External Wall Insulation Failure

[Dudda]

My external insulation has failed. It’s under guarantee so getting replaced at no cost. It was finished 15 months ago. The external render and mesh didn’t bond properly to the EPS and is coming away surprisingly easy. We’re still not fully sure of the cause. It’s an exposed south west facing gable so originally we though water was penetrating in someplace and causing it to bubble in an area. It was only when they started removing the bubble they noticed it was widespread and therefore not a localised water issue. If it was water at the top the render would bond fully under the window cills. We now think it’s most likely frost damage. When the base coat was applied it was very cold and think it froze before it had a chance to dry out.

 

Lesson is don’t apply external insulation in winter or cold weather.

 

[Alexphd1]

Not so good, but on the other hand it's good to see a company stand by their product.

 

Our render guy refused to take on our job until summer stating low temp ( even above freezing) was a disaster.  He was from the south i just presumed he didn't like working in the cold?

Edited April 19, 2018 by Alexphd1

[nod]

4 hours ago, Alexphd1 said:

Not so good, but on the other hand it's good to see a company stand by their product.

 

Our render guy refused to take on our job until summer stating low temp ( even above freezing) was a disaster.  He was from the south i just presumed he didn't like working in the cold?

Unfortunately these things happen with render systems 

 

Most they don’t use if the temperature is likely to fall below +5 

 

But then when the cold weather breaks the rain comes 

 

Three of us put 80 mtrs of render on yesterday afternoon It has baked hard by this morning It’s taken three of us till now to rub down rock hard render 

 

Normally one person would have an easy day doing such a small amount 

 

Hot weather can be worse than the cold 

[gravelld]

So are they only replacing the render/coats, or do they take the boards off too?

[Dudda]

2 hours ago, gravelld said:

So are they only replacing the render/coats, or do they take the boards off too?

The boards are fine. They're only removing the render and mesh. One or two boards may get replaced or additional fixings which got loose in pulling off the render but in general they're left.