Sealant externally around windows - Silicone Render

[Jothetaxi]

We had a surveyor undertake a building snag survey post build.  One of the (many!) things he picked up was the windows were not sealed externally. The house has silicone render applied to thermal insulation boards. We believe SPS Envirowall was the brand used (but to be honest who knows with our builders!).

 

Windows are Residence 9 UPVC windows.  The window installer/supplier is saying that customers do not generally have their windows silicone sealed around the external edges, as they already have silicone render applied to the edge of the window frame. What are your thoughts on this? we thought that if a chartered surveyor picks this up then it must be important.  To be fair the window company is via the contractor (but at our request).

 

Any thoughts gratefully received.

 

[Nickfromwales]

54 minutes ago, Jothetaxi said:

The window installer/supplier is saying that customers do not generally have their windows silicone sealed around the external edges, as they already have silicone render applied to the edge of the window frame.

Two entirely different things!

 

The weather sealing is fundamental, so absolutely should have been done. They (or you) can now use a clear UV stable mastic to do this, or employ a "mastic man" who will not come with fat thumbs and make a mess of this in anger.

 

If the work is offered up as snagging, state before work commences that you don't want the sealant looking like Ray Charles did it.

[craig]

It's a difficult thing, especially new builds when mastic isn't always possible at the point of installation for numerous factors. I always allow for this to be done by the contractor or appointed mastic man.

[Nickfromwales]

1 hour ago, craig said:

It's a difficult thing, especially new builds when mastic isn't always possible at the point of installation for numerous factors. I always allow for this to be done by the contractor or appointed mastic man.

Amen.

[Jothetaxi]

Thanks for the replies. 
Yes, I think we will seal the windows. The window company are sending a mastic guy - thank goodness. mastic guy has suggested white to match the windows. 

One angry builder already came back and sealed an expansion joint in the brickwork and it looks awful. Mastic guy said he would take it out and redo it for us. 
 

I take it angry builders coming back to do snagging items is a recognised thing then? Thought it was just us! 

[craig]

Anyone that is sent back for snagging are angry. It’s like a slap on the wrists for not doing it right in the first place and it’s at there’s or the companies cost usually.

 

It’s why I recommend the last day is a snagging day, a walk around with the customer or contractor to ensure they are happy and then sign off the install.