B and Q Insulated Timber Loft Board - any good?

[DIYNotIan]

HI all

I have most of my loft insulated to 300mm but would like small area near the natch - and a "path" to the water tank - boarded. I want ot keep things as well insulated as possible and so am looking at this product:

http://www.diy.com/diy/jsp/bq/nav.j...mpid=4&tmad=c&ecamp=cse_go&CAWELAID=411682691

I wondered if anyone would be kind enough to share their opinion on it?

Strangely, it does not seem as though places like Wickes and Screwfix do an equivalent product, which struck me as a bit odd.

And are there any more efficient or cheaper ways of going about it?

Cheers

Max

 

[JohnD]

my opinion is that the price is absurd

other vendors sell slabs of insulating foam, and sheets of chipboard. They have not been cut into tiny panels and glued together and had the price multiplied by 10.

 

[DIYNotIan]

Hi there

With regard the chipboard, do you mean the tongue and groove loft panels?

As for the slabs of insulating foam, I have no idea what kind of thing I would need that would be similar to this B and Q stuff. So any lkinks would be extremely helpful.

Many many thanks

Max

 

[JohnD]

http://www.wickes.co.uk/Insulation/Polystyrene-Insulation/icat/cipolyinsul

http://www.wickes.co.uk/Tongued-and-Grooved-Chipboard-Flooring/invt/164516

http://www.screwfix.com/search.do;j...t_by=price_1&fh_sort_order=1&fh_start_index=0

 

[mointainwalker]

@JohnD

John

The price isn't really ridiculous when looking at the links you give for sheet insulation.

These chip/poly boards are GBP 14/m2 for 100 mm insulation and 22 mm chipboard and it would cost GBP 10/m2 to buy 100 poly insulation alone.

Given this cost, plus the added cost of the chipboard vs the ease of transport/installation of the composite boards and no need to have to cut (nice straight lines ) to get the stuff in the loft, I think this is a very valid DIY product.

Only reservation I would have (and have not read all info ) is that I don't see how it will be installed. Put it onto the joists and any significant weight/pressure will compress/crumple that PS directly over the joists and then it will start to break up.

 

[JohnD]

those toy panels you are looking at are 0.384m² each and £7.98

That makes them £20.78 per m²

The Wickes http://www.wickes.co.uk/Polystyrene-Insulation-Board/invt/210825 is £7.09 per m²
and the http://www.wickes.co.uk/Tongued-and-Grooved-Chipboard-Flooring/invt/164516 is £4.03 per m² (cheaper if you buy Buy 10 for £5.80 each)



I make that about half the cost

plus with fewer joints they will be stronger and more rigid

 

[mointainwalker]

those toy panels you are looking at are 0.384m² each and £7.98

That makes them £20.78 per m²

Ooops, let down by my mental arithmetic Embarrassing ! No excuses though.

The Wickes http://www.wickes.co.uk/Polystyrene-Insulation-Board/invt/210825 is £7.09 per m²

But that's only for 75 mm amd not 100 mm, so that makes GBP 9.45/m2 pro rata. added to your m2 chipboard price that comes out at GBP 13.48/m2.

As for being stronger, i think it comes out equal as these are T+G on all edges sides which the 2400 x 1200 sawn panels would not be.

Although i would regard myself as being fairly tight on the materials front, i still don't think the price is dreadful, just the major reservation about if they actually fulfill the function they are advertised for.

Having written that it seems rather stupid because anything that doesn't work is a total waste of cash.