Roof Insulation Hampshire
Roof Insulation Services in Hampshire
Roof insulation reduces heat loss through your home’s largest exposed surface. At Loft Insulation Specialists, our professional roof insulation installations using Knauf Earthwool and Superfoil cut energy bills by up to 35% annually. Here’s everything you need to know about costs, types, regulations, and what to expect from us as your local roof insulation specialists in Hampshire.
How does roof insulation save on energy bills?
Our roof insulation using Knauf Earthwool or Superfoil prevents warm air escaping through your property’s highest point – where heat rises naturally and accounts for around 35% of home heat loss. Here’s exactly how it delivers annual savings of £200–£400.
Creates an Effective Thermal Barrier
Pitched roof insulation between or over rafters with Knauf Earthwool stops heat escaping during winter, keeping your home warmer for longer.
Reflects Radiant Heat Back Indoors
Superfoil’s foil layer bounces radiant heat back into living spaces instead of letting it pass through the roof structure.
Eliminates Heat Loss at Roof Junctions
Knauf Earthwool fills gaps perfectly between rafters, preventing sneaky cold air infiltration at eaves and tricky angles.
Reduces Overall Heating Demand
Proper insulation cuts your heating needs by up to 35%, meaning your boiler works less while maintaining comfortable temperatures.
Improves Summer Cooling Efficiency
Superfoil reflects solar heat away during warm months, reducing reliance on fans or air conditioning in upper rooms.
What are the best types of roof insulation?
Hot roof insulation with Knauf Earthwool placed directly against the underside of roof tiles creates a warm loft space. Timber frame roof insulation fills cavities between rafters with our mineral wool for excellent thermal performance. Superfoil adds summer roof insulation benefits by reflecting radiant heat to keep upper floors cooler during warm months. The best choice depends on your loft usage plans and existing roof construction – we’ll recommend what’s right for you.
How much does roof insulation cost?
Our Superfoil roof insulation costs range from £1200 to £1800 depending on your property size. Our Knauf Earthwool roof insulation costs range from £900 to £1200 depending on your property size. We’ll survey your property and provide accurate pricing with multiple quotes to compare specifications and total project costs before committing.
Does roof insulation require building regulations approval?
Building regulations for roof insulation ensure your installation meets essential safety, thermal performance, and energy efficiency standards. At Loft Insulation Specialists, we’ll handle the full building control process using Knauf Earthwool and Superfoil to secure seamless approval for your Hampshire property.
- 1
Initial Roof Insulation Survey & Planning
We conduct a detailed survey to assess your current roof construction and determine required U-values under Part L regulations.
Submit specifications for Knauf Earthwool (300mm depth) or Superfoil thin-profile installations with ventilation calculations.
Confirm whether flat roof upgrades or pitched roof cavity work triggers mandatory notification.
- 2
On-Site Installation & Inspection
Building control visits verify insulation depth, vapour barriers, and 25mm eaves ventilation gaps are correctly installed.
Check the insulation fills rafters completely without compression for optimal thermal performance.
Ensure any reflective layers and sealed joints meet fire-rated requirements.
- 3
Final Certification & Compliance
Post-installation inspection confirms all elements achieve target U-values (0.16 W/m²K for new standards).
Receive official completion certificate for EPC upgrades and property records.
Full documentation provided for insurance, resale, or future maintenance verification.
Are there grants available for roof insulation?
Free roof insulation is available through government schemes for qualifying households. ECO4 funding covers roof insulation grants for homeowners receiving certain benefits or living in low-EPC properties. Roof insulation for extension projects or loft conversion work can also attract funding when combined with other energy efficiency measures. Check eligibility through your local authority or energy supplier – we’ll help you explore options.
Why Choose Loft Insulation Specialists for Roof Insulation in Hampshire?
Award-Winning Insulation Services
We have been recognised as the 'Best Insulation Installation Firm Hampshire - 2023' by the Southern Enterprise Awards, an independent awarding body.
Guaranteed energy savings
We guarantee up to 35% lower energy bills by slashing heat loss, backed by our free survey, transparent results and full satisfaction pledge - if your home isn't noticeably warmer, we fix it free.
Proven Accredited Reliability
Checkatrade and Google reviews from Hampshire locals verify our punctuality, spotless sites and top-quality services - independent proof we deliver every time.
True Local Hampshire Experts
Fast same-week surveys and quotes, as well as tailored solutions for local projects mean quicker installs and better results than out-of-area firms.
40+ years of experience
With over 40 years of experience in insulation and home improvements, our team quickly diagnoses issues, gives better advice, and delivers installations done right the first time.
No-obligation surveys
Our surveys are always free with zero obligation. No high-pressure sales or jargon: just straightforward facts and options, respecting your decision every time.
Frequently asked questions
Take a look at the Frequently Asked Questions regarding our Roof Insulation service.
What ventilation is needed with roof insulation to prevent condensation?
Roof insulation ventilation stops moisture building up within your roof structure. Fire rated roof insulation products like Knauf Earthwool maintain airflow paths required by building regulations. Cold roofs need 25mm continuous ventilation at eaves level running the full length of the roof. Warm roof systems with Superfoil seal the structure completely, eliminating the need for ventilation gaps.
Can roof insulation be installed over existing spray foam?
We specialise in spray foam removal first, then installing Knauf Earthwool or Superfoil over cleared roof spaces for lender-safe, regulation-compliant results. This ensures stable, well-adhered new insulation without compatibility issues. Many mortgage lenders reject properties with spray foam, so removal followed by our professional installation is often the best long-term solution.
How thick should roof insulation be for UK regulations?
Roof insulation thickness requirements aim for U-values of 0.16 W/m²K in new builds. The UK government recommends a minimum of 270mm, but at Loft Insulation Specialists we install 300mm of Knauf Earthwool on loft floors to exceed standards and deliver superior efficiency. Between-rafter installations using Superfoil achieve compliance in thinner profiles. We’ll specify appropriate depths during your survey.
Will roof insulation affect my home's EPC rating and resale value?
Our roof insulation EPC upgrade moves properties up the energy performance scale, often by two or more bands. Rigid roof insulation installations with Knauf Earthwool demonstrate commitment to energy efficiency that buyers value. Mineral wool roof insulation upgrades from pre-2000 levels can shift homes from D or E ratings into the B-C range. Higher EPC ratings correlate with increased property values and faster sales times.
What warranty comes with professional roof insulation installation?
Our roof insulation warranty periods range from 10 to 25 years depending on material and installation. Knauf Earthwool and Superfoil insulated roof panels carry manufacturer guarantees separate from our labour warranties. Flat roof insulation boards typically include 20-year performance guarantees when installed to specification. We’ll explain both manufacturer backing and our workmanship warranties before you agree.