Home > Technical info > Content

Synthetic Roofing Underlayment Precautions

Jul 03, 2017

The structural layer is basically the use of reinforced concrete cast-in-place roof. In the process to pay attention to the following matters.

(1) pouring concrete in addition to the process to ensure the strength, ratio, slump, but also to ensure the density of pouring. In the pouring of concrete in the process, only the use of vibration rod vibration is not enough, but also with the flat vibrator, so that the concrete can be vibrated castings, Synthetic Roofing Underlayment the cast plate within the cold joints and slits can be reduced. Vibrating dense concrete can play in a short time to prevent some of their own slight water seepage, the role of leakage.


(2) some out of the roof pipe hole reserved to ensure quality, it is best to use inverted cone form. PVC pipe through the floor, it is appropriate to use embedded interface accessories method.


(3) after pouring should be done in time to carry out conservation work.

worker93 (1).jpg

139184c2-bcd7-4458-945f-e9c580e32f4b.jpg

Whether the leveling design is reasonable,Synthetic Roofing Underlayment whether the construction quality meets the requirements, and the quality of the waterproof layer is greatly affected. Leveling layer construction should pay attention to the following matters.


(1) leveling layer Whether it is the use of cement mortar or fine stone concrete, with a reasonable ratio, which is to ensure its strength and stiffness of the foundation.


(2) leveling layer should be compacted, when the use of cement mortar leveling layer, the cement mortar should be double after the water pressure and full maintenance of light, Synthetic Roofing Underlayment no crisp, from the sand, from the skin phenomenon. When using fine stone concrete, can be incorporated in the fine stone concrete micro-expansion agent to improve the leveling layer of crack resistance.

(3) In order to reduce the cracking of the leveling layer, the roof leveling layer should be divided into sub-seam, cement mortar or fine stone concrete leveling layer spacing should not be greater than 6m; the use of asphalt mortar, the separation gap should not be greater than 4m.


(4) highlight the roof structure (parapet, wall, deformation joints, chimneys, etc.) and the junction of the roof, and the details of the node corner (water mouth, Synthetic Roofing Underlayment cornice, gutter, roof, etc.), should be made arc.


(5) laying roof insulation layer or waterproof layer before the grass-roots must be clean and dry. Simple degree of drying test method: 1 square meters of flat rolled sheet on the leveling layer, put it 3 ~ 4h after the open check, Synthetic Roofing Underlayment if the leveling layer covered with no watermark on the membrane, you can lay the steam layer or Waterproof layer.


The steam layer is located above the leveling layer, below the insulation layer, the purpose is to prevent the indoor water vapor penetration into the insulation layer, affecting the insulation effect. In the roof and the wall connection, the steam layer should be laid along the wall up, Synthetic Roofing Underlayment higher than the upper surface of the insulation layer 15cm, in order to tightly close the insulation layer, to prevent indoor water vapor into the purpose.


(1) the primary treatment agent brushing uniform, on the roof node, the surrounding, corner and other parts with a brush before the large surface brushing the primary treatment agent; base treatment agent, seams adhesives, sealing materials, etc. should be paved with the membrane Material compatible.


(2) before the construction should be clean the surface of the coil; hot paving the membrane, the mastic should be painted evenly, compaction, compact, to ensure that the membrane waterproof layer and the base of the bonding capacity.


(3) should not be in the rain, fog, snow, Synthetic Roofing Underlayment windy weather or environmental average temperature below 5 ℃ when the construction and to prevent grass-roots moisture.


(4) According to the use of buildings and climatic conditions to choose the appropriate waterproofing membrane and paving methods, on the road after the completion of the construction process should be checked, the side of the next process.


(5) before the large surface paving shop should be done before the node sealing treatment, additional layer and roof drainage more concentrated parts of the detailed structure treatment, sub-grid joints, etc., should be the lowest elevation from the roof construction; , Eaves girders, Yishun Gutter, Synthetic Roofing Underlayment eaves gutter direction of paving, from the water at the mouth of the direction of the water line paving, to minimize the lap.


(6) the upper and lower layers of film paving the direction should be correct, should not be perpendicular to each other paving. The joints of the two adjacent webs shall be offset from each other by more than 300 mm.


(7) laminated paving, the upper and lower layers of the joints between the joints should be staggered; laminated laying of the layers of the membrane, Synthetic Roofing Underlayment in the gutter and the roof of the connection should be taken to fork, lap joints should be Staggered; joints should stay in the ditch at the end, no slip slip, no Alice side.


(8) polymer modified asphalt waterproofing membrane and synthetic polymer waterproofing membrane of the joints, it is appropriate with the membrane performance compatible sealing material seal.


Roof waterproofing layer or steam layer construction, Synthetic Roofing Underlayment out of the roof of the pipeline, shaft and roof structure, are used flexible waterproof material to do the water, the height of not less than 250mm. Pipeline flooding is not less than 300mm, Synthetic Roofing Underlayment the last flood application of the membrane, and the use of hoop or press the coil will be pressed on the mouth, and then sealed with sealing material.