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Fireplace & Chimney Relining & Maintenance

Fireplace and Chimney Cleaning and Repair in Maryland

Chimney Lining/Relining

As defined by CSIA, a flue lining is intended to contain the combustion products, direct them to the outside atmosphere, and protect the chimney walls from heat and corrosion. While building code in different localities may vary on lining requirement the CSIA has recommended a flue liner since the beginning of the century and it is now required by most fire codes.

The lining of the flue services three main functions:

  1. Protecting the house from heat transfer to combustibles.

    With an unlined chimney heat can transfer so quickly to woodwork just beyond the masonry chimney structure and cause a chimney fire.
  2. Protecting the masonry from the corrosive byproducts of combustion.

    When flue gases penetrate the masonry structure, brick and mortar, it causes deuterations of the materials. When joints erode, the heat is able to transfer more quickly increasing the risk of chimney fire or other possibilities.
  3. Providing a correctly sized flue for optimum efficiency of appliances.

    Modern stoves or inserts have stated chimney requirements to perform at their most efficient ability. Having a properly sized flue will allow you to gain an efficient burn. Using a liner of inadequate size could lead to excessive creosote in wood-burning units and could lead to increased carbon monoxide output in gas or oil units.

Waterproofing

As the exterior of your chimney is faced with the varying weather elements, water leaks are possible. Water tends to travel the path of least resistance and can be difficult to pinpoint at times. Some common ways for water to leak inside the chimney are: no rain cap, cracks or voids in the chimney crown, and deteriorated mortar joints or compromised brick.

To act quickly on water issues, we keep various size rain caps stocked in our warehouse! We also carry sealant products such as CrownTite and Chimney Saver water repellent. The applied sealant acts as a barrier between the masonry surface and outside weather conditions.

For prefabricated chimneys we will inspect the integrity of the chase top flashing. Chase top flashings are made of metal and have a tendency to rust over the years and develop small holes for the water to pass through over time. If your chase top flashing needs to be replaced, we will take measurements of the chase and have a custom stainless-steel flashing made for your chimney. The stainless-steel replacement flashing will withstand years of weather and won't deteriorate or rust.

If water leaks are left untreated it can cause more sever issues later down the road. For masonry chimneys when the water seeps into the brick and freezes and thaws it will cause the brick to spall and the faces to pop off. Depending on the severity of the leak it can cause damage to your appliance or other interior structures.

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