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Rockwool / Mineral Wool Top-Ups

Rockwool (mineral wool) top-up insulation is one of the simplest and most cost-effective ways to improve your home’s energy efficiency. Over time, existing loft insulation can compress, thin out, or fall below the recommended UK standards — leading to heat loss, cold bedrooms, and higher energy bills.

At ComfySeal Ltd, we provide professional mineral wool top-ups to bring your insulation back to optimal depth, ensuring your home stays warmer for longer.

What's included

Our Top-Up Service Includes

Full insulation depth measurement
Removal of damaged or damp insulation (if required)
Installation of new layers to meet UK standards
Ventilation and moisture checks
Optional combination with multifoil insulation
Clean-up and final inspection

We ensure your insulation meets — or exceeds — modern efficiency requirements.

What are the Benefits

Benefits of Rockwool / Mineral Wool Top-Ups

Better Heat Retention

Stop heat escaping through the roof — one of the biggest sources of energy loss in UK homes.

Lower Heating Costs

Top-ups often lead to immediate reductions in energy usage.

Fast & Clean Upgrade

Most top-up jobs take 1–2 hours with minimal disruption.

Improved Home Comfort

Warmer bedrooms, fewer cold spots, and more stable temperatures.

Ready to Improve Your Home’s Comfort?

Fast response. No-obligation survey.

Frequently Asked Questions

What is a mineral wool top-up? +

A top-up adds extra layers of mineral wool insulation over your existing loft insulation to bring it up to the recommended 270mm depth for optimal energy efficiency.

How do I know if my insulation needs topping up? +

If your existing insulation is less than 270mm deep, or was installed more than 15 years ago, a top-up is likely to significantly improve your home's energy efficiency.

Is rockwool fireproof? +

Rockwool (mineral wool) is non-combustible and can withstand temperatures exceeding 1000C. It provides excellent fire resistance in addition to thermal insulation.

How thick should my loft insulation be? +

Current UK Building Regulations recommend a minimum of 270mm of mineral wool insulation for lofts. Our top-up service brings your insulation to this standard.

Can you install over my existing insulation? +

Yes, in most cases we lay new mineral wool directly over existing insulation. If the existing material is damaged or contaminated, we may recommend removal first.

Rockwool / Mineral Wool Top-Ups