In Stock, Earliest dispatch 13th July
Recommended Adhesive
Average usage - 1kg per roll
Recommended Adhesive:
Wallrock Thermal Liner Adhesive
Adhesive Usage:
1kg (On Average)
Substrate:
Polystyrene
Roll Size:
10m x 50cm Wide
Roll Coverage:
5 Square Metres
Our Heatsaver Wall Underliner by Saarpor, is an economical way to provide a basic layer of insulation for walls and ceilings. It will help keep your home warm and also slightly reduce sound transference between walls. Another advantage of using Polystyrene Insulation is that it covers minor cracks and wall imperfections.
Because it is a Paste the Wall product, hanging Insulation Polystyrene is a simple process. Simply apply WallrockThermal Liner Adhesive to the wall with a brush or roller and offer up the Polystyrene. Once on the wall allow to dry naturally and then hang Wallrock Fibreliner Original, Smooth or Ultracover over the top for a completely smooth surface.
If you need more than just a basic insulation solution, take a look at Wallrock Thermal Liner which the most effective insulating lining paper on the market.
Important Safety Information
Compliance with Building Regulations;
This product should not be used in isolation for projects such as new builds and extensions where Building Regulations are applicable. If used as part of a system that both adds to the insulation value and protects the surface from fire it may be compliant but expert advice should be sought.
Fire Safety
When used in isolation this product is suitable as a localised ‘problem solver’ for cold external walls and is not recommended for use in fire escape routes or on ceilings.
Fire resistance can also be improved significantly by cross lining the surface with Wallrock Fireliner applied with Fireliner FR Adhesive
Preparation
Surfaces painted prior to 1960 may contain lead pigments and special precautions should be taken when preparing such surfaces.
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4.9 / 5 from 30 reviewsMr G North
14/04/2026
Good product , no complaints about it .
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Waleshols
30/01/2026
Adds some insulation as well as smoothing the wall
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Grahame Robinson
03/11/2025
It's somewhat delicate, I've used the paper backed polystyrene and it's better, but more expensive. I ordered this by mistake, but it's not a bad product, certainly insulates well
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Noleen Herron
08/04/2025
It’s great an leave a warm touch to the wall
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David Woodland
05/02/2025
Gives a nice warm feel to internal walls, I wish I had gone for the thicker insulation though.
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John Scott
28/10/2024
A little fragile to work with but when it’s on it certainly does the job
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Joe G
14/09/2024
Ideal product for cold walls, wouldn't buy anywhere else
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CHERYL
04/09/2024
Provides good insulation and covers damaged plaster well.
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LYNN ALLISON
16/08/2024
Great products
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Jayne S
07/05/2024
Value for price
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Cleo Gregory
30/04/2024
Amazing product used on uneven old stone cottage walls- made a massive difference to the cold walls, warm to the touch after 5 winter months in an empty property without any heating on. Also evened out very rough walls. Very impressed with this product.
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Paul
17/04/2024
Useful product for giving a element of insulation + covering small cracks etc.
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Jan Finbow
09/04/2024
Well worth the effort does what it says
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Jayne Pendleton
22/03/2024
Fast delivery and good value for money
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Sarah Lewis
20/02/2024
Wow, did not expect the results we got! Really does make the wall warm to touch, and hides a multitude of imperfections. Does snap / tear easily so took a couple of goes to get this right. Having said that it’s very forgiving and easy to lightly fill any small gaps. Just preparing for stage 2 - covering with lining paper.
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KevinJKtheman
29/01/2024
Excellent service
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Joe G
25/11/2023
Easy to hang and competitive price
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elizabeth j dunn
08/11/2023
Easy to use quick to put up.
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Joe G
03/11/2023
Very competitive price
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Independent traveller
15/10/2023
Good quality product.
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