Landlord Damp Proofing Obligations UK 2026 — Rising Damp, Penetrating Damp and Condensation

Types of damp: landlord responsibilities

Three distinct types of damp can affect rental properties, and the landlord's repair obligation differs for each:

• Rising damp: moisture rising through walls or floors via capillary action, caused by a failed or absent damp proof course (DPC). This is a structural defect — the landlord is responsible for repair under Section 11 LTA 1985 and it is a Category 1 HHSRS hazard if severe
• Penetrating damp: moisture entering through the external fabric (roof, walls, windows, pointing). The landlord is responsible for maintaining the structure and exterior, so any defect allowing water ingress must be repaired
• Condensation: moisture from cooking, bathing and breathing condensing on cold surfaces. The landlord still has obligations if the cause is inadequate ventilation, heating, or insulation — all of which are structural issues the landlord controls
• Blaming condensation on tenant lifestyle is no longer a straightforward defence: from 2026, landlords must investigate and act regardless of the probable cause

Awaab's Law: mandatory timescales for PRS from 2026

Awaab's Law introduces specific investigation and repair timescales for damp and mould hazards in the private rented sector under the Renters' Rights Act 2025. The key timescales are:

• Emergency hazards: investigation must begin within 24 hours of report; repair work must start within 7 days
• Serious (non-emergency) hazards: investigation must begin within 14 days of report; a written report must be provided to the tenant; repair work must begin within 7 days of the investigation report
• All other damp/mould reports: must be responded to within a reasonable period, with a written record kept
• Failure to meet these timescales is enforceable by the tenant through the courts, and local authorities can issue compliance notices
• The tenant does not need to prove injury or harm — the hazard itself triggers the timescale

Section 11 Landlord and Tenant Act 1985

The foundational landlord repair obligation for damp is Section 11 LTA 1985, which applies to most residential tenancies. It requires landlords to:

• Keep the structure and exterior of the dwelling in repair (includes roofs, walls, drains, gutters, external pipes, windows and doors)
• Keep in repair and proper working order the installations for space and water heating
• Keep in repair and proper working order the installations for water, gas, and electricity supply
• Rising damp (failed DPC) and penetrating damp (defective fabric) are both structural issues the landlord must remedy
• Condensation damp where caused by defective or inadequate heating, ventilation or insulation also falls on the landlord

Housing Health and Safety Rating System (HHSRS)

Local authorities assess damp and mould hazards using the HHSRS under the Housing Act 2004. Damp and mould growth is one of 29 HHSRS hazard categories. A Category 1 hazard (the most serious rating) obligates the council to take enforcement action. Enforcement can include:

• Improvement notice requiring the landlord to remedy the hazard within a specified period
• Prohibition order preventing use of all or part of the property
• Emergency remedial action: the council carries out works and charges the landlord
• Emergency prohibition order where the hazard presents an imminent risk to health or safety
• Civil penalty of up to £30,000 in lieu of prosecution for specified HMO-related offences
• Housing disrepair claims: tenants can also sue the landlord for damages where damp causes personal injury or property damage

Damp proof course (DPC): landlord obligations

A failed or absent damp proof course is a structural defect. The landlord's obligations are clear:

• Install or replace the DPC as necessary to maintain the structure in repair
• A DPC can be chemical injection, electro-osmotic, or a physical barrier depending on the wall construction
• Replastering above a new chemical DPC is required as part of the remedial works — fitting a DPC and leaving contaminated plaster is not a complete repair
• Keep a record of DPC works, contractor details, method statement and guarantee for at least the duration of the tenancy
• A new DPC typically carries a manufacturer's guarantee of 10–25 years — hold this on file for the property

Condensation management: what landlords must do

Even where condensation is partly driven by tenant behaviour, landlords have structural obligations that must be addressed first:

• Ensure adequate ventilation: extractor fans in bathrooms and kitchens must be working; trickle vents in windows must not be blocked
• Ensure adequate heating: the Minimum Room Temperature guidance requires the main living room to reach 21°C and bedrooms 18°C
• Ensure insulation is adequate: cold bridge points (uninsulated steel lintels, concrete floor edges) cause surface condensation that is a landlord responsibility to address
• Provide written information to tenants on ventilation and heating — this does not absolve you of structural obligations but demonstrates proactive management
• From 2026, receiving a damp/mould report triggers mandatory Awaab's Law timescales regardless of cause

Evidence and record-keeping

Landlords should maintain comprehensive records for damp-related issues:

• Photographs of all damp and mould at the time of report and at each inspection
• Written correspondence with tenants (email is acceptable) noting date of report and action taken
• Contractor reports, surveys, and completion certificates for any damp-proofing works
• Records of investigation visits: date, who attended, findings
• Tenant information provided on ventilation and heating use
• Building surveys or damp surveys where the cause is unclear — a written survey provides evidence of the diagnosis and appropriate remedy

Frequently asked questions