How to Install Rock Wool in Container Houses

The installation of rock wool in container houses should follow these steps:

I. Pre-construction Preparation

• Substrate Inspection: Ensure that the substrate wall (such as container metal panels or concrete) is firm, flat, clean, and dry, without defects such as hollows, cracks, or oil stains. The flatness deviation should be ≤4mm/2m, and the perpendicularity deviation ≤5mm/floor height. If the substrate is a metal panel, anti-rust treatment should be carried out first.
• Material Preparation: Select rock wool boards that meet standards (density ≥120kg/m³, thermal conductivity ≤0.040W/(m·K)), special adhesive mortar, alkali-resistant fiberglass mesh, anchors, etc. Materials should be inspected and approved, and stored separately in a dry and ventilated place to avoid moisture.
• Technical Preparation: Prepare a specialized construction plan, specifying the layout diagram, the number of anchor arrangements, and detailed node drawings. Conduct technical briefings and safety training for construction personnel, emphasizing fire prevention, waterproofing, and quality control points.

II. Rock Wool Board Installation

• Line Marking and Layout: Mark horizontal and vertical control lines and dividing lines on the wall to ensure accurate board layout. Rock wool boards are generally 1200mm×600mm in size and should be laid from bottom to top with staggered joints horizontally and vertically. The staggered joint width should be ≥1/2 of the board length to avoid continuous joints. The four corners of door and window openings should be cut from whole boards, with joints at least 200mm away from the corners of the openings.
• Adhesive Application: Apply adhesive mortar using the dot-and-frame method. Apply a 50mm-wide continuous mortar strip along the board edges and eight mortar dots with a diameter ≥140mm in the middle, all with a thickness ≥8mm. The adhesive area should be ≥50% (≥60% for high-rise or important areas). Lay the rock wool boards horizontally along the long edge, applying uniform pressure to ensure full adhesion to the substrate. The compressed thickness of the adhesive mortar should be ≤3mm. Check the flatness with a 2m straightedge at any time, ensuring that the board joint gap is ≤1.5mm and the height difference is ≤1mm.
• Anchor Installation: After the adhesive mortar has initially cured (generally after 24 hours), drill holes in the rock wool boards and install anchors. The number, type, and penetration depth of anchors should meet design requirements, with denser arrangements at external corners, eaves, etc. The effective anchoring depth of anchors into the wall should be ≥30mm.

III. Rendering Layer Construction

• Board Joint Treatment: Use rendering mortar to level the board joints and paste narrow standard mesh for reinforcement.
• Rendering Layer Application: Apply the first layer of rendering mortar to a thickness of about 2-3mm, and immediately press in alkali-resistant fiberglass mesh, ensuring that the mesh is fully covered without wrinkles or exposure. After the first layer has slightly hardened, apply the second layer of rendering mortar (thickness about 1-2mm), bringing the total thickness to 3-5mm.

IV. Subsequent Construction

• Finishing Layer Construction: After the rendering layer has fully dried and cured, carry out painting, finishing mortar, etc., according to design requirements.
• Roof Construction Precautions: For roof insulation, ensure tight joints and use a double-layer staggered layout. For walkable roofs or areas with high load requirements, select rock wool boards with higher compressive strength.