Chimney Repair - leaking crownThe moust comon coses for chimney leaks is chimney crown.In most cases, the crown of the stack is made of concrete. The chimney crown protects the masonry from moisture. If the crown is made incorrectly, the chimney life becomes shorter, then you will have a chimney leak and an additional cost for the chimney repair.
The most common mistakes when installing the chimney crown: 1. If there is no reinforcement in the crown, there will be cracks and appear chimney leaks. 2. Crown without slope so the moisture accumulates on the stack and erosion develops on a crown stack. 3. A popular mistake when the crown without a drip edge. In this case, the water flow rinses the mortar and after a few years will need brick chimney repair. 4. Leaking in the crown-flue sealant. This chimney leak is particularly relevant in cold regions. Water penetration causes corrosion and damages the structure of the chimney from the inside. The corrosion process significantly increases at a minus temperature. In this case also will be required brick chimney repair. |
Chimney flashing repairIf the chimney flashing is made with a error, water will enters in the premises.The chimney flashing can be made of tin or lead sheets. The step flashing is useful on the tiling roof, in other cases it can be made of continuous flashings.
The chimney flashing-masonry node is very important and here the roofers are making mistakes. In this joint, the concrete needs to be cut about 20 mm. and seal with high-quality mortar, silicone is not suitable here. Recently, silicone is becoming very popular in roofing, but it is not suitable for roof sealing. The roof should be used for decades without any repairs, and with silicones you can solve the problem only for 2 years. Roofing is based on the principle of overlapping therefore most problems occur with roofing and chimney flashing when the slope of the roof is low. If your roof has complex knots and the slope is low then it's better to hire a professionals. |
Litle brick chimney repair or
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We do small chimney repairs and stock restoration.
We rebuild the crown of the stack and replace the damaged bricks, do the chimney step flashing. t. +44 7446 054800 |