Insulation Deals & Offers

Sorry, yes you're right. Wouldn't make much difference, it's just that the joists tend to be 100mm anyway.

I thought it was 100mm between joists then 170 on top?

The two stars relate to the thermal efficiency of the product. This is loft roll 44, there is also a better, more expensive loft roll 40 product. The thermal value (R value) is 0.044 w/mk. To hit current minimum regulations for a new loft, you need a total of 270mm of this. 170mm between the joists, and then 100mm across the top.

What are the two out of five stars on its packaging? Any details on R or U values? Thanks

Great comprehensive post. Thank you

Yes. This works absolutely fine if you are just wanting some loft storage. I bought 2 packs of the stilts in your links and loft boards for less than half the price of the links at the top of this thread. Very easy to install as well if you have a cordless screwdriver.

I have the same system in my attic. It works well and allowed for much deeper layer of insulation. The missus has stored a ton of stuff up there on it, and so far we've had no problems in 7 years.

New builds are different as like you say its built to tight specs to only support a roof. The old houses that have acrington brick would probably support an extra house ontop.

Fitted the 'LoftZone StoreFloor Kit for New Build Houses (7m2)' that I purchased from Homebase in my loft last year. It has made a large storage area that is easy to walk on. The head room is obviously reduced but not so much that I cannot easily walk on the boards, it is actually easier to walk across than before due to the cross beams being easier to climb over. Also my insulation is not squashed down. It does seem expensive when you look at what you get but I am glad I fitted it.

I really like the look of this but it's quite a bit more expensive than using loft stilts from B&Q or Wickes. Also while looking at it just now. In the example pictures above the weight of 16 loft boards is carried by 20 Loftzone stilts costing 93.49. Using the recommendation of 6 stilts per board for B&Q or WIckes gives the weight carried by 45 stilts yet costing only 60.00. Also you'd have 3 spare stilts and in the case of Wickes slightly higher (30cm) stilts for more insulation or condensation gap. I have a new built finished in the last year and my insulation would most certainly take up the majority of the 27 - 27.9 of B&Q or LoftZone stilts.

Aldi do deliver...when stocked..and priced online(this isn't) Appears £7 B&Q...£13! at Toolstation(who I think, deliver most stuff free) -surely can't be same stuff though?..at this price..WAS a quick Google, don't shoot me..😋

Think it’s used behind radiators to reflect heating into rooms rather than into external walls?

Looking for this, but no where near an Aldi! Any ideas where I get it delivered, cheap?

This is nearly double the cost of the Knauf equivalent, which covers less area too...The Knauf has the same energy rating as this too, so cant see why this is getting heat

It's not. The clue is in the title, it's a rock based wool product. One advantage it has over other insulation products is that it is non-combustible.

Bandq still selling eko roll with same r rating - 5.5m2 coverage at £16.50 each when buying 3.

Worked with this for years.. its fibreglass...

The new asbestos maybe.

I've updated my spreadsheet comparing the entry loft insulation at the 3 diy sheds. Notes 1. Despite all being made by Knauf they all are seemingly different types, earthwool, ekoroll and space loft roll. I've no idea of the differences and suspect this is something to keep the diy sheds happy and its really the same product. Please correct me if I'm wrong. 2. There are some variances in the length of the rolls, especially the 200mm from Homebase which is quite short so its best to show the cost as per metre squared, which Wickes does by default. 3. All 3 have offers at the moment and in Homebase and B&Q you have to buy multiples whereas Wickes is per roll. Summary - Price per m2 100mm Homebase £1.54 Knauf Earthwool Loft Roll - 100mm B&Q £1.99 Knauf Eko Roll Loft insulation roll, (L)7.28m (W)1.14m (T)100mm Wickes £2.17 Knauf 100mm Space Bottom Layer Loft Roll Insulation - 8.3m2 170mm Wickes £2.16 Knauf 170mm Standard Top Up Loft Roll Insulation - 6.47m2 B&Q £2.55 Knauf Eko Roll Loft insulation roll, (L)5.68m (W)1.14m (T)170mm 200mm Wickes £2.67 Knauf 200mm Super Top Up Loft Roll Insulation - 5.61m2 B&Q £3.00 Knauf Eko Roll Loft insulation roll, (L)4.83m (W)1.14m (T)200mm Homebase £3.29 Knauf Earthwool Loft Roll - 200mm Detailed Calcs -> Google Docs

14 quid - knauf said

I can't find any information that suggests that it's any different to the base layer, literally just the depth. I think the base layer is made to go between the joists which are normally about 4", and then you have the 170mm or 200mm to go at a right angle to that laid above the base layer. I laid 3 layers of 100mm while it was on offer as I didn't think they'd do offers on the other depths. 100mm - 8.3m² £12 - £1.44 per m² at 10cm depth (previously on offer) 170mm - 6.47m² £14 - £1.27 per m² at 10cm depth 200mm - 5.61m² £15 - £1.33 per m² at 10cm depth

+1

Can double the amount of 170mm Top Layer Loft Roll Insulation be used instead of a base layer, or is the composition different?

Blimey. That's small. Perhaps buy one roll and try it - I reckon it'll be pretty tough though.....

Just measured the opening - 30cm X 45cm. I can fit through it, but it's a squeeze and it's very near the lowest point of the roofline, so not much height above the hatch either. :-(

Wear a mask, the fibres are deadly in your lungs. One of our workmen during house renovations had to be hospitalized as he was coughing up blood, root cause found by the builders to not have used masks and eye protection while on another site laying insulation.Yes you will be hot & sweaty and look like a plonker while working with it and get a hard time from your kids but at least you will be around long enough to see them grow up

Most rolls will compress sufficiently to enable them to be dragged through a hatch (big enough for a human to get through!) Definitely don't unroll it and pull through (whilst possible it'll be a horrific job as it'll expand massively as you unpack it and you'll have a flexible sheet effectively 1.2x6.0m!)

Might sound like a strange question, but does anyone know (roughly) what the diameter of the roll is? We've got a really small loft hatch and I reckon it'll be a close call if I can squeeze a roll through it. I guess, worst case, I could unroll it beforehand and drag it through, but that sounds like it'll just make even more mess!

Good price - bought 21 rolls do to my loft which only had 100mm. Sadly long gone at the £3.00 per roll deals from yesteryear which were subsidised by by the energy companies.

From an earlier Homebase post, but the point applies equally here: Great time of year to get this down as well. Government recommends at least 270mm of insulation like these rolls in your loft floor to avoid excessive heat lost from your home and to save big on your energy bills. Don't crush the insulation in any way or you severely reduce its effectiveness and make it a waste of money. We couldn't get more than 100mm down without raising the loft floorboards, but we had none before, so putting 100mm of this in still made a difference to our energy bills. However, you can buy solid slabs of 100mm Rockwool RWA45 or RW3 insulation online that are not much more expensive, yet are as easy to work with as a roll and would give much better insulation performance than a roll like this. In hindsight I wish I had put some RWA45 or RW3 slabs in now in-between my ceiling joists. You can buy decent Rockwool slabs from Wickes, but the very best stuff (RW3, RWA45) is only sold online. What makes RW3 better? Thermal conductivity. Thermal conductivity is just a measure of how much heat the insulation allows to pass through it. The lower it is, the less heat passes through. You want to retain as much heat as possible in your home. Wickes sell Rockwool sound insulation slabs with a thermal conductivity of 0.038 W/mK: wickes.co.uk/Rockwool-Sound-Insulation-Slab---100mm-x-400mm-x-1-2m/p/148842 Rockwool RW3 (sometimes called Prorox SL 930) is 0.034W/mK: insulation4less.co.uk/rw3-100mm In comparison, this Knauf Eko Roll has an R value of 4.5 = thermal conductivity of 0.044 W/mK (meaning it loses about 30% more heat than Rockwool RW3 does): knaufinsulation.co.uk/products/glass-mineral-wool/earthwool-loft-roll-44 These figures mean you need about 250mm thick Knauf Eko Roll to get the same benefits as 220mm thick Rockwool slabs from Wickes or 200mm thick Rockwool RW3 slabs. If you have little loft insulation at the moment, the Knauf rolls will make a massive improvement and you will pay back the insulation cost very quickly in lower energy usage. However, if you can't fit 270mm thick insulation in your loft, buy the better Rockwool slabs. These Rockwool slabs are also fantastic for sound insulation.

I did a comparison of the cost per m2 of the 3 main DIY sheds over on this homebase thread .... https://www.hotukdeals.com/comments/permalink/39463854 Hope it helps.

I bought from wicks as b&q hasn't had home delivery on this for months although now added again, these are big n bulky, I needed 12 rolls would have taken me about 6 trips in my car. The different thickness roles are different lengths so make sure you measure properly

Just what I was looking for...thanks

I have previoulsy used the wickes ones and and i would not say it is cut enough to fall apart when rolling, it actually has marking for 3 different sizes on the pack which i think you use to cut while still rolled up in pack. I might tackle the roof area of bungalow today and use the b&q and see how that goes, before moving on to the dormer area which will be more of a pain. Will report back on my experience. Thanks

Unfortunately my knee isn't going to let me do it on this visit, plus I have to improve the job the handyman did on installing their spotlights first and even before that fix a hole in the roofing felt which is letting water in if the wind is blowing in the wrong direction. I was also going to choose the b&q one myself and saw those reviews. All of this type of insulation has pre cut perforations to make it easier to cut it so it fits between the joists. Whether the b&q one is worst in this respect to the others or if it's just a case of people bothering to feedback on the b&q site I just don't know. I'd probably still opt for the b&q one and just be a bit extra careful with it, taking into account the feedback.

Thanks for this. I was planning to carry out some work on my bungalow over the next few days and was deciding which of insulations types would be the best value for money - out of the three you mentioned. Which one did you end up going for? I was thinking on B&Q however a lot of the reviews report back that their roles are pre cut so they fall completly apart when laying.

Hi, Thanks Neotrix for posting this as I'm about to insulate my mum's extension over xmas if my knee holds out. However as Homebase has been closing stores over the past year then a round trip to the nearest one doesn't really make sense. So I've created a comparison with B&Q and Wickes to see what the differences are. Notes 1. Despite all being made by Knauf they all are seemingly different types, earthwool, ekoroll and space loft roll. I've no idea of the differences and suspect this is something to keep the diy sheds happy and its really the same product. Please correct me if I'm wrong. 2. There are some variances in the length of the rolls, especially the 200mm from Homebase which is quite short so its best to show the cost as per metre squared, which Wickes does by default. 3. All 3 have offers at the moment and I'm not sure when the B&Q and Wickes ones expire. Also Homebase and B&Q you have to buy multiples whereas Wickes is per roll. Summary - Price per m2 100mm Homebase £1.54 Knauf Earthwool Loft Roll - 100mm B&Q £1.99 Knauf Eko Roll Loft insulation roll, (L)7.28m (W)1.14m (T)100mm Wickes £2.17 Knauf 100mm Space Bottom Layer Loft Roll Insulation - 8.3m2 170mm B&Q £2.55 Knauf Eko Roll Loft insulation roll, (L)5.68m (W)1.14m (T)170mm Wickes £2.93 Knauf 170mm Standard Top Up Loft Roll Insulation - 6.47m2 200mm B&Q £3.00 Knauf Eko Roll Loft insulation roll, (L)4.83m (W)1.14m (T)200mm Homebase £3.29 Knauf Earthwool Loft Roll - 200mm Wickes £3.56 Knauf 200mm Super Top Up Loft Roll Insulation - 5.61m2 Detailed Calcs -> Google Docs

I got so much of this stuff from my energy supplier for free that I was selling it, did the whole loft and still had about 5 rolls left

That is good!

Good price but if you need 3+ rolls, then this is a better deal: https://www.hotukdeals.com/deals/knauf-earthwool-loft-roll-200mm-or-100mm-17-each-but-on-4-for-3-51-total-free-reserve-collect-at-homebase-3329783

Great time of year to get this down as well. Government recommends at least 270mm of insulation like these rolls in your loft floor to avoid excessive heat lost from your home and to save big on your energy bills. Don't crush the insulation in any way or you severely reduce its effectiveness and make it a waste of money. We couldn't get more than 100mm down without raising the loft floorboards, but we had none before, so putting 100mm of this in still made a difference to our energy bills. However, you can buy solid slabs of 100mm Rockwool RWA45 or RW3 insulation online that are not much more expensive, yet are as easy to work with as a roll and would give much better insulation performance than a roll like this. In hindsight I wish I had put some RWA45 or RW3 slabs in now in-between my ceiling joists. You can buy decent Rockwool slabs from Wickes, but the very best stuff (RW3, RWA45) is only sold online. What makes RW3 better? Thermal conductivity. Thermal conductivity is just a measure of how much heat the insulation allows to pass through it. The lower it is, the less heat passes through. You want to retain as much heat as possible in your home. Wickes sell Rockwool sound insulation slabs with a thermal conductivity of 0.038 W/mK: wickes.co.uk/Rockwool-Sound-Insulation-Slab---100mm-x-400mm-x-1-2m/p/148842 Rockwool RW3 (sometimes called Prorox SL 930) is 0.034W/mK: insulation4less.co.uk/rw3-100mm In comparison, this Knauf Earthwool 44 is 0.044 W/mK (meaning it loses about 30% more heat than Rockwool RW3 does): knaufinsulation.co.uk/products/glass-mineral-wool/earthwool-loft-roll-44 These figures mean you need about 250mm thick Knauf Earthwool to get the same benefits as 220mm thick Rockwool slabs from Wickes or 200mm thick Rockwool RW3 slabs. If you have little loft insulation at the moment, the Knauf rolls will make a massive improvement and you will pay back the insulation cost very quickly in lower energy usage. However, if you can't fit 270mm thick insulation in your loft, buy the better Rockwool slabs.

Warm deal

I thought it was a pair of batteries (lol)

You got me excited there! I think it's been like this for a while 😄

This is a truly great price at Wikes for 100mm bottom roll and top layer 200 homebase this deal great price also so ordered both.

Or this - 8.3m2 of 100mm for £12 from Wickes (compared with 3.88m2 of 200mm for £17 - without the 4 for 3 deal) https://www.hotukdeals.com/deals/knauf-100mm-space-bottom-layer-loft-roll-insulation-83m2-12-a-roll-at-wickes-free-click-collect-3321096

Cheers op! Just need to find some insulation boards for the rafters now! 🔥

Bad idea, will likely need to damp

You don't want this in a shed. You want Kingspan for that.

Great price OP collected a few at £12 thanks

Sounds interesting! Great work.

I believe it's all the same stuff and wouldn't be any different. The 100mm is normally for between the joists at 2x4" and then at right angles on top of that with 170mm or 200mm. At this price it works out: 100mm at 200mm thick = £2.89m² 200mm at 200mm thick = £3.56m² So works out cheaper to get 3 layers of 100mm rather than 100mm then 200mm on top of you're completely replacing the insulation. I believe anything above 300mm thick the heat loss is almost negligible so not worth it. P.s. if you want to do loft storage with 300mm insulation (100mm and then 200mm over the joists) if you use the loft legs they're normally only 170mm high, really you want them higher as it will compress the insulation underneath, and ideally you want an air gap between the insulation and underside of the loft boards. I used 230mm offcuts of CLS studwork as it's cheap and screwed them in at angles to the joists below. You'd want at least on the corners of each board and some more half way. You can screw the loft board into the cls and only using minimal screws and glueing the t&g boards together the whole thing was extremely rigid and shared the weight of everything across many joists. If anybody's interested in doing it and wants any more info let me know.

As in won't cause damp / condensation to build up etc, given that it is called a bottom layer?

of course 'its allowed' lol

Me too, not the advertised brand but still acceptable :)

Received the ones from EuroCarParts yesterday. Granted they are 15mm wide.......but 10 rolls for £1.19 delivered by DHL.

With all the red tape these days, what we need is more red tape. lol

Handy if you aren't going near screwfix but they do have the red in 33 metres for 89p https://www.screwfix.com/p/510-insulating-tape-red-33m-x-19mm/4912v

skipp112, I would get the best you can afford, as the old addage goes, Buy cheap buy twice is correct. You are only going to do it once. Regards (pirate)

https://www.aldi.co.uk/multi-layer-foil-insulation-quilt/p/010791259759300 Anyone advise how this compares?

Mark I would not use the plasterboard screws as they are Bugle heads (if you have the black phosphate ones)and they are likely to pull through the insulation sheet and it is dear stuff... (pirate)

Can you use plasterboard screws as I have box of them already and they are about 30mm long. Thanks

Around 20mm will be best, better use a electric stapler as it is quite thick.

We what we got yesterday, with a bit of time we could make enough bunting made of electrical tape, for the next king's coronation (party)

Over the last couple of months, Screwfix has become our BFF!! Not as bad as Amazon or eGlobal addiction... but close! Unsure how on earth they can make a profit on 3/4s of the stuff they flog, so I guess the other quarter of stock is profitable!! Ordering stuff that's cheaper than anywhere else and not actually needed, seems to be the norm on here now P00 (y)

You could decorate every room in the house .....go on you know you want too.... ;)

I went in to Screwfix the other day, I can't believe their prices. I needed a double patress box, from Amazon it was £3.20 add-on, Screwfix 78p! And this tape in single rolls was about 80p whereas in Poundland you can get a few rolls for a quid but they're only about 5m each!

2p a meter.. erh BARGAIN! (y)

I didn’t know I had to google this tape as well as other stuff but I wouldn’t buy it again lol

Yes I've had these, pretty thin tape, it's ok but light duty stuff really.

Fun for all the family..... (y)

I’ve bought this before, I never knew you could get tape this thin, but it’s cheap

Happy that it helped @cmdr_elito (highfive)

Most equipment wiring is black or white, so if you want to add extra insulation to that, grey would look strange Grey is sometimes network flex, other than that the only other colour I've seen is cream domestically.

grey is a phase colour. as an electrucian i usually have brown, black, grey, blue and eatth insulation tape, and a roll of white for wiring. at home i only tend to have grey :)

i actually need gaffa tape. can anyone whos used this tell us the quality?

Picture looks more like gaffa tape than insulating tape.......?!

IMO, not a very useful width: difficult to insulate things effectively with such wide tape, you really need narrower tape to stretch over objects 19mm is the normal size and I don't quite understand why grey? Black is the norm I think.

Should I roll it across the joists 90 degrees to the existing insulation , or just roll over the existing between the joists?

I was in the same situation as you I only had 100mm and was old. I bought 200m to go over the top of the old insulation. I couldn't find anything as cheap as this it's a good deal. Always better to have 300m insulation.

Went up in our loft and we've got only 100mm up there put in donkeys years ago. Is this the cheapest about? Not on any benefits. With edf. Can I roll this over the joists, even with the electric cables? We don't have downlighters but do have an electric shower.

Thanks for posting just bought some (y)

Those were the days. Bought quite a few as well, thinking ahead, keeping them 4 years until we were able to buy a house.

Priced to clear and clear it did as nowhere has any stock.

Release the geese!

Good savings. But no where has any stock.

Not sure what thickness, but cheaper at selco 100mm 8.3m2 for £21

Brill price . Just ordered 15 rolls