Causes of Steel Roof Leakage and Treatment Measures (2)

D.Waterproof layer aging

a.Cause

1, climatic conditions.
2, asphalt binder material heat-resistant too high.
3, asphalt binder material boiling quality.
4, the quality of the surface protection layer.

b.Treatment measures

1, local mild aging waterproof layer, can be partially repaired, eradicate the store new, and then paint a layer of asphalt on the entire roof waterproof layer, sprinkle mung bean sand.
2, serious to remove the aging surface layer in pieces, paving new surface layer. If scattered mung bean sand protective layer, asphalt binder material thickness 2 ~ 4mm, scattered grain size 3 ~ 5mm without angular mung bean sand, pavement before panning clean and heated to 80 ℃, while hot scattered sweeping with a light roller compaction.
3, better for asphalt concrete surface layer, available 1:1 gravel ratio mix (stone particle size 3 ~ 5mm), with boiling 170 ℃ dehydrated petroleum asphalt 10%, frying heat to maintain at 180 ℃ about 12 ~ 14min is ready; store on the linoleum surface layer, false pavement 15mm thick, compaction pat to 10mm thick, ironing so that the surface precipitation of oil can be.

E.Waterproof construction node improperly handled

a.Cause

1, mountain walls, daughter walls and protruding roof chimneys, risers and other walls and waterproofing layer intersection leakage. The reason or vertical surface coil and roofing coil is not well layered lap; or coil closure cracking so that rain from the crack into; or coil corner not made rounded, obtuse angle; or daughter wall and pressure top quality and cracking; or drip line is not done or not done.
2, gutter leaks its reason or gutter length is too large, longitudinal slope is too small; or rainwater mouth less, water fall pipe diameter is small, resulting in poor drainage; or rain bucket, gutter around coil paste is not firm; or because of rainwater mouth at the water bucket installation is too high, so that rainwater along the outside of the rain bucket into the interior.
3, the roof deformation joints improperly handled, such as tin cover installation is not firm, flooding height or slope is not appropriate, coil cover is not tight.
4, eaves, gable water leakage, is due to the gable mortar not pressed coil, sealing at the coil opening, gable mortar cracking and under the mouth of the drip line is not done.

b. Processing measures

1, when the daughter wall pressure top cracking, can remove the cracked pressure top mortar, re-plastering 1: 2 or 1: 25 cement mortar, and good drip line; conditions can be replaced with prefabricated reinforced concrete pressure top plate.
2, protruding roof chimneys, walls, risers, etc. and roofing intersection, corner made obtuse angle, vertical surface and roofing coil should be layered lap; for the parts that have been leaking, can be corner leakage at the coil cut, and layered old coil baked dry stripped, remove the old marsupial (SMA).
3, eave leakage, can be lifted up the old coil at the eave, with galvanized iron nailed to the eave, the new coil will be affixed to the iron.
4, rainwater leak seepage, can rain bucket around the coil eradication, check whether the short tube is close to the grass-roots plate surface or iron water plate. If the short pipe floating shelf on the leveling layer, the leveling layer will be chiseled off, remove the installation of a good short pipe, and then re-do the lap method three felt four oil waterproofing layer, the following to attach a layer of coil and a layer of recycled rubber linoleum, above the connection with the rainwater bucket to use asphalt marsupial (SMA) or grease embedded seams.