Why a Dry Year Can Crack Maryland Foundations

Many homeowners connect basement trouble with rain. However, a long dry stretch can affect a house too. After weeks without much rain, some homeowners in Towson, Bel Air, and across the Baltimore area notice a new crack in a foundation wall or a door that no longer latches. Dry weather can play a part in that, because of the clay soil most Maryland homes sit on.

This guide explains how dry weather can affect a foundation, the signs of settlement worth watching, and how we diagnose a crack before recommending any repair.

How Does Maryland Clay Affect Your Foundation?

Maryland's Piedmont clay swells when it absorbs water and shrinks as it dries. Because this soil is common throughout the Baltimore area, Harford County, and much of central Maryland, seasonal wet and dry cycles can cause the soil beneath a home to move and gradually lose density.

During a long dry spell, the clay around a house may not shrink evenly. Maryland homes often settle at corners, near large trees whose roots draw moisture from the soil, and in areas built on fill soil that was never as dense as the native clay. If one part of the foundation settles while another stays put, cracks can form. That is foundation settlement.

What Are the Signs of Foundation Settlement?

Signs of foundation settlement often include new cracks, doors or windows that stick, or gaps that open around trim. None of these signs automatically means there is a serious problem, but they are reasons to take a closer look, especially if they are new or getting worse.

A few things you can look for around the house:

• Outside, look for stair step cracks in block or brick that run diagonally along the mortar joints. Masonry can crack along its mortar lines when one section of a wall settles relative to the section next to it.
• Inside, look for diagonal cracks running from the corners of door frames and windows.
• Try the doors and windows. Doors and windows that stick when they worked fine last year can be a sign that the frame has shifted.
• Look for gaps opening between trim and the ceiling, or between a chimney and the siding.

These checks can give you a general idea, but an inspection is how you learn whether settlement is behind what you are seeing.

Which Foundation Cracks Need Attention?

Not every foundation crack is a structural problem. A thin crack in poured concrete can come from normal shrinkage as the concrete cured and may stay the same for years, while a crack that is new, widening, or paired with other signs deserves a closer look.

Shrinkage cracks tend to be hairline width, run in no particular pattern, and show no displacement, which means one side of the crack is not higher than the other. Cracks that are more likely to need attention are the ones that are widening, run diagonally, step through masonry, let in water, or show up alongside the door and floor signs above.

Change over time matters. A crack that has been the same width and length for a decade is much less concerning than a crack that has grown noticeably in the past year.

When a small repair solves the problem, that is the repair we quote. Whether a house needs structural work, a smaller repair, or simply a follow up visit is what an inspection is for.

How Does Oriole Repair Foundation Cracks?

To repair foundation cracks that leak but are not moving, Oriole uses the Artery Method. We cut the crack into a V shaped groove, reinforce it with wire mesh, and rebuild it with hydraulic cement, so the repair is bonded into the wall itself.

Oriole developed the Artery Method in the mid 2000s for the way Maryland's clay soils behave. Each Artery Method foundation crack repair carries our lifetime transferable warranty.

What Happens When Rain Returns After a Drought?

When the rain returns, the clay takes on water and swells again. A crack that opened while the soil was dry can also become a path for water once the soil around the house is wet.

A follow up inspection, particularly at the end of a wet season versus a dry season, can confirm whether a crack is active or static. That comparison matters because the repair for a crack that has stopped moving can be different from the repair for a wall that is still shifting.

How Do You Get a Foundation Inspection in Maryland?

To get a foundation inspection in Maryland, call us at (410) 879-3360 or schedule a foundation inspection. We inspect, we show you what we found, we put it in writing, and we wait while you decide.

Every person on the job is an Oriole employee, trained by us and accountable to us. Oriole is the oldest waterproofing company in Maryland, working on Maryland homes since 1953, and we are licensed under MHIC #4247.

Frequently Asked Questions

Can a dry year cause foundation settlement in Maryland?

Maryland's Piedmont clay swells when it absorbs water and shrinks as it dries. Because this soil is common throughout the Baltimore area, Harford County, and much of central Maryland, seasonal wet and dry cycles can cause the soil beneath a home to move and gradually lose density.

Which foundation cracks need attention?

Not every foundation crack is a structural problem. A thin crack in poured concrete can come from normal shrinkage as the concrete cured and may stay the same for years, while a crack that is new, widening, or paired with other signs deserves a closer look.

What happens to a foundation when rain returns after a drought?

When the rain returns, the clay takes on water and swells again. A crack that opened while the soil was dry can also become a path for water once the soil around the house is wet.