CN110080473A - A kind of flat roof waterproof heat-insulation system and its construction method - Google Patents
A kind of flat roof waterproof heat-insulation system and its construction method Download PDFInfo
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- CN110080473A CN110080473A CN201910367871.XA CN201910367871A CN110080473A CN 110080473 A CN110080473 A CN 110080473A CN 201910367871 A CN201910367871 A CN 201910367871A CN 110080473 A CN110080473 A CN 110080473A
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- waterproof
- drain bar
- flat roof
- insulation system
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000009413 insulation Methods 0.000 title claims description 19
- 239000010410 layer Substances 0.000 claims abstract description 120
- 229920001971 elastomer Polymers 0.000 claims abstract description 19
- 239000010426 asphalt Substances 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 239000011381 foam concrete Substances 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 12
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 5
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 2
- 238000004078 waterproofing Methods 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Building Environments (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of flat roof deck thermal-insulating waterproof systems, the first waterproof layer, air-permeable layer, insulating layer, second layer waterproof layer and finish coat including roofing construction sheet and from bottom to top, wherein the first waterproof layer is to be coated on the uncured rubber asphalt waterproof coating composite powerful of roofing construction sheet to intersect film adhesive waterproof coil；Air-permeable layer is using the air circulation layer provided among drain bar, convenient for the circulation of air and the evaporation of moisture；Foamed concrete can play heat preservation and part water-proof function for a long time, and surface layer directly carries out that slope is looked for smooth out, and save the working procedures such as sloping layer and screed-coat；The paving of second layer waterproof can play water-proof function on heat preservation sloping layer for a long time, reduce roof leakage probability, reduce heat preservation and waterproof maintaining expense.
Description
Technical field
Design building technical field of the present invention, and in particular to a kind of flat roof waterproof heat-insulation system and its construction method.
Background technique
Waterproof layer refers to protect indoor environment, avoids rainwater from penetrating into interior and causes mildew, leak, it is raw to influence people
Environment living, and the tectonic remnant basin being arranged.Insulating layer, be in order to avoid indoor environment absorb or dissipated heat, and be arranged construction
Level.Conventional waterproof is designed as positively fixed type waterproof, i.e., waterproof layer is arranged in top or the inversion type waterproof of insulating layer, i.e., will
The lower part of waterproof layer is arranged in insulating layer.All there is leakage probability height in both waterproofing designs, maintenance difficulty is big, and finding leak source is tired
The problems such as difficult.Insulating layer simultaneously, mostly uses prefabricated panels as insulating layer, can be with time change since intensity is low, and density adds
Greatly, heat insulation effect is gradually deteriorated, and foamed concrete insulating layer is then since once leaking, leak source is difficult to search, and moisture
Cannot exclude, cause to occur in maintenance process it is some denounce, while construction period, part water is easily stored inside insulating layer,
The moisture be mostly external natural precipitation, maintenance water and insulating layer itself institute band moisture and positively fixed type roof waterproof layer by
The percolating water for destroying and occurring, therefore, it is difficult to guarantee that waterproof layer and insulating layer can give full play to waterproof and heat insulation function, once
Maintenance will will cause waterproof and the whole of heat preservation destroys, and maintenance difficulty is big, and maintenance cost is high.
Therefore, against the above deficiency, present invention urgent need provides a kind of flat roof waterproof heat-insulation system.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind can simply and effectively play waterproof and heat insulation function for a long time
Roof system, be able to solve insulating layer inner aqueous or with age insulating layer increase in density and caused by insulation failure difficulty
Topic.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of flat roof waterproof heat-insulation system, which is characterized in that from below to up successively include roofing construction sheet, the first waterproof
Layer, the first separation layer, drain bar, insulating layer, the second waterproof layer, the second separation layer, concrete cover and finish coat, it is described
Insulating layer uses foamed concrete, and the convex surface of the drain bar is downward, the drain bar and first separation layer it
Between form air circulation layer.
Preferably, first waterproof layer intersects film self-adhesion with reinforcement power using uncured rubber asphalt waterproof coating and prevents
The compound construction of water coiled material.
Preferably, the drain bar bump height is not less than 12mm.
Preferably, first separation layer uses non-woven fabrics, grams requirement >=200g/ ㎡.
It is a kind of using the construction method, include the following steps:
The first waterproof layer is arranged in step a. on room panel structure layer, reinforces power using uncured rubber asphalt waterproof coating
Intersect the compound construction of film adhesive waterproof coil, rises to 150mm on roofing finish coat, uncured rubber-asphalt waterproof along parapet
Paint thickness requirement >=1.5mm, strength intersect film adhesive waterproof coil thickness requirement >=1.5mm or more；
Step b. is in the first waterproof layer top setting non-woven fabrics as the first separation layer, non-woven fabrics grams requirement >=200g/
㎡；
Drain bar is arranged on the first separation layer in step c., it is desirable that salient point is downward, and drain bar height of projection requires to reach
12mm or more, it is desirable that drain bar lap connection, to guarantee the globality of drain bar；
Step d. waits for that drain bar laying finishes, and pours foamed concrete, and foamed concrete thickness is arranged according to thermal requirements,
And it does surface layer and looks for slope levelling；
Step e. brushing blackbase inorganic agent promotes waterproof effect for increasing bond effect of the waterproof layer with base；
Step f. after surface layer is dry, can the second waterproof layer of paving, waterproof roll prevented using elastomer SBS modified pitch
Water waterproof coiled material coiled material, it is desirable that be higher by finish coat 250mm, lap width >=100mm；
Step g. is laid with non-woven fabrics as the second separation layer, is then laid with concrete cover and finish coat.
The invention discloses a kind of flat roof deck thermal-insulating waterproof systems, comprising: including roofing construction sheet and from bottom to top
One waterproof layer, air-permeable layer, insulating layer, second layer waterproof layer and finish coat, wherein the first waterproof layer is to be coated on roofing construction sheet
Uncured rubber asphalt waterproof coating composite powerful intersects film adhesive waterproof coil；Air-permeable layer is using the sky provided among drain bar
Air circulation layer, convenient for the circulation of air and the evaporation of moisture；Foamed concrete can play heat preservation and part water-proof function, face for a long time
Layer directly carries out that slope is looked for smooth out, and saves the working procedures such as sloping layer and screed-coat；The paving of second layer waterproof is on heat preservation sloping layer
Water-proof function can be played for a long time, reduces roof leakage probability, reduce heat preservation and waterproof maintaining expense.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Wherein, 1- roofing construction sheet；The first waterproof layer of 2-；The first separation layer of 3-；4- drain bar；5- air circulation layer；6-
Insulating layer；The second waterproof layer of 7-；The second separation layer of 8-；9- concrete cover；10- finish coat.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
As shown in Figure 1, a kind of flat roof waterproof heat-insulation system, is followed successively by roofing construction sheet 1, the first waterproof layer from below to up
2, the first separation layer 3, drain bar 4, insulating layer 6, the second waterproof layer 7, the second separation layer 8, concrete cover 9, finish coat 10.
Wherein insulating layer 6 uses foamed concrete, and the convex surface of drain bar is downward, is formed between drain bar 4 and the first separation layer 3 in this way
Air circulation layer 5, due to the special construction of drain bar, air circulation layer 5 is capable of forming several criss-cross channels, have
Fabulous air circulation performance, is connected to roof exhaust pipe.First waterproof layer 2 is reinforced using uncured rubber asphalt waterproof coating
Power intersects the compound construction of film adhesive waterproof coil, and leakage probability is low, and rises to 10 or more roofing finish coat along parapet
150mm, uncured rubber asphalt waterproof coating thickness requirement >=1.5mm, strength intersection film adhesive waterproof coil thickness requirement >=
More than 1.5mm.Wherein the first waterproof layer 2 is uncured rubber asphalt waterproof coating answering with strength intersection film adhesive waterproof coil
Waterproof system is closed, is bonded on roofing construction sheet 1；Air circulation layer 5 relies on drain bar 4, forms a large amount of raised support points, is formed
Air circulation plays the role of heat preservation and moisture evaporation；Insulating layer 6 is then kept the temperature and is looked for slope using foamed concrete, can be grown
Heat insulation function is played long；Second waterproof layer 7 is elastomer SBS modified asphalt waterproof coiled material of the paving on insulating layer 6.The present invention
Positively fixed type roofing and inverted roof are combined, and is provided with air circulation layer 5 and solves the problems, such as moisture draining, is examined simultaneously
The problems of the durability of thermal insulation material are considered；Secondly by uncured rubber-asphalt waterproof is arranged on roofing construction sheet 1
Coating, using uncured rubber asphalt croop property and in a heated state completely bond, solve waterproof layer and bonded not with basal plane
The problem of firm channeling water, while meeting strength and intersecting film adhesive waterproof coil, it is uncured using self-adhesion with uncured compatible feature
Coiled material lapping gap is effectively filled up, and strength intersects the frivolous easy to operate of film self-adhesion, can be applicable in the complexity of roofworks
Position of joints.
It is provided with air circulation layer 5 on the first separation layer 3, then is the high-strength and salient point that drain bar 4 is utilized, is formed empty
Air circulation layer, drain bar bump height require to reach 12mm or more, the main function of considering air circulation and store a small amount of water, once
Air circulation layer 5 is set, and vapor can evaporate under any natural conditions, be conducive to moisture and be discharged.
Insulating layer 6 is provided on drain bar 4, using foamed concrete light weight, good integrity, intensity height, durability
Well, the characteristics of easy construction, after being poured, and slope leveling is looked for, while playing heat insulation function for a long time, additionally it is possible to
Sloping layer and screed-coat are saved, the operation is more convenient.
Second waterproof layer 7 then uses elastomer SBS modified asphalt waterproof coiled material and has preferable endurance quality and resistance to height
Cryogenic property, it is easy to operate with a high credibility.
The second waterproof layer 7 is devised in view of once destroying the convenient problem of later period maintenance, while the second waterproof layer 7
By as the waterproof layer for contacting external water source first, once the second waterproof layer 7 destroys, the first waterproof layer 2 will continue to play waterproof
Function protects indoor waterproof safety.
It is as follows that the strength intersects film adhesive waterproof coil component list:
| Raw material components | Parts by weight |
| Pitch | 35-55 parts |
| Aromatic naphtha | 10-25 parts |
| SBS | 1-2 parts |
| SIS | 1-3 parts |
| SBR | 2-4 parts |
| Rubber powder | 5-15 parts |
| Terpene resin | 0.5-2 parts |
| C5 hydrogenation resin | 0.2-1.5 parts |
| Isobutene | 2-4 parts |
| Coumarone indene resin | 0.5-2 parts |
| Mineral powder | 17.5-50 parts |
Above-mentioned strength intersects the underwater tack time of film adhesive waterproof coil up to 8-15S, and adhesive speed faster, imitate by bonding
Fruit is more preferable, after the completion of construction, can complete with installation of membrane.
Insulating layer more than 6 belongs to porous structure, and air conduction coefficient when dry in gap is smaller, the thermally conductive system of still air
Number is 0.02, and after heat preservation dampness, thermal coefficient 0.5 increases 25 times than still air, when the moisture in material void is formed
Ice, the thermal coefficient of ice are 2.0, thermally conductive to be expanded to 100 times, even higher.
About exhaust level: the present invention then can be under water environment, for a long time using the combination of foamed concrete and drain bar
Play heat insulation function.
Foam concrete and other common materials insulating layer experiment characteristics tables are as follows:
The construction method of above-mentioned flat roof waterproof heat-insulation system is as follows:
The first waterproof layer is arranged in step a. on room panel structure layer, reinforces power using uncured rubber asphalt waterproof coating
Intersect the compound construction of film adhesive waterproof coil, leakage probability is low, and waterproof layer rises on roofing finish coat along parapet
150mm, uncured rubber asphalt waterproof coating thickness requirement >=1.5mm, strength intersection film adhesive waterproof coil thickness requirement >=
More than 1.5mm；
Step b. is in the first waterproof layer top setting non-woven fabrics as the first separation layer, non-woven fabrics grams requirement >=200g/
㎡；
Drain bar is arranged on the first separation layer in step c., it is desirable that salient point is downward, and drain bar height of projection requires to reach
12mm or more, it is desirable that drain bar lap connection, to guarantee the globality of drain bar；
Step d. waits for that drain bar laying finishes, and dismisses foamed concrete, and foamed concrete thickness is arranged according to thermal requirements,
And it does surface layer and looks for slope levelling；
Step e. brushing blackbase inorganic agent promotes waterproof effect for increasing bond effect of the waterproof layer with base；
Step f. after surface layer is dry, can the second waterproof layer of paving, waterproof roll prevented using elastomer SBS modified pitch
Water waterproof coiled material coiled material requires to be higher by finish coat 250mm, lap width >=100mm；
Step g. is laid with non-woven fabrics as the second separation layer, is then laid with concrete cover and finish coat.
Above-mentioned, although specific embodiments of the present invention have been described, not to the limit of the scope of the present invention
System, for some technology contents well known to those of ordinary skill in the art, details are not described herein again, and one of ordinary skill in the art answer
This understands that based on the technical solutions of the present invention, those skilled in the art do not need to make the creative labor and can make
Various modifications or changes still within protection scope of the present invention.
Claims (5)
1. a kind of flat roof waterproof heat-insulation system, which is characterized in that from below to up successively include roofing construction sheet, the first waterproof
Layer, the first separation layer, drain bar, insulating layer, the second waterproof layer, the second separation layer, concrete cover and finish coat, it is described
Insulating layer uses foamed concrete, and the convex surface of the drain bar is downward, the drain bar and first separation layer it
Between formed air circulation layer.
2. flat roof waterproof heat-insulation system according to claim 1, which is characterized in that first waterproof layer is using non-
Curing rubber asphalt waterproofing paint intersects the compound construction of film adhesive waterproof coil with power is reinforced.
3. flat roof waterproof heat-insulation system according to claim 1, which is characterized in that the drain bar bump height is not
Less than 12mm.
4. flat roof waterproof heat-insulation system according to claim 1, which is characterized in that first separation layer uses nothing
Woven fabric, grams >=200g/ ㎡.
5. a kind of construction method of flat roof waterproof heat-insulation system as described in claim 1, which is characterized in that including walking as follows
It is rapid:
The first waterproof layer is arranged in step a. on room panel structure layer, reinforces power using uncured rubber asphalt waterproof coating and intersects
The compound construction of film adhesive waterproof coil rises to 150mm on roofing finish coat, uncured rubber asphalt waterproof coating along parapet
Thickness >=1.5mm, strength intersect film adhesive waterproof coil thickness >=1.5mm or more；
Step b. is in the first waterproof layer top setting non-woven fabrics as the first separation layer, non-woven fabrics grams >=200g/ ㎡；
Drain bar is arranged on the first separation layer in step c., it is desirable that salient point is downward, several drain bar lap connections；
Step d. waits for that drain bar laying finishes, and pours foamed concrete；
Step e. brushing blackbase inorganic agent；
Step f. after surface layer is dry, can the second waterproof layer of paving, waterproof roll uses elastomer SBS modified asphalt waterproof
Waterproof coiled material coiled material is higher by finish coat 250mm, lap width >=100mm；
Step g. is laid with non-woven fabrics as the second separation layer, is then laid with concrete cover and finish coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367871.XA CN110080473B (en) | 2019-05-05 | 2019-05-05 | Flat roof waterproof and heat-insulating system and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367871.XA CN110080473B (en) | 2019-05-05 | 2019-05-05 | Flat roof waterproof and heat-insulating system and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110080473A true CN110080473A (en) | 2019-08-02 |
| CN110080473B CN110080473B (en) | 2021-02-12 |
Family
ID=67418621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910367871.XA Active CN110080473B (en) | 2019-05-05 | 2019-05-05 | Flat roof waterproof and heat-insulating system and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612267A (en) * | 2018-04-04 | 2018-10-02 | 上海三彩塑料排水板工程有限公司 | The method for eliminating water pressure using percolating water cross over pipe is blocked in roofing |
| CN111734054A (en) * | 2020-06-24 | 2020-10-02 | 南京市第八建筑安装工程有限公司 | Roof waterproof system and installation method thereof |
| CN112359986A (en) * | 2020-10-19 | 2021-02-12 | 四川省宏源防水工程有限公司 | Waterproof impervious structure and construction process thereof |
| CN115749156A (en) * | 2022-12-08 | 2023-03-07 | 中国十七冶集团有限公司 | Flat roof structure and construction method thereof |
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| JPH0533443A (en) * | 1991-08-02 | 1993-02-09 | Tajima Roofing Co Ltd | Structure of water proof roof eaves and waterproof gable roof |
| JPH07300953A (en) * | 1994-05-10 | 1995-11-14 | Asahi Chem Ind Co Ltd | Roof structure |
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| CN103087673A (en) * | 2013-02-28 | 2013-05-08 | 衡水中铁建土工材料制造有限公司 | Modified asphalt cold adhesive and preparation process thereof |
| CN103223747A (en) * | 2013-04-17 | 2013-07-31 | 锦州东方雨虹建筑材料有限责任公司 | Composite matrix based carrier modified asphalt self-adhesive waterproof coiled material |
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| CN108612267A (en) * | 2018-04-04 | 2018-10-02 | 上海三彩塑料排水板工程有限公司 | The method for eliminating water pressure using percolating water cross over pipe is blocked in roofing |
| CN111734054A (en) * | 2020-06-24 | 2020-10-02 | 南京市第八建筑安装工程有限公司 | Roof waterproof system and installation method thereof |
| CN112359986A (en) * | 2020-10-19 | 2021-02-12 | 四川省宏源防水工程有限公司 | Waterproof impervious structure and construction process thereof |
| CN115749156A (en) * | 2022-12-08 | 2023-03-07 | 中国十七冶集团有限公司 | Flat roof structure and construction method thereof |
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