CN109944398A - Plant vegetation roof waterproof construction and construction method - Google Patents

Plant vegetation roof waterproof construction and construction method Download PDF

Info

Publication number
CN109944398A
CN109944398A CN201910346327.7A CN201910346327A CN109944398A CN 109944398 A CN109944398 A CN 109944398A CN 201910346327 A CN201910346327 A CN 201910346327A CN 109944398 A CN109944398 A CN 109944398A
Authority
CN
China
Prior art keywords
waterproof
upside
waterproof roll
layer
construction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910346327.7A
Other languages
Chinese (zh)
Inventor
彭厚胜
谢福美
李辉强
葛桂琼
向阳阳
程亮
潘恒琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Fifth Engineering Bureau Co Ltd
Original Assignee
China Construction Fifth Engineering Bureau Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Construction Fifth Engineering Bureau Co Ltd filed Critical China Construction Fifth Engineering Bureau Co Ltd
Priority to CN201910346327.7A priority Critical patent/CN109944398A/en
Publication of CN109944398A publication Critical patent/CN109944398A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/254Roof garden systems; Roof coverings with high solar reflectance
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/32Roof garden systems

Abstract

The present invention gives a kind of plantation vegetation roof waterproof constructions;Common waterproof roll is on the upside of concrete floor; insulating layer is on the upside of common waterproof roll; root resistant waterproof roll is on the upside of insulating layer; protective layer is on the upside of root resistant waterproof roll; drainage blanket is on the upside of protective layer; filter layer is on the upside of drainage blanket, and planting soil layer can be laid on filter layer.With raising waterproof layer anti-leakage, secondary reparation and other effects.The present invention gives a kind of construction method for realizing above-mentioned plantation vegetation roof waterproof construction; the following steps are included: floor is smooth using waterproof mortar repairing or does screed-coat processing; common waterproof roll paving; insulating layer is laid on common waterproof roll; root-resistant puncturing type waterproof coiled material construction is laid with protective layer on root-resistant puncturing type waterproof roll, is laid with drainage blanket on the upside of protective layer; filter layer is laid on drainage blanket, flat roof deck carries out water-storing test.This method improves roof waterproof durability, reduces the cost that percolating water position is done over again.

Description

Plant vegetation roof waterproof construction and construction method
Technical field
The present invention relates to a kind of plantation vegetation roof waterproof constructions.
The invention further relates to a kind of construction methods for planting vegetation roof waterproof construction.
Background technique
Building engineering planted roof waterproof coiled material construction at present is in the following insulating layer of waterproof roll to concrete structure Between floor, then without other water proof structures, twice waterproof roll is arranged on insulating layer.This planted roof waterproof technology The shortcoming of construction mainly includes the following:
After the completion of waterproof coiled material construction, once there is local waterproof roll overlapping part sealing imprecision, or prevented In the work progress of water conservation layer, local waterproof roll is destroyed, and later period rainwater is caused to damage along coiled material and do not seal in place Insulating layer is penetrated at position.Because insulating layer is without the effect that blocks water, it will lead to rainwater big surface current in insulating layer and drop down diffusion, insulating layer top There is waterproof layer sealing, without effective drainage measure, will lead to rainwater and accumulate in insulating layer always, and is cumulative, insulating layer Following no waterproof layer inevitably results in roofing infiltration if slab in concrete structure has crack or hole.Roofing seepage point and volume Material breaking point may not will be unable to find the progress later period reparation of web breakage position according to roofing seepage point, only in same position Leakage point cannot can be blocked from the root by the weak part of maintenance roof structure floor.Roof leakage occurs for prior art The operation of waterproof can only be played when water by the concrete self-waterproof function of roof structure floor, maintenance activity can only be repeatedly to mixed Xtah Crude Clay structure floor carries out leak stopping processing, the expense that will be expended a large amount of finished product reparation, damaged facilities and equipment replacement.Bilayer is anti- Water coiled material be arranged on insulating layer, the local damage after coiled material aging, entire waterproof system will be unable to by sectional repair into Row is repaired, and the service life of planted roof waterproof system is caused to be greatly reduced.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of raising waterproof layer anti-leakage, secondary reparation and durabilities etc. The plantation vegetation roof waterproof construction of performance.
In order to solve the above technical problems, the present invention provides a kind of plantation vegetation roof waterproof constructions;
Including insulating layer, common waterproof roll, root resistant waterproof roll, protective layer, drainage blanket and filter layer;
Common waterproof roll is on the upside of concrete floor, and insulating layer is on the upside of common waterproof roll, and root-resistant puncturing is anti- Water coiled material is on the upside of insulating layer, and protective layer is on the upside of root resistant waterproof roll, and drainage blanket is on the upside of protective layer, filtering On the upside of drainage blanket, planting soil layer can be laid on filter layer layer.
As a preference of the present invention, being also equipped with screed-coat between common waterproof roll and concrete floor.
With such a structure, (one layer general by planted roof bilayer waterproof roll for this plantation vegetation roof waterproof construction Logical waterproof roll, a kind of root-resistant puncturing type waterproof roll) it is separately positioned on roof structure floor face and insulating layer, wherein resistance to It punctures waterproof roll to be arranged on insulating layer, for closing insulating layer, the rainwater that roofing is penetrated into is obstructed other than insulating layer, general Logical waterproof roll is arranged in roof structure floor face, for closing roof structure floor, compartment roofing structure floor and insulating layer, The rainwater that roofing penetrates into insulating layer is obstructed other than roof structure floor, as reliable dual waterproof measure, plain edition is anti- Water coiled material by with the strict combination of roof structure floor, even if coiled material locally occurs damaged, also there is only damaged part roofings Structure floor face has water stain, not will lead to the big face of roof structure surface layer and is immersed in water, causes a wide range of percolating water hidden danger.
In order to solve the above technical problems, realizing applying for above-mentioned plantation vegetation roof waterproof construction the present invention also provides a kind of Work method, comprising the following steps:
A) structure not less than 3% should be set on concrete floor look for slope, roof structure face is answered solid, smooth, clean, dry It is dry, the defects of no hollowing, cracking, dusting, if the hole, honeycomb or the pitted skin mass defect that have diameter to be greater than 0.5mm, chisel should be picked extremely Solid concrete layer is repaired smooth using waterproof mortar;
If body structure surface flatness is unsatisfactory for the requirement of waterproof matrix, making cement mortar levelling layer is needed to handle, screed-coat Thickness 20mm, surface layer should plaster press polish, conserve in time, and the fracture width of substrate surface is not more than 0.2mm, and must not penetrate through;
B) common waterproof roll paving, common waterproof roll more than base face should be guaranteed common using full bonding construction Tight, common waterproof roll overlap edge sealing is bonded between waterproof roll and roof structure floor or screed-coat, two width coiled materials are long Sealed width >=10cm of edge direction overlapping part, short side direction lap width >=15cm;
C) insulating layer is laid on the upside of common waterproof roll, insulating layer need to do leveling;
D) root-resistant puncturing type waterproof coiled material construction, root-resistant puncturing type waterproof roll are laid on the upside of insulating layer, root-resistant puncturing Waterproof roll should guarantee that waterproof roll and base's bonding are tight using full bonding construction, the sealing of coiled material lapping side, overlap edge sealing Width is not less than 10cm;
E) protective layer is laid on the upside of root-resistant puncturing type waterproof roll;
F) side is laid with drainage blanket on the protection layer;
G) filter layer is laid on the upside of drainage blanket;
H) flat roof deck should carry out 48h water-storing test, it is ensured that percolating water phenomenon do not occur after the completion of waterproof construction, complete Plant the construction of vegetation roof waterproof construction.
This realization plant the construction method of vegetation roof waterproof construction compared with prior art possessed by advantage and effect:
1, new process has not been changed the type of conventional waterproof material, only adjusts planted roof waterproof technology process, used Raw material are consistent with conventional Waterproof Construction Technique material therefor, with strong applicability.
2, the planted roof bilayer waterproof coiled material construction technique is not in the case where increasing raw material, by adjusting common anti- The paving position of water coiled material will greatly improve under general planting roofing bilayer waterproof coiled material construction technique insulating layer without waterproof structure The drawbacks of making will improve the ability of waterproof roll resistance percolating water to a certain extent.
3, a possibility that durability of raising roof waterproof system and breakthrough are once repaired in place, makes roof waterproof system Ability with reparation secondary after breakage.
4, reduce roof leakage water position do over again repairing caused by material and artificial consuming.Meet current building trade section It can lower consumption, the principle of guarantee construction quality.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the schematic diagram of this plantation vegetation roof waterproof construction embodiment.
Fig. 2 is the flow diagram of the construction method embodiment of this plantation vegetation roof waterproof construction.
Specific embodiment
As shown in Figure 1
This plantation vegetation roof waterproof construction includes insulating layer 4, screed-coat 2, common waterproof roll 3, root-resistant puncturing waterproof Coiled material 5, protective layer 6, drainage blanket 7 and filter layer 8.
Screed-coat 2 is in 1 upside of waterproof concrete floor slab, and common waterproof roll 3 is laid on 2 upside of screed-coat, common anti- Water coiled material 3 can select SBS modified asphalt waterproof coiled material, PVC waterproof roll, EPDM rubber waterproof rolling material or poly- Ethylene polypropylene fiber waterproof coiled material etc..
Insulating layer 4 is laid on 3 upside of common waterproof roll, insulating layer 4 can select extruded polystyrene board, rock-wool heat insulation plate or Expanded pearlite sillar etc..
Root resistant waterproof roll 5 is laid on 4 upside of insulating layer, and root resistant waterproof roll 5 can select the modified drip of SBS Green root resistant waterproof roll 5, polyvinyl chloride root resistant waterproof roll 5, EPDM root-resistant puncturing it is rubber water-proofing coiled or Polyethylene polypropylene root resistant waterproof roll 5 etc..
Protective layer 6 is laid on 5 upside of root resistant waterproof roll, and protective layer 6 can (interior arrangement of reinforcement be two-way for pea gravel concreten Φ6@200)。
Drainage blanket 7 is laid on 6 upside of protective layer, and the material of drainage blanket 7 is that concave-convex type arranges (storage) water plate, the draining of netted intertexture Plate, graded sand and stone or haydite etc..
Filter layer 8 is laid on 7 upside of drainage blanket, and filter layer 8 selects polyester non-woven fabric, and planting soil layer 9 can be laid on On filtering layer 8.
As shown in Figure 2
Realize the construction method of above-mentioned plantation vegetation roof waterproof construction, comprising the following steps:
A) base treatment:
The structure that concrete base layer should be arranged not less than 3% looks for slope, roof structure face answer it is solid, smooth, clean, dry, The defects of without hollowing, cracking, dusting, should pick chisel to heavily fortified point if there is the mass defects such as hole, honeycomb, pitted skin of the diameter greater than 0.5mm Real concrete layer, it is smooth using waterproof mortar (using microdilatancy water-tight concrete when defect is larger) repairing;
If body structure surface flatness is unsatisfactory for the requirement of waterproof matrix, making cement mortar levelling layer 2 is needed to handle, screed-coat 2 thickness 20mm, surface layer should plaster press polish, conserve in time, and the fracture width of substrate surface is not more than 0.2mm, and must not penetrate through;
Parapet, upper reversed beam, shear wall and planted roof handover position need to be smeared with cement mortar radius 50mm arc chord angle or 45 degree of chamferings.
B) 3 paving of common waterproof roll:
Common waterproof roll 3 more than base face should guarantee common waterproof roll 3 and roof structure using full bonding construction It is bonded between floor or screed-coat 2 tightly, common 3 overlap edge of waterproof roll is sealed using effective sealing means, two width coiled materials Sealed width >=10cm of longitudinal direction overlapping part, short side direction lap width >=15cm;
Modified asphalt waterproof coiled material, polymer membranes, self-adhering polymer modification bitumen waterproof can be selected in waterproof roll Coiled material etc.;
The positions such as parapet and Equipment Foundations waterproof roll turns over processing, turns over height not less than 250mm.
C) insulating layer 4 is laid with:
Insulating layer 4 is laid on the upside of common waterproof roll 3, insulating layer 4 need to do leveling.
D) root-resistant puncturing type waterproof coiled material construction:
Root resistant waterproof roll 5 should guarantee that waterproof roll and base's bonding are tight using full bonding construction.Coiled material lapping Side is sealed using effective sealing means, and overlap edge sealed width is not less than 10cm;
Root resistant waterproof roll 5 and 6 thickness of waterproof protective layer are selected referring to " planted roof architectural construction " (14J206) Atlas.Filter layer 8 and the construction of planting soil layer 9 are constructed according to Normal practice;
The positions such as parapet and Equipment Foundations waterproof roll turns over processing, turns over height and is not less than building finished surface or more 250mm。
E) 6 paving of protective layer:
Protective layer 6 is laid on the upside of root-resistant puncturing type waterproof roll.
F) drainage blanket 7 is laid with:
Drainage blanket 7 is laid on the upside of protective layer 6.
G) filter layer 8 is laid with:
Filter layer 8 is laid on the upside of drainage blanket 7.
H) closed-water test:
Flat roof deck should carry out 48h water-storing test, it is ensured that do not occur percolating water phenomenon after the completion of waterproof construction, complete kind Plant the construction of vegetation roof waterproof construction.
The construction method of this plantation vegetation roof waterproof construction should be avoided dislikes in strong wind, snowfall, rainfall, high temperature, low temperature etc. It constructs under bad weather, the control of construction period environment temperature is advisable between 5 DEG C~35 DEG C, must pay close attention to during waterproof coiled material construction Weather condition, selection are constructed under stable meteorological condition, when being in high temperature season and constructing during winter, should be carried out corresponding Seasonal construction measure.
Above-described is only one embodiment of the present invention, it is noted that for those of ordinary skill in the art For, without departing from the principle of the present invention, several variations and modifications can also be made, these also should be regarded as belonging to this hair Bright protection scope.

Claims (3)

1. a kind of plantation vegetation roof waterproof construction, it is characterized in that:
Including insulating layer, common waterproof roll, root resistant waterproof roll, protective layer, drainage blanket and filter layer;
Common waterproof roll is on the upside of concrete floor, and insulating layer is on the upside of common waterproof roll, root-resistant puncturing waterproof roll Material is on the upside of insulating layer, and protective layer is on the upside of root resistant waterproof roll, and drainage blanket is on the upside of protective layer, at filter layer On the upside of drainage blanket, planting soil layer can be laid on filter layer.
2. plantation vegetation roof waterproof construction according to claim 1, it is characterized in that:
Screed-coat is also equipped between the common waterproof roll and concrete floor.
3. a kind of realize the construction method for planting vegetation roof waterproof construction in claims 1 or 2, comprising the following steps:
A) structure not less than 3% should be set on concrete floor look for slope, roof structure face answer it is solid, smooth, clean, dry, The defects of without hollowing, cracking, dusting, should pick chisel to heavily fortified point if the hole, honeycomb or the pitted skin mass defect that have diameter to be greater than 0.5mm Real concrete layer is repaired smooth using waterproof mortar;
If body structure surface flatness is unsatisfactory for the requirement of waterproof matrix, making cement mortar levelling layer is needed to handle, screed-coat thickness 20mm, surface layer should plaster press polish, conserve in time, and the fracture width of substrate surface is not more than 0.2mm, and must not penetrate through;
B) common waterproof roll paving, common waterproof roll more than base face should guarantee common waterproof using full bonding construction Tight, common waterproof roll overlap edge sealing, two width coiled material long side sides are bonded between coiled material and roof structure floor or screed-coat To sealed width >=10cm of overlapping part, short side direction lap width >=15cm;
C) insulating layer is laid on the upside of common waterproof roll, insulating layer need to do leveling;
D) root-resistant puncturing type waterproof coiled material construction, root-resistant puncturing type waterproof roll are laid on the upside of insulating layer, root-resistant puncturing waterproof Coiled material should guarantee that waterproof roll and base's bonding are tight using full bonding construction, the sealing of coiled material lapping side, overlap edge sealed width Not less than 10cm;
E) protective layer is laid on the upside of root-resistant puncturing type waterproof roll;
F) side is laid with drainage blanket on the protection layer;
G) filter layer is laid on the upside of drainage blanket;
H) flat roof deck should carry out 48h water-storing test, it is ensured that do not occur percolating water phenomenon after the completion of waterproof construction, complete plantation The construction of vegetation roof waterproof construction.
CN201910346327.7A 2019-04-26 2019-04-26 Plant vegetation roof waterproof construction and construction method Pending CN109944398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910346327.7A CN109944398A (en) 2019-04-26 2019-04-26 Plant vegetation roof waterproof construction and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910346327.7A CN109944398A (en) 2019-04-26 2019-04-26 Plant vegetation roof waterproof construction and construction method

Publications (1)

Publication Number Publication Date
CN109944398A true CN109944398A (en) 2019-06-28

Family

ID=67016423

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910346327.7A Pending CN109944398A (en) 2019-04-26 2019-04-26 Plant vegetation roof waterproof construction and construction method

Country Status (1)

Country Link
CN (1) CN109944398A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112681624A (en) * 2020-12-21 2021-04-20 上海宝冶集团有限公司 Construction method of roof planted in independent basement
CN112763321A (en) * 2020-12-30 2021-05-07 江苏省建筑工程质量检测中心有限公司 Test box, waterproof coating root penetration resistance test method and application of test box in planted roof detection
CN113700226A (en) * 2020-05-20 2021-11-26 青岛绿建科技工程有限公司 Planting roof waterproof and drainage integrated system and construction process thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101250929A (en) * 2008-04-08 2008-08-27 新蒲建设集团有限公司 Planting roofing as well as construction method thereof
KR20110062730A (en) * 2009-12-04 2011-06-10 코오롱건설주식회사 Extensive green roof system and construction method
CN203531260U (en) * 2013-08-27 2014-04-09 中国建筑第二工程局有限公司 Inverted planting roofing structure
CN104120838A (en) * 2013-04-28 2014-10-29 杨哲 Planted roof waterproof construction method
CN105888146A (en) * 2016-04-27 2016-08-24 苏州市德威防水科技有限公司 Waterproof and heat-insulation structure of planting top plate
CN105888145A (en) * 2016-04-27 2016-08-24 苏州市德威防水科技有限公司 Planting deck waterproof structure
CN107060226A (en) * 2017-05-12 2017-08-18 武汉建工集团股份有限公司 A kind of construction method of planted roof construction
CN211037568U (en) * 2019-04-26 2020-07-17 中国建筑第五工程局有限公司 Plant vegetation roof waterproof construction

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101250929A (en) * 2008-04-08 2008-08-27 新蒲建设集团有限公司 Planting roofing as well as construction method thereof
KR20110062730A (en) * 2009-12-04 2011-06-10 코오롱건설주식회사 Extensive green roof system and construction method
CN104120838A (en) * 2013-04-28 2014-10-29 杨哲 Planted roof waterproof construction method
CN203531260U (en) * 2013-08-27 2014-04-09 中国建筑第二工程局有限公司 Inverted planting roofing structure
CN105888146A (en) * 2016-04-27 2016-08-24 苏州市德威防水科技有限公司 Waterproof and heat-insulation structure of planting top plate
CN105888145A (en) * 2016-04-27 2016-08-24 苏州市德威防水科技有限公司 Planting deck waterproof structure
CN107060226A (en) * 2017-05-12 2017-08-18 武汉建工集团股份有限公司 A kind of construction method of planted roof construction
CN211037568U (en) * 2019-04-26 2020-07-17 中国建筑第五工程局有限公司 Plant vegetation roof waterproof construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113700226A (en) * 2020-05-20 2021-11-26 青岛绿建科技工程有限公司 Planting roof waterproof and drainage integrated system and construction process thereof
CN112681624A (en) * 2020-12-21 2021-04-20 上海宝冶集团有限公司 Construction method of roof planted in independent basement
CN112763321A (en) * 2020-12-30 2021-05-07 江苏省建筑工程质量检测中心有限公司 Test box, waterproof coating root penetration resistance test method and application of test box in planted roof detection

Similar Documents

Publication Publication Date Title
CN107060226B (en) A kind of construction method of planted roof construction
CN109944398A (en) Plant vegetation roof waterproof construction and construction method
CN105201025B (en) Basement waterproofing construction and its construction method
CN205077733U (en) Waterproof roof boarding of flat roof deck
CN106401082B (en) A kind of planted roof discharge structure and construction method based on siphonic system
CN101545307A (en) Roof green insulation system and method thereof
CN206815693U (en) A kind of green planting roofing structure
CN111119416A (en) Planting roof and construction method
CN104153521A (en) Roof waterproof structure and roof maintenance method
CN114876117A (en) Multi-gradient planting roof structure and construction method thereof
CN207714054U (en) A kind of novel water permeable road
CN104652716B (en) Heat-insulating and waterproof system of planted roof and construction method thereof
CN112681624A (en) Construction method of roof planted in independent basement
CN205617555U (en) Roof root resistance waterproof construction is planted to basement
CN203373918U (en) Waterproofing work construction structure of pseudo-classic architecture roof cornice
CN211037568U (en) Plant vegetation roof waterproof construction
JP7114098B2 (en) Eco-friendly insulation structural blocks and structures
CN204475696U (en) A kind of severe cold area thermal-insulating water-proof roof
CN208396162U (en) A kind of thermal isolation by water storage roofing
CN212671027U (en) Leakage-proof structure for terrace roof
CN109296011A (en) Underground structrue engineering concrete structure seam waterproof construction technology
CN205046589U (en) Waterproof structure of basement
CN103572783B (en) Comprehensive method for preventing crack and water of basement project
CN103510699B (en) It is easy to the construction method of the close rib building roof of rainwater utilization
CN108166455A (en) A kind of construction method and structure of High-cold regions excavation channel anti-freeze expansion

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination