The key to building energy conservation insulation lies in material selection, structural design, and detail handling. Specific techniques are outlined below:
External Wall Insulation
Material Selection: Prioritize aerated concrete blocks (Grade B05, 300mm thick, K-value 0.12) or graphite EPS boards (50mm thick). These directly meet insulation requirements, eliminating the need for external cladding.
Composite Construction: Employ a "sandwich insulation wall" (120mm load-bearing brick wall + 50mm graphite EPS board + 120mm load-bearing brick wall) to balance fire resistance, burglary prevention, and durability.
Thin-Coat Rendering System: Apply EPS or XPS boards externally, with a recommended thickness of 10-12cm. Seal joints with aluminum foil tape to create a vapor barrier.
Roof Insulation
Sloped Roofs: Employ "integrated tile-laying + insulation technology" with a structure of wooden battens + OSB board + self-adhesive waterproof membrane + tile battens + 10cm XPS board, reducing the roof K-value to 0.25.
Flat Roofs: Employ "blanket-style insulation": insulated concrete slab + brick-built cavity layer + 10cm insulation board + sealed insulation layer. Slope ≥5%, with ≥4 drainage outlets.
Window Energy Efficiency
Thermally Broken Aluminum Window Frames: 34mm wide thermal break, thermal transmittance K≤2.0, paired with 6+16+6 double-silver Low-E insulated glass (K-value 1.4-1.6).
Window-to-wall ratio control: South-facing ≤40%, east/west-facing ≤30%, north-facing ≤25%. Window sill height 450-600mm for natural shading.
Ground Moisture Barrier
XPS Board Installation: Lay 50mm XPS boards over compacted subgrade soil, leaving 20mm expansion joints. Apply aluminum foil reflective membrane on exterior surface (reduces heat transfer by 15%).
Cold Bridge Treatment
Door/Window Corner Sealing: Apply 20mm insulating mortar around openings. Add 0.5% waterproofing agent in southern regions to prevent condensation.
Wall corner insulation strips: Adhere 10mm EPS strips flush with the finished floor level to prevent condensation.