Does this keep outside noise from entering the room through the windows? (planning on building a barrier on the windows)

Hi "No". I think rockwool is more for... reducing cold air, for making rooms more warm but not really for reducing noise. It is often used in lofts to insulate, to make warmer. For noise solution, You may find a special "acoustic wool" online. Hope this helps

can it be used as a thermal insulation

I bought this as a filler between air bricks to stop the draft. But they do breath. If you want thermal insulation on a large scale to do a room. I would have thought a thermal backed plaster board would be a better option. Like a dry linning board. Hope this helps.

Does this keep outside noise from entering the room through the windows? (planning on building a barrier on the windows)

It will help but you would be better using heavy wooden shutters.

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🔥 Silence, Safety & Comfort — Insulate Like a Pro!

BUILT TO LAST - Durable stone wool construction resists moisture, damp, and rot for long-term reliability.
STAY COOL COZY - Exceptional thermal insulation keeps your environment perfectly temperature-controlled year-round.
SILENCE THE NOISE - Industry-leading acoustic performance transforms noisy spaces into tranquil retreats.
FIREPROOF YOUR SPACE - Non-combustible A1 Euroclass rating ensures ultimate fire safety and peace of mind.
EFFORTLESS INSTALLATION - Lightweight, water-repellent slabs designed for quick, hassle-free fitting in any project.

Rockwool RWA45 Acoustic Insulation Slabs (75mm, 4.32m² per pack) deliver premium thermal, acoustic, and fire protection with an A1 Euroclass non-combustible rating. Crafted from durable stone wool, these water-repellent slabs resist moisture and maintain performance over time, making them the go-to solution for professional-grade insulation in floors, walls, and ceilings.

Reviews

M**M

Great quality and next day delivery.

Exactly as expected but delivered in a day, not in 7-8 days as predicted. Excellent service. Thank you.

2.05.2025

A**R

great stuff

Its very pliable

9.11.2024

J**O

NOT what the product described

I purchased this item based upon the description only to discover that it certainly did not meet the expectations of the description. I was led to believe these were slabs with some degree of rigidity to them. This was not at all the case - they were extremely floppy with no capacity to stand upright without lots of support. As a result of this I had to seriously modify my plans in building a recording studio. It was extremely annoying as I had opened up the product and partly put my build into action before fully realising the problem so felt unable to pack it up and send in back, not least because I was working to a deadline. I'm sure this stuff is OK if you're using it to insulate a loft, but it's very unfriendly if you're wanting to soundproof walls.

3.06.2020

D**Y

Good whenn

Does the job. I needed a small amount to use for dividing walls and under floors when itching up a house.

13.03.2020

C**N

Does the job

Nothing to complain. First of all the product was delivered 5 days early than usual. Did the job.Nice one.

27.05.2020

L**.

Rockwool.

Arrived as advertised.

4.06.2020

M**N

4.06.2021

D**0

Worth the money

Just what I needed. Done the job .

15.03.2021

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Manufacturer	buildermerchant.com
Part Number	Rockwool RWA45 75mm
Product Dimensions	120 x 61 x 41 cm; 8 kg
Batteries	Product Specific batteries required.
Item model number	Rockwool RWA45 75mm
Size	75mm (4.32m2 per pack)
Colour	N / a
Material	Stone wool
Thickness	75 Millimetres
Item Package Quantity	1
Number of Pieces	1
Coverage	thermal, acoustic, fire
Included Components	Rockwool RWA45 75mm
Batteries included?	No
Batteries Required?	No
Item Weight	8 kg

Rockwool RWA45 Acoustic Insulation Slabs | 75mm (4.32m2 per Pack)

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