Walrock thermal lining paper for cold rooms

[michealangelo]

Anyone found this to be effective ?

 

[Wayners]

With the thin polystyrene rolls with wallrock over to make surface tuffer, yes.
Not something I think is a long term solution.
Better to fit insulation and plasterboard over the wall then skim.

 

[noseall]

Anyone found this to be effective ?

It can have an effect on surface temperature, thus helping reduce some condensation issues. It won't do a lot for the overall insulation/heat loss of a room though, no.

 

[robinbanks]

It has a lambda value of 0.039, approximately the same as mineral wool. Given that UK regs for lofts need around 270mm of wool, and for walls between 150 and 200mm, consider that you're adding just 3mm of insulating material that is about as good as wool

At £60 per 7.5sqm roll, and 3.2mm thickness you're buying 0.024 cubic metres of insulating material, which works out at £2500 per cubic metre. By comparison a sheet of kingspan from wickes (i.e. expensive as possible) is £47 for 0.288 cube; that's £163 per cubic metre for insulation that is twice as performant

I highly doubt that adding 3mm of material equivalent to wool will ever pay back the £60 a roll costs, and do weigh up the eyewatering cost versus buying insulation that would actually make a tangible difference (lining your walls with 50mm of PIR)

 

[mikeey84]

I used it in a room that suffered condensation issues in corners that were not well ventilated, and are solid construction.

It went mouldy slightly more slowly than the wall did.

I wouldn't recommend it, and I'm fitting a PIV unit instead to prevent mould growth issues

 

[michealangelo]

With the thin polystyrene rolls with wallrock over to make surface tuffer, yes.
Not something I think is a long term solution.
Better to fit insulation and plasterboard over the wall then skim.

That's going to bring the wall ...in ....quite some

 

[michealangelo]

I used it in a room that suffered condensation issues in corners that were not well ventilated, and are solid construction.

It went mouldy slightly more slowly than the wall did.

I wouldn't recommend it, and I'm fitting a PIV unit instead to prevent mould growth issues

Sorry what's a PIV unit ?

Maybe a small dehumidifier used on a regular basis is more realistic and , of course , liberal use of heating

It's actually my bedroom and if its not insulated that well ...then unless I do that .....its just the way it is

 

[mikeey84]

Positive input ventilation. It's basically an extractor fan that runs in reverse. You tend to put it in the stairwell of the building, with the main unit in the loft above.

It pumps in cold, but dry, air, usually overnight, which reduces the risk of condensation and mould

 

[michealangelo]

It has a lambda value of 0.039, approximately the same as mineral wool. Given that UK regs for lofts need around 270mm of wool, and for walls between 150 and 200mm, consider that you're adding just 3mm of insulating material that is about as good as wool

At £60 per 7.5sqm roll, and 3.2mm thickness you're buying 0.024 cubic metres of insulating material, which works out at £2500 per cubic metre. By comparison a sheet of kingspan from wickes (i.e. expensive as possible) is £47 for 0.288 cube; that's £163 per cubic metre for insulation that is twice as performant

I highly doubt that adding 3mm of material equivalent to wool will ever pay back the £60 a roll costs, and do weigh up the eyewatering cost versus buying insulation that would actually make a tangible difference (lining your walls with 50mm of PIR)

Sorry is PIR like kingspan ?

 

[robinbanks]

Positive input ventilation

A crazy idea; let's fit a fan to pressurize the house with cold outside air, forcing all the warm, humid air into the building fabric where it can condense and cause invisible problems.

And let's then run the heating to counteract blasting cold air into the house

-

It's easier and cheaper than an MVHR, but for good reason

Sorry is PIR like kingspan ?

Yes. Rigid board insulation like Kingspan or Celotex is typically PIR or PUR. Higher performance variants (like phenolic) exist, but they typically aren't as good value

That's going to bring the wall ...in ....quite some

C'est la vie! Compromises usually have to be made somewhere when retrofitting to meet a particular goal

 

[mikeey84]

I'm no engineer, but I'm pretty sure a 4inch fan in a ceiling wont pressurise a house and force damp air anywhere apart from through the various vents, cracks and gaps that exist in most houses with solid walls.

Basically just forced ventilation, not that different to opening a window or having door or window vents, just controllable.

Plus most models come with a heater

 

[Wayners]

Other option although I know little about it.
Spray cork insulation. Can be applied inside or out.

 

[michealangelo]

Other option although I know little about it.
Spray cork insulation. Can be applied inside or out.

Will look into that cheers