Loft insulation · Prescot, Merseyside
Loft insulation in Prescot: 45m² Loft Stripped of Old Fibreglass and Insulated to 300mm
In April 2026, EcoTrust Roofing & Insulation Ltd stripped all the old fibreglass out of a 45m² loft in Prescot, Merseyside, and laid new loft insulation to a full 300mm using 200mm and 100mm Knauf Eko Roll. The team also insulated 5m² of the gable end wall in half a day, backed by a 10-year guarantee.
The problem
The loft floor measured 45m² and still had its old fibreglass insulation. The brief was to take all of it out and start again with a full 300mm of new insulation.
Laying new rolls over old fibreglass leaves an uneven base, and squashed or worn insulation holds far less heat than its depth suggests. Part of the loft also had a gable end wall to insulate, about 5m².
What we did
- Free survey: measured the loft at 45m², checked the existing fibreglass and agreed a written price.
- Removed all the old fibreglass from between the joists and bagged it up.
- Brought in new Knauf Eko Roll in 200mm and 100mm thicknesses.
- Laid new insulation across the 45m² loft floor to a full 300mm.
- Fixed 5m² of insulation to the gable end wall with staples.
- Cleared all the old insulation and waste from site.
The result
The whole 45m² loft floor now has 300mm of new Knauf mineral wool in place of the tired old fibreglass, and the gable end wall has 5m² of insulation fixed to it. The job was done in half a day.
The work is covered by EcoTrust's 10-year guarantee, and the homeowner has photos of the loft for their records.
Loft insulation in Prescot: questions we get asked
Should old fibreglass loft insulation be removed before new insulation goes in?
Often, yes. Old fibreglass that has flattened or broken up holds far less heat and leaves an uneven base. In Prescot we took all the old fibreglass out of a 45m² loft, bagged it and removed it, so the new 300mm of Knauf Eko Roll could sit evenly.
How deep should loft insulation be?
Current guidance for lofts is around 270mm to 300mm of mineral wool. On this Prescot job we laid 300mm in total, using a 200mm roll and a 100mm roll, so the joists are covered and heat cannot escape through gaps along the timber.
How long does loft insulation take?
A typical loft takes a day or less. This 45m² loft in Prescot, Merseyside took half a day, including stripping out the old fibreglass, laying 300mm of new insulation across the floor and fixing 5m² of insulation to the gable end wall.
Is the survey free and how is the job priced?
Yes. An EcoTrust surveyor measures the loft, checks what insulation is up there now and gives you a fixed written price before anything is booked. There is no obligation, and if the job is not worth doing we will tell you so.
Do you cover the rest of Prescot and Merseyside?
Yes. We insulate lofts across Prescot, including Whiston, Rainhill, Huyton and St Helens, and across Merseyside and most of England from our Manchester and Sevenoaks offices. Book a free survey online or call 0800 870 8086 and we will confirm a date.
Need loft insulation in Prescot or nearby?
EcoTrust Roofing & Insulation Ltd surveys for free and gives you a written price before any work is booked. Rated 9.97 on Checkatrade, 4.9 on Trustpilot and 5.0 on Google, with 500+ spray foam removals and 35+ years of combined experience. Fully insured with £5 million public liability and £10 million employers' liability cover.
Get your free quote or call 0800 870 8086
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