16 Oct 2012
When is Lintel Replacement Necessary?
A lintel is a horizontal steel beam support placed over a wall opening to carry the weight of the masonry placed over it. In most situations, the lintel above your windows and doors will be steel angle iron, or I beam. Either due to age, improper rustproofing or weep chord and flashing placement during installation, lintels will begin to rust. Rusting lintels can expand to become much thicker then their original size. The expansive forces can shift structures. Diagonal “step” pattern cracks, which can be found on either end of the window or door opening, are a sign that your lintels are rusting.
In majority of situations, rusting lintels must be replaced.
Unfortunately, unless you go to the trouble of having the mortar custom made to match, the repair will stick out like a sore thumb forever. Hire a a professional tuckpointer for a perfect match.
What’s involved in lintel replacement?
The first step is to remove the bricks above the lintel. A replacement lintel should be installed that is galvanized to prevent rust. Proper flashing is also installed. Lastly the brick is reinstalled with weep holes above the flashing, allowing moisture to escape.
Custom mortar is well worth the wait, as it will ensure a seamless repair.
06 Oct 2012
Why Masonry Caulking Can Fail
Caulking provides an airtight, watertight seal between two materials. Polyurethane, butyl rubber and silicone caulks are specially formulated to ensure good adhesion on brick and other masonry services. But for various reasons, masonry caulking can fail, creating much more expensive repairs such as cracking, water and brick damage. While masonry caulking is designed to last about 20 years, both new buildings and old are susceptible to caulking problems. When the caulk is no longer adhering to both materials or is cracked, it’s a sure sign of failure.
Problem 1: Caulking Doesn’t Adhere
If the surfaces are not properly cleaned prior to the application, or joints are not cleaned out and tooled, the sealant may not adhere properly to the surfaces. Problems can emerge days, weeks or even months after the application.
Problem 2: Tears or Cracks in the Caulking
Poor joint design can result in tears within the caulk itself. Generally the design will call for a foam backer rod, or a specified ratio of width to thickness as well as proper tooling of the joints.
Problem 3: The Installer Misses a Spot
Caulking is subject to human error. Even a small break in the caulk can result in a leak.
Problem 4: Caulking Is Under Water
Constant exposure to water will cause caulking to fail prematurely. A professional tuckpointing contractor or building professional can diagnose structural issues which result from improper drainage. For example, a window sill or porch sloped the wrong way can keep caulking permanently wet.
Problem 5: Caulk Incompatibility
Sometimes different materials just don’t like each other. In certain situations, the caulk can react to another material that is present or to a substance used as a cleaner. It’s important to follow the manufacturer’s directions explicitly.
Because failures do occur, it’s important to check caulking regularly. And while caulking appears to be a simple task, the problems above demonstrate it can actually be quite complicated. A professional installation ensures the right materials, tools and techniques will be used to keep a tight seal for many years to come.
Not sure if you need new caulking? Give us a call.
12 Sep 2012
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10 Sep 2012
Chimney Leaks Check List
The best way to avoid chimney leaks is to do periodic preventive maintenance. In particular check the chimney crown, chimney flashing, and brick and mortar. These areas are vulnerable to leaks. Water or moisture can penetrate, causing problems inside the home, including mold.
When talking to a tuckpointer about chimney leaks you may be asked how old the chimney is, what materials were used to build the chimney and how it was constructed. These three variables can reveal potential problem areas. The average homeowner may not know the answers but with a physical inspection, a tuckpointer can find out quick enough.
Check chimney materials
☑ The chimney crown is often an area where leaks can occur, especially if it is made of mortar rather than concrete. Mortar is not as strong as concrete and can absorb water as it deteriorates over time.
☑ The kind of brick and mortar used in the chimney is also a factor. Soft, porous brick is more likely to leak. Mortar mixed with too much sand can actually soak up water. Water repellant products can limit the impact and prolong durability.
☑ Chimney flashing is used in the area where the chimney and roof line meet. Flashing requires two layers of sheet metal. One layer covers the sides of the chimney and the other is embedded in the mortar joints (counter flashing) then folded down for further protection against moisture.
Check chimney condition
☑ Look for crumbling or missing pieces on the chimney crown. Structural damage needs immediate attention. Small cracks in the crwn can often be repaired with a sealant.
☑ Rainfall can gather in the flashing area causing leaks through the joint. This can be repaired with a sealant and mesh fabric to make the joint stron enough to repel water.
☑ For large cracks in the brickwork, tuckpointing with new mortar is recommended.
Chimney leaks can cause damage to a home. Understanding the problem is the first step to keeping your Chicagoland home in good condition. Finding someone who can repair the problem is essential and prudent.
16 Aug 2012
Ivy on Brick – Is it a Concern?
In Chicago there are legendary homes, civic buildings, and even a baseball stadium beautified by ivy on brick. Chicagoans can’t imagine Wrigley Field or the University of Chicago without the ivy-covered walls. A lot of people like the look. Ivy can complement well-constructed and well-maintained brick walls. Still, there are some concerns about ivy growing on brick.
You should be concerned about ivy on brick if cracks appear, the mortar is crumbling, or brick is loose. Ivy leafs won’t cause damage but the roots growing in these vulnerable areas of the wall can expand cracks allowing water to penetrate the surface. I know one incident where the ivy opened a caulked crack in a foundation and water seeped in. Homes built before 1930 may be susceptible to damage because of the softer lime-based mortar used then. Mortar replacement or what’s called repointing, may be required.
Tuckpointing ivy covered brick requires removing or carefully pulling the ivy loose to apply a coating of cement-based mortar over existing joints. The ivy can then be repositioned or replanted. The ivy at Wrigley Field is Boston Ivy and Japanese Bittersweet. Bill Veeck planted it in 1937 during an outfield beautification project.
For your own beautification project keep the brick and mortar in good shape. The ivy won’t infiltrate a well-built, solid brick wall. If you have questions about tuckpointing your ivy covered brick walls in the Chicago metro area give me a call.