Engineer Reports for Wall Cracks & Subsidence - What Do I get

Engineer Reports for Wall Cracks & Subsidence - What Do I get?

This is a common question we get from clients looking to book a structural engineer inspection. At Forensic Engineers, rest assured, we always do a thorough investigation for any signs of subsidence and building movements.

๐—” ๐—ง๐˜†๐—ฝ๐—ถ๐—ฐ๐—ฎ๐—น ๐—–๐—ฎ๐˜€๐—ฒ, ๐—›๐—ผ๐˜‚๐˜€๐—ฒ ๐—™๐—ผ๐—ฟ ๐—ฆ๐—ฎ๐—น๐—ฒ; ๐—ฆ๐—ฝ๐—ฟ๐—ถ๐—ป๐—ด๐—ณ๐—ถ๐—ฒ๐—น๐—ฑ ๐—Ÿ๐—ฎ๐—ธ๐—ฒ๐˜€

Just recently we inspected a house For Sale at Springfield Lakes for a buyer.
The building & Pest Report had identified a few small brick wall cracks & some slope in the floor that did not appear to be too serious, but just to be safe, he recommended that the buyer contacted Forensic Engineers to do an inspection and report.

๐™๐™๐™ž๐™จ ๐™ž๐™จ ๐™–๐™ฃ ๐™š๐™ญ๐™ฉ๐™ง๐™–๐™˜๐™ฉ ๐™›๐™ง๐™ค๐™ข ๐™ค๐™ช๐™ง ๐™Ž๐™ฉ๐™ง๐™ช๐™˜๐™ฉ๐™ช๐™ง๐™–๐™ก ๐™€๐™ฃ๐™œ๐™ž๐™ฃ๐™š๐™š๐™ง ๐™๐™š๐™ฅ๐™ค๐™ง๐™ฉ ๐™ž๐™ฃ ๐™ฉ๐™๐™ž๐™จ ๐™˜๐™–๐™จ๐™š;

๐Ÿฏ.๐Ÿญ ๐—˜๐˜…๐˜๐—ฒ๐—ฟ๐—ถ๐—ผ๐—ฟ

  • Left side wall โ€œbendingโ€
  • Bed 1 front wall, partial rendering done
  • Garage left entry gap
  • Bath wall cracks & window reveal gap
  • Bed 3 wall cracks & window reveal gap
  • Kitchen wall crack
  • Rear patio column lean
  • Rear patio slab settlements of the rear-left corner & cracks
  • Dining/living wall corner crack filled
  • Living window reveal gap
  • West wall window reveal gaps filled
  • Living wall crack
  • Bed 2 wall cracks under sill
  • Bed 2/garage wall corner crack filled
  • Garage rear wall crack over door
  • Widespread variations in mortar shades

๐Ÿฏ.๐Ÿฎ ๐—œ๐—ป๐˜๐—ฒ๐—ฟ๐—ถ๐—ผ๐—ฟ

  • Garage floor slab cracks & west edge slab dampness
  • Hallway/toilet ceiling cornice cracks
  • Hallway/bed 2 ceiling cornice crack
  • Living window architrave tension gaps

๐Ÿฐ.๐Ÿฌ ๐—™๐—Ÿ๐—ข๐—ข๐—ฅ ๐—Ÿ๐—˜๐—ฉ๐—˜๐—Ÿ๐—ฆ

*Test locations are approximate. Carpet & underlay depths varied from room to room & carpet wear affected readings.
The findings show that there have been differential settlements of the house slab. Specifically, there is visible bending of the left wall, caused by settlements of the rear and front-left corner.

๐Ÿฑ.๐Ÿฌ ๐—–๐—”๐—จ๐—ฆ๐—˜๐—ฆ

๐Ÿฑ.๐Ÿญ ๐—ฆ๐—ถ๐˜๐—ฒ ๐˜„๐—ผ๐—ฟ๐—ธ๐˜€.

In this case, it is likely that original estate development civil works resulted in placement of loose landfill on sections of the block. It is apparent that consolidation of soft/loose soils under some areas of the slab have caused settlements, floor level variations and damages.
Ground movements, and particularly differential settlements have caused the slab level variations and the damages identified.

๐Ÿฒ.๐Ÿฌ ๐—ฅ๐—˜๐—–๐—ข๐— ๐— ๐—˜๐—ก๐——๐—”๐—ง๐—œ๐—ข๐—ก๐—ฆ

๐Ÿฒ.๐Ÿญ ๐—•๐—ฟ๐—ถ๐—ฒ๐—ณ

The floor level variations and house damages have been caused by ground movements - particularly differential settlements. There is no urgency to do so, but assurance of stability and some reasonable correction of floor level variations would require some underpinning.

๐Ÿฒ.๐Ÿฎ ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด

We have illustrated the approximate underpinning locations (see yellow highlights on sketch), subject to the design engineerโ€™s input.
We estimate that conventional underpinning utilizing reinforced concrete piers & headstocks would involve approximately 15 underpins.
A reasonable industry rate for underpinning would be approximately $2,500 - $3,500 per underpin location, but this may vary, subject to engineerโ€™s design.

Establishment & general repair & clean-up costs also apply

๐Ÿฒ.๐Ÿฏ ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด ๐—–๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐—ผ๐—ฟ๐˜€

Underpinning Contractors should be well established Registered Repair Builders who do all of the repairs and do not use subcontractors for any repair work;

๐Ÿฒ.๐Ÿฐ ๐—ง๐˜†๐—ฝ๐—ฒ๐˜€ ๐—ผ๐—ณ ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด

As advised...

๐™๐™ž๐™ง๐™จ๐™ฉ ๐™„๐™ข๐™ฅ๐™ง๐™š๐™จ๐™จ๐™ž๐™ค๐™ฃ๐™จ ๐™ค๐™›๐™ฉ๐™š๐™ฃ ๐™ก๐™ž๐™š

The impression was that the house had undergone some subsidence and had some "normal" wall cracks, and it looked like it was not serious.
But our thorough investigation found that the house was not stable at all, and ongoing settlements were causing the house slab to bend in the long direction (front-to back). And it was getting worse.

๐—œ๐—บ๐—ฎ๐—ด๐—ถ๐—ป๐—ฒ ๐—ถ๐—ณ ๐˜†๐—ผ๐˜‚ ๐˜„๐—ฒ๐—ฟ๐—ฒ ๐—ฎ ๐—ต๐—ผ๐—บ๐—ฒ ๐—ฏ๐˜‚๐˜†๐—ฒ๐—ฟ ๐—ฎ๐—ป๐—ฑ ๐—ฎ๐—ณ๐˜๐—ฒ๐—ฟ ๐—บ๐—ผ๐˜ƒ๐—ถ๐—ป๐—ด ๐—ถ๐—ป, ๐˜†๐—ผ๐˜‚ ๐—ณ๐—ผ๐˜‚๐—ป๐—ฑ ๐˜๐—ต๐—ฎ๐˜ ๐˜๐—ต๐—ฒ ๐—ณ๐—น๐—ผ๐—ผ๐—ฟ ๐˜„๐—ฎ๐˜€ ๐˜€๐—ถ๐—ป๐—ธ๐—ถ๐—ป๐—ด ๐—ฎ๐—ป๐—ฑ ๐˜„๐—ฎ๐—น๐—น ๐—ฐ๐—ฟ๐—ฎ๐—ฐ๐—ธ๐˜€ ๐˜„๐—ฒ๐—ฟ๐—ฒ ๐—ด๐—ฒ๐˜๐˜๐—ถ๐—ป๐—ด ๐˜„๐—ผ๐—ฟ๐˜€๐—ฒ ๐—ฎ๐—ป๐—ฑ ๐˜„๐—ผ๐—ฟ๐˜€๐—ฒ!

๐™€๐™ญ๐™ฅ๐™š๐™ง๐™ž๐™š๐™ฃ๐™˜๐™š๐™™ & ๐™๐™๐™ค๐™ง๐™ค๐™ช๐™œ๐™

Our subsidence investigations call on decades of soil testing experience. And we meticulously examine the building for gaps and cracks.

๐™๐™ก๐™ค๐™ค๐™ง ๐™ก๐™š๐™ซ๐™š๐™ก ๐™Ž๐™ช๐™ง๐™ซ๐™š๐™ฎ โ€“ ๐™‘๐™š๐™ง๐™ฎ ๐™„๐™ข๐™ฅ๐™ค๐™ง๐™ฉ๐™–๐™ฃ๐™ฉ!

We always take a floor level survey which is Absolutely Essential for any subsidence and wall crack investigation.

Any respectable engineer subsidence report has to include a floor level survey. Without it, it is impossible to identify and interpret footing and slab movements and particularly, the severity and influence of house damages.


Underpinning Assessment

Subsidence & Wall Cracks: Underpinning Free Home Assessment was Wrong

The owner of this townhouse had a free wall cracks assessment from a very chatty & charming underpinning sales rep.
And the underpinning sales rep told him that these wall cracks were caused by very serious subsidence and that Underpinning was needed URGENTLY!
๐—ง๐—ต๐—ฎ๐—ป๐—ธ ๐—ด๐—ผ๐—ผ๐—ฑ๐—ป๐—ฒ๐˜€๐˜€ ๐—ต๐—ฒ ๐—ฐ๐—ฎ๐—น๐—น๐—ฒ๐—ฑ ๐˜‚๐˜€ ๐—ฎ๐˜ ๐—™๐—ผ๐—ฟ๐—ฒ๐—ป๐˜€๐—ถ๐—ฐ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ๐˜€.
At Forensic Engineers we specialize in expert subsidence reports that identify how serious damage are and what are the root causes. And most importantly, we are 100% independent and have the property owners interests at heart.
In this case, our comprehensive investigation found that there had only been some very slight footing movements.
And, the scary cracks were just fine cracks in highly weathered wall render and there had been a build-up of black mould!
Yes. The underpinning sales rep did not even know the difference between mould and serious wall cracks & subsidence.
Forensic Engineers are the wall crack & subsidence specialists.
We are 100% independent.
We are on your side and we are definitely not trying to sell you any underpinning.

Do I need a structural engineer report - absolutely

Do I Need a Structural Engineer Report? Absolutely!

๐—ฃ๐—ถ๐—บ๐—ฝ๐—ฎ๐—บ๐—ฎ ๐—ต๐—ผ๐˜‚๐˜€๐—ฒ โ€“ ๐™ฌ๐™๐™ฎ ๐™ž๐™จ ๐™ข๐™ฎ ๐™›๐™ก๐™ค๐™ค๐™ง ๐™—๐™ค๐™ช๐™ฃ๐™˜๐™ž๐™ฃ๐™œ?

This house was about to be renovated, but the owner was concerned about โ€œbouncing floorsโ€ and called Forensic Engineers to investigate.
Our expert investigation found;
โ€ข The house stumps have subsided and were leaning severely
โ€ข There were other very serious problems with the house bearers and foundations and more..
โ€ข There was no doubt that the house and renovations would sustain damages unless the house was re-stumped first.
๐˜ž๐˜ฆ ๐˜ง๐˜ฆ๐˜ญ๐˜ต ๐˜ง๐˜ฐ๐˜ณ ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฐ๐˜ธ๐˜ฏ๐˜ฆ๐˜ณ, ๐˜ฃ๐˜ถ๐˜ต ๐˜ฃ๐˜ฆ๐˜ต๐˜ต๐˜ฆ๐˜ณ ๐˜ต๐˜ฐ ๐˜ฌ๐˜ฏ๐˜ฐ๐˜ธ ๐˜ต๐˜ฉ๐˜ฆ๐˜ด๐˜ฆ ๐˜ต๐˜ฉ๐˜ช๐˜ฏ๐˜จ๐˜ด ๐˜ฃ๐˜ฆ๐˜ง๐˜ฐ๐˜ณ๐˜ฆ ๐˜ฅ๐˜ฐ๐˜ช๐˜ฏ๐˜จ ๐˜ฆ๐˜น๐˜ฑ๐˜ฆ๐˜ฏ๐˜ด๐˜ช๐˜ท๐˜ฆ ๐˜ณ๐˜ฆ๐˜ฏ๐˜ฐ๐˜ท๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ๐˜ด ๐˜ข๐˜ฏ๐˜ฅ ๐˜ญ๐˜ข๐˜ต๐˜ฆ๐˜ณ ๐˜ง๐˜ช๐˜ฏ๐˜ฅ ๐˜ต๐˜ฉ๐˜ข๐˜ต ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฉ๐˜ฐ๐˜ถ๐˜ด๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ถ๐˜ฏ๐˜ด๐˜ต๐˜ข๐˜ฃ๐˜ญ๐˜ฆ. ๐˜ž๐˜ฆ ๐˜ฑ๐˜ถ๐˜ต ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฐ๐˜ธ๐˜ฏ๐˜ฆ๐˜ณ ๐˜ช๐˜ฏ ๐˜ต๐˜ฐ๐˜ถ๐˜ค๐˜ฉ ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜ข๐˜ฏ ๐˜ฆ๐˜น๐˜ฑ๐˜ฆ๐˜ณ๐˜ต ๐˜ณ๐˜ฆ๐˜ฑ๐˜ข๐˜ช๐˜ณ ๐˜ฃ๐˜ถ๐˜ช๐˜ญ๐˜ฅ๐˜ฆ๐˜ณ ๐˜ต๐˜ฐ ๐˜ฎ๐˜ข๐˜ฌ๐˜ฆ ๐˜ข ๐˜ฑ๐˜ญ๐˜ข๐˜ฏ ๐˜ง๐˜ฐ๐˜ณ ๐˜ค๐˜ฐ๐˜ฎ๐˜ฑ๐˜ญ๐˜ฆ๐˜ต๐˜ฆ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ง๐˜ฆ๐˜ด๐˜ด๐˜ช๐˜ฐ๐˜ฏ๐˜ข๐˜ญ ๐˜ณ๐˜ฆ๐˜ฑ๐˜ข๐˜ช๐˜ณ๐˜ด.

๐——๐—ฒ๐—ฒ๐—ฏ๐—ถ๐—ป๐—ด ๐—›๐—ฒ๐—ถ๐—ด๐—ต๐˜๐˜€ ๐—ต๐—ผ๐˜‚๐˜€๐—ฒ โ€“ ๐™ฉ๐™๐™š ๐™—๐™ง๐™ž๐™˜๐™  ๐™ข๐™ค๐™ง๐™ฉ๐™–๐™ง ๐™ž๐™จ ๐™›๐™–๐™ก๐™ก๐™ž๐™ฃ๐™œ ๐™ค๐™ช๐™ฉ!!

The buyer of this house was concerned about brick cracks.
Our expert investigation found:
โ€ข The house had some foundation movements
โ€ข The house footings had not moved significantly
โ€ข The wall cracks were only in masonry joints
โ€ข The masonry joint were filled with mortar instead of an elasticated compound
โ€ข Repairs were simple; replace the joint seals with an industry standard, elasticated compound
๐˜ž๐˜ฆ ๐˜ข๐˜ด๐˜ด๐˜ถ๐˜ณ๐˜ฆ๐˜ฅ ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฃ๐˜ถ๐˜บ๐˜ฆ๐˜ณ ๐˜ต๐˜ฉ๐˜ข๐˜ต ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฉ๐˜ฐ๐˜ถ๐˜ด๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ด๐˜ต๐˜ข๐˜ฃ๐˜ญ๐˜ฆ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฏ๐˜ฐ ๐˜ด๐˜ฆ๐˜ณ๐˜ช๐˜ฐ๐˜ถ๐˜ด ๐˜ณ๐˜ฆ๐˜ฑ๐˜ข๐˜ช๐˜ณ๐˜ด ๐˜ธ๐˜ฆ๐˜ณ๐˜ฆ ๐˜ณ๐˜ฆ๐˜ฒ๐˜ถ๐˜ช๐˜ณ๐˜ฆ๐˜ฅ. ๐˜๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ต๐˜ฉ๐˜ณ๐˜ช๐˜ญ๐˜ญ๐˜ฆ๐˜ฅ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ต๐˜ฉ๐˜ฆ ๐˜ด๐˜ข๐˜ญ๐˜ฆ ๐˜ธ๐˜ฆ๐˜ฏ๐˜ต ๐˜ต๐˜ฉ๐˜ณ๐˜ฐ๐˜ถ๐˜จ๐˜ฉ ๐˜ด๐˜ฎ๐˜ฐ๐˜ฐ๐˜ต๐˜ฉ๐˜ญ๐˜บ.

๐—–๐—ผ๐—ผ๐—บ๐—ฒ๐—ฟ๐—ฎ ๐—ต๐—ผ๐˜‚๐˜€๐—ฒ โ€“ ๐™’๐™๐™–๐™ฉ ๐™ž๐™จ ๐™ฉ๐™๐™ž๐™จ ๐™ช๐™ฃ๐™™๐™š๐™ง ๐™ฉ๐™๐™š ๐™จ๐™ก๐™–๐™—??

The buyer was very concerned about the slab edge beam not being on solid ground.
Our expert investigation found:
โ€ข The house had a waffle-pod slab
โ€ข There were some areas where the slab edge was not supported on solid ground
โ€ข The slab was also suspended on piers and also anchored into a retaining wall
โ€ข There had been no deflections of the house slab
๐˜ž๐˜ฆ ๐˜ข๐˜ด๐˜ด๐˜ถ๐˜ณ๐˜ฆ๐˜ฅ ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฃ๐˜ถ๐˜บ๐˜ฆ๐˜ณ ๐˜ต๐˜ฉ๐˜ข๐˜ต ๐˜ต๐˜ฉ๐˜ฆ ๐˜ฉ๐˜ฐ๐˜ถ๐˜ด๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ด๐˜ฐ๐˜ถ๐˜ฏ๐˜ฅ-๐˜ข๐˜ด-๐˜ข-๐˜ฑ๐˜ฐ๐˜ถ๐˜ฏ๐˜ฅ. ๐˜๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ณ๐˜ฆ๐˜ข๐˜ญ๐˜ญ๐˜บ ๐˜ฉ๐˜ข๐˜ฑ๐˜ฑ๐˜บ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ต๐˜ฉ๐˜ฆ ๐˜ด๐˜ข๐˜ญ๐˜ฆ ๐˜ธ๐˜ฆ๐˜ฏ๐˜ต ๐˜ต๐˜ฉ๐˜ณ๐˜ฐ๐˜ถ๐˜จ๐˜ฉ ๐˜ด๐˜ฎ๐˜ฐ๐˜ฐ๐˜ต๐˜ฉ๐˜ญ๐˜บ.

๐—–๐—ผ๐—น๐—น๐—ถ๐—ป๐—ด๐˜„๐—ผ๐—ผ๐—ฑ ๐—ฃ๐—ฎ๐—ฟ๐—ธ ๐—ต๐—ผ๐˜‚๐˜€๐—ฒ โ€“ ๐˜ฝ๐™ค๐™ฎ-๐™ค๐™-๐™—๐™ค๐™ฎ โ€“ ๐˜พ๐™–๐™ก๐™ก ๐™๐™ค๐™ง๐™š๐™ฃ๐™จ๐™ž๐™˜ ๐™€๐™ฃ๐™œ๐™ž๐™ฃ๐™š๐™š๐™ง๐™จ!!!

This property was built in the 80โ€™s and was being put up for sale and the agent was concerned about house cracks. So she called Forensic Engineers.
And Wow! We found a lot of wall cracks, and more!
Our expert investigation found
โ€ข Massive wall & ceiling cracks, tears and gaps
โ€ข Huge variations in floor levels
โ€ข Serious slab bending
โ€ข Significant slope from the front-left to the rear-right corner.
โ€ข Highly plastic clay soils shrinking and swelling
โ€ข Inadequate footings and slab.
๐˜›๐˜ฉ๐˜ฆ ๐˜ฉ๐˜ฐ๐˜ถ๐˜ด๐˜ฆ ๐˜ฉ๐˜ข๐˜ฅ ๐˜ฅ๐˜ฆ๐˜ค๐˜ข๐˜ฅ๐˜ฆ๐˜ด ๐˜ฐ๐˜ง ๐˜ด๐˜ฆ๐˜ณ๐˜ช๐˜ฐ๐˜ถ๐˜ด ๐˜ฎ๐˜ฐ๐˜ท๐˜ฆ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต๐˜ด ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฅ๐˜ข๐˜ฎ๐˜ข๐˜จ๐˜ฆ๐˜ด. ๐˜๐˜ต ๐˜ธ๐˜ฐ๐˜ถ๐˜ญ๐˜ฅ ๐˜ฃ๐˜ฆ ๐˜ข ๐˜ฎ๐˜ข๐˜ซ๐˜ฐ๐˜ณ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ซ๐˜ฆ๐˜ค๐˜ต ๐˜ฐ๐˜ง ๐˜ถ๐˜ฏ๐˜ฅ๐˜ฆ๐˜ณ๐˜ฑ๐˜ช๐˜ฏ๐˜ฏ๐˜ช๐˜ฏ๐˜จ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฃ๐˜ถ๐˜ช๐˜ญ๐˜ฅ๐˜ช๐˜ฏ๐˜จ ๐˜ณ๐˜ฆ๐˜ฑ๐˜ข๐˜ช๐˜ณ๐˜ด. And it's not likely to be ๐˜ข๐˜ฏ ๐˜ฆ๐˜ค๐˜ฐ๐˜ฏ๐˜ฐ๐˜ฎ๐˜ช๐˜ค๐˜ข๐˜ญ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ฑ๐˜ฐ๐˜ด๐˜ช๐˜ต๐˜ช๐˜ฐ๐˜ฏ.

COOMERA WATERS SUBSIDENCE DAMAGE

SUBSIDENCE, WALL CRACKS, STRUCTURAL ENGINEER REPORT.

The owners of this house at Coomera Waters found some cracks and gaps and called Forensic Engineers.
Our investigation found that the cracks & gaps were not so large and the building level variations were not excessive. However, our thorough investigation also found that part of the house was located on loose landfill which was gradually settling. And stabilizing the house would require some underpinning.
And, our expert engineer report indicated the underpinning locations, the best types of underpins and the best underpinners for the work.
The property owners were incredibly relieved that they had a positive plan to fix their precious home and could move forward with confidence.
Locally Based.
Forensic Engineers are based on the Gold Coast and service SE Qld & Nth NSW.
Extensive Experience.
We have decades of experience in soil test / geotechnical engineering as well as decades of subsidence & wall crack investigation experience. And our Structural Engineer reports draw on that knowledge of ground conditions that cause footing movements and house damages.

Home owners, buyers and sellers with house subsidence or wall crack problems

Forย  peace-of-mind, contact Forensic Engineers for an expert, independent Structural Engineer Report.

Which Underpinning is Best?

๐—ช๐—›๐—œ๐—–๐—› ๐—ง๐—ฌ๐—ฃ๐—˜ ๐—ข๐—™ ๐—จ๐—ก๐——๐—˜๐—ฅ๐—ฃ๐—œ๐—ก๐—ก๐—œ๐—ก๐—š ๐—œ๐—ฆ ๐—•๐—˜๐—ฆ๐—ง?

๐™๐™๐™š ๐™—๐™š๐™จ๐™ฉ ๐™ค๐™ฃ๐™šย is determined is determined by

  • the building type
  • the ground conditions
  • achievable results
  • accessibility
  • and affordability.ย 

๐—™๐—œ๐—ฅ๐—ฆ๐—ง ๐—ฅ๐—จ๐—Ÿ๐—˜ : Get an independent opinion

The different Underpinning methods, costs and achievable results are very confusing. That's where Forensic Engineers can help. Before signing up for any type of expensive underpinning, do yourself a favour and contact Forensic Engineers for an expert, independent structural engineer report. Because we are on your side..

๐—ฆ๐—˜๐—–๐—ข๐—ก๐—— ๐—ฅ๐—จ๐—Ÿ๐—˜: ๐—ช๐—ต๐—ถ๐—ฐ๐—ต ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด ๐—ถ๐˜€ ๐—•๐—ฒ๐˜€๐˜ ๐—ณ๐—ผ๐—ฟ ๐—ฌ๐—ผ๐˜‚?

  • Reinforced concrete pier underpinning is the industry standard due to the practicality and long-term reliability.
  • Polyurethane Resin Underpinning can be very effective for densifying and binding founding soils and lifting footings and concrete slabs. It is important that the Resins are injected throughout the soil profile layers that are causing any footing and slab settlements, and not just immediately under the footings and slab. Also, certain footing and slab designs and certain ground conditions may limit the results of Polyurethane Resin Underpinning.
  • Steel screw piers have benefits where ground water and collapsible soils are encountered, as well as cases where extra deep piers are needed to find strong natural ground. ๐—ง๐—ต๐—ฒ ๐—ฏ๐—ฒ๐˜€๐˜ ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ฒ๐—ฟ๐˜€ have extensive experience in all types of underpinning and will install the industry standard reinforced ๐—ฏ๐—ผ๐—ฟ๐—ฒ๐—ฑ ๐—ฝ๐—ถ๐—ฒ๐—ฟ๐˜€, or ๐˜€๐˜๐—ฒ๐—ฒ๐—น ๐˜€๐—ฐ๐—ฟ๐—ฒ๐˜„ ๐—ฝ๐—ถ๐—ฒ๐—ฟ๐˜€, if and when required, and at a realistic cost.

๐—ง๐—›๐—œ๐—ฅ๐—— ๐—ฅ๐—จ๐—Ÿ๐—˜: ๐—›๐—ผ๐˜„ ๐—บ๐˜‚๐—ฐ๐—ต ๐˜€๐—ต๐—ผ๐˜‚๐—น๐—ฑ ๐˜†๐—ผ๐˜‚ ๐—ฝ๐—ฎ๐˜† ๐—ณ๐—ผ๐—ฟ ๐—ฎn Independent ๐—ฆ๐˜๐—ฟ๐˜‚๐—ฐ๐˜๐˜‚๐—ฟ๐—ฎ๐—น ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ๐˜€ Subsidence ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜?

The base industry cost in South-East Queensland is around $๐Ÿด๐Ÿฌ๐Ÿฌ.๐Ÿฌ๐Ÿฌ-$๐Ÿต๐Ÿฌ๐Ÿฌ.๐Ÿฌ๐Ÿฌ,ย  depending on the house size and the property location.

Forensic Engineers have decades of Soil Testing experience, so we know what kinds of ground conditions can cause footing and slab movements. And we are 100% independent. Forensic Engineers are the subsidence and underpinning specialists, and when we inspect your home and prepare an engineer report, ๐—ฟ๐—ฒ๐˜€๐˜ ๐—ฎ๐˜€๐˜€๐˜‚๐—ฟ๐—ฒ๐—ฑ ๐˜๐—ต๐—ฎ๐˜ ๐˜„๐—ฒ ๐—ฎ๐—ฟ๐—ฒ ๐—ผ๐—ป ๐˜†๐—ผ๐˜‚๐—ฟ ๐˜€๐—ถ๐—ฑ๐—ฒ.

๐—™๐—ข๐—จ๐—ฅ๐—ง๐—› ๐—ฅ๐—จ๐—Ÿ๐—˜: ๐—”๐˜ƒ๐—ผ๐—ถ๐—ฑ Unnecessary ๐—จ๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด ๐—ช๐—ต๐—ฒ๐—ป ๐—ฃ๐—ผ๐˜€๐˜€๐—ถ๐—ฏ๐—น๐—ฒ

In many cases, footings and slabs can be stabilized without resorting to any expensive & stressful underpinning at all. And excessive footing movements can often be reduced by following expert advice. Talk to Forensic Engineers for the best solutions!

Subsidence & wall cracks? Before jumping into expensive underpinning, contact Forensic Engineers for an expert, independent structural engineer report.

๐—˜๐—ก๐—— ๐—š๐—”๐— ๐—˜: ๐—ฆ๐—ฝ๐—ฒ๐—ฎ๐—ธ ๐˜๐—ผ ๐˜‚๐˜€ ๐—ณ๐—ฟ๐—ผ๐—บ ๐˜๐—ต๐—ฒ ๐—ด๐—ฒ๐˜-๐—ด๐—ผ!

Contact FORENSIC ENGINEERS for an expert RPEQ Engineer Report for subsidence, wall cracks and underpinning. ๐—•๐—ฒ๐—ฐ๐—ฎ๐˜‚๐˜€๐—ฒ ๐˜„๐—ฒ ๐—ฎ๐—ฟ๐—ฒ ๐Ÿญ๐Ÿฌ๐Ÿฌ% ๐—ถ๐—ป๐—ฑ๐—ฒ๐—ฝ๐—ฒ๐—ป๐—ฑ๐—ฒ๐—ป๐˜ ๐—ฎ๐—ป๐—ฑ ๐˜„๐—ฒ ๐—ฎ๐—ฟ๐—ฒ ๐—ผ๐—ป ๐˜†๐—ผ๐˜‚๐—ฟ ๐˜€๐—ถ๐—ฑ๐—ฒ.

Servicing Brisbane, the Gold Coast, and surrounds. Contact us today for a chat about about subsidence and a quote for an engineer investigation and report.


Home Owner Saved Thousands on Underpinning

Structural Engineer Underpinning Report:

This is a recent case in Marsden and there has been some serious subsidence.
We identified the causes of the subsidence and we recommended some conventional underpinning to support the settled footings and to correct the level variations. Fortunately the problem was only for one corner of the house and our estimate was for 6 or 7 underpins, and the cost would be quite reasonable.
Fortunately, this was a routine case and the subsidence area was limited.
But Guess What?
We were astounded when the home owner told us an Underpinner's Free Home Assessment had estimated for at least a dozen underpins and that would be twice the actual cost!
That's right. The normal industry rate for a job like this would be HALF of was quoted.
In this case,ย  we determined that conventional reinforced concrete underpinning was the most effective and affordable. Other methods such as Resin Injection would not stabilize the founding soils. And Steel Screw Piers would not be necessary or cost effective.
We recommended that the owner should get in touch with some genuine underpinners to get a more reasonable proposal.

Thinking of underpinning? Contact us for an Expert Structural Engineer Report.

We Are Independent and We Aren't Trying to Sell You Anything.


Strata and Body Corp RPEQ Engineer Reports, Wall Cracks, Subsidence, Underpinning

๐—•๐—ผ๐—ฑ๐˜† ๐—–๐—ผ๐—ฟ๐—ฝ & ๐—ฆ๐˜๐—ฟ๐—ฎ๐˜๐—ฎ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜ ๐—ฆ๐—ฝ๐—ฒ๐—ฐ๐—ถ๐—ฎ๐—น๐—ถ๐˜€๐˜๐˜€!

In this recent case, the Body Corp called us in to investigate and report on this townhouse with subsidence and wall cracks and gaps that were getting worse and worse.

It turned out that other engineers had previously looked at the building and had decided that subsidence had occurred in the past and had stopped and and the damages were not serious and could be patched and painted. Sadly, they were wrong.

CALL FORENSIC ENGINEERS!

Forensic Engineers has decades of Soil Testing & Geotechnincal experience. And becsue of that, we identified that the townhouse was actually located on ๐—น๐—ผ๐—ผ๐˜€๐—ฒ ๐—น๐—ฎ๐—ป๐—ฑ๐—ณ๐—ถ๐—น๐—น that was gradually ๐˜€๐˜‚๐—ฏ๐˜€๐—ถ๐—ฑ๐—ถ๐—ป๐—ด, bit-by-bit, year after year. And stabilization with ๐˜‚๐—ป๐—ฑ๐—ฒ๐—ฟ๐—ฝ๐—ถ๐—ป๐—ป๐—ถ๐—ป๐—ด ๐˜„๐—ฎ๐˜€ ๐˜๐—ต๐—ฒ ๐˜€๐—ผ๐—น๐˜‚๐˜๐—ถ๐—ผ๐—ป.

In this case, Resin / Chemical Underpinning was not considered appropriate and Steel Screw piers would be far too expensive and unnecessary.

The most reliable and cost effective method was with conventional underpinning using reinforced concrete piers and head-stocks.

๐—™๐—ผ๐—ฟ๐—ฒ๐—ป๐˜€๐—ถ๐—ฐ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ๐˜€ ๐—ฎ๐—ฟ๐—ฒ ๐˜๐—ต๐—ฒ ๐—•๐—ผ๐—ฑ๐˜† ๐—–๐—ผ๐—ฟ๐—ฝ & ๐—ฆ๐˜๐—ฟ๐—ฎ๐˜๐—ฎ ๐—ฆ๐—ฝ๐—ฒ๐—ฐ๐—ถ๐—ฎ๐—น๐—ถ๐˜€๐˜๐˜€.

  • Our service is first class
  • Quotes in hours
  • Decades of soil testing experience
  • Inspections and reports in days not weeks.
  • Very competitive rates.
  • REPQ engineer reports

O๐˜‚๐—ฟ ๐—ฏ๐—ฟ๐—ถ๐—น๐—น๐—ถ๐—ฎ๐—ป๐˜ RPEQ ๐—ฆ๐˜๐—ฟ๐˜‚๐—ฐ๐˜๐˜‚๐—ฟ๐—ฎ๐—น ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜๐˜€ ๐—ฎ๐—ฟ๐—ฒ ๐—ฎ๐—ณ๐—ณ๐—ผ๐—ฟ๐—ฑ๐—ฎ๐—ฏ๐—น๐—ฒ, ๐—ฎ๐—ฐ๐—ฐ๐˜‚๐—ฟ๐—ฎ๐˜๐—ฒ, ๐—ฒ๐—ฎ๐˜€๐˜† ๐˜๐—ผ ๐˜‚๐—ป๐—ฑ๐—ฒ๐—ฟ๐˜€๐˜๐—ฎ๐—ป๐—ฑ ๐—ฎ๐—ป๐—ฑ ๐Ÿญ๐Ÿฌ๐Ÿฌ% ๐—ถ๐—ป๐—ฑ๐—ฒ๐—ฝ๐—ฒ๐—ป๐—ฑ๐—ฒ๐—ป๐˜.


Polyurethane Resin Injection Underpinning? Slab Lifting Required

This Gymnasium floor is out-of-level and keeps on moving.

Our Structural Engineer investigation found the building is on Brisbane River compressible river alluvial soils. And that they are constantly, gradually subsiding.

Also, flood events and saturation of the founding soils also exacerbate the subsidence.

After a thorough investigation, our RPEQ Structural Engineer Report recommended ๐—ฆ๐˜๐—ฟ๐˜‚๐—ฐ๐˜๐˜‚๐—ฟ๐—ฎ๐—น ๐—จ๐—ฟ๐—ฒ๐˜๐—ต๐—ฎ๐—ป๐—ฒ ๐—ฅ๐—ฒ๐˜€๐—ถ๐—ป ๐—ด๐—ฟ๐—ผ๐˜‚๐—ป๐—ฑ ๐˜€๐˜๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป for re-establisment of an even floor surface.

There are a number of Companies offering Urethane Resin solutions for slab settlements and footing subsidence.

๐—ง๐—ต๐—ฒ ๐—ฝ๐—ฟ๐—ผ๐—ฐ๐—ฒ๐˜€๐˜€ ๐—ฐ๐—ฎ๐—ป ๐—ฏ๐—ฒ ๐—ฎ๐—บ๐—ฎ๐˜‡๐—ถ๐—ป๐—ด๐—น๐˜† ๐—ฒ๐—ณ๐—ณ๐—ฒ๐—ฐ๐˜๐—ถ๐˜ƒ๐—ฒ, ๐—ผ๐—ฟ ๐—ถ๐˜ ๐—ฐ๐—ฎ๐—ป ๐—ฑ๐—ผ ๐—ฎ๐—ฏ๐˜€๐—ผ๐—น๐˜‚๐˜๐—ฒ๐—น๐˜† ๐—ป๐—ผ๐˜๐—ต๐—ถ๐—ป๐—ด ๐—ฎ๐˜ ๐—ฎ๐—น๐—น. Depending the type of construction and the ground conditions and most importantly, The Experience of the Company doing the work.

If you are considering Resin Injection Underpinning, it is advisable to get an independent engineer report first.

Expert RPEQ Structural Engineer Reports: Forensic Engineers.


๐—›๐—ฎ๐—ป๐—ฑ๐˜€-๐—ผ๐—ป ๐—ฆ๐—ผ๐—ถ๐—น ๐—ง๐—ฒ๐˜€๐˜๐—ถ๐—ป๐—ด ๐—ฒ๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐—ถ๐˜€ ๐—ฎ๐—ป ๐—ฒ๐˜€๐˜€๐—ฒ๐—ป๐˜๐—ถ๐—ฎ๐—น ๐—ฟ๐—ฒ๐—พ๐˜‚๐—ถ๐—ฟ๐—ฒ๐—บ๐—ฒ๐—ป๐˜ ๐—ณ๐—ผ๐—ฟ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ๐˜€ ๐˜„๐—ต๐—ผ ๐—ฝ๐—ฟ๐—ผ๐˜ƒ๐—ถ๐—ฑ๐—ฒ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ ๐—ฆ๐˜‚๐—ฏ๐˜€๐—ถ๐—ฑ๐—ฒ๐—ป๐—ฐ๐—ฒ & ๐—ช๐—ฎ๐—น๐—น ๐—–๐—ฟ๐—ฎ๐—ฐ๐—ธ ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜๐˜€.

Subsidence Engineer Reports, Soil Testing Experience Required

๐—›๐—ฎ๐—ป๐—ฑ๐˜€-๐—ผ๐—ป ๐—ฆ๐—ผ๐—ถ๐—น ๐—ง๐—ฒ๐˜€๐˜๐—ถ๐—ป๐—ด ๐—ฒ๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐—ถ๐˜€ ๐—ฎ๐—ป ๐—ฒ๐˜€๐˜€๐—ฒ๐—ป๐˜๐—ถ๐—ฎ๐—น ๐—ฟ๐—ฒ๐—พ๐˜‚๐—ถ๐—ฟ๐—ฒ๐—บ๐—ฒ๐—ป๐˜ ๐—ณ๐—ผ๐—ฟ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ ๐—ฆ๐˜‚๐—ฏ๐˜€๐—ถ๐—ฑ๐—ฒ๐—ป๐—ฐ๐—ฒ & ๐—ช๐—ฎ๐—น๐—น ๐—–๐—ฟ๐—ฎ๐—ฐ๐—ธ ๐—ฅ๐—ฒ๐—ฝ๐—ผ๐—ฟ๐˜๐˜€.

Very Important: When deciding on an engineer for a subsidence & wall crack inspection, make sure the engineers have actual experience in field and lab soil testing themselves. Amazingly, very few engineers in S.E. Qld that offer wall crack & subsidence reports have any hands-on experience with soil testing.

๐‘ญ๐’๐’“๐’†๐’๐’”๐’Š๐’„ ๐‘ฌ๐’๐’ˆ๐’Š๐’๐’†๐’†๐’“๐’” ๐’‰๐’‚๐’—๐’† ๐’…๐’†๐’„๐’‚๐’…๐’†๐’” ๐’๐’‡ ๐’•๐’‰๐’‚๐’• ๐’†๐’™๐’‘๐’†๐’“๐’Š๐’†๐’๐’„๐’† ๐’Š๐’;

  • soil test drilling
  • soil lab testing
  • soil descriptions
  • site classifications
  • footing and slab designs; strip, pad and edge beam footings, conventional and waffle pod slabs
  • deep footing piers, conventional concrete piers, push-piles, small diameter driven timber piles and steel screw piles
  • Foundation Underpinning; conventional concrete, polyurethane resin, timber piles and steel screw piers.

๐‘จ๐’๐’… ๐’๐’–๐’“ ๐’Œ๐’๐’๐’˜๐’๐’†๐’…๐’ˆ๐’† ๐’๐’‡ ๐’“๐’†๐’ˆ๐’Š๐’๐’๐’‚๐’ ๐’”๐’๐’Š๐’ ๐’„๐’๐’๐’…๐’Š๐’•๐’Š๐’๐’๐’” ๐’Š๐’” ๐’”๐’†๐’„๐’๐’๐’…-๐’•๐’-๐’๐’๐’๐’†, ๐’Š๐’๐’„๐’๐’–๐’…๐’Š๐’๐’ˆ

  • areas with highly plastic clay soils
  • poorly compacted land fill
  • alluvial deposits
  • compressible soils
  • organic soils
  • acid-sulphate soils.
  • marine clays

๐—ข๐˜‚๐—ฟ ๐—ต๐—ฎ๐—ป๐—ฑ๐˜€-๐—ผ๐—ป ๐—ฒ๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ; real soil testing knowledge and skills.

It is essential that any engineers offering subsidence reports actually have local Queensland experience in soil testing and geotechnical behavior.

With over 5000 cases completed in the last 12 years. And before that, decades of actual Geotechnical / Soil Testing, Site Classification and Slab Design hands-on experience, Forensic Engineers are the best choice for RPEQ Structural Engineer Reports for subsidence and house foundation problems.


Subsidence, Wall Cracks, Sink Holes, Stump Damage

Structural Engineer Reports needed from Forensic Engineers.

These are cases we deal with every day.

Case 1) A house at Warner had serious settlements under a slab. We found the causes, assessed the slab condition and gave expert recommendations to re-support the slab. In this case pressure grouting was the most practical and affordable repair.

Case 2) A Tweed Heads house with possibly serious subsidence problems. We found that there had been some footing settlements a long time ago, but the house was now stable. Some drainage work and expert crack repair required - no underpinning needed! A terrific result.

Case 3) Walloon house with serious slab movements. We are in Walloon just about every week! If you are looking to buy a house in this area and the Building & Pest Report finds wall cracks - for peace-of-mind, call us to arrange an Expert Structural Engineer Report. In most cases there are some movements of the house footings and site works can help to keep the house relatively stable. In other cases where serious movements and damages are evident, traditional underpinning is the most effective method for stabilization, level correction and crack closure.

Case 4) A house on-the-market at Stafford. The buyer was concerned that damaged stumps have caused structural damages to the house. Our expert investigation found that apart from some stumps that were past their "use-by" date, the house was "sound-as-a pound".

Forensic Engineers: Expert RPEQ Structural Engineer Reports


0403 434 092