Author Archives: underpinning-adelaide

What is Underpinning and How Much Does It Cost?

Underpinning is the process of reinforcing and stabilising the foundation of an existing building. It is the construction of added support to strengthen a structure or footing. Underpinning supports the foundation of a property where the structure of it has changed due to moisture and other causes. Underpinning can also be done if the soil is not suitable for building construction.

The cost of underpinning varies depending on several factors. On average, the rate of foundation underpinning ranges from $5,000 to $35,000 for small and simple projects. In cases of major foundation repairs, underpinning services are about $40,000 to $80,000. Underpinning services can be costly, but they are necessary for structural integrity and overall safety.

When Do You Need Underpinning?

Underpinning is necessary when subsidence is actively occurring. Subsidence is the slow and steady sinking of the ground caused by human activities or natural processes. If not addressed promptly and adequately, it may pose a danger to people and property. It can also result in a drastic decline in property value.

Here are some indicative signs to check if your property needs underpinning.

#1. Misaligned Doors and Windows – Doors and windows out of alignment are an indicator of foundation problems. Doors and windows may lean and pull away from the frames, or there are wide gaps around them.

#2. Cracks on Walls and Floors – Minor hairline cracks are expected; however, more significant cracks mean bigger foundation problems. Observe the cracks for a few months and see if they are widening. If they are, you may need to contact a free underpinning assessment service.

#3. Floor is not Level – Unlevel floors are a tell-tale sign of foundation issues. Also, look for uneven trenches in the building or slab’s edge.

If there are worries after your initial assessment, it is always best to seek the advice of an underpinning specialist.

What are the Other Causes of a Foundation Failure?

#1. Drainage causes excess moisture that can lead to soil erosion and consolidation.

#2. Dry tree roots can also dry the soil under your property, causing it to shrink, thus damaging the foundations.

#3. Leaking pipes can cause soil erosion.

#4. Extreme heat conditions can lead to soil shrinking and can move your house foundations above it.

#5. Inadequately prepared soil compaction beneath your home may cause foundation damage.

Typical Cost for a Home Underpinning Work

The cost for underpinning typically depends on the extent of the damage. Below is a table with an estimate of how much is the cost for a home underpinning work across Australia – from repairing a simple crack to extensive foundation damage:
Unfortunately, most home insurance does not cover underpinning works citing home wear and tear as a homeowner’s responsibility. Still, it won’t hurt to ask if they allow financing as your payment option.

Factors Affecting Underpinning Cost

Computing the total cost for an underpinning project involves different factors. Some major factors affecting underpinning cost are the following.

#1. Extent of Damage

Assessment of the problem’s extent needs to be done before you can identify the cost for underpinning. The degree of foundation damage is the number one contributor to the total project price. The bigger the problem is, the more extensive workforce, time, and materials needed to complete the project.

#2. Cause of the Problem

The leading cause of foundation damage and other contributing factors generally affects the amount of time and equipment to use during underpinning. For instance, if tree roots cause it, you need specific equipment and machinery to do it. Same with the type of soil, water infiltration damage, or settlement problems.

#3. The Foundation Method

The building foundation impacts the underpinning solution and methods to be used. Depending on the damage assessment, a contractor may use any of these three underpinning methods: Slab Jacking, Piering, or Grout/Resin Injection. Each method has differing costs.

#4. Foundation Accessibility

Access issues are factors affecting the cost of an underpinning service. When foundation accessibility is limited, there are restrictions to the underpinning method, increasing the amount of time to complete the job. In some cases, special apparatus may be used to repair the damage.

#5. Underpinning Expertise

Embarking on an underpinning project involves several expert opinions for it to be efficiently and successfully completed. In most cases, a trade professional is involved and the expert advice and report of structural engineers, geotechnical engineers, and underpinning professionals.

It is essential to find experts and professionals to work with. You need to find a trusted Structural Restoration Service with qualified, reliable, and experienced tradespeople to get the most of your money.

How to Save on Underpinning Cost?

Underpinning is expensive and understandably so. However, there are some smart ways to avoid overcharges and unexpected increases in cost.

Typically, an underpinning service includes engineering fees and other miscellaneous costs. Still, there are some instances wherein you may incur extra costs. To avoid overcharges, you can ask your contractor to work on a fixed schedule. Discuss with your contractor how you want to proceed with the project and be transparent on your allotted cost and expectations.

Agree on a fixed time frame and total cost, ask for clarification and explain any concerns you may have regarding the project. The price for an underpinning service should be fixed and must include all the necessary expenses from soil tests, engineering reports, site inspections, and all the work and materials needed.

Contact at least 2 to 3 underpinning companies and ask for a free assessment, necessary information, and price quotation so that you can compare prices and services.

Do I Need a Structural Engineer?

An expert assessment by a structural engineer is needed for any underpinning project. Aside from giving professional advice, an engineer’s report is also necessary for you to get the required permit to proceed. Most structural restoration contractors have a structural engineer as part of their underpinning service package, so there’s no need for you to get a separate assessment. You can directly contact a contractor, and they are the ones to prepare everything for you.

Are There Other Alternatives?

Underpinning can be a costly and time-consuming process. If your home requires underpinning and you and your family are not yet ready, you may consider resin injections instead. Resin injection can compact loose soil and raise a structure to a standard level. It is also faster compared with other underpinning methods. Nonetheless, a structural engineer’s design and conditions are still required.

Will Underpinning Provide a Permanent Fix?

Depending on the soil where your property is in, as well as the type of underpinning method you choose, determine if your foundation problems can be permanently fixed or not. Experts in foundation underpinning give honest suggestions on what type of method is the best for your property.

Can I Underpin a House Myself?

Even if you work in the construction industry or have underpinning knowledge, it is best to let professional builders do the task. Underpinning is a complex process, and although resources and DIY instructions are readily available on the internet, doing it yourself can sabotage your home structure’s integrity.

We highly suggest working with a trusted building and underpinning specialist with years of experience to guarantee proven systems and quality work. If you are in Adelaide and within the South Australia area, we at Structural Restoration Services Pty Ltd can help you.

What Does Underpinning Entail?

Underpinning is a long process that would usually take about 4 weeks, depending on the damage. After the assessment, reports, and other preparation, your builder will either use machinery or manually dig holes beneath the existing foundation and fill it with concrete. They will then work on replacing and reinforcing existing structures as may be necessary.

Do I Need to Move Out While Underpinning is Ongoing?

In most cases, underpinning repairs and the general work involved is not disruptive. However, it can be messy.

Talk to your builders about how they would like to proceed. Some builders may suggest that you temporarily vacate your property while the work is ongoing. That way, you can plan and make reservations ahead of time.

Final Thoughts

Underpinning your property to ensure safety and building integrity is costly but is definitely worth it. One smart way to cut costs is to work only with an expert and trusted name in the structural restoration services.

Structural Restoration Services Pty Ltd  has more than 35 years of experience in working with South Australian homes. We understand your need to treat your home with love, care, and respect. We provide the best industry practice and workmanship and offer the best value and service in South Australia.

You can visit us at Unit 5/4 Trizolpic Ct., Lonsdale, South Australia, for free site assessments and quotes, or you can call (08) 8326 4477.

You may also check our website to get to know more about us and our services.

Related Blog Content:
What to Do if Your Floors Aren’t Level
Top 5 Reasons Why You Need Residential Underpinning
Guide to Understanding How Underpinning Can Help You

What to do if your Floors Aren’t Level

Many issues in the house can cause sloping or sagging floors and repairing them is not always easy. Deteriorating wood support, foundation issues, improperly installed sub-floors or joists and other issues can all cause the floors to be uneven and saggy. Fixing sloping floors is a lengthy and expensive operation. It can also be a challenge to find the right people to do this job. See why Structural Restoration Services is a preferred choice of residents of Lonsdale.

On many projects that I’ve taken, I’ve seen that older homes are particularly notorious for sagging and sloping floors.  In many cases, I’ve seen owners of the homes ignore the issues and treat them as part of owning an aging house. Though you might argue that a sloping floor might bring out the character of the house, there can be some other, more serious underlying issues to an uneven floor. This is why it is a good idea to have a professional come and evaluate the state of the floor in your house and recommend what might need to be done. Give us a call at (08) 8326 4477 to schedule a visit.

Identify the Root Cause

You might want to consider hiring a structural engineer to diagnose the problem, unless you trust a contractor to be able to identify the problem. The diagnosis is very important as it can end up being a very expensive job. Hiring a structural engineer will help because they will not have anything to do with the actual repair work and therefore will give a more honest assessment. They will also be in a better position to give you advice on the type of contractor that will be best suited to do the job. It might be that certain contractors might only be specialists in specific kinds of repair work.

Fix a Sloping Floor

In case a professional has identified that the cause of the uneven floor is something that will compromise the integrity of the entire house, you might be able to fix the underlying root cause and leave the rest of the floor as is. However, if the uneven or sloping floor is too severe to be ignored, fixing it will need to be your priority. Foundation specialists like us will always repair the structural problems first and then look at mending the uneven or sloping floor.

This can involve jacking up the floor joists and then installing supports or it can also just require jacking up the entire house and installing new footers. Jacking up the house can take some considerable amount of time. This is why you will need to plan in advance if you want to avoid any structural damage from happening.

In case your sloping floor is because of the floor being installed improperly, you might be able to have a new floor installed in place of the existing one. I’ve had customers who also had to have a new subfloor installed to create a new moisture seal. This is common in older homes with deteriorating support systems under the floor.

Any floor job can be complex, which is why I recommend you getting in touch with us for a free assessment. We will thoroughly inspect the issue and give you an honest recommendation on the best approach to fix an unlevelled floor.

Top 5 Reasons Why You Need Residential Underpinning

Who wouldn’t want their home to last for as many years as possible? After all, a home is a safe place where most people live the longest. However, many people forget that our houses are held upon by their foundations, which makes the structural integrity of the house extremely important. If the foundation suffers damage, the whole structure is affected, and that’s where the underpinning process comes in. But why is underpinning so important?

Here are our top 5 reasons why you need residential underpinning!

Signs of Foundation Problems

When there are visible signs of issues with the foundation, you might need underpinning.

Some of the signs to look out for include unlevel floors, gaps appearing or getting bigger around the doors and windows, and cracks in the walls. 


Subsidence is when an area of soil begins to sink and as a result, causes shifting underneath the house. This can lead to significant damage to the foundation and structural problems. Underpinning will strengthen the foundation and help combat the impact of the subsidence.

Remodelling Your Home

If you have recently remodelled your home or you’re considering doing it, the house might require underpinning. That’s because extra weight can stress the foundation, especially if you want to add an extra floor. If the foundation is strong, adding an additional floor will not do any damage. However, if it’s already damaged and you’re unaware of it, you can face serious problems. This is why underpinning is always recommended before building a new floor or doing any major remodelling.

Natural Disasters

If you are living in a place that is affected by natural disasters such as earthquakes and floods, you are always at higher risk of having foundation problems. Your structure can be moved or require stabilisation of the foundation soils and footings. You will need underpinning to protect yourself and your home.

Structural Restoration Services offers underpinning and structural restoration services in Adelaide, South Australia. With over 35 years of experience, you can be sure you’re in good hands.

Request a free quote by filling in this form or call us today at (08) 8326 4477 for expert advice and faster transactions!

What to do when your concrete cracks

If you own a house you are always learning something new. You may notice some cracks in the concrete that weren’t there before. While a small crack may not be too alarming, it could eventually turn into a bigger issue.

Though it may be nothing, a crack in the concrete may be worth checking out to ensure that there is no serious damage or that the damage does not reach the foundation of your house. This is when you should contact a reputable concrete repair company like Underpinning Adelaide. This company consists of licensed, qualified structural engineers who can easily tell if your cracked concrete can cause bigger issues and can also easily fix them.

How Can They Fix Cracked Concrete?

The term you will hear being used to repair your concrete is “underpinning”. This is a process that construction companies use to help buildings become and remain more stable. Essentially, Underpinning Adelaide will dig new holes to hold concrete piers that are around 2 to 3 meters. Once these are in place, these are reinforced with reinforcing rods or bars and then filled with concrete.

If your concrete is cracked, don’t let the situation get out of hand. Call Underpinning Adelaide right away and have them reinforce your concrete all around. While cracked concrete might not seem like much, it could end up being a much more serious issue if left alone. Prevent any further damages by allowing Underpinning Adelaide to help.

Contact our professional concrete repair team today and let them fix your concrete cracks today before they spread and cause more damage to your foundation and surrounding areas.

Call Today

(08) 8326 4477

Unit 5/4 Trizolpic Ct, Lonsdale, South Australia 5160

Guide to Understanding How Underpinning Can Help You

Any structural imperfections in your home are a cause for concern. They are an indicator of weaknesses in the structure and unstable ground conditions. When they become visible, so do your concerns. 

Underpinning is not the solution in all cases – it depends on the causes and local conditions, but once our inspection team confirms that it’s the best option, what then?

Our job is to solve these problems, and the good news is that as a highly professional outfit we can get the job done. So, just what are the benefits for you and your home?

Benefits of Underpinning for Your Home

  • Preserves structural integrity of the building. Underpinning shores up the solidity of your structure, making it solid and resistant.
  • As an additional plus, the process provides access to other infrastructure which may be in need of maintenance, such as plumbing, sewage, and wiring. 
  • At the same time, you may have an opportunity to upgrade to a more efficient and cost-effective infrastructure, such as insulation.
  • Another benefit is that by underpinning the foundations of the home, you’re allowing for a total survey and diagnosis of the situation. I know it can be upsetting to find cracks, warps and flaws in your home but believe me, it’s best to get to the bottom of things, literally, as soon as possible.
  • Ultimately what we provide, apart from strong foundations is peace of mind into the future. It may seem daunting but the best way to ease your own concerns is to hire the best technicians and engineers available. And that’s where we come in. Rest assured that our projects will secure your family’s home and add value to your property.

That way we can step in and secure your investment, and most importantly of all, secure peace of mind for you and your family. Underpinning is a big job so we commit to making sure it’s a once in a lifetime job. Once we’ve done our job, you’re set for good. And that’s a promise!

Looking for more info or need help with your underpinning project? Call us on (08) 8326 4477.