DB11/T 1945-2021 屋面防水技术标准

北京市地方标准DB

编号：DB11/T1945-2021

屋面防水技术标准

Technicalstandardofroofwaterproofing

2021-12-28发布2022-04-01实施

北京市住房和城乡建设委员会

联合发布

北京市市场监督管理局

北京市地方标准

屋面防水技术标准

Technicalstandardofroofwaterproofing

编号：DB11/T1945-2021

主编单位：北京城建科技促进会

中建二局第三建筑工程有限公司

批准部门：北京市市场监督管理局

实施日期：2022年04月01日

2021年北京

DB11/T1945-2021

前言

根据原北京市质量技术监督局《2018年北京市地方标准制修订项目计划》（京质监

标发[2018]20号）的要求。标准编制组经广泛调查研究，认真总结实践经验，并在广泛

征求意见的基础上，制定本标准。

本标准的主要技术内容是：1总则；2术语；3基本规定；4材料；5平屋面防水设

计；6坡屋面防水设计；7光伏屋面防水；8平屋面防水施工；9坡屋面防水施工；10

工程质量验收；11屋面系统维护。

本标准由北京市住房和城乡建设委员会、北京市市场监督管理局共同负责管理，北

京市住房和城乡建设委员会归口并组织实施，北京城建科技促进会负责本标准技术内容

的解释。执行过程中如有意见或建议，请寄送至北京城建科技促进会（北京市西城区广

莲路1号，北京建工大厦A座9层907室；邮编：100055；电话：010-63965212；电子

邮箱：143c@）。

本标准主编单位：北京城建科技促进会

中建二局第三建筑工程有限公司

本标准参编单位：北京东方雨虹防水技术股份有限公司

北京市市政工程研究院

深圳市卓宝科技股份有限公司

山东宏源防水工程有限公司

北京圣洁防水材料公司

北京城建远东建设投资集团有限公司

北京大唐首邑建筑集团有限责任公司

北京市建设工程物资协会

本标准主要起草人员：王建明许宁杨发兵李小溪李军王玉芬牛晓凯

杜昕董玲周一萌王尧潘宏宇李国力陈方勇

李占江杨东波胡京波金惠荣崔晓青周吉龙郑文利

本标准主要审查人员：叶林标曲慧程峰杜博张陆阳孙成珩周文琴

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DB11/T1945-2021

目次

1总则.............................................................................................................................................................................1

2术语.............................................................................................................................................................................2

3基本规定....................................................................................................................................................................3

4材料.............................................................................................................................................................................5

4.1一般规定............................................................................................................................................................................5

4.2防水卷材............................................................................................................................................................................5

4.3防水涂料............................................................................................................................................................................6

4.4密封材料............................................................................................................................................................................6

4.5辅助材料............................................................................................................................................................................7

5平屋面防水设计........................................................................................................................................................8

5.1一般规定............................................................................................................................................................................8

5.2正置式屋面防水...............................................................................................................................................................8

5.3夹芯式屋面防水.............................................................................................................................................................16

6坡屋面防水设计......................................................................................................................................................24

6.1一般规定............................................................................................................................................................................24

6.2块瓦屋面..........................................................................................................................................................................25

6.3沥青瓦屋面......................................................................................................................................................................26

6.4波形瓦屋面......................................................................................................................................................................27

6.5细部构造..........................................................................................................................................................................28

7光伏屋面防水..........................................................................................................................................................36

8平屋面防水施工......................................................................................................................................................37

8.1一般规定............................................................................................................................................................................37

8.2找坡层和找平层.............................................................................................................................................................37

8.3隔汽层...............................................................................................................................................................................38

8.4卷材防水层......................................................................................................................................................................38

8.5涂膜防水层......................................................................................................................................................................43

8.6聚乙烯丙纶复合防水层...............................................................................................................................................45

8.7隔离层与保护层.............................................................................................................................................................46

9坡屋面防水施工......................................................................................................................................................47

9.1一般规定..........................................................................................................................................................................47

9.2烧结瓦、混凝土瓦屋面...............................................................................................................................................48

9.3沥青瓦屋面......................................................................................................................................................................48

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DB11/T1945-2021

10工程质量验收........................................................................................................................................................50

10.1一般规定........................................................................................................................................................................50

10.2找坡层与找平层..........................................................................................................................................................50

10.3隔汽层.............................................................................................................................................................................51

10.4卷材防水层....................................................................................................................................................................51

10.5涂膜防水层....................................................................................................................................................................52

10.6瓦屋面防水层...............................................................................................................................................................53

10.7隔离层.............................................................................................................................................................................54

10.8保护层.............................................................................................................................................................................54

11防水工程维护........................................................................................................................................................56

附录A屋面防水构造做法........................................................................................................................................57

附录B屋面防水材料进场检验项目........................................................................................................................59

本标准用词说明..........................................................................................................................................................63

引用标准名录..............................................................................................................................................................64

附：条文说明..............................................................................................................................................................66

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DB11/T1945-2021

CONTENTS

1Generalprovisions.................................................................................................................1

2Terms......................................................................................................................................2

3Basicrequirements................................................................................................................3

4Materals................................................................................................................................5

4.1Generalrequirements.......................................................................................................5

4.2Waterproofsheet..............................................................................................................5

4.3Waterproofcoating...........................................................................................................6

4.4Sealingmaterial................................................................................................................6

4.5Supplementarymaterials..................................................................................................7

5Waterproofdesignforflatroof............................................................................................8

5.1Generalrequirements.......................................................................................................8

5.2Uprightroofwaterproof...................................................................................................8

5.3Sandwichlaminatedroofwaterproof.............................................................................16

6Waterproofdesignforslopingroof....................................................................................24

6.1Generalrequirements.....................................................................................................24

6.2Tileroof..........................................................................................................................25

6.3Asphaltshingleroof.......................................................................................................26

6.4Corrugatedtileroof........................................................................................................27

6.5Details.............................................................................................................................28

7Photovoltaicroofwaterproofing........................................................................................36

8Waterproofconstructionforflatroof................................................................................37

8.1Generalrequirements.....................................................................................................37

8.2Slopelayerandscreedcoat............................................................................................37

8.3Vaporretarder................................................................................................................38

8.4Waterproofsheet............................................................................................................38

8.5Waterproofcoating.........................................................................................................43

8.6PEpolypropylenefibercompositewaterproofmembrane.............................................45

8.7Isolatedlayerandprotectivelayer.................................................................................46

9Waterproofconstructionforslopingroof.........................................................................47

9.1Generalrequirements.....................................................................................................47

9.2Sinteredtileandconcretetileroofs..............................................................................48

9.2asphaltshingleroof........................................................................................................48

10Acceptance..........................................................................................................................50

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DB11/T1945-2021

10.1Generalrequirements...................................................................................................50

10.2Slopelayerandscreedcoat..........................................................................................50

10.3Vaporretarder..............................................................................................................51

10.4Waterproofsheet..........................................................................................................51

10.5Waterproofcoating.......................................................................................................52

10.6Waterprooffortileroof................................................................................................53

10.7Isolatedlayer................................................................................................................54

10.8Protectivelayer.............................................................................................................54

11Maintenanceforroofwaterproofing...............................................................................56

AppendixADesignschemeforroofwaterproof................................................................57

AppendixBReinspectionitems.........................................................................................59

Explanationofwordinginthisstandard..............................................................................63

Listofquotedstandards........................................................................................................64

Addition:Explanationofprovisions.....................................................................................66

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DB11/T1945-2021

1总则

1.0.1为提高屋面防水工程的技术水平，确保防水工程的质量，做到技术先进，经济合

理、节能环保、安全适用，制定本标准。

1.0.2本标准适用于北京市新建、扩建和改建的工业与民用建筑屋面防水工程的设计、

施工及验收。

1.0.3屋面防水工程的设计、施工及验收除应符合本标准外，尚应符合国家及北京市现

行有关标准的规定。

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DB11/T1945-2021

2术语

2.0.1平屋面flatroof

正置式屋面坡度小于5％、倒置式屋面坡度小于3％的屋面。

2.0.2坡屋面sloperoof

坡度不小于5％的屋面。

2.0.3复合防水层compoundwaterprooflayer

由彼此相容的卷材和涂料组合而成的防水层

2.0.4附加层additionallayer

在易渗漏及易破损部位单独设置的卷材或涂膜防水层

2.0.5防水垫层underlayment（waterproofcushion）

坡屋面中铺设在瓦材或金属板下面起防水、防潮作用的防水材料。

2.0.6正脊flatridge

坡屋面屋顶的水平交线形成的屋脊。

2.0.7斜脊sloperidge

坡屋面斜面相交凸角的斜交线形成的屋脊。

2.0.8光伏瓦photovoltaictile

太阳能光伏电池与瓦材的复合体。

2.0.9光伏防水卷材photovoltaicwaterproofsheet

太阳能光伏薄膜电池与防水卷材的复合体。

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DB11/T1945-2021

3基本规定

3.0.1屋面防水工程应根据建筑物的性质、重要程度、使用功能要求以及防水层耐用年

限等确定防水等级，并应按等级要求进行防水设防设计，屋面工程的防水等级和设防要

求不宜低于表3.0.1的规定。

表3.0.1屋面工程防水等级和设防要求

防水等级建筑类别设防要求

Ⅰ级重要建筑和高层建筑三道防水设防

Ⅱ级一般建筑两道防水设防

3.0.2屋面防水工程设计使用年限不应低于20年。

3.0.3屋面防水工程应根据工程特点按屋面防水等级的设防要求进行防水构造设计，细

部节点部位应有详图。

3.0.4屋面防水工程当采用多种防水材料复合使用时，相邻施工的两道防水层防水材

料应相容，耐老化、耐穿刺的防水材料应在最上一层。

3.0.5种植屋面应按Ⅰ级防水进行设计，最上一道防水层应采用耐根穿刺防水材料，或

在其上增设耐根穿刺构造，防水设计与施工应符合现行行业标准《种植屋面防水技术规

程》JGJ155的规定。

3.0.6金属屋面防水的设计、施工与验收应符合现行行业标准《采光顶与金属屋面技术

规程》JGJ255、《单层防水卷材屋面工程技术规程》JGJ/T316及现行地方标准《压型金

属板屋面工程施工质量验收标准》DB11/T848的规定。

3.0.7单层防水卷材屋面采用的防水材料应符合现行行业标准《单层防水卷材屋面工程

技术规程》JGJ/T316的规定。

3.0.8屋面防水工程施工前，应进行图纸会审，掌握施工图中的细部构造及有关技术要

求，并应编制防水工程的施工方案。

3.0.9屋面防水工程施工应在基层质量验收合格后进行。

3.0.10伸出屋面的管道、设备、基座或预埋件等，应在防水施工前安装牢固，并做好密

封防水处理。保温防水施工完成后，不得在其上凿孔、打洞。

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