Mushroom sleeving

[jddevel]

Advice please. What have members used to sleeve from where the mushroom vents terminate to where the internal grill fits. Due to battening and insulation there is quite a gap.

[linnit]

I used these

[Sea Dog]

2 hours ago, jddevel said:

Advice please. What have members used to sleeve from where the mushroom vents terminate to where the internal grill fits. Due to battening and insulation there is quite a gap.

Iirc they fettled this on Blue Peter once using old Fairy Liquid bottles (unless that was the time they built a nuclear submarine)

[bizzard]

Roll em up from cornflake boxes, stick or staple them together and varnish or paint to make damp proof. Or as above cut from any plastic bottle or tube the right size.

[Neil2]

You can buy ready made liners but they are a horrific price, IMHO.

I have a vent to the engine room which is a section of plastic SVP which just slots into the mushroom vent 'ole it's exactly the right diameter on my boat.  If yours is the same size you could cut up a SVP into sections, a very cheap way of making liners.

[Sea Dog]

Does it really matter whether it's sleeved or not? If it doesn't look unsightly, maybe it could stay as it is?

[nb Innisfree]

We used plastic flower pots, greased them up then inserted the from the inside, from roof squirt builders polyfoam into the gap between pot and vent upright. Next day removed pot and trimmed excess foam then painted. Or if you prefer pot can be left in situ. Either way any condensation will be eliminated. 

[jddevel]

Some ideas to consider Thank you

[embis]

On 10/04/2017 at 08:25, jddevel said:

Advice please. What have members used to sleeve from where the mushroom vents terminate to where the internal grill fits. Due to battening and insulation there is quite a gap.

Does this gap really need to be filled? is there any advantage to putting sleeves in? 

[Boat&Bikes]

6 minutes ago, embis said:

Does this gap really need to be filled? is there any advantage to putting sleeves in? 

Stops the mice getting between the linings.

Ian.

[matty40s]

Grey plastic drainpipe is quite a popular lining. Just make a slice down it to get it through the hole and it should fit splendid.

[system 4-50]

19 hours ago, embis said:

Does this gap really need to be filled? is there any advantage to putting sleeves in? 

YES! Without them (or something equivalent) I get significant condensation. On the metal edge of the vent hole.

[IDS]

As mentioned above use plastic tube slit along the axis. If you have tube of slightly larger diameter than the hole in the ceiling, then it neatly expands to fit snugly, after compressing it and sliding it in.

Edited April 20, 2017 by IDS

[jddevel]

I`ve plenty of soil/ drain pipe available. Seems like a good plan. Thank you

[Sea Dog]

4 hours ago, system 4-50 said:

YES! Without them (or something equivalent) I get significant condensation. On the metal edge of the vent hole.

There's nowt in mine and I don't have any such issues. My boat has a spray foam insulated steel roof. 

[system 4-50]

2 minutes ago, Sea Dog said:

There's nowt in mine and I don't have any such issues. My boat has a spray foam insulated steel roof. 

Me too, but the tiny metal roof edge exposed by me cutting (not very expertly) the vent hole and disturbing the foam a bit created (in recent humid conditions) an inconvenient number of drips onto my as yet unvarnished oak veneered tabletop!

[David Schweizer]

I used 4" extraxctor fan tubing which can be bought in short legths from ant DIY barn.

[chevron]

Screwfix MANROSE ROUND PIPE WHITE 100MM (15872) under two pounds inc vat just done mine with it

[matty40s]

2 hours ago, jddevel said:

I`ve plenty of soil/ drain pipe available. Seems like a good plan. Thank you

Make sure you wash it first. ...