What shoud be done on the edge of the door the unexpanding form is crumbly

[Mubbashshir]

If you look at the edge of the door, the orange material you see is non-expanding foam, but it has started to crumble. This foam was used to fill the gap between the door frame and the wall. A mastic installer is scheduled to come, but I don’t know when. Please advise if I need to do anything in the meantime to prevent air gaps or cold drafts before the mastic is applied.

[Big Jimbo]

Expanding foam. The cheap stuff you buy at the sheds, is not really suitable for around windows and doors. It's been there for some time, by the look of it, as it has started to decay. You need to get that mastic done as soon as possible as a minimum. Did they fill the gap under the bottom of the door with a bit of sand and cement ?

[marshian]

I'm quite impressed it's been "foamed" - most window/door fitters bang in the window or door and then cover the gap with a bit of trim held there by a thin bead of silicone

 

I think most "Expanding Foam" products break down with UV so left exposed like that it will degrade over time - so needs covering with suitable silicone/mastic

 

I especially like that the packers are still in place!!!!

[JohnMo]

I would scrape out what you can and replace with a good airtight expanding foam. The foam will discolour with UV, but generally not an issue, especially as we move to winter.

[jack]

@Mubbashshir, I've merged the two threads you started on this topic.

[Mubbashshir]

1 hour ago, JohnMo said:

I would scrape out what you can and replace with a good airtight expanding foam. The foam will discolour with UV, but generally not an issue, especially as we move to winter.

Hi JohnnMo, For filling the gaps around doors.  is non-expanding foam better or expanding?. I am assuming non expanding foam

Edited yesterday at 16:21 by Mubbashshir

[JohnMo]

20 minutes ago, Mubbashshir said:

Hi JohnnMo, For filling the gaps around doors.  is non-expanding foam better or expanding?. I am assuming non expanding foam

Most airtight expanding foams only expand a little. Someone will come along soon and give what makes and types to use 

[Mubbashshir]

Thanks John

[SteamyTea]

Polyurethane foams will break down quite quickly when exposed to moisture, UV and thermal cycling (why they are not used in small aircraft manufacture anymore).

Cut out what you can, refill with a suitable foam, then as soon as you can, cover the gap with a combination of silicone and trim.

[Oz07]

No need to worry mastic man will do his thing. If it wasn't foamed he'd only squash in a sausage of that foam stuff they carry anyway.