CN102094522B

CN102094522B - Process for constructing joints between bottom of window on outer wall and inside as well as outside of windowsill

Info

Publication number: CN102094522B
Application number: CN2010105538830A
Authority: CN
Inventors: 张华飞
Original assignee: 1 ST CONSTRUCTION CO Ltd OF 22 MCC GROUP
Current assignee: 1 ST CONSTRUCTION CO Ltd OF 22 MCC GROUP
Priority date: 2010-11-19
Filing date: 2010-11-19
Publication date: 2012-08-15
Anticipated expiration: 2030-11-19
Also published as: CN102094522A

Abstract

The invention relates to a construction process, especially relates to a process for constructing joints between the bottom of a window on an outer wall and the inside as well as outside of a windowsill. The process provided by the invention comprises the following steps: on a windowsill at the outside of the bottom of the window, performing direct outward insulating base layer (consisting of cement mortar screeding layers) to falls, wherein the peak of a slope is arranged at the position 1/3 away from the inner edge of a window frame; filling the bottom of the external window frame with polyurethane foams; after the external window frame of a building is installed, inserting an XPS insulation board at the outside of the bottom of the window into the bottom of the window; and then foaming from the indoor. Because the peak of the slope is arranged at the position 1/3 away from the inner edge of the window frame, the infiltrating positions of sealants are gaps between the outer edges of the window frame and outside surface mortar, and the outer sides; a joint seam between an insulation board at the horizontal plane of the external windowsill and an insulation board at the vertical plane of the external windowsill is a horizontal joint seam; and the height of the inside (completely closed up) of the windowsill is 10 mm higher than the taken outside of the windowsill. The process provided by the invention can control the water leakage phenomenon of the windowsill of the external window of a building better under the premise of guaranteeing no thermal bridge occurs.

Description

The construction technology of junction, the outside in exterior wall window bottom and the windowsill

Technical field

The present invention relates to the construction technology of junction, the outside in a kind of exterior wall window bottom and the windowsill; Before belonging to external window of building and installing and the windowsill after installing bear down on one in the thin portion in outside joint construction method; Do not take place under the prerequisite of cold bridge problem in assurance; Major control external window of building windowsill drainage especially exists the external window of building effect of " nest water " particularly evident for architectural image.

Background technology

At present, external wall window bottom and junction, the interior outside of windowsill node have a variety of, as: 1,2/A8,2/A9, the 2/A10 among the 02J121-1 " external wall outer insulation architectural construction () "; 2, distant 2004J107 " EPS external thermal insulated wall body structure " 1/17,2/17; 3, the thin portion node in country such as 2/13,6/13 among the distant 2006J115 " ZL glue powder polyphenyl particle external thermal insulated wall body structure ", the provincial standard atlas; More than these nodes be suitable for the long period; Drainage and cold bridge phenomenon for junction, the outside in control exterior wall window bottom and the windowsill have played than positive effect.But in its concrete work progress, also exist a lot of problems need optimize solution.Mainly contain following some: (1) at present the lateral ledge of all nodes to look for the slope all be the plastering mortar that leans on the heat insulating material (EPS plate or XPS plate) or the heat insulating material outside.As looking for the slope with heat insulating material, all be the plane when marching into the arena owing to all heat insulating materials, there is not the gradient; As look for the slope then to need the on-the-spot secondary operations of workman with it; Influenced speed of application so at first greatly, the most important thing is to guarantee gradient uniformity because heat insulating material is softer; Not only influence attractive in appearancely, also increased the risk of leaking greatly.Plastering mortar as with the heat insulating material outside is looked for the slope, does not then more gear to actual circumstances, and too big if the gradient is looked for, then root and surperficial plastering mortar thickness increase, and plastering mortar very easily ftractures, and has become the hidden danger of leaking on the contrary; If instead it is too little that the gradient is looked for, then do not have the effect of looking for sloping draining; (2) the outer window frame bottom design in the GB atlas node is directly filling of heat insulating material (EPS plate or XPS plate); Because the objective factor in the characteristics of material itself and the construction; Greatly reduce the density of external window of building frame bottom, thereby increased the possibility of leaking with cold bridge.(3) though the Liao Dynasty marks on a map the outer window frame bottom design of collection in the node be polyurethane foam; But do not consider how better to improve the compactness and the swelling stress of foaming; Because during this node, the sequence of construction of employing is most engineerings in construction: the external window of building frame installs → beats all around that polyurethane foam → external window of building is inside and outside to close up, owing to steep front window in-out-snap both sides and have no and stop dismissing; So foaming is expanded to both sides, so can't better bring into play the compactness and the swelling stress of foaming.(4) sealing compound of all nodes (being that exterior window is played glue) is designed with two kinds of forms: 1, leave the slit between heat insulating material outside window and window frame, then sealing compound is squeezed into wherein.This kind method is very rare in construction; Because the at first bad control of gap width, next glue workman that fights each other has relatively high expectations, in case the big sealing compound short shot in slit or sealing compound can't get into the window bottommost; Fluid sealant is cracking in a single day, and windowsill leaks then unavoidable.2, sealing compound simultaneously contacts the window frame facade, and one side contacts plastering mortar.This kind method is more common in construction, is three kinds of different mediums because of sealing compound, plastering mortar, window frame still, and sealing compound very easily produces cracking phenomena on the contact surface of both sides, especially on the window frame facade.Because reusing that sealing compound occupies in the waterproof of window bottom is bigger, so this has also increased the risk that the window bottom leaks undoubtedly.(5) all atlas are not considered the seam of outside window sill horizontal plane warming plate and facade warming plate when the insulation node of design window bottom outside, are the risk that reduces to leak of maximum, and the seam between the two should be kept somewhere horizontal joint, rather than upright seam.(6) all atlas in design window bottom outside the time, do not take explicitly into account indoor and outdoor windowsill difference of height.

Summary of the invention

The present invention is intended to address the above problem, and can not take place under the prerequisite of cold bridge in assurance and provide a kind of, better controls the construction technology of exterior wall window bottom with the junction, the interior outside of windowsill of external window of building windowsill drainage.

The technical scheme that the present invention solves its technical problem employing is:

The construction technology of junction, the outside in a kind of exterior wall window bottom and the windowsill, carry out as follows:

(1) heat insulation base layer that on window bottom outside windowsill, is made up of the cement mortar floated coat is directly outwards looked for the slope, and gradient peak is retained in 1/3rd places apart from the window frame inner edge;

(2) outer window frame bottom filled polyurethane foaming;

(3) after the external window of building frame installs, earlier the XPS warming plate of window bottom outside is filled in the window bottom, afterwards again from indoor filled polyurethane foaming;

(4) because the peak of the gradient is retained in 1/3rd places apart from the window frame inner edge, the position that sealing compound is squeezed into is the slit and the outside that produces between the plastering mortar on the XPS warming plate of window frame outward flange and outside window sill horizontal plane;

(5) seam of outside window sill horizontal plane XPS warming plate and facade XPS warming plate is a horizontal joint;

(6) the windowsill inboard harvests the high 10mm of height after the aspect ratio outside behind the mouth becomes to live.

Compared with prior art, advantage of the present invention is:

(1) is employed on the window bottom outside windowsill and directly outwards looks for the slope, fundamentally avoided the problems of looking for the slope to produce with heat insulating material or plastering mortar by heat insulation base layer (being the cement mortar floated coat).In addition,, compare on the outer window frame limit, reduced the possibility of inside infiltration greatly with existing design grade peak because the peak of the gradient is retained in 1/3rd places apart from the window frame inner edge.Because this construction sequence can directly be accomplished in the work progress of external wall plastering, so improved efficiency of construction greatly, convenient construction has very high operability.

(2) filling for polyurethane foam of outer window frame bottom design so not only increased the density of frame bottom, and because polyurethane foam also belongs to heat insulating material, so avoided the window bottom that cold bridge takes place, so kept original theory of design.

(3) after the external window of building frame installs, earlier the heat insulating material (XPS plate) of window bottom outside is filled in the window bottom, afterwards again from the indoor bubble of dismissing, compare, better the compactness and the swelling stress of performance foaming with existing technology.

(4) because the peak of the gradient is retained in 1/3rd places apart from the window frame inner edge; So between window frame outward flange and outside plastering mortar, can leave certain slit; Sealing compound is squeezed into wherein; Sealing compound and frame bottom, facade and plastering mortar are in contact, have avoided because the harmful effect that the facade gaping of joints is just given birth to.

(5) seam of outside window sill horizontal plane warming plate and facade warming plate is a horizontal joint.So just the maximum risk that reduces to leak, and existing technology is not to providing clearly indication here.

(6) the windowsill inboard harvests the high 10mm of height after the aspect ratio outside after mouthful (cement mortar) becomes to live, and so just insures for preventing that windowsill from leaking and having added together, has atlas now for also not providing unified standard here.

Description of drawings

Fig. 1 is a process chart of the present invention.

Fig. 2 is the thin portion node sketch map of junction, the outside in exterior wall window bottom and the windowsill.

Among the figure: 1: 3 cement mortar screeding to falls floated coat 1; The thick XPS plate 2 of 30mm; Polyurethane foam 3; Plastering mortar 4; Sealing compound 5; Cement mortar closed up 6 in inboard 1: 3; External window of building frame 7; The concrete windowsill bears down on one 8; Exterior wall EPS warming plate 9.

The specific embodiment

Below in conjunction with Fig. 1 and by each main construction sequence connection detail that the construction sequencing is divided the present invention is detailed.

1, before 1: 3 cement mortar screeding to falls floated coat 1 of lateral ledge construction; Must 8 removing surfaces of bearing down on one of concrete windowsill are clean; And before plastering, also to bear down on one and 8 completely brush plain-water slurry one time at the concrete windowsill; As " interfacial agents " of floated coat and concrete base layer,, avoid the generation of the common fault of hollowing, cracking so that the two can better combine.

2, in 1: 3 cement mortar screeding to falls floated coat 1 engineering of construction lateral ledge; The most important thing is to control the position of the gradient and the indwelling of gradient highest point; Be that gradient highest point is 40mm, lowest part is 15mm, and gradient highest point should be retained in 1/3rd places apart from the window frame inner edge.Simultaneously both sides domatic should guarantee smooth, straight when construction.This construction sequence is the key of this construction technology, must can carry out next procedure by after professional's passed examination.

3, constructed behind 1: 3 cement mortar screeding to falls floated coat 1 of lateral ledge; Begin to install the external window of building frame; The key of this construction sequence is the distance of control window frame base apart from gradient peak (bottom floated coat), can not be less than 30mm, so that the thick XPS plate 2 of 30mm of step operation can be filled in smoothly down.Also to control well simultaneously " gradient highest point should be retained in 1/3rd places apart from the window frame inner edge " of one procedure.Because this procedure and next procedure meeting certain interval of time, frame bottom fixedly pulling-on piece is answered fixation, in order to avoid window frame produces displacement.

4, before the exterior-wall heat insulation construction, paste the thick XPS plate 2 of 30mm of outside window sill horizontal plane and facade earlier.The key of this construction sequence is: the thick XPS plate 2 of 30mm must be filled in outer window frame bottom (as shown in Figure 2); The seam of outside window sill horizontal plane XPS plate and facade XPS plate should be horizontal joint (as shown in Figure 2).This working procedure can be in office operation, so do not influence the working procedure of dismissing the closing in of bubble and interior wall in the inboard.

5, the intact back of 30mm XPS plate 2 paste Lists of lateral ledge is (according to the engineering quantity size; Can launch simultaneously with the indoor bubble of dismissing); Begin to carry out the indoor first pass plastering mortar 4 of beating polyurethane foam 3 and XPS plate surface; Construction relation before and after the two does not exist, the plastering mortar on XPS plate surface also can be with plastering mortar 4 constructions of the big metope of exterior-wall heat insulation.It is closely knit that the key of this construction sequence is that polyurethane foam 3 must be beaten, and polyurethane foam 3 must send the window frame inboard.

6, beat after polyurethane foam 3 construction finishes, treat that foaming reaches the design multiple after, begin to carry out inboard 1: 3 cement mortar of window and close up 6.The key of this construction sequence is in the process of cutting foaming, will drag foaming with hand scarcely, in order to avoid foaming can't be filled up a frame bottom, because quality of workers is lower at present, this step should be rigid in checking up.Simultaneously, inboard cement mortar should be eaten underframe 10mm in the closing in process, harvests the high 10mm of height after the aspect ratio outside after mouthful (cement mortar) becomes to live to guarantee the windowsill inboard.

7, after XPS plate plastering mortar 4 constructions of lateral ledge finish, should beat sealing compound 5 at external window of building frame 7 outside roots.The key of this construction sequence is: the position that sealing compound 5 is squeezed into is the slit and the outside that produces between external window of building frame 7 outward flanges and the outside plastering mortar, and especially sealing compound 5 must get in the slit.

8, treat that all process steps construction finishes after, should do at lateral ledge and continue the trickle experiment half an hour, quantity is 3% of outer window frame sum.Experimental result is not for after having the phenomenon of leaking, seep water, and the side is acceptance(check).

Claims

1. the construction technology of junction, the outside in exterior wall window bottom and the windowsill, carry out as follows:

(2) outer window frame bottom filled polyurethane foaming;