Waterproofing chimney masonry after repairs in Shady Banks

Penetrating repellents and film formers

Clear masonry treatments fall into two broad families. Film formers sit on the surface as a continuous layer. Penetrants soak a short way into the brick and mortar and line the pores without forming a skin.

Brick industry guidance explains why the difference matters. A film can crack, cloud or trap moisture behind it, and trapped water can break the brick face. Penetrants tend to let vapor out more easily and resist sunlight better. For chimney masonry we recommend a penetrating repellent, and we explain the reason in plain words.

Covering glass, roof and garden before spraying

Repellents are made for masonry, and they should not land on anything else. Siloxanes and silanes can bond with unprotected glass. Overspray can mark roofing, metal, paint and cars, and it can harm plants below the chimney.

Before we start work at a home in Shady Banks, we cover or mask windows, skylights, roofing near the chimney and anything else in range. We ask you to move cars and outdoor furniture away from the chimney. Any overspray is cleaned promptly as the product instructions describe, and the area is left as we found it.

What the waterproofing estimate lists

A waterproofing estimate should show the full sequence, not just the coating. For a chimney in Shady Banks, ours sets out the following, with each repair on its own line.

Anything that could change the plan, such as an old coating found during the test, is noted with how it would be handled. Upfront pricing covers the listed items, and changes come to you before they happen.

• Repairs to finish first, such as joints, brick or the top
• Cleaning and the drying time before treatment
• The product named, and the faces it covers
• Protection for glass, roofing and plants

Metal parts at the chimney

A chimney carries metal: the cap, the flashing, straps and fasteners. A masonry repellent is not made for metal, and overspray can leave residue on it. Some metal surfaces are painted, and residue can mark the paint too.

We mask metal parts close to the faces being treated. If a metal part is rusting or loose, we note it, because a failing cap or flashing will need its own repair. The treatment is applied to the masonry only, as the product data intends.