Loft Insulation Top Ups

Add 100 mm · 150 mm · 200 mm over existing layers to hit the 270 mm building regulation target.

⚡ Fast install 💰 Lower bills 📈 Better EPC ✅ Knauf certified

Select your top-up thickness

Current depth: 150 mm
Suggested top-up: 120 mm

Target depth: 270 mm (UK building regulation)

Estimate your annual savings

Approx. saving with top-up: £240 /year

Choose your upgrade

100mm

Light boost

Great for recently relaid lofts

150mm

Balanced

Ideal for moderate shortfall

200mm

Maximum

For older or under-insulated lofts

Our top-up process

  1. 1) Survey & measure — Confirm existing depth and moisture status.
  2. 2) Prep & safety — Protect wiring, pipes and access points.
  3. 3) Layer additional insulation — Add 100 / 150 / 200 mm Knauf to reach target depth.
  4. 4) Certificate & clean-up — Provide proof of 270 mm compliance.

Before & after comparison

Add before and after images to create your comparison

Top-up installations across Yorkshire

York Leeds Sheffield Kingston upon Hull Bradford Ripon Harrogate Wetherby Wakefield Doncaster Huddersfield Pickering
Book your top-up survey

Top-up FAQs

Can I top up over damp insulation?

No — existing insulation must be dry and within lifespan. We'll check at survey.

Will a top-up void my warranty?

No — it extends energy efficiency; we provide a completion certificate.

How long does installation take?

Most homes: 2–4 hours depending on size and access.

What thickness is best?

Enough to reach 270 mm total. We recommend 100–200 mm depending on your current depth.