Improve Comfort and Reduce Energy Bills with Professional Party Wall Insulation
If you live in a semi-detached or terraced home, you likely share at least one party wall with a neighbouring property. While these walls are essential for separating homes, they can also be a major source of heat loss and noise transmission, especially if your home was built before the 1990s.
At Surveying Cymru, we provide professional party wall insulation services for homeowners and landlords who want to improve thermal comfort, reduce energy bills, and boost energy efficiency. Working alongside trusted partners, we deliver industry-leading solutions that are quick, non-intrusive, and fully compliant with UK building and energy standards.
What Is a Party Wall and Why Insulate It?
A party wall is a dividing wall between two attached properties, such as semi-detached or terraced houses. In homes built before 1990, these walls were often constructed without insulation, leaving a cavity space that allows air to move freely between the properties. This airflow causes:
- Heat loss up the cavity and out through the roof
- Cold bridging, resulting in cold spots and condensation
- Noise transmission between neighbouring homes
- Reduced overall energy efficiency
WHAT OUR CLIENTS SAY
How Party Wall Insulation Works
Modern party wall insulation involves filling the cavity between properties with specialised bonded bead insulation, such as carbon bead, to stop heat loss and improve acoustic separation. The process is typically non-intrusive, involves minimal drilling, and can be completed in just a few hours.
Think your party wall is uninsulated? Contact Surveying Cymru today to arrange an expert survey.
Benefits of Party Wall Insulation
Warmer, More Energy-Efficient Homes
Uninsulated party walls can account for up to 5% of heat loss in your home. By adding high-performance insulation, you create a sealed barrier that keeps heat in. This makes your home warmer and more comfortable all year.
Lower Energy Bills
With better heat retention, your central heating won’t have to work as hard. According to industry estimates, party wall insulation could save households up to £90 per year on heating costs.
Reduced Noise Between Homes
Insulation materials like carbon bead not only prevent heat loss, they also reduce airborne noise. Whether it’s loud TVs, music, or general chatter from next door, a properly insulated party wall adds a valuable layer of soundproofing.
Lower Carbon Footprint
Improved energy efficiency means reduced energy consumption, helping to cut carbon emissions and make your home more environmentally friendly.
Increase Property Value
Upgrading your insulation is one of the simplest ways to boost your Energy Performance Certificate (EPC) rating, making your home more attractive to buyers and tenants.
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Who Should Consider Party Wall Insulation?
Party wall insulation is especially beneficial if:
- Your home is semi-detached or terraced, particularly if built before 1990
- You’ve noticed cold spots on shared walls
- You’re experiencing condensation or mould growth
- You frequently hear noise from adjoining homes
- You’re a landlord seeking to improve EPC ratings for lettings
- You want to improve comfort without major renovation work
At Surveying Cymru, we work with:
- Homeowners across South Wales, Gloucestershire and Herefordshire
- Private landlords and property investors
- Housing associations and Registered Social Landlords (RSLs)
- Retrofit specialists working on insulation upgrades and energy assessments
Book a no-obligation survey today. We’ll help you discover if party wall insulation is right for your property.
Our Party Wall Insulation Process
Step 1: Initial Survey & Assessment
One of our qualified surveyors will visit your property to check if the party wall cavity is present, accessible, and suitable for insulation. We use tools like borescopes and thermal imaging to make an accurate diagnosis.
Step 2: Expert Recommendation
Based on the survey, we’ll provide a clear and honest recommendation, including whether insulation is needed, the best material for your home, and any funding options available.
Step 3: Professional Installation
Insulation is typically installed through as few as four small external holes, with minimal mess or disruption. The average installation takes 2–3 hours.
Step 4: Guarantee & Sign-Off
All insulation work is backed by a 25-year CIGA guarantee, giving you peace of mind that the installation is both high quality and long-lasting.
Installation is quick, clean, and requires no scaffolding or internal access making it ideal for busy households.
FAQs About Party Wall Insulation
Is Funding Available for Party Wall Insulation?
Yes. Thanks to ECO4 funding and GBIS (Great British Insulation Scheme), many households may qualify for fully or partially funded insulation.
Depending on your property and circumstances, you may be eligible if you:
- Claim certain income-related benefits
- Have a low EPC rating (D, E, F or G)
- Live in a qualifying postcode area
- Are over a certain age or have health conditions linked to fuel poverty
Surveying Cymru and our partners can help check eligibility and guide you through the funding
Does every semi-detached or terraced home have a cavity party wall?
Not always. Some party walls are solid masonry or built without a cavity. A professional survey will confirm if your wall is suitable.
Is party wall insulation disruptive?
Not at all. The system is designed to be non-intrusive, no internal mess, no scaffolding, and typically finished within half a day.
Will the insulation affect my neighbours?
No. The insulation is inserted into your side of the wall only. No internal access is required, and your neighbours won’t be affected
Ready to Upgrade Your Home’s Energy Efficiency?
If you’re looking to reduce heat loss, improve soundproofing, or simply lower your energy bills, party wall insulation is a simple, cost-effective way to make a big impact.
Call: 01600 715350 Email: nick@surveyingcymru.co.uk
Surveying Cymru – Trusted surveyors delivering expert insulation solutions for homes across South Wales, Gloucestershire and Herefordshire.