圍護結構的保溫性能通常是指在冬季室內外條件下，圍護結構阻止由室內向室外傳熱，從而使室內保持適當溫度的能力。圍護結構的隔熱性能通常是指在夏季自然通風情況下，圍護結構在室外綜合溫度和室內空氣溫度波作用下，其內表面保持較低溫度的能力。
　　圍護結構的保溫性能和隔熱性能兩者的主要區別在于：
　　（1）傳熱過程不同：保溫性能反應的是冬季由室內向室外的傳熱過程，通常按穩定傳熱考慮。隔熱性能反應的是夏季由室外向室內以及由室內向室外的傳熱過程，通常按以24h為周期的波動傳熱來考慮。
　　（2）評價指標不同：保溫性能通常用圍護結構的傳熱系數K值或傳熱阻R值來評價；隔熱性能通常用夏季室外和室內計算條件下，圍護結構內表面最高溫度來評價。如果在同樣的夏季室外和室內計算條件下，其內表面最高溫度不大于當地夏季室外計算最高溫度，則認為符合夏季隔熱要求。
　　（3）構(gou)(gou)造(zao)(zao)措施(shi)不同：由于圍(wei)護結(jie)(jie)構(gou)(gou)的(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)主要(yao)取(qu)決(jue)于其傳(chuan)(chuan)熱(re)(re)系數K值或傳(chuan)(chuan)熱(re)(re)阻R的(de)(de)(de)大小(xiao)，而圍(wei)護結(jie)(jie)構(gou)(gou)的(de)(de)(de)隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)主要(yao)取(qu)決(jue)于夏(xia)季室(shi)外(wai)和(he)室(shi)內(nei)(nei)計算條件(jian)下內(nei)(nei)表面最(zui)高溫(wen)(wen)度(du)(du)的(de)(de)(de)高低。對于外(wai)墻(qiang)(qiang)(qiang)(qiang)來(lai)說(shuo)，由多(duo)孔輕(qing)質(zhi)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)材(cai)料(liao)構(gou)(gou)成的(de)(de)(de)輕(qing)型墻(qiang)(qiang)(qiang)(qiang)體(ti)(ti)或多(duo)孔輕(qing)質(zhi)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)材(cai)料(liao)內(nei)(nei)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)墻(qiang)(qiang)(qiang)(qiang)體(ti)(ti)，其傳(chuan)(chuan)熱(re)(re)系數K值可(ke)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)小(xiao)，或其傳(chuan)(chuan)熱(re)(re)阻R值可(ke)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)大，即其保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)可(ke)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)好(hao)，但因其實輕(qing)質(zhi)墻(qiang)(qiang)(qiang)(qiang)體(ti)(ti)，熱(re)(re)穩(wen)(wen)定性(xing)(xing)(xing)(xing)較(jiao)(jiao)(jiao)差(cha)，或因其是輕(qing)質(zhi)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)材(cai)料(liao)內(nei)(nei)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)墻(qiang)(qiang)(qiang)(qiang)體(ti)(ti)，其內(nei)(nei)側的(de)(de)(de)熱(re)(re)穩(wen)(wen)定性(xing)(xing)(xing)(xing)較(jiao)(jiao)(jiao)差(cha)，在夏(xia)季室(shi)外(wai)綜合溫(wen)(wen)度(du)(du)和(he)室(shi)內(nei)(nei)空氣(qi)溫(wen)(wen)度(du)(du)波(bo)作用下，內(nei)(nei)表面溫(wen)(wen)度(du)(du)容易升(sheng)得較(jiao)(jiao)(jiao)高，即其隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)可(ke)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)差(cha)。也就是說(shuo)，保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)通常受(shou)構(gou)(gou)造(zao)(zao)層次排列(lie)的(de)(de)(de)影(ying)(ying)響(xiang)較(jiao)(jiao)(jiao)小(xiao)，而隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)受(shou)構(gou)(gou)造(zao)(zao)層次排列(lie)的(de)(de)(de)影(ying)(ying)響(xiang)較(jiao)(jiao)(jiao)大。相同材(cai)料(liao)和(he)厚度(du)(du)的(de)(de)(de)復(fu)合墻(qiang)(qiang)(qiang)(qiang)體(ti)(ti)，內(nei)(nei)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)構(gou)(gou)造(zao)(zao)，隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)差(cha)；外(wai)保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)構(gou)(gou)造(zao)(zao)隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)較(jiao)(jiao)(jiao)好(hao)。造(zao)(zao)成上述情況的(de)(de)(de)原(yuan)因從保(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)和(he)隔(ge)(ge)熱(re)(re)性(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)指標的(de)(de)(de)計算方法和(he)計算結(jie)(jie)果中可(ke)以了解(jie)得更(geng)為清楚。

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