square meters. We arrange the anchoring parts with wintersweet-shaped. The diameter of the anchoring should be more than 60 mm.
- The second time plastering.
We plaster for the second time after 24 hours. We put the alkali resistant fiberglass mesh from the top to the bottom and adhere them to the second plastering mucilage. The crooked plastering layer faces inward and we push the fiberglass mesh to the second plastering mucilage with the trowel. The fiberglass mesh should be neat and not drape. The fiberglass mesh should not be more than 6 m. The connecting on the plane should be more than 100 mm and the connecting on the shadow and bright angle should be more than 200 mm. The fiberglass mesh should be continuous and when it is by the window hole we should set a 450° reinforced mesh of 400 × 300 mm on the hole. To prevent crack the normal mesh added to the shadow angle should be as the same size as the insulation layer. The thickness of the plastering mucilage is 4–6 mm. After the plastering mucilage and fiberglass mesh are putted up we should not mix it for 24 hours. When it's very cold we should extend the conservation time. When the surface is solidified we should make the conservation for at least 96 hours and brush moisture proof primer.
The fiberglass mesh is installed on the window hole.
The fiberglass cloth is installed on the hole angel.
The distance for the exterior wall insulation horizontal expansion joint should be more than 6 m and the vertical expansion joint should be less than 12 m. If there is waist line on the building or the surface of the building is not even, the expansion joint is not needed. The width of the expansion joint is more than 20 mm. On the end of the rock wool board should be packed with the turning package and its width should be more than 100 mm. The seam should be sealed up with the sealant and is filled with the felt.