Soft flexible waterproofing technology is widely used in roof waterproof for a long time. Based on a comprehensive optimization of the advantages and disadvantages of the traditional flexible waterproofing roof, combining with the characteristics of steel structure roofing, Sanxin flexible waterproofing roof system is the launch of a new generation of flexible waterproofing roof. The system combines the metal roof panel, vapor barrier, thermal insulation layer, waterproof layer and special connecting fixed suite together of Sanxin’s own system, and forms a continuous compact structural layer, thus to achieve the goal of waterproof.

Sanxin flexible waterproofing roof has advantages of simple structure, convenient construction, long service life, durable, etc.

Moreover, it also has advantages of light self-weight, reasonable load-carrying capability, adaptable to deformation, low noise, energy saving, no pollution, low cost, etc.

Sanxin^® flexible waterproofing roof system can completely satisfy the requirement of the large span spatial structure roofing, which is widely used in large steel structure roofing projects such as industrial and civil buildings, public buildings, etc.

Sanxin flexible waterproofing features

The waterproof layer of Sanxin flexible waterproofing roof system adopts TPO waterproof coil material with excellent properties, and it combines the performance advantages of EPDM and PVC, with weather resistance ability, low temperature flexibility of the former and property of being welded of the latter. At the same time it has the properties of normal temperature high elasticity and high temperature plasticity. So this material has good processability and mechanical properties. And after adding a layer of polyester fiber fabric in the middle of the two layers of TPO materials, its physical performance can be further enhanced.

At the same time, TPO waterproof coil material also has the following features:

◆ Without plasticizer, with high flexibility, the brittle phenomenon of general polyolefin materials due to migration of plasticizer will not happen, and it can maintain long-term waterproof function. Construction can be carried out on damp roof, and protective layer is not needed for the exposure.

◆ With a layer of polyester fiber fabric stuffed in the middle, providing coil material high tensile properties, fatigue resistance, durability performance, suitable for mechanical fixed roof system. Excellent low temperature flexibility performance, it can still maintain flexibility at -40℃, and keeps the mechanical strength at high temperatures.

◆ Chemical resistance, resistance to acid, alkali, salt, animal oil, vegetable oil, lubricating oil corrosion, resistance to algae, mould and other microbial growth.

◆ Heat-proof aging, good size stability. Smooth surface, high reflectivity, excellent UV resistance, effect of energy saving and pollution resistant.

◆ Its composition does not contain chlorinated polymer or chlorine gas, without chlorine release in welding and use process, harmless to the environment and human health.

◆ Complete auxiliary materials and a variety of prefabricated parts, convenient construction, good system integrity;

◆ Coil material adopts hot air welding, seam with high peel strength, convenient and reliable for welding;

The properties of TPO waterproof coil material determine its excellent performances and extensive use in roof waterproof, cooperating with Sanxin’s other supporting structural layers and special connecting accessory, they make Sanxin flexible waterproofing roof system even more perfect.

 Construction methods

Construction methods of TPO waterproof coil material include: three methods of mechanical fixation method, full adhibiting method, border adhibiting method. Hot air welding process or special adhesive bonding is commonly used for seam.

Steel structure roofing adopts mechanical fixation method construction technology generally: fundamental plane cleaning→lay polyethylene film→lay thermal insulation layer→pre lay TPO waterproof coil material→fasteners fix TPO waterproof coil material→hot air welding TPO waterproof coil material→node location enhancement processing→inspection, repair→organize acceptance

TPO overlap and methods of detail fixation 

In order to ensure the integrity of coil material waterproof layer in the roof, one of the key points is the lap joint processing, through the hot welding to make adjacent coil lap joint forming bonding layer higher than coil strength, to form continuous sealing waterproof layer of whole coil material. The fixation ways of TPO coil material with the roof:

(1) Bedding face adopts the border adhibiting method with mechanical fixation way. That is the TPO coil material is laid in the basement layer by border adhibiting method; in adjacent lower coil material overlap area, fix with the basement layer by mechanical fastening screws and washers; overlap joint of the upper coil material with the lower coil material adopts hot air welding, to make coil material connected into a whole sealing waterproof layer.

(2) The coil material of the additional layer parts uses non-enhanced type, and it is required to use supporting adhesive glue for full sticking. Coil material in the elevation position can also use supporting adhesive glue for full sticking.

(3) As to coil material at the facade head parts, use mechanical fixation of metal bead, appropriate to embed water sealing material on basement before fixing, and seal with sealant finally.