Heat Escapes Through The Roof
Warm air rises. Without an even, well-laid layer at ceiling level, a large share of the heat you pay for is lost straight through the roof.
Loft Insulation In South Wales
Inspected properly. Installed cleanly. Quoted clearly.
Warmer rooms and reduced heat loss start at ceiling level. CRS Energy checks your existing insulation depth, loft ventilation, moisture risk and access before recommending the right upgrade for your home.
- PAS 2030 Certified
- Free Loft Inspection
- Insurance-Backed Guarantee
- No Obligation
- Ventilation Checked Before Install
- PAS 2030 Certified
- Free Loft Inspection
- Insurance-Backed Guarantee
- No Obligation
- Ventilation Checked Before Install
Get Started
Book Your Free Loft Inspection
Start with a proper check of your loft, ventilation and access. No obligation.
We Inspect First. We check existing insulation depth and condition, loft ventilation, and any signs of condensation or damp before recommending. If something needs attention first, we will tell you.
PAS 2030 Certified, TrustMark Registered, Insurance-Backed
Inspection Evidence
Loft Heat Loss Is Easy To Miss From Inside
Thin, compressed or patchy insulation, gaps at the joists, and blocked eaves are rarely visible from the room below. A loft inspection shows what is actually happening at ceiling level before any work is recommended.
- Compressed Insulation
- Gaps At Joists
- Blocked Eaves Vents
- Missing At The Hatch
- Uneven Depth
- Condensation Signs
Why It Matters
A Warmer Home Starts At Ceiling Level
Loft insulation is one of the most impactful places to reduce heat loss in a typical UK home, provided it is the right depth, evenly laid, and paired with sensible loft ventilation.
Cold Upstairs Rooms
Bedrooms that feel chillier than the rest of the house are a common sign that loft insulation is missing, thin, or unevenly laid.
Condensation Depends On Ventilation
Insulation alone isn't the full picture. Eaves airflow and balanced ventilation keep the loft healthy once heat loss is reduced.
Common Signs
What We Often See On Site
The signs below frequently point to loft heat loss or a ventilation issue worth checking before insulating further.
Cold Upstairs Rooms
Why It Matters
A common indicator that heat is escaping through the ceiling rather than being held in.
Thin Or Compressed Existing Insulation
Why It Matters
Below current recommended depth, or flattened by storage, means reduced thermal performance.
Frost Patterns On The Roof
Why It Matters
When other roofs stay frosted and yours melts first, heat is leaving the loft faster than it should.
High Heating Use
Why It Matters
If the heating runs hard but rooms still feel cold, ceiling-level heat loss is often a contributor.
Condensation Or Musty Smell In The Loft
Why It Matters
Points to a ventilation or moisture issue that should be assessed before insulating further.
Our Process
1
Free Loft Inspection
We check existing depth and condition, loft ventilation, and any signs of condensation or damp. If something needs attention first, we will tell you.
2
Clear Quotation
A written, property-specific quote based on what we found - covering insulation, walkboards if needed, and any sequencing notes.
3
Installation
Mineral wool laid to current standard depth, eaves ventilation protected, walkboards fitted where storage is required, site left tidy.
4
Aftercare & Guarantee
Installation record, guarantee registration and aftercare guidance handed over on completion. We remain available for any follow-up questions.
Installation Day
What Happens On The Day
Step 01 Of 04
Loft Inspection
What We Check
- Existing insulation depth and condition
- Eaves and loft ventilation
- Any signs of condensation or damp
Timeline
Half To 1 Day
Team
1-2 Installers
Material
Mineral Wool To Current Standard
Guarantee
Insurance-Backed
Payment
Only When Work Is Complete
Document
Completion Pack
Your Completion Pack
Everything documented, so you know exactly what was done and what's guaranteed.
Installation Record
A written record of the work carried out and the depth installed.
Guarantee Registration
Your insurance-backed guarantee, registered on completion.
Depth & Coverage Confirmed
Confirmation that coverage is even, gap-free, and to current standard.
Aftercare Guidance
Guidance on storage, vents and what to look out for over time.
Honest Sequencing
Not Every Loft Is Suitable Right Now
Active leaks, condensation, inadequate eaves ventilation or existing spray foam may need addressing first. CRS also handles ventilation and damp, so we can sequence the work honestly rather than insulating over a problem.
Related: Ventilation & Extraction
Done Properly
Why Correct Loft Insulation Matters
Correct Depth To Standard
Laid to current recommended depth between and across the joists - no shortcuts.
Ventilation Maintained At Eaves
Airflow paths are protected so the loft can still breathe once heat loss is reduced.
Even, Gap-Free Coverage
Continuous coverage with no cold bridges, awkward gaps or compressed sections.
Breathable, Moisture-Aware Approach
Mineral wool that lets moisture pass through, paired with sensible ventilation thinking.
Ventilation Tie-In
A Warmer Loft Still Needs Airflow
Reducing heat loss is only half the picture. Keeping the eaves clear and balancing extraction elsewhere in the home helps moisture move where it should.
Social Housing & Commercial
Void, Tenanted & Communal Lofts
Planned and responsive works across void and tenanted stock and communal lofts, with tenant-safe working and landlord completion documentation as standard.
Pricing
What Affects Your Quote
Every loft is different. We base your written, property-specific quotation on these key variables, confirmed at the free inspection.
Loft Area
Current Depth
Access
Boarding Required
£ Finance
Finance Options:
Spread The Cost
Monthly payment options are available for loft insulation installs and top-ups, provided through our partner Ideal4Finance, with 0% finance available on selected agreements.
Choose a term that suits your household, see the full agreement before you commit, and pay a fixed monthly repayment for the length of the term.
Finance is a regulated credit agreement arranged through Ideal4Finance. You apply directly, the agreement is subject to status, and you'll see the full terms, including the total amount repayable, before you sign anything.
Your Payment Options
Monthly Payment Options
Spread the cost over an agreed term with a fixed monthly repayment.
Full Terms Up Front
Every agreement shows the complete cost and term before you commit.
No Obligation
Finance is a payment option, not a requirement. You can pay for your installation without it.
Find Out If You're Eligible
Enter your postcode below to check your eligibility and explore finance options for your installation.
Evidence-Led Loft Inspection, Certified Install
Every recommendation traces back to something we observed in your loft. We check depth, condition, ventilation and any signs of moisture before quoting, and install under PAS 2030 with an insurance-backed guarantee on completion.
Real Homeowner Reviews
Loved By Homeowners, Trusted By Experts
We're proud to help South Wales homeowners protect the property they live in every day. Here is what some of our customers have shared after working with us.
Independent ReviewsPAS 2030 CertifiedFully Accredited & Insured
The team checked the loft properly before quoting. Clear explanation of what we needed, walkboards added where we store things, and the upstairs is noticeably warmer.
Tidy, friendly team. Spotted a ventilation issue at the eaves and explained how they would protect it during the install. Job done in a day.
4.6
Rated 4.6 On 50 Google Reviews
4.6
Rated 4.6 On 55 Trustpilot Reviews
Transparent Pricing
Every Quote Is Built Around Your Property - Not A Price List.
No guesswork. No off-the-shelf packages. We measure, assess, and quote based on your home's actual floor area and construction type - so you only pay for what's needed.
Floor area (m²)
The primary measure - total heated floor space determines the scope of works.
Insulation type
Cavity wall, loft, internal wall, room-in-roof - each has a different material and labour rate.
Construction type
Cavity, solid brick, timber frame - affects product choice and install method.
How It Works
- 1We attend your property and measure the floor area and external wall areas
- 2We assess construction type and insulation suitability
- 3Your written quotation is issued - priced per m²
- 4No obligation - no hidden extras
Ready To Get Your Quote?
Get in touch and we'll arrange a visit. We'll measure up, assess your property and give you a clear, itemised quote - calculated on your actual floor area.
Frequently Asked Questions
We install to the depth recommended by current UK guidance for mineral wool at ceiling level, laid between and across the joists so coverage is even and gap-free.
Insulation by itself does not cause condensation, but it can change how moisture behaves in the loft if airflow is restricted. We protect the eaves ventilation during install and will flag if additional ventilation is needed before work proceeds.
Yes. Where you need to store items, we fit walkboards above the insulation so it is not compressed underfoot. We confirm the area you want boarded during the inspection.
A typical loft top-up or full installation takes around half a day to a day on site with one to two installers, depending on loft size, access and whether walkboards are included.
Most accessible lofts in sound condition are suitable. Active leaks, untreated damp, inadequate eaves ventilation, or existing spray foam may need addressing first. We confirm suitability at the free inspection and explain any sequencing.
It depends on the condition and depth of what is already there. If the existing layer is sound and well laid, a top-up is often appropriate. If it is compressed, contaminated or unevenly distributed, replacement is sometimes the better option. We base the recommendation on what we see in your loft.
Book Your Free Loft Inspection
Complete the form and we'll arrange your free, no-obligation loft inspection. Or call 0800 009 2992.