What’s the difference between settlement & subsidence?
Have you noticed some cracks in your home? Although this may be unsettling, in many cases, the cracks you see on the walls or plaster are a sign of natural building settlement, where your home gradually adjusts to its environment after construction. In some cases, however, similar signs can point to subsidence, which is a more serious problem concerning your property foundations. In this guide, we’ll explore the differences between settlement and subsidence, the warning signs and what steps you can take to protect your home.
What is building settlement?
Building settlement refers to the natural, downward movement of a property that occurs shortly after construction. It’s a normal process, with most houses experiencing minor settlement within the first 1-5 years after being built.
Common causes of settlement
Although natural settlement is common, it’s caused by several factors:
Natural soil compression – this is the main cause of settlement and is where the weight of a building compresses the soil underneath, forcing air and water out of the soil pores. This action is common in soft, compressible soils such as clay and silt.
Drying and shrinking of building materials – building materials such as concrete and plaster contain significant amounts of water. As they dry out in the first few years after construction, they shrink, causing cracking.
Thermal expansion and contraction – different building materials i.e. brick, timber, concrete etc, expand and contract at different rates. This is due to seasonal temperature changes. In summer, materials heat up and expand, and in winter, materials cool and contract. This cycle increase increases stress on the property, resulting in minor cracking.
What do settlement cracks look like?
Settlement cracks typically appear to be:
Hairline cracks
Thin vertical cracks in plaster
Cracks around windows and doors
Usually less than 2–3mm wide
What is subsidence?
Subsidence refers to the gradual downward movement of the ground beneath a building which causes its foundations to become unstable, and the property begins to sink. Typically, subsidence doesn’t happen overnight. It can take months or years for it to show any effects on a building.
Common causes of subsidence
Subsidence can occur for several reasons. Some of the typical causes of property subsidence in the UK include:
Clay soils – clay consists of 30-35% of water, so soils with a high clay content swell during periods of heavy rain and dry out during warm weather. This shrink-swell cycle causes the soil to expand and contract, forcing foundations to shift.
Tree roots extracting moisture – roots, particularly those of water-thirsty trees draw up moisture from the soil, causing the ground to dry out. The soil then shrinks, causing differential settlement.
Leaking drains softening soil – leaking or burst pipes can wash away fine particles of the underlying soil, causing the property’s foundation to subside. Escaping water can also soften supporting soil, reducing its ability to support the weight of the building.
Poor ground conditions – if the soil hasn't been properly compacted or the ground hasn’t been adequately filled, it may not have enough bearing capacity to support a property’s load, especially if the foundations are shallow.
Historic ground disturbance – if your property is built near to a former pit or quarry, then it could be unstable as the material used to fill the site will settle or shift as it decomposes.
What do subsidence cracks look like?
Subsidence cracks often start off small and worsen over time. Typical warning signs include:
Stepped cracks in brickwork
Cracks wider than 3mm
Cracks that continue to grow
Additional signs to look for include sticking doors and windows, and uneven or sloping floors.
Settlement vs subsidence: key differences
Understanding the differences between settlement and subsidence is vital in helping homeowners determine the next steps. Settlement is typically a natural and less serious occurrence. Subsidence on the other hand, suggests ground movement.
Feature | Settlement | Subsidence |
|---|---|---|
Cause | Natural building adjustment | Ground mvoement beneath foundations |
Timing | Often early in building life | Can occur at any time |
Crack size | Usually hairline | Often wider than 3mm |
Risk level | Usually cosmetic | May indicate structural movement |
In short, settlement is not typically a cause for concern, however, subsidence is typically linked to soil shrinkage, tree root damage or water-related issues, which require further investigation.
How to tell if cracks in your home are serious
If you notice cracks around your property, here’s a quick checklist to help you identify which ones could indicate structural movement:
Cracks wider than 3mm
Diagonal cracks across walls
Cracks that continue to lengthen and widen
If you notice any of these cracks, also look out for the following signs:
Uneven floors
Doors and windows sticking
What should you do if you suspect subsidence?
Remember, not all cracks mean there is a structural problem with your home. If you notice any cracks, you should:
Monitor the size of the crack over time
Take photos periodically
Seek professional advice if cracks worsen
If you’re concerned about any unusual cracks, you can arrange for a subsidence survey to identify potential ground movement.
Modern solutions for subsidence and foundation movement
If your property is experiencing subsidence, there are a range of methods to treat the problem. In some cases, traditional underpinning is required, however, modern ground engineering solutions offer a non-invasive alternative that effectively supports foundations without the need for extensive excavation or repair works.
One such methods is resin injection, which involves injecting expanding resin beneath the foundation to fill voids, compact loose soil, and restore stability. This approach offers:
Minimal disruption to the property
Requires no excavation
Can be completed in a matter of hours
Significantly strengthens the underlying soil
As specialists in non-invasive ground engineering solutions, Mainmark offers a range of methods designed to address cracked walls and foundation movement quickly and efficiently.
If you’re concerned about subsidence on your property, contact the team for a professional assessment.
FAQs
What is the difference between subsidence and settlement?
Subsidence is the gradual downward movement of the ground beneath a building, which causes the property to sink because the foundations have become unstable. Settlement refers to the natural adjustment a building typically goes through shortly after construction.
How wide should cracks be before I worry?
If cracks are wider than 3mm, then it could be a sign of ground movement or subsidence. You should seek professional advice to determine the cause.
Are settlement cracks normal in houses?
Yes, settlement cracks are normal in homes shortly after construction. They indicate that the property has naturally settled in its environment.
Can settlement cracks turn into subsidence?
Settlement cracks are usually a one-time occurrence following construction, however, if cracks grow over time, become wider than 3mm or appear suddenly, then it may be a subsidence issue.
Do subsidence cracks always get worse?
Subsidence cracks don’t always get worse, however, it can if the underlying cause of subsidence isn’t remedied. That’s why it’s important to treat the problem before it worsens.
Can subsidence be repaired without underpinning?
Yes, subsidence can be repaired without underpinning. In many cases, modern, non-invasive techniques such as resin injection and soil improvement can effectively strengthen the ground beneath the property with minimal disruption.
Mainmark’s specialised in-house solutions
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.
Get in Touch
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.
What’s the difference between settlement & subsidence?
Have you noticed some cracks in your home? Although this may be unsettling, in many cases, the cracks you see on the walls or plaster are a sign of natural building settlement, where your home gradually adjusts to its environment after construction. In some cases, however, similar signs can point to subsidence, which is a more serious problem concerning your property foundations. In this guide, we’ll explore the differences between settlement and subsidence, the warning signs and what steps you can take to protect your home.
What is building settlement?
Building settlement refers to the natural, downward movement of a property that occurs shortly after construction. It’s a normal process, with most houses experiencing minor settlement within the first 1-5 years after being built.
Common causes of settlement
Although natural settlement is common, it’s caused by several factors:
Natural soil compression – this is the main cause of settlement and is where the weight of a building compresses the soil underneath, forcing air and water out of the soil pores. This action is common in soft, compressible soils such as clay and silt.
Drying and shrinking of building materials – building materials such as concrete and plaster contain significant amounts of water. As they dry out in the first few years after construction, they shrink, causing cracking.
Thermal expansion and contraction – different building materials i.e. brick, timber, concrete etc, expand and contract at different rates. This is due to seasonal temperature changes. In summer, materials heat up and expand, and in winter, materials cool and contract. This cycle increase increases stress on the property, resulting in minor cracking.
What do settlement cracks look like?
Settlement cracks typically appear to be:
Hairline cracks
Thin vertical cracks in plaster
Cracks around windows and doors
Usually less than 2–3mm wide
What is subsidence?
Subsidence refers to the gradual downward movement of the ground beneath a building which causes its foundations to become unstable, and the property begins to sink. Typically, subsidence doesn’t happen overnight. It can take months or years for it to show any effects on a building.
Common causes of subsidence
Subsidence can occur for several reasons. Some of the typical causes of property subsidence in the UK include:
Clay soils – clay consists of 30-35% of water, so soils with a high clay content swell during periods of heavy rain and dry out during warm weather. This shrink-swell cycle causes the soil to expand and contract, forcing foundations to shift.
Tree roots extracting moisture – roots, particularly those of water-thirsty trees draw up moisture from the soil, causing the ground to dry out. The soil then shrinks, causing differential settlement.
Leaking drains softening soil – leaking or burst pipes can wash away fine particles of the underlying soil, causing the property’s foundation to subside. Escaping water can also soften supporting soil, reducing its ability to support the weight of the building.
Poor ground conditions – if the soil hasn't been properly compacted or the ground hasn’t been adequately filled, it may not have enough bearing capacity to support a property’s load, especially if the foundations are shallow.
Historic ground disturbance – if your property is built near to a former pit or quarry, then it could be unstable as the material used to fill the site will settle or shift as it decomposes.
What do subsidence cracks look like?
Subsidence cracks often start off small and worsen over time. Typical warning signs include:
Stepped cracks in brickwork
Cracks wider than 3mm
Cracks that continue to grow
Additional signs to look for include sticking doors and windows, and uneven or sloping floors.
Settlement vs subsidence: key differences
Understanding the differences between settlement and subsidence is vital in helping homeowners determine the next steps. Settlement is typically a natural and less serious occurrence. Subsidence on the other hand, suggests ground movement.
Feature | Settlement | Subsidence |
|---|---|---|
Cause | Natural building adjustment | Ground mvoement beneath foundations |
Timing | Often early in building life | Can occur at any time |
Crack size | Usually hairline | Often wider than 3mm |
Risk level | Usually cosmetic | May indicate structural movement |
In short, settlement is not typically a cause for concern, however, subsidence is typically linked to soil shrinkage, tree root damage or water-related issues, which require further investigation.
How to tell if cracks in your home are serious
If you notice cracks around your property, here’s a quick checklist to help you identify which ones could indicate structural movement:
Cracks wider than 3mm
Diagonal cracks across walls
Cracks that continue to lengthen and widen
If you notice any of these cracks, also look out for the following signs:
Uneven floors
Doors and windows sticking
What should you do if you suspect subsidence?
Remember, not all cracks mean there is a structural problem with your home. If you notice any cracks, you should:
Monitor the size of the crack over time
Take photos periodically
Seek professional advice if cracks worsen
If you’re concerned about any unusual cracks, you can arrange for a subsidence survey to identify potential ground movement.
Modern solutions for subsidence and foundation movement
If your property is experiencing subsidence, there are a range of methods to treat the problem. In some cases, traditional underpinning is required, however, modern ground engineering solutions offer a non-invasive alternative that effectively supports foundations without the need for extensive excavation or repair works.
One such methods is resin injection, which involves injecting expanding resin beneath the foundation to fill voids, compact loose soil, and restore stability. This approach offers:
Minimal disruption to the property
Requires no excavation
Can be completed in a matter of hours
Significantly strengthens the underlying soil
As specialists in non-invasive ground engineering solutions, Mainmark offers a range of methods designed to address cracked walls and foundation movement quickly and efficiently.
If you’re concerned about subsidence on your property, contact the team for a professional assessment.
FAQs
What is the difference between subsidence and settlement?
Subsidence is the gradual downward movement of the ground beneath a building, which causes the property to sink because the foundations have become unstable. Settlement refers to the natural adjustment a building typically goes through shortly after construction.
How wide should cracks be before I worry?
If cracks are wider than 3mm, then it could be a sign of ground movement or subsidence. You should seek professional advice to determine the cause.
Are settlement cracks normal in houses?
Yes, settlement cracks are normal in homes shortly after construction. They indicate that the property has naturally settled in its environment.
Can settlement cracks turn into subsidence?
Settlement cracks are usually a one-time occurrence following construction, however, if cracks grow over time, become wider than 3mm or appear suddenly, then it may be a subsidence issue.
Do subsidence cracks always get worse?
Subsidence cracks don’t always get worse, however, it can if the underlying cause of subsidence isn’t remedied. That’s why it’s important to treat the problem before it worsens.
Can subsidence be repaired without underpinning?
Yes, subsidence can be repaired without underpinning. In many cases, modern, non-invasive techniques such as resin injection and soil improvement can effectively strengthen the ground beneath the property with minimal disruption.
Mainmark’s specialised in-house solutions
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.
Get in Touch
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.
What’s the difference between settlement & subsidence?
Have you noticed some cracks in your home? Although this may be unsettling, in many cases, the cracks you see on the walls or plaster are a sign of natural building settlement, where your home gradually adjusts to its environment after construction. In some cases, however, similar signs can point to subsidence, which is a more serious problem concerning your property foundations. In this guide, we’ll explore the differences between settlement and subsidence, the warning signs and what steps you can take to protect your home.
What is building settlement?
Building settlement refers to the natural, downward movement of a property that occurs shortly after construction. It’s a normal process, with most houses experiencing minor settlement within the first 1-5 years after being built.
Common causes of settlement
Although natural settlement is common, it’s caused by several factors:
Natural soil compression – this is the main cause of settlement and is where the weight of a building compresses the soil underneath, forcing air and water out of the soil pores. This action is common in soft, compressible soils such as clay and silt.
Drying and shrinking of building materials – building materials such as concrete and plaster contain significant amounts of water. As they dry out in the first few years after construction, they shrink, causing cracking.
Thermal expansion and contraction – different building materials i.e. brick, timber, concrete etc, expand and contract at different rates. This is due to seasonal temperature changes. In summer, materials heat up and expand, and in winter, materials cool and contract. This cycle increase increases stress on the property, resulting in minor cracking.
What do settlement cracks look like?
Settlement cracks typically appear to be:
Hairline cracks
Thin vertical cracks in plaster
Cracks around windows and doors
Usually less than 2–3mm wide
What is subsidence?
Subsidence refers to the gradual downward movement of the ground beneath a building which causes its foundations to become unstable, and the property begins to sink. Typically, subsidence doesn’t happen overnight. It can take months or years for it to show any effects on a building.
Common causes of subsidence
Subsidence can occur for several reasons. Some of the typical causes of property subsidence in the UK include:
Clay soils – clay consists of 30-35% of water, so soils with a high clay content swell during periods of heavy rain and dry out during warm weather. This shrink-swell cycle causes the soil to expand and contract, forcing foundations to shift.
Tree roots extracting moisture – roots, particularly those of water-thirsty trees draw up moisture from the soil, causing the ground to dry out. The soil then shrinks, causing differential settlement.
Leaking drains softening soil – leaking or burst pipes can wash away fine particles of the underlying soil, causing the property’s foundation to subside. Escaping water can also soften supporting soil, reducing its ability to support the weight of the building.
Poor ground conditions – if the soil hasn't been properly compacted or the ground hasn’t been adequately filled, it may not have enough bearing capacity to support a property’s load, especially if the foundations are shallow.
Historic ground disturbance – if your property is built near to a former pit or quarry, then it could be unstable as the material used to fill the site will settle or shift as it decomposes.
What do subsidence cracks look like?
Subsidence cracks often start off small and worsen over time. Typical warning signs include:
Stepped cracks in brickwork
Cracks wider than 3mm
Cracks that continue to grow
Additional signs to look for include sticking doors and windows, and uneven or sloping floors.
Settlement vs subsidence: key differences
Understanding the differences between settlement and subsidence is vital in helping homeowners determine the next steps. Settlement is typically a natural and less serious occurrence. Subsidence on the other hand, suggests ground movement.
Feature | Settlement | Subsidence |
|---|---|---|
Cause | Natural building adjustment | Ground mvoement beneath foundations |
Timing | Often early in building life | Can occur at any time |
Crack size | Usually hairline | Often wider than 3mm |
Risk level | Usually cosmetic | May indicate structural movement |
In short, settlement is not typically a cause for concern, however, subsidence is typically linked to soil shrinkage, tree root damage or water-related issues, which require further investigation.
How to tell if cracks in your home are serious
If you notice cracks around your property, here’s a quick checklist to help you identify which ones could indicate structural movement:
Cracks wider than 3mm
Diagonal cracks across walls
Cracks that continue to lengthen and widen
If you notice any of these cracks, also look out for the following signs:
Uneven floors
Doors and windows sticking
What should you do if you suspect subsidence?
Remember, not all cracks mean there is a structural problem with your home. If you notice any cracks, you should:
Monitor the size of the crack over time
Take photos periodically
Seek professional advice if cracks worsen
If you’re concerned about any unusual cracks, you can arrange for a subsidence survey to identify potential ground movement.
Modern solutions for subsidence and foundation movement
If your property is experiencing subsidence, there are a range of methods to treat the problem. In some cases, traditional underpinning is required, however, modern ground engineering solutions offer a non-invasive alternative that effectively supports foundations without the need for extensive excavation or repair works.
One such methods is resin injection, which involves injecting expanding resin beneath the foundation to fill voids, compact loose soil, and restore stability. This approach offers:
Minimal disruption to the property
Requires no excavation
Can be completed in a matter of hours
Significantly strengthens the underlying soil
As specialists in non-invasive ground engineering solutions, Mainmark offers a range of methods designed to address cracked walls and foundation movement quickly and efficiently.
If you’re concerned about subsidence on your property, contact the team for a professional assessment.
FAQs
What is the difference between subsidence and settlement?
Subsidence is the gradual downward movement of the ground beneath a building, which causes the property to sink because the foundations have become unstable. Settlement refers to the natural adjustment a building typically goes through shortly after construction.
How wide should cracks be before I worry?
If cracks are wider than 3mm, then it could be a sign of ground movement or subsidence. You should seek professional advice to determine the cause.
Are settlement cracks normal in houses?
Yes, settlement cracks are normal in homes shortly after construction. They indicate that the property has naturally settled in its environment.
Can settlement cracks turn into subsidence?
Settlement cracks are usually a one-time occurrence following construction, however, if cracks grow over time, become wider than 3mm or appear suddenly, then it may be a subsidence issue.
Do subsidence cracks always get worse?
Subsidence cracks don’t always get worse, however, it can if the underlying cause of subsidence isn’t remedied. That’s why it’s important to treat the problem before it worsens.
Can subsidence be repaired without underpinning?
Yes, subsidence can be repaired without underpinning. In many cases, modern, non-invasive techniques such as resin injection and soil improvement can effectively strengthen the ground beneath the property with minimal disruption.
Mainmark’s specialised in-house solutions
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.
Get in Touch
Our dedicated team of experts is committed to understanding your unique needs and objectives, working closely with you to develop and execute.