Old House Foundation Problems

Introduction

The concept of living in a house came after the ancient humans rejected living in caves, and felt the urge to construct something new as their living place.

Starting with natural construction materials such as stones, wood, we progressed to the era of building homes with long last construction materials such as bricks, cements, concrete.

In the beginning, the urge was just to about living in someplace safe from natural calamities, attacks from wild animals, but as humans grew their Architectural and aesthetic sense, we started seeing houses as objects of beauty.

Thus from the era of huts, which can be constructed haphazardly, with bare construction materials and just for living purposes; we came to the era of houses, constructed compactly utilising every bit of space, with long-lasting construction materials, not only just for living purpose, but an element of eye-pleasing as well.

Thus started from building on our own, we progressed to hire construction specialists for building our “dream homes”.

Old House Foundation

A house can be denoted as “Old”, when the house has been used extensively by some other people for more than 50 years. As technology upgrades, day by day, the type of construction and materials of construction is also getting updated day by day.

Thus like the older times, where people mostly used wood, stones and other construction materials for building houses, recent times enables people to use more structurally stable as well as environmentally friendly construction materials, a well-processed approach to use every bit of space, and structurally stable construction procedure, which permits the houses to live more without having any problems.

As a house becomes old, many types of problems related to the house started coming up eventually. Most of the problems are associated with the type of construction materials, as the materials used for constructing that house 50 years back, becomes mostly outdated due to the rapid changing of construction materials.

Along with construction materials, the type of construction also becomes outdated as the recent construction is found to be more structurally stable as compared with the past.

Due to nowadays rapid construction, the land requisition is one of the biggest problems a person will face while investing in a new home.

Due to scarcity of land, the government has enabled the apartment concept where a lot of families can stay in a particular piece of land, with the help of increasing verticality of the building.

At first, due to land issues, the government launched low-height apartments consisting of 2-3 floors, but as the issue became bigger, construction of large-height buildings started.

Nowadays, building heights can be increased to that extent which can accommodate a large number of families, having floor numbers of 50 or more.

Due to everyone’s different choices, some people choose to stay in the apartment as mentioned above. While others took the option of buying an old home and refurbishing it using modern technology.

Buying an old house can take a lot of factors, some of which have been described in the following:

The very first factor is the technology itself. The technology that was used for building the house 50 or more years back is practically extinct in the time the person is thinking of buying that house, is due to continual technological up-gradation.

So to refurbish that house, excellent structural choices have to be made by the owner to provide better technology without disturbing the house structurally.

Another factor is that, Construction materials that were used to build that house. Just like technology, building construction materials are continually getting improved, from short term usable construction materials, to long-lasting nature-friendly construction materials.

Thus to replace the older construction material with the newest one, the owner has to make sure the quality of the house improves with respect to both aesthetically as well as structurally.

There is the probability that the climate condition of the land might change within 50 years. Such as, the rainfall might increase or decrease, the water table gets increased or decreased.

Due to that the soil condition and the topography of the land might change as well. So one needs to consider it while buying an old house and implement additional structural support for it.

The biggest problem associated with buying an old house is the problem related to foundation. As with the age of the house, the foundation gets old as well. n addition to it, the type of foundation used at that time might be extinct as well, along with its construction material.

As the foundation is the root of the tree is called house, it takes the different it’s acting on the house, including dead load and live load, and distributing them the subsoil below it, its role is the most important one in building a house.

So to refurbish the foundation, the house owner needs to take extra care on the matter, not to disturb the house, as the foundation is the one that carries the house.

A slight error in the building or refurbishing the foundation might lead to a major accident, resulting in the complete demolition of the building as well.

Types, Materials & Methods of House Foundation

As already mentioned earlier, the foundation is a structural unit of a house, which carries all the loads acting upon the house and distributes evenly to the subsoil below it.

There are many factors on which choosing a type of foundation depends; some of them are:

• The topography of the land, or in other words, climate condition;
• Safe bearing capacity of the soil,
• Type of house, number of inhabitants on the house and the loads acting
• Construction materials available,
• Financial implications of the owner.

Depending upon such factors, the type of foundation can be classified as below:

1. Basement Foundation

The basement foundation is the one that consists of an underground floor of a house.

The basement foundation is mostly in use to European countries, which partially acts as a shelter from natural calamities, such as devastating tornadoes and tsunamis.

There are generally two types of basements; each is used for some specific purpose. They are as follows

Full Basement: Full basement is a type of basement, which is completely underground, and thus have no windows. They are generally constructed with the help of structural walls.

The structural walls are intended to resist the pressure of surrounding soils, which is generally constructed of concrete. Full Basement can be finished or unfinished depending upon the owners choice.

Finished full basements generally serve as living space area, whereas unfinished full basement serves as storage spaces for household equipment. Finished full basements consists of that much of a space to allow a person to stand in.

Daylight Basements: Often denoted as “English Basements”, Daylight basements are the basements which have parts of floors above the ground, and thus allowing windows to provide daylight, as the name indicates.

This type of basement can be witnessed in especially England. Many a time, daylight basements are constructed on slopes, allowing some portion to be projected above ground.

Daylight basements can be used for various purposes such as storage space, as a garage room, as maintenance room or as a living space. The buried portion can often be used for the laundry room or HVAC room.

Walkout basements: Walkout basements are the one generally daylight windows, which have a direct connection with above ground through stairwell or by any means.

This type of basements are partially underground which have direct access to the ground. Mostly used in hilly regions, due to its aesthetically pleasing architecture, significant value can be added to the house.

Sub-basement: Sub basement is one where an additional floor is added below the basement floor. Sub-basement can be used for storing water tanks or for pipelines, and electrical connections and is generally unusable for the living area.

2. Crawlspace Foundation

As the name indicates, a crawlspace foundation is a type of foundation that elevates from the ground level(by around 18 inches or more), and uses footing, concrete or structural walls, to provide adequate support to the house.

This type of foundation is mostly adopted in regions of hilly topographical areas, and also to where the amount of Rainfall is more.

The primary purpose for using a crawlspace foundation is that it protects the house, including its plinth, wall, and slab from the effects of moisture that might get stored up in the soil, thus allowing the protection of the house from the poor characteristics that might exist in the soil, by avoiding direct contact with it.

This type of foundation protects the house from the adverse effects of soil and is also less expensive than a full basement. Thus crawlspace foundation might be a good choice for medium-cost houses.

Crawlspace foundation is generally used for storing up general appliances of the house, thus many people consider it as a partial basement, but it can not be converted into a full basement, as it generally don’t accommodate the stand-in of a person.

3. Concrete Slab Foundation

One of the most common types of foundation is the Concrete Slab foundation, which can be called a grade Slab foundation as well.

The reason this type of foundation is chosen in most of the places is the strength that this type of foundation provides in the place where the soil does not give adequate bearing capacity.

The method for this type of construction is that a concrete slab of 150 millimetres or more width, Is supported on footing which might be underground.

This Slab, which is in direct contact with the soil, takes the loads from the building and evenly distributes them to the footings, further getting distributed to the subsoil below it.

Some of the major advantages of using this type of foundation is

• The major advantage of using this foundation is the strength that it provides irrespective of the soil type. Concrete attains strength with time, thus this foundation gets stronger along with its age.
• It evenly distributes the loads, that are getting applied to the ground floor, to the footings, and further to the subsoil. This avoided concentrated loads, and by uniformly distributing the loads, it protects the soils from having sheer failure.
• Concrete is the most common construction material nowadays. The reason for that is the strength it provides, regarding the low cost of the material. Also, due to being a very common material, the repair techniques available for concrete is widespread, which allows not to repair any sudden defects in the foundation, but also to attain its previous strength.

4. Wood Foundation

Mostly extinct nowadays, this type of foundation is constructed of moisture less wood, timber. Although this type of foundation have been stopped constructing, due to the availability of many various long-lasting materials available in the market.

This type of foundation can be used for a temporary house and can be very quick in erection. But it can not be used in permanent house due to its disadvantage in the presence of moisture and fire.

The most common materials being used for constructing the foundation are

Bricks: Mostly used in residential houses, bricks are a popular choice for constructing a low-cost foundation. Advantages of bricks include its less absorption of water which particularly helps it to lay having direct contact with soil. Also the strength it provides is very good.

Poured Concrete: As already mentioned previously, poured concrete is the most popular choice for construction nowadays. Although it has side effects on nature, but trials have been getting conducted to produce nature-friendly green and recyclable concrete.

Wood: Mostly extinct nowadays, using wood as a foundation material has been in the era before concrete was invented.

Precast Concrete Panels: Another one of the most used materials is precast concrete panels. This has been very much in use nowadays. It helps in the quick erection of the foundation within a short time, this allowing a foundation of a temporary structure.

Stone: One of the major advantages of using stone as a construction material is that stone neither absorbs the water not does it swell under any weather condition, thus can be indicated as impermeable material. So it can be used in places, having direct contact with soil.

Why Do Older Homes Have Foundation Issues?

One of the main issues associated with foundation is age. As the materials used 50 year’s back for constructing that foundation, due to adverse effects of soil, weather condition, being constantly under loads, and due to the application of impact or severe loads, the strength of that foundation has been reduced drastically.

Thus it will result in the sudden collapse of the house if no necessary action is being taken.

Due to the rapid advancements of modern technology in construction, the structural concepts have been described far better, which was absent 50 years back when that old house was constructed.

Thus due to the lack of structural as well as material knowledge, the foundation constructed often faces problems.

Common Problems Caused by Older Homes Foundation

Some common problems caused by an older homes foundation is as follows:

Roots of Tree: While a tree is cut, most of the time, the roots are left out pulling out. And for some large trees, the roots can extend to several meters beneath the ground, which is quite impossible to dig and pull out.

Thus as the roots are left out, they started growing in the presence of moisture which is getting plenty from the soil. Due to its slow growth, it might not be noticed at an early age, but with time it comes to the ground level eventually.

On that time, the strength of the foundation has been weakened due to age as well. So most of the time, it cracks the construction material(mostly concrete slab) and started growing within it. This is one major problem regarding a older house foundation.

Solution: When the tree is cut, it should be taken care of that the root does not extend up to the ground level. There are many chemicals in the modern market which ensures the stop of root growth.

Water Damage: Every problem regarding foundation, is partially or fully related to water. So to keep the house safe, one needs to ensure to keep liquid water, and moisture out of the house.

With increasing moisture, there might be signs of capillary cavities on the wall, which is a result of the permeability of the foundation.

Many a time, due to the absence of a surface drain, the water from the roof directly comes into the surrounding soil through a rainwater pipe, resulting in increases in the water table. Thus it increases the moisture of the soil, resulting into failure of the soil as well.

Solution: To keep the moisture out, one needs to leave sufficient space for the accumulation of water, sometimes a slope may be provided to keep water away from the foundation, To prevent water coming directly on soil, adequate surface drains should be provided which will lead to nearest storm water drains.

Cracks in Foundation: This type of defect is mostly observed in the concrete slab foundation. Due to inadequate curing or due to improper workmanship, hairline cracks in a foundation can be observed.

Many a time, it might occur due to the low bearing capacity of soil, resulting in uneven settlement of the foundation.

Solution: Proper workmanship and adequate curing should be done in the foundation to avoid hairline cracks. Moisture should have to keep out from the house to ensure a low water table, thus preventing uneven settlement of the foundation.

A slab leak can be a potential threat to an older house foundation as well. It is generally a pipe leak that occurs beneath the foundation of a home. To prevent it, waterproofing of the slab must be ensured.

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Frequently Asked Questions (FAQ)

Old House Foundation Problems

Old House Foundation Types

House Foundation Materials

How to Build House Foundation Step by Step?

What Is the Best Foundation for a House?

Because a slab is by far the most cost-effective choice, customers flock to this budget-friendly option. It’s quick and easy, as far as foundations go – a slab can often be poured directly on the ground or on a bed of gravel.

What Is the Strongest Foundation for a House?

Foundations are mostly constructed from strong material so they can hold the house in place even during earthquakes and cyclones. Therefore, they are generally made up of concrete which is the strongest construction material.

How to Tell What Type of Foundation a House Has?

One of the best ways to find out is to check if there is a crawl space beneath your home. While concrete slab foundation rests directly on the ground, the other types of foundations will have space between the ground and floor joists.

Bowing Walls in Old House