Black Vs Blue Damp Proof Membrane

[planemad]

What is the difference between the black and blue damp proof membrane?

In screwfix 4x3m 1200 gauge black membrane is £10

But the Blue 4x3m 1200 gauge membrane is £15

Is there any technical advantages in the blue over black?

 

[noseall]

Not that i know of.

The only thing i can think of is that it costs more to produce 'coloured' plastics and that black is rather susceptible to sunlight.

 

[^woody^]

IIRC, both these types from screwfix meet the same standards.

It may be just me, but blue poly seems to be quite 'stretchy' and it takes a lot to tear it when messing about with it. But in use performance should be the same

 

[cmother1]

The blue stuff is intended for Chelsea fans, hence the higher price.

 

[mikric]

I thought that in the old days blue was thinner than black

 

[hotrod]

I thought that in the old days blue was thinner than black

Funny you should say that Mik. I remember it being the other way round when I worked at a merchants; 1200g - blue, 1000g - black, and 500g - clear.

But that could have been a local policy used to differentiate for the staff as we cut it off the roll and I'm going back 15+ years. Always used blue visqueen on site though and still do.