render me senseless.. its cold

[atm]

Hi all.

I live in a bungerlow which in a few weeks the brother in law is flat rendering for me. (awfull fat pebble dash has gotta go) This got me thinking..

I have Solid walls and bedroom 1 is a knightmare in the winter for cold, condensation on walls and black spot mould.. yeah nice place to be.. There are 2 external walls and the other wall has a huge bay window in it.

Anyway was thinking if in law is about to render why don't i put up some external insulation before had. I am pretty handy so no probs there just would really appreciate a push in the right direction please.

Look forward to your expert ideas. many thanks

 

[JohnD]

yes it can be done but is not common in the UK. I watched it done at a new build n Switzerland a few years ago. They bolt foam insulating board to the wall and window reveals with an expanded mesh over it, then rendered onto the mesh.

as you say you have a bungalow, you may have a problem with people bumping into it and cracking it. The site I saw, they put a stone cladding leaf over the insulation for the ground floor to protect against impact damage.

it sounds like you also have condensation problems so read //www.diynot.com/wiki/building:condensation_in_houses

 

[stuart45]

External insulation is usually done by specialist firms. You also have consider things like extending the cills, and position of the rainwater goods. It is expensive, but does have some advantages over internal insulation. It also depends on how you heat your home. If you are out all day and want to come home and have the house heat up quickly internal insulation is better. If the house is heated for longer periods, external is better as the walls become storage heaters. If you google Energy Saving Trust Primer, I'm sure there is something on there about external insulation.

 

[atm]

Thanks guys..

Staurt45 so i tick the out all day box so internal it is..

The room in question suffers from black spot mould behind wardrobes, chest of draws etc it also occurs up hi where one wall meets another..

I realise this is an air flow/moisture issue so all windows open all day, no drying wasghing indoors, use extractor fans etc bla bla bla.. Basically wall inside is cold cold cold.. and rads never ever warm the room.Would studding and celotexing then plasterboarding solve my problems. would do the 2 alcoves either side of chimney breast, and the full length of the other exterior wall... the other wall has big dglazed bay window..

Hate black spot mould (is bad for u) and mrs hates the cold which is never good for getting in the mood. heard that lining with polstyrene paper may help mould.. aarrrgggg help..What you rekon?

many thanks

 

[JohnD]

the polystyrene veneer is so thin as to be practically useless. It might feel warm when you put your hand to it, but remember it is only about 3mm thick, whereas cavity wall insulation is about 60mm thick.

 

[atm]

stuart45!

 

[alittlerespect]

You would do best to put the insulation on the warm side of the building, after all you are trying to keep the heat in!! Not to mention that putting insulation on the outside is not as effective as putting on the inside so you would not be giving yourself the best deal.

You will also need to add more insulation in the loft, then the room should become affordable to heat which is why you have the problem that you have at the moment - lack of heat. Better not forget double glazing or even secondary glazing to the window if not already done as this is a must if you really want to feel an improvement.

In your case I would recommend using an 80mm thickness PIR insulated plasterboard stuck to the existing plaster finish.

Regards

 

[legs-akimbo]

If you have a cavity then do the easiest and best thing and inject this with poly bead platinum.
External insulation is far superior to internal, which is exactly the reason it is used in coldern Northern european countries, it wont get damaged its not plasterboard, but it is expensive.

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