Building facades deteriorate over time. Weather, pollution, thermal movement, and age all take their toll on external walls, cladding, render, pointing, sealants, and fixings. Regular inspection is essential to identify defects before they become serious, to maintain the building's weathertight envelope, and to comply with legal obligations as a building owner or manager. But with several different types of facade inspection available, it can be difficult to know which one you need.
This guide explains the main types of facade inspection carried out in the UK, what each involves, and the circumstances in which each is appropriate.
Why Facade Inspections Matter
The external facade is the building's first line of defence against the elements. Any deterioration in the facade, whether it is cracked render, failed sealant, corroded fixings, or loose cladding panels, compromises the building envelope and can lead to water ingress, heat loss, and in severe cases, falling materials that endanger people below. Building owners have a legal duty under the Defective Premises Act and general health and safety legislation to ensure that their buildings do not pose a danger to occupants or the public.
Regular facade inspections allow you to identify and address defects early, when repairs are simple and affordable, rather than waiting until problems become critical and expensive. They also provide documented evidence of your maintenance programme, which is important for insurance, compliance, and property transactions.
Visual Facade Survey
A visual facade survey is the most basic type of inspection. It involves a qualified surveyor or technician examining the external facade visually, typically from a rope access position, and recording the condition of all visible elements. The survey covers render, brickwork, and masonry condition, pointing and mortar joints, sealant and mastic around windows and joints, window frames and glazing, decorative features and projections, rainwater goods and flashings, and any visible signs of movement, cracking, or water ingress.
The output is a written report with photographs documenting the condition of the facade and any defects identified, along with recommendations for remedial work prioritised by urgency. Visual facade surveys are suitable for routine condition monitoring and are typically carried out every three to five years as part of a planned maintenance programme. For buildings with known issues or those approaching the end of a warranty period, more frequent surveys may be appropriate.
EWS1 External Wall System Survey
The EWS1 survey was introduced in 2019 in response to the Grenfell Tower tragedy and is specifically concerned with the fire safety of external wall systems on residential buildings. It is not a general condition survey. The purpose of an EWS1 survey is to provide a standardised assessment of the external wall system's fire risk, which mortgage lenders and insurers require before approving transactions on affected buildings.
An EWS1 survey must be carried out by a suitably qualified professional, typically a chartered fire engineer or a member of a relevant professional body approved by the Royal Institution of Chartered Surveyors. The surveyor assesses the cladding type, insulation materials, cavity barriers, and overall external wall construction. For buildings where combustible materials may be present, intrusive inspection is required, meaning sections of cladding must be removed to examine the materials and construction behind them.
Rope access is the most practical and cost-effective method for carrying out intrusive EWS1 inspections, as it allows technicians to remove and reinstate cladding panels at any point on the building facade without the need for scaffolding.
Section 11 Facade Inspection
Section 11 inspections refer to the requirements under Section 11 of the London Building Acts (Amendment) Act 1939, which applies to buildings in London over 25 metres in height. Under this legislation, building owners must inspect the external facade at regular intervals and certify that it is safe and not liable to cause danger to people in the street below. Similar obligations exist under the Defective Premises Act for buildings outside London.
A Section 11 inspection involves a detailed examination of all external elements that could potentially become detached and fall, including stone and concrete features, render panels, cladding fixings, window surrounds, copings, and any projecting elements. The inspection must be carried out by a competent professional and typically involves close-up examination from a rope access position. The output is a formal report certifying the condition of the facade or identifying elements that require remedial work.
Full Facade Condition Survey
A full facade condition survey is a comprehensive assessment of the entire external envelope of the building. It goes beyond a visual survey to include a detailed assessment of all materials, systems, and components, and typically includes testing where appropriate. This might include adhesion testing of render or coating systems, moisture mapping using thermal imaging, pull-out testing of fixings, core sampling of materials, and sounding of render and tiles to identify hollow areas indicating delamination.
Full condition surveys are typically carried out when a building is being acquired, when planning a major refurbishment, or when specific concerns about the facade condition have been identified. They are more expensive and time-consuming than visual surveys but provide a complete picture of the building's external condition and remaining service life of various components.
Cladding Condition Assessment
For buildings with cladding systems, a specific cladding condition assessment focuses on the cladding panels, their fixings, the supporting framework, and the interfaces between the cladding and other building elements. This has become increasingly important following the building safety reforms, as building owners are now required to demonstrate that they understand and manage the risks associated with their cladding systems.
A cladding condition assessment typically includes visual inspection of all cladding panels for damage, distortion, or deterioration, examination of visible fixings and brackets, checking of sealant joints between panels, identification of any panels that have been replaced or repaired, and where necessary, removal of sample panels to inspect the condition of concealed fixings, insulation, and cavity barriers. Rope access is the standard method for carrying out cladding condition assessments, as it provides close-up access to all parts of the cladding system without the cost and disruption of scaffolding.
Drone Inspection vs Rope Access Inspection
Drone technology has advanced significantly in recent years, and drones are now used for some types of building inspection. However, it is important to understand the limitations of drone inspections compared to rope access. Drones can capture high-resolution photographs and video of the building facade, which is useful for identifying visible defects such as cracks, staining, damaged panels, and missing components. Thermal imaging cameras can be mounted on drones to detect areas of heat loss or moisture ingress.
However, drones cannot carry out intrusive inspection, which means they cannot remove cladding panels, test fixings, sound render, or take samples. They also cannot carry out any remedial work. Drones are affected by wind conditions and may not be usable in confined spaces between buildings. Civil Aviation Authority regulations restrict drone operations in many urban areas, and planning and permissions can add lead time and cost.
For a preliminary visual survey, drones can be a useful and cost-effective tool. For any inspection that requires close-up examination, testing, or intrusive investigation, rope access remains the only practical option. Many inspection programmes use both methods: drones for an initial overview and rope access for targeted detailed investigation of areas of concern.
Which Inspection Does Your Building Need?
The type of inspection you need depends on your circumstances. For routine condition monitoring every three to five years, a visual facade survey is usually sufficient. If your building is residential and over 11 metres in height, you may need an EWS1 survey if one has not already been carried out. If your building is in London and over 25 metres high, Section 11 inspections are a legal requirement. If you are planning a major refurbishment or acquiring a building, a full condition survey is advisable. If your building has cladding, a specific cladding condition assessment should form part of your regular inspection programme.
How to Arrange a Facade Inspection
The first step is to identify which type of inspection you need based on the guidance above. Then engage a rope access contractor with experience in the relevant type of survey work. Ensure they hold appropriate professional qualifications for the type of survey required, particularly for EWS1 work where specific professional accreditation is mandatory. Request a detailed scope of work and quotation before proceeding. Through our network, we can connect you with qualified rope access contractors who specialise in all types of facade inspection. Submit your details through our quote form to get started.