Adding weatherboard cladding to a house

TheSaint_2

Hi, my house currently has a part tiled front. There is no insulation in the cavity behind the tiles so I am thinking of removing the tiles to have insulation fitted to the house and then weatherboard over the top. There are several types of insulation and weatherboard and I wondered if anyone had experience of what is the best of both? For insulation I have seen a simple silver foil from ybs and also ybs do something called super quilt as well. Alternatively I could use a more rigid board insulation like cellotex?
For the weatherboard I'm not sure about getting pvc or cement based? I assume the aluminium will be very expensive and I don't want wood as it may discolour and won't last as long.

The house also has a cavity already, so no need to create one with the extra layer of insulation. 

Thoughts?

Cheers 

Jeepers_Creepers

What's your wall construction? Does it have a cavity? Is it filled or ventilated?

I'm not sure how external insulation works when you have a ventilated cavity, but hopefully someone will explain this for me.

Anyhoo, the most commonly used type of WB I've seen is the PVC type.

FreeBear

TheSaint_2 said: For insulation I have seen a simple silver foil from ybs and also ybs do something called super quilt as well. Alternatively I could use a more rigid board insulation like cellotex?

From what I have seen of these multi-layer foil insulation, they are pretty good at reflecting radiant heat, but are very poor at insulating against conducted heat - If you look at the recommended method of installation, the manufacturers (nearly) always specify using foils in conjunction with PUR type boards. One needs to ask why.... If it was such a wonderful material, why isn't everyone using it.

If you are going to insulate a wall, then by far the most effective method is to fix Celotex/Kingspan boards and then render or clad - Be aware that if you are doing more than 25% of the exterior walls, then Building Regulations apply. If you involve Building Control, they may well reject the use of multi-foil insulation and insist on "proper" insulation boards.

If you are going to clad, please don't use uPVC - It will look tired and tatty fairly quickly. Timber cladding will age nicely, and if you pick the right wood (Cedar), will last a long time. At the moment, timber prices are all over the place, so it might pay to wait for supply/demand issues to settle down.

stuart45

Cavity wall houses built in the 60's and 70's often have tile hung panels over the top of a solid wall. Can also be timber studwork.

TheSaint_2

Thanks for the replies. The house is 1980 construction. The tiled bit is over breeze block, but there is a cavity and then another layer of internal breeze block. I don't think it will be more than 25% of the house, but Thankyou for pointing that regulation out. I was not aware. 

Freebear, thanks for your comment on the foil. It sounds like I need the cellotex type thing as a minimum. 

I thought the pvc would look tatty too, though I've seen some very tatty wood weatherboard as well.. So I'm leaning toward the cement based stuff unless anyone has any things I should look out for with that?

Doozergirl

Composite cladding is another alternative for you.  Like wood, incredibly durable but if you don't like the way that wood changes colour (and looks tatty in the meantime), that's a decent option.  

Or indeed tiles!  

stuart45

I prefer the look of tile hanging myself, but it matter of personal opinion. On top of the blocks are probably 2x2 counter battens, then 2x1 tile battens. There's not a lot of room for insulation, most people get the cavity insulated.

Slinky

We are planning on replacing our hideous 1960s green concrete tiles with these in Ochre. Top part of the house will be tiled with render below. Have just changed the windows to slate grey.

https://www.tiernaturalstone.com/#contemporary

TheSaint_2

Thanks all for the great suggestions. I am hoping the company I pick can put the insulation over the top and add new deeper batons to account for the width. 

I tried to get a company to do the cavity insulation but they refused because the rest of the house has been done (although it is basically useless!)

Doozergirl

If you use Celotex or similar, it will be far better than blown in cavity insulation . 

Jeepers_Creepers

Slinky said:

We are planning on replacing our hideous 1960s green concrete tiles with these in Ochre. Top part of the house will be tiled with render below. Have just changed the windows to slate grey.

https://www.tiernaturalstone.com/#contemporary

Before and after photos when it happens, pleeeeez :-)