Cracks, settlement or concerns about the load-bearing capacity of your foundation? Aboss Bouwadvies helps develop a project-specific foundation repair package, combining investigation results, soil data, monitoring, structural calculations and construction drawings.
The scope of investigations and engineering is agreed for your property. Repair proposals depend on the condition of the existing structure, the ground and the findings of specialist investigations.
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Timber piles can deteriorate when changes in groundwater expose vulnerable parts of the foundation. Loss of timber strength can contribute to settlement and cracking. An investigation is needed to establish the condition and cause.
Bacterial attack can weaken timber piles and reduce their load-bearing capacity. Investigation helps assess the remaining condition and the need for repair.
Shallow foundations, without piles, may experience differential settlement where the soil is soft or uneven. The repair strategy needs to suit both the foundation type and ground conditions.
Foundation repair requires assessment of loads, stability, temporary support and deformation. Calculations and drawings give the contractor the project-specific requirements for the agreed work.
The method depends on the foundation type, damage, soil conditions and intended performance. The options below describe general approaches, not a repair prescription for a particular property.
New piles can be connected to a structural floor or beam arrangement that takes over loads from the walls. In the Netherlands this is often called the “tafelmethode”. Pile type and installation method must suit the project.
If deterioration is concentrated near the pile head, a repair involving concrete replacement sections may be considered. Investigation must establish that the remaining pile and its capacity are suitable.
Resin or grout injection may be considered for certain shallow-foundation settlement problems. Its suitability and expected effect need assessment using the soil data, damage pattern and proposed system.
The calculations support the technical assessment, application documents where required and the contractor’s preparation.
The exact deliverables and responsibilities are agreed before work starts.
A repair proposal needs reliable information about the existing foundation and ground. Aboss can discuss coordination of the required investigations and integration of the results into the engineering package.
Inspection, potentially including trial pits and timber assessment, helps establish the foundation’s condition and a suitable repair strategy. The current KCAF guideline for foundations beneath buildings replaced the separate F3O guidelines.
KCAF investigation guidance (Dutch)
CPT provides information about deeper soil layers and resistance. These data help the engineer assess pile design, including the proposed pile type, length and founding level.
Precision levelling using monitoring points can help establish whether settlement is continuing and at what rate. It can inform priorities and assessment of the effect of repair work.
Permit or notification requirements depend on the work and local rules. The competent authority decides on any application.
If foundation repair forms part of a renovation or extension, discuss a combined scope to avoid unnecessary overlap in investigations and design work.
These related pages are currently in Dutch or English as indicated.
Changing the load-bearing structure, for example by adding piles, transfer beams or a new floor, requires project-specific structural assessment. This supports any required application and gives the contractor design requirements for the work.
The required investigation depends on the property and proposed work. An inspection is often important where the cause of damage or condition of timber piles is uncertain. Discuss the appropriate investigation scope with the advisers involved.
CPT investigates the soil layers and resistance, which are important inputs for pile design. Foundation inspection assesses the existing foundation itself, such as piles, beams and supports, using appropriate inspection and investigation methods.
Repeated measurements help establish whether movement is continuing and how quickly it develops. They can inform priorities, selection of measures and assessment after repair.
Send the property address, photographs of cracking or settlement, existing drawings and any investigation reports. We will discuss the information needed and the proposed engineering scope.
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