Earlier in this thread I asked a question about how to prevent heat rising up through two dry lined partition walls in our dormer bungalow but haven't had any responses as yet. Any ideas welcomed! I know this is happening because there are two frost free strips on the roof which coincide with the positions of these internal walls. (We don't have any snow, yet!).

Posted By: Jeff BEarlier in this thread I asked a question about how to prevent heat rising up through two dry lined partition walls in our dormer bungalow but haven't had any responses as yet. Any ideas welcomed! I know this is happening because there are two frost free strips on the roof which coincide with the positions of these internal walls. (We don't have any snow, yet!).

You could cut a strip of plasterboard off, all the way along the top of the wall near the ceiling, stuff plenty of fibreglass or similar up into the top of the cavity (filling any void above the ceiling if possible) and then replace the plasterboard sections and redecorate. If you fill the rest of the cavity while you're in there it will improve the soundproofness too.

Or you could consider drilling a smaller hole and filling the cavities with polystyrene beads or warmcell, blown in. I don't think that's easy to "DIY" though.

Ok here is a picture for you lot, what is going on here?

I don't know 100% but I have a pretty good idea of what is going on.

Well, that is not what I was thinking, but I do think it has something to do with party walls. The large glazed middle window is a stair well.

Any more ideas?

Timber

Timber's one -- I recon that they are partition walls with fire stops at the top and under the tiles too.

This insulates the back of the tiles and stops all air movement behind the tiles stopping the snow melting.

interesting bit on the left presumably in an unoccupied flat with raised ceiling ties? Similarly centre front.

Its insulation in the partition walls or a firestop, dont think its becasue the partition walls are cold.

Bot and tony.

I do that that the firestopping insulation at the head of the wall is helping to insulate the tiles and keep the snow. The thought procress behind the solid wall ideas was that during the night the solid walls are cooling down, and during the day when the sun comes out and shines on the snow/tiles, the wall is then cooler than the air and tiles and so helps keep the snow there. Good old thermal mass?

Timber

Thermal bypass up the party wall in an eighties terrace in the background.

Or a boiler in the loft?