Sealing the joint with a ready-made apron-cap made of stainless metal

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All that remains is to lay the roofing material and attach the upper strips to the chimney with screws, and fill the sealing line with waterproofing mastic.

To ensure that the screws do not stand out against the roof, the color of their heads should be matched to the color of the roofing material.

Round Pipe Grooving: Metal Grooving
A ready-made apron-cap, represented by a metal sheet with a hole, closed by an inclined truncated cone, will help to seal a round chimney.

The sheet is attached to the lathing, the pipe is passed through the cap, the upper part of which is pressed against the chimney with a steel clamp with a heat-resistant gasket.
In order to direct the flow of water downwards, a border is made along the edge of the sheet using pliers and a hammer.
Interesting to know! An apron for a round chimney is made of black steel 1-3 mm thick. The metal is coated with heat-resistant enamel that can withstand heating up to 600 degrees. It is also possible to manufacture parts from stainless steel with a maximum thickness of 2 mm.


Sealing the junction of the roof and the pipe with the Master Flash system
Master Flash is an elastic penetration made in uganda mobile database form of a stepped pyramid with an aluminum or lead soft base. The design withstands a range of operating temperatures of 50°C (+ 130°C), and is easily adjusted to the steepness of the roof.


The installation of the elastic roof penetration unit is carried out in the following order:

Select a sealing ring with a gap 20% smaller than the diameter of the ventilation system.
The seal is pulled along the pipe, having first been moistened with a soap solution.
The cap is secured with sealant and screws equipped with neoprene or rubber gaskets. Step - 35 mm.
Important! Elastic penetrations with a flexible lead or aluminum ring are equipped with an adhesive layer located under the protective film. To enhance fixation, use additional adhesive composition.

The Master Flash chimney seal is convenient and easy to install

Aluminum and lead tapes
An alternative to ready-made penetrations is waterproofing the chimney with self-adhesive aluminum/lead tape based on bitumen or modified polymers. It allows sealing the joints of the pipe and the roof.