我國的《屋面工程技術規范》對屋面防水分為永久性工程和非永久性工程，永久性工程中又根據工程性質，對國家、人們生活重要程度和使用功能要求分為Ⅰ～Ⅲ級，IV只適用于非永久性工程。同時對其不同設防所用的材料也有不同的要求。建筑物表面裝飾工程也需要分等級的進行防水設防，因為每個建筑的構成結構不一樣，建筑物的材料屬性不一樣，所以對防水的要求有著不同的要求。
根據防水等級、設防要求和工程實際情況確定防水設計方案和選擇防水材料建筑物防水工程的防水設計方案和防水材料的選用,應根據建筑物的防水部位、類型性質、重要程度、使用功能、結構特點、耐久年限、氣候條件和工程具體情況等綜合因素來確定。
According waterproof rating, fortification requirements and engineering design determined waterproof waterproof design and selection of building waterproofing waterproofing materials and selection of waterproof material, waterproof parts of the building should be based on the type of nature, the importance of using the function, structure characterized by a combination of factors, durable life, climatic conditions and project specific circumstances, such as to determine.
特別重要和防水有特殊要求的建筑，防水層的合理使用年限在25年左右，防水材料可選擇合成高分子防水卷材、金屬板材、高聚物改性瀝青防水卷材、合成高分子防水涂料、細石防水混凝土等材料，設防要求在三道或三道以上防水設防。
Particularly important and waterproof construction with special requirements, reasonable service life of the waterproof layer is about 25 years, choose synthetic polymer waterproof material waterproof membrane, sheet metal, polymer modified bitumen membrane, synthetic polymer waterproof coating , fine stone waterproof concrete and other materials, fortification requirements in three or three more waterproof fortification.
重要的建筑和高層建筑，防水層的合理使用年限在15年左右，防水材料可選擇高聚物改性瀝青防水卷材、合成高分子防水卷材、硅酸鈣板、金屬板材、合成高分子防水涂料、高聚物改性瀝青防水涂料、細石防水混凝土、平瓦、油氈瓦等材料，設防要求在二道以上防水設防。
Important buildings and high-rise buildings, reasonable service life of the waterproof layer is about 15 years, waterproof material optional polymer modified bitumen membrane, synthetic polymer waterproofing membrane, calcium silicate board, sheet metal, synthetic polymer waterproof coatings, polymer modified asphalt waterproof coating, waterproof fine stone concrete, flat tiles,shingles and other materials, fortification requires two or more waterproof fortification.
一般的建筑，防水層的合理使用年限在10年左右，防水材料可選擇三氈四油瀝青防水卷材、高聚物改性瀝青防水卷材、合成高分子防水卷材、金屬板材、高聚物改性瀝青防水涂料、合成高分子防水涂料、細石防水混凝土、平瓦、油氈瓦等材料，設防要求在一道以上防水設防。
General construction, reasonable service life of the waterproof layer is about 10 years, waterproof material choose three felt four oil bitumen membrane, polymer modified bitumen membrane,synthetic polymer waterproofing membrane, sheet metal, high-poly modified bitumen coating materials, synthetic polymer waterproof coating, waterproof fine stone concrete, flat tiles, shingles and other materials, requires a more waterproof fortification fortification.