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Looking for a warmer, more energy-efficient home?

Find cavity wall installers in Londonderry

With Checkatrade, you can find checked cavity wall insulation installers in Londonderry, compare quotes, and read reviews from real people before you book.

Every tradesperson on our site passes up to 12 checks before joining, and with millions of verified reviews and the Checkatrade Guarantee (covering up to £1,000 for eligible bookings), you can move forward with confidence.

What to expect from hiring cavity wall insulation installers in Londonderry

Cavity wall insulation helps keep your home warmer in winter and cooler in summer by reducing heat loss through external walls. Whether you’re looking for installation, removal, or an inspection, you’ll find the right tradesperson for the job with Checkatrade.

Common jobs requested

• Cavity wall insulation installation
• Cavity wall insulation removal
• Cavity wall surveys and borescope inspections
• Damp checks and remedial work

Average costs to expect

• Mid-terrace: £1,800 on average

• Semi-detached: £2,700 on average

• Detached house: £4,600 on average

Costs vary by property size, wall condition, and insulation material. You can read more in our cost guide.

What’s included in a typical quote

• Initial cavity wall survey or inspection
• Supply and installation of insulation material (e.g. mineral wool, polystyrene beads, polyurethane foam)
• Sealing and making good external walls
• Post-installation checks

Qualifications to check for

• PAS 2030 accreditation (for energy efficiency installers)
• Public Liability Insurance
• Membership of recognised trade bodies

Additional costs to consider

• Damp remediation if issues are found before work
• Removal of old or failed insulation
• Scaffolding for taller properties

Cavity wall insulation in Londonderry: Homeowners vs renters

For homeowners

• You’re usually responsible for organising and funding cavity wall insulation.
• Some properties may need freeholder consent (e.g. leasehold flats).
• Keep records of surveys and installation for future buyers or mortgage lenders.

For renters

• Responsibility usually lies with the landlord.
• If you think your home could benefit, request a cavity wall survey and raise it with your landlord in writing.
• Energy efficiency improvements may be covered by government schemes, but landlord sign-off is required.

Emergency cavity wall insulation in Londonderry

Most cavity wall insulation jobs are planned, but sometimes urgent issues crop up.

• Damp or mould linked to failed insulation
• Blocked cavities causing condensation
• Urgent removal needed before repair works

If you need urgent help, find emergency cavity wall insulation services in Londonderry using our search tool. Or, post a job directly to find trades who can respond quickly.

Find cavity wall insulation services in Londonderry

You can use Checkatrade to book:

• Cavity wall installers
• Cavity wall insulation removal
• Borescope cavity wall inspection
• General wall insulation
• Cavity wall surveyors