IN SITU CONCRETE HOUSES Archives - Flettons Surveyors

The Wimpey No-Fines House

flettons — Wed, 25 Sep 2024 09:56:30 +0000

Understanding the Wimpey No-Fines House

Overview

The Wimpey No-Fines house is a form of post-war non-traditional housing developed in response to acute housing shortages following the Second World War. Constructed by George Wimpey & Co. Ltd between the 1940s and the 1970s, approximately 300,000 units were built across the UK, forming a significant part of the national housing stock.

These properties are also known by several alternative names, including Butterfly, Butterfly No-Fines, Formwall, Gateshead Butterfly, Gateshead No-Fines, Wimpey, and Wimpey W6M.

Wimpey No-Fines houses were designed to allow rapid and economical construction using no-fines concrete, a material that omits fine aggregates such as sand. This approach reduced material demands while enabling large-scale housing delivery.

Wimpey No-Fines houses were developed as a widely adopted post-war housing solution and remain a common non-traditional construction type across many parts of the UK.

Key takeaway Wimpey No-Fines houses are a widely distributed post-war construction type with distinctive concrete wall systems that require careful inspection for cracking, moisture ingress, and material deterioration.

A typical Wimpey No-Fines house showing rendered external walls and simple post-war architectural form.

Typical characteristics & construction

Wimpey No-Fines houses were constructed in a range of forms, including bungalows, two-storey semi-detached houses, and terraced dwellings. Roofs are typically medium-pitched hipped or gable designs covered with tiles, although some examples incorporate flat or shallow valley roofs finished with bituminous felt or asphalt.

External walls are generally rendered throughout, or rendered to the front and rear elevations with brickwork to the flank wall. Some properties incorporate front bay windows. The internal layout typically includes timber stud partitions lined with plasterboard.

Element	Typical construction	Inspection focus
Substructure	Concrete strip footings, brick under-building, concrete slab and DPC	Settlement, cracking, damp-proof course continuity
External walls	10-inch no-fines reinforced concrete with horizontal tie reinforcement	Vertical and horizontal cracking, render condition, carbonation
Separating walls	10-inch no-fines reinforced concrete	Cracking, movement, soundness
Floors	Concrete ground floor; timber first floor on joists and metal corbels	Deflection, dampness, timber condition
Roof	Timber rafters, purlins, tiled or felt-covered roof	Covering condition, water ingress, structural integrity

Potential hazards & inspection priorities

Vertical cracking to no-fines concrete external walls is a common defect, often accompanied by horizontal cracking to render above window drips. Corrosion and scarcity of wall ties to brick cladding, where present, can also be an issue.

Dense reinforced concrete ring beams may exhibit varying levels of carbonation, while the porous nature of no-fines concrete can increase susceptibility to damp and moisture ingress. Flat or shallow valley roofs are at risk of water pooling and membrane failure, potentially leading to internal water damage.

Is this house right for you?

Wimpey No-Fines houses may suit purchasers who understand non-traditional construction and are prepared to assess the property based on its individual condition, age, and maintenance history.

Commission a detailed building survey
Review evidence of repairs and ongoing maintenance
Consider the implications of concrete construction and moisture risk

Mortgage & resale considerations

Wimpey No-Fines houses are not generally classified as defective under the Defective Premises Act. However, lender acceptance can depend on condition, repair history, and the clarity of professional reporting.

Clear documentation, evidence of maintenance, and identification of any unresolved defects are commonly influential factors in mortgage and resale considerations.

What a survey can — and cannot — tell you

A building survey provides an informed assessment of the visible condition and construction of a Wimpey No-Fines house. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.

Identify visible cracking to no-fines concrete walls and associated render
Assess signs of dampness, moisture ingress, and condensation risk
Comment on roof coverings, drainage details, and external envelope condition
Review the general condition of accessible floors, ceilings, and structural elements
Highlight defects that may require repair, monitoring, or further investigation

However, there are limitations to what a survey can determine without intrusive investigation.

Confirm the condition of concealed reinforcement within no-fines concrete
Assess hidden structural elements behind finishes or linings
Determine the full extent of carbonation or internal concrete deterioration
Inspect areas that are inaccessible or covered at the time of inspection

Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.

For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.

Considering a Wimpey No-Fines house?

A detailed building survey can help clarify construction-specific risks before committing to a purchase.

Get your instant survey quote

Disclaimer: This article is provided for general educational purposes only and is based on industry research, professional knowledge, and experience. It does not relate to any specific property and should not be relied upon when making a purchasing decision. Prospective purchasers should always commission an independent RICS-qualified surveyor to conduct a full inspection and provide a report on the actual condition of any property of interest.

The post The Wimpey No-Fines House appeared first on Flettons Surveyors.

The Whatling House

flettons — Wed, 25 Sep 2024 09:52:51 +0000

Understanding the Whatling House

Overview

When considering a property purchase in the UK, understanding the history, construction, and inherent risks of the building type is essential. The Whatling house is a non-traditional form of post–First World War housing that is still encountered in parts of the country today. A clear understanding of how these houses were built, and where defects commonly arise, is central to making an informed assessment.

Whatling houses were manufactured by J H Whatling Ltd and constructed primarily between 1919 and the 1930s. Around 500 units were built, largely within suburban developments formed to address post-war housing shortages.

Key takeaway Whatling houses are robustly constructed for their era, but their reinforced concrete walls and detailing require close inspection for cracking, damp ingress, and long-term movement-related defects.

A typical Whatling house, identifiable by its pebbledash-rendered concrete walls and medium-pitched hipped roof.

Typical characteristics & construction

The Whatling house is generally a two-storey semi-detached dwelling. Roofs are medium-pitched and hipped in form, with some examples incorporating a mansard design. Clay or concrete tiles are commonly used as the roof covering. Bay windows are frequently present on the front ground floor elevation, with a flat canopy over the entrance door.

Externally, walls are finished with a rendered pebbledash coating. This finish forms part of the original construction and contributes to the distinctive appearance of the house type.

Element	Typical construction	Inspection focus
Substructure	Concrete strip foundations with concrete underbuilding	General stability, drainage provision, signs of settlement
External walls	Dense aggregate reinforced concrete cavity walls with pebbledash render	Cracking, condition of render, damp-proof course performance
Internal walls	Dense aggregate concrete walls and partitions	Cracking, movement, damp transfer from external walls
Floors	Timber boarding on timber joists at ground and first floor	Decay, dampness, adequacy of ventilation
Roof	Timber rafters with concrete or clay tiles	Tile condition, timber decay, water ingress

Potential hazards & inspection priorities

The most common defects encountered in Whatling houses relate to the behaviour of the reinforced concrete walls and the performance of damp-proofing measures. Vertical cracking to external walls is frequently observed and is often associated with settlement or thermal movement.

Horizontal cracking can also occur, particularly above ground floor window openings, where the absence of vertical movement joints places additional stress on the wall panels.

Dampness within the dense aggregate reinforced concrete walls is another recurring issue. This may be linked to compromised damp-proof courses, poor drainage, or deterioration of the external render finish.

Whatling houses are not classed as defective under the Defective Premises Act, but the presence of the defects described above should always be assessed carefully during inspection.

Is this house right for you?

Purchasing a Whatling house requires an understanding of non-traditional construction and an acceptance that defects may not always be immediately apparent. Condition can vary significantly between properties depending on maintenance history and exposure.

Careful inspection of external wall cracking is essential
Damp-related issues should be thoroughly assessed
Timber floors and roof structures require close attention

Mortgage & resale considerations

Mortgage acceptance for Whatling houses is influenced by construction type, condition, and the clarity of professional reporting. Lender criteria can vary, and clear identification of defects, together with evidence of repair or stability, is often critical.

Resale prospects are similarly linked to condition and the quality of supporting survey documentation.

What a survey can — and cannot — tell you

A building survey provides an informed assessment of the visible condition and construction of a Whatling house. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.

Identify visible cracking to reinforced concrete walls and render
Assess signs of dampness, moisture ingress, and condensation risk
Comment on roof coverings, drainage details, and external envelope condition
Review the general condition of accessible floors, ceilings, and structural elements
Highlight defects that may require repair, monitoring, or further investigation

However, there are limitations to what a survey can determine without intrusive investigation.

Confirm the condition of concealed reinforcement within concrete walls
Assess hidden structural elements behind finishes or linings
Determine the full extent of internal concrete deterioration
Inspect areas that are inaccessible or covered at the time of inspection

Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.

For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.

Considering a Whatling house?

A detailed building survey can help clarify construction-specific risks before committing to a purchase.

Get your instant survey quote

The post The Whatling House appeared first on Flettons Surveyors.

The Weir No-Fines House

flettons — Wed, 25 Sep 2024 09:50:45 +0000

Understanding the Weir No-Fines House

Overview

The Weir No-Fines house is a relatively rare post-war non-traditional property type, developed between 1949 and the 1950s in response to acute housing shortages. The system was designed and manufactured by Weir Housing Corporation Ltd, with only around 100 units constructed nationally.

Weir No-Fines houses are two-storey dwellings built using no-fines concrete external walls with reinforced concrete elements. Their limited numbers make them far less common than other no-fines systems.

Key takeaway The Weir No-Fines house relies heavily on reinforced concrete beams and solid no-fines walls, making careful inspection of concrete condition and moisture exposure a priority.

A Weir No-Fines house showing rendered external walls, tiled pitched roof, and flat precast concrete canopy.

Typical characteristics & construction

Weir No-Fines houses are generally found in suburban locations and were constructed as two-storey semi-detached or terraced dwellings. They are identifiable by their fully rendered elevations, medium pitch gable roofs covered with tiles, and a flat precast concrete canopy over the front entrance.

Element	Typical construction	Inspection focus
Substructure	Concrete strip footings and concrete slab with DPC	Settlement, cracking, damp proof course integrity
External walls	10-inch no-fines concrete with render finish	Cracking, carbonation, moisture penetration
Floors	Concrete ground floor, timber first floor on PS beams	Dampness, timber condition, deflection
Roof	Timber trusses with felt, sarking and tiles	Covering condition, ventilation, water ingress

Potential hazards & inspection priorities

The primary risks relate to the long-term performance of reinforced concrete beams at first floor and eaves level. Corrosion of embedded reinforcement can lead to cracking and loss of structural capacity if not identified and managed.

Rendered no-fines walls are also vulnerable to moisture ingress where cracking or failed detailing allows water penetration, increasing the risk of dampness and internal condensation.

Is this house right for you?

A Weir No-Fines house may be suitable for buyers who understand non-traditional concrete construction and are prepared to rely on detailed condition-based assessment rather than assumptions about age alone.

Commission a full building survey
Review evidence of concrete repair or maintenance
Allow for potential thermal upgrades

Mortgage & resale considerations

Mortgage acceptance depends on lender policy, property condition, and the clarity of professional reporting. While the Weir No-Fines house is not classed as defective under the Defective Premises Act, lenders often require detailed survey evidence.

Clear reporting, absence of significant concrete deterioration, and documented maintenance can influence lending and resale confidence.

What a survey can — and cannot — tell you

A building survey provides an informed assessment of the visible condition and construction of a Weir No-Fines house. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.

Identify visible cracking to no-fines concrete walls and associated render
Assess signs of dampness, moisture ingress, and condensation risk
Comment on roof coverings, drainage details, and external envelope condition
Review the general condition of accessible floors, ceilings, and structural elements
Highlight defects that may require repair, monitoring, or further investigation

However, there are limitations to what a survey can determine without intrusive investigation.

Confirm the condition of concealed reinforcement within no-fines concrete
Assess hidden structural elements behind finishes or linings
Determine the full extent of carbonation or internal concrete deterioration
Inspect areas that are inaccessible or covered at the time of inspection

Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.

For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.

Considering a Weir No-Fines house?

A detailed building survey can help clarify construction-specific risks before committing to a purchase.

Get your instant survey quote

The post The Weir No-Fines House appeared first on Flettons Surveyors.

The War Office No-Fines House

flettons — Wed, 25 Sep 2024 09:48:32 +0000

Understanding the War Office No-Fines House

Overview

The War Office No-Fines house is a rare and historically significant form of post-war housing developed in 1953. These properties were produced as part of a collaboration between the Building Research Station and the War Office, responding to the urgent need for durable and quickly constructed homes following extensive wartime damage.

War Office No-Fines houses were constructed in limited numbers, with only 20 units built. They are typically two-storey semi-detached houses formed in no-fines concrete and finished with external render.

Key takeaway War Office No-Fines houses are uncommon and structurally robust, but their solid concrete construction and internal plaster panel systems require careful inspection for dampness and movement-related defects.

A War Office No-Fines house showing rendered no-fines concrete walls and a medium pitch gable roof typical of this post-war construction type.

Typical characteristics & construction

War Office No-Fines houses are generally two-storey semi-detached properties. External walls are formed in 11-inch no-fines concrete, a material containing no fine aggregate, and finished externally with render.

Roofs are medium pitch gable constructions covered with concrete tiles and supported on timber rafters. Internally, walls are lined with coffered plaster panels, often incorporating bitumen coatings and wire ties associated with the original shuttering system.

Element	Typical construction	Inspection focus
Substructure	Concrete foundations (details limited)	Settlement, cracking, general stability
External walls	11-inch no-fines concrete with render	Cracking, render condition, moisture penetration
Separating wall	No-fines concrete with plaster panel lining	Cracking, soundness, movement
Floors	Concrete ground floor; RC slab with precast joists at first floor	Deflection, cracking, vibration
Roof	Timber rafters with concrete tiles	Tile condition, leaks, timber deterioration

Potential hazards & inspection priorities

Dampness is one of the more commonly reported issues, particularly within kitchens and other areas with higher moisture generation. This is often linked to ventilation limitations and the moisture behaviour of no-fines concrete.

Cracked or loose internal plaster panels are also frequently encountered. These can arise from building movement or long-term stress within the panel fixing system and should be assessed for extent and risk of detachment.

Is this house right for you?

Purchasers should be aware that War Office No-Fines houses differ from conventional masonry construction and require assessment based on their specific condition rather than age alone.

Commission a full building survey
Pay particular attention to dampness and internal finishes
Review evidence of past repairs and maintenance

Mortgage & resale considerations

These properties are not classified as defective under the Defective Premises Act. However, lender attitudes can vary depending on condition, documentation, and the clarity of professional reporting.

Evidence of good maintenance and clear survey findings will usually be influential factors in lending and resale decisions.

What a survey can — and cannot — tell you

Identify visible cracking to no-fines concrete walls and associated render
Assess signs of dampness, moisture ingress, and condensation risk
Comment on roof coverings, drainage details, and external envelope condition
Review the general condition of accessible floors, ceilings, and structural elements
Highlight defects that may require repair, monitoring, or further investigation

However, there are limitations to what a survey can determine without intrusive investigation.

Confirm the condition of concealed reinforcement within no-fines concrete
Assess hidden structural elements behind finishes or linings
Determine the full extent of carbonation or internal concrete deterioration
Inspect areas that are inaccessible or covered at the time of inspection

Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.

For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.

Considering a War Office No-Fines house?

A detailed building survey can help clarify construction-specific risks before committing to a purchase.

Get your instant survey quote

The post The War Office No-Fines House appeared first on Flettons Surveyors.

The Wakefield Special House

flettons — Wed, 25 Sep 2024 09:46:07 +0000

Understanding the Wakefield Special House

Overview

The Wakefield Special house is a form of early system-built housing developed during the 1920s in response to post-World War I housing shortages. These properties were intended to provide affordable, rapidly constructed accommodation for growing industrial populations and returning servicemen.

They are most commonly encountered in northern England, particularly around Wakefield, Leeds, and surrounding towns, where demand for working-class housing was high during this period.

Wakefield Special houses are generally two-storey, semi-detached dwellings constructed using no-fines concrete external walls with a rendered finish. Precise construction records are limited, which is typical for system-built housing of this era.

Key takeaway The long-term performance of a Wakefield Special house is closely tied to the condition of its no-fines concrete walls and external render, both of which require careful inspection due to age-related deterioration risks.

A typical Wakefield Special house with rendered no-fines concrete walls and a medium pitch hipped tiled roof.

Typical characteristics & construction

Wakefield Special houses are usually two-storey, semi-detached properties with a medium pitch hipped roof finished in plain tiles. The external appearance is defined by full render and simple detailing, including brick soldier courses over ground floor openings.

External walls are formed in no-fines concrete, a material selected at the time for its economy and speed of construction. Internal construction details are less well documented, although traditional materials were commonly used for floors and ceilings during the 1920s.

Element	Typical construction	Inspection focus
Substructure	Presumed traditional foundations, possibly concrete	Settlement, cracking, general stability
External walls	No-fines concrete with render finish	Cracking, deterioration, moisture retention
Roof	Medium pitch hipped roof with plain tiles	Tile condition, water shedding, drainage
Floors	Likely timber joists and floorboards	Rot, movement, moisture-related decay
Ceilings	Likely lath and plaster	Sagging, cracking, water staining

Potential hazards & inspection priorities

The principal risks associated with Wakefield Special houses relate to the ageing performance of no-fines concrete. Over time, this material can suffer from cracking and general deterioration, which may affect structural reliability if not properly maintained.

Damp and moisture ingress are also common concerns. Rendered finishes can trap moisture, particularly where maintenance has been poor, leading to internal dampness and associated defects.

Energy efficiency is limited by modern standards due to the absence of original insulation, and there is a recognised risk of asbestos-containing materials being present given the age of construction.

Is this house right for you?

A Wakefield Special house may be considered by purchasers who understand non-traditional construction and are prepared to assess the property on its individual condition rather than age alone.

Commission a detailed building survey
Review evidence of past maintenance and repairs
Allow for upgrading to improve energy efficiency

Mortgage & resale considerations

Mortgage acceptance and resale prospects for Wakefield Special houses depend largely on condition, clarity of construction understanding, and the findings of professional surveys. Lender attitudes can vary, particularly where no-fines concrete is involved.

Clear reporting, documented maintenance, and the absence of unresolved structural or damp issues are commonly influential factors.

What a survey can — and cannot — tell you

A building survey provides an informed assessment of the visible condition and construction of a Wakefield Special house. Inspections are non-intrusive and limited to areas that are accessible at the time of inspection.

Identify visible cracking to no-fines concrete walls and associated render
Assess signs of dampness, moisture ingress, and condensation risk
Comment on roof coverings, drainage details, and external envelope condition
Review the general condition of accessible floors, ceilings, and structural elements
Highlight defects that may require repair, monitoring, or further investigation

However, there are limitations to what a survey can determine without intrusive investigation.

Confirm the condition of concealed elements within no-fines concrete
Assess hidden structural components behind finishes or linings
Determine the full extent of internal concrete deterioration
Inspect areas that are inaccessible or covered at the time of inspection

Where higher-risk indicators are identified, further specialist or intrusive investigation may be recommended.

For a thorough building survey in Greater London, an instant quotation can be obtained through the online survey calculator.

Considering a Wakefield Special house?

A detailed building survey can help clarify construction-specific risks before committing to a purchase.

Get your instant survey quote

The post The Wakefield Special House appeared first on Flettons Surveyors.