Defects may occur because of:
- Design deficiencies.
- Product or material deficiencies.
- Poor specification.
- Workmanship deficiencies.
- Maintenance deficiencies.
- Changes of use.
- Environmental influences.
A National New Home Customer Satisfaction Survey undertaken by the Home Builders Federation (HBF) and the National House Building Council (NHBC) in 2015, found that 93% of buyers reported problems to their builders, and of these, 35% reported 11 or more problems.
Defects in new buildings may be attributable to designers, suppliers or contractors, and may result in a claim. In addition, during the first 12 months or so after completion (depending on the terms of the construction contract), the contractor may be required to remedy defects during a time commonly referred to as the 'defects liability period', and beyond that there may be some form of ongoing warranty.
In addition, irrespective of contractual obligations, the Defective Premises Act 1972 provides that a person taking on work for, or in connection with, the provision of a dwelling owes a duty to the person acquiring the dwelling and subsequent purchasers to see that the work which they take on is done in a workmanlike or professional manner, with proper materials so that it will be fit for habitation when completed.
However, defects in older buildings may not be clearly attributable to a particular party, but may result from a change in circumstances or use, an environmental impact, poor maintenance and so on, or from a combination of factors.
- Carbon monoxide emissions.
- Cold bridge.
- Contaminated land.
- Cracking and building movement. (see also: Ground heave / Settlement / Subsidence).
- Damp (see also: Penetrating damp / Rising damp)
- Condensation (see also Interstitial condensation)
- Defects in brickwork (see also: Efflorescence / Spalling).
- Defects in dot and dab.
- Defects in stonework.
- Dry rot.
- Flooring defects.
- Hazardous substances (See also: Asbestos).
- Indoor air quality.
- Mould growth.
- Roofing defects (See also: Flat roof defects).
- Sick building syndrome.
- Wall tie failure.
- Wet rot.
Other common problems may include:
- Defective chimneys.
- Defective rainwater fittings, plumbing or drainage.
- Defective windows.
- Defective wiring.
- Defective plumbing.
- Inadequate ventilation of the sub-floor or roof space.
- Excessive energy consumption.
- Poorly installed insulation.
- Poorly installed or absent damp proof course.
- Decayed or damaged windows and doors.
- Sound transmission.
- Encroachment by trees.
- Chimneys that have been blocked up, but not filled.
 Find out more
 Related articles on Designing Buildings Wiki
- Building pathology.
- Certificate of making good defects.
- Defective Premises - Liability and Measure of Damages.
- Defective Premises Act.
- Defects liability period.
- English housing stock age.
- Flat definition.
- Housing Defects Act 1984.
- Remedial work.
- Residential definition.
- Schedule of condition.
- Schedule of defects.
- Scott schedule.
- Types of dwelling.
- Types of household.
- Use class.
 External references
The IHBC lists quality providers of education and learning in the historic built environment, and emails a monthly recap of their upcoming events.
On Læsø, houses are thatched with thick, heavy bundles of silvery seaweed that have the potential to be a contemporary building material around the world.
For the first time in its history, England’s largest festival of heritage and culture will feature online events as well as in-person activities. Heritage Open Days (HODs) returns in September, thanks to support from players of People’s Postcode Lottery.
The Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA) shows the scale of the ‘missed opportunity’ if we continue to separate heritage policymaking and economic policymaking.
The resource format has proved to be a successful way of providing guidance for local authorities on crucial policy topics.
Insight into the smart ways to design building services to ensure they perform as designed without being over-engineered
Historic England (HE) has awarded £250,000 towards the restoration of the Union Chain Bridge, built in 1820, spanning the River Tweed near Berwick.
One of Ireland’s most distinguished architectural historians explores the differences between ‘restoration’ and ‘repair’ and Conservation ethics in issue 163 of CONTEXT.
Architects say buildings should be protected – to fight climate change, reports the BBC on recent evidence given to the Commons Environmental Audit Committee (EAC).
It includes articles on Rethinking Retrofit to not waste carbon and not damage buildings, Assessing Moisture in porous building materials, conserving the Burns Monument using lime grout and injection mortars, Curated Decay, and more.