penguin Posted November 28, 2011 Share Posted November 28, 2011 Hi, Just in the process of getting my loft converted, the question I have is related to insulation... i'm using the existing 150mm "space blanket" on the loft floor, but what would you guys recommend using between the rafters before Sealing it all up with plasterboard + multi-finish? I'm tempted to go for the 170mm loft roll jobbie as it's cheap (but 5 for £33!) but some people in the camp are arguing about going for celotex / kingspan type insulation boards which are not cheap!!! so i guess the question is - wool or board? Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted November 28, 2011 Share Posted November 28, 2011 Rolls - better mate .. the kingspan sheets are mostly used for floating floors mate. +hardly no cutting with the rolls mate, Quote Link to comment Share on other sites More sharing options...
penguin Posted November 28, 2011 Author Share Posted November 28, 2011 cheers bud! Quote Link to comment Share on other sites More sharing options...
Rob Posted November 28, 2011 Share Posted November 28, 2011 On the other hand, the Celotex and Kingspan boards give better insulation, which is why they cost more. I use 'em to achieve a thinner buildup when designing from scratch. Quote Link to comment Share on other sites More sharing options...
JamieP Posted November 28, 2011 Share Posted November 28, 2011 I take you are doing it without planning permission or building regs? you cant use the rolls of insulation, regs in this area are 100mm celotex/kingspan between rafters and a layer of 40mm over the top or a layer thinsulex over the top on the recent loft conversions ive done. Quote Link to comment Share on other sites More sharing options...
Graham1984 Posted November 28, 2011 Share Posted November 28, 2011 I have always had to use celotex plus its not exactly hard to measure top and bottom,score a sheet and cut with a saw anyway if doing it yourself. Quote Link to comment Share on other sites More sharing options...
Rob Posted November 28, 2011 Share Posted November 28, 2011 I take you are doing it without planning permission or building regs? you cant use the rolls of insulation, regs in this area are 100mm celotex/kingspan between rafters and a layer of 40mm over the top or a layer thinsulex over the top on the recent loft conversions ive done. That would seem about right to meet part L (whatever bit) for an internal refurb. I can't help thinking its getting a bit intrusive of the Govt though to force someone down a particular path of expense if they just want to line out their own loft, for their own use. Hopefully you're right and the OP is not involving the Building Regs dept of the council. Quote Link to comment Share on other sites More sharing options...
JamieP Posted November 28, 2011 Share Posted November 28, 2011 That would seem about right to meet part L (whatever bit) for an internal refurb. I can't help thinking its getting a bit intrusive of the Govt though to force someone down a particular path of expense if they just want to line out their own loft, for their own use. Hopefully you're right and the OP is not involving the Building Regs dept of the council. Trouble with doing a diy conversion without planning permission or building regs will come when you try to sell the house, fire regs are a very important part of loft conversions, imo loft conversions are not to be messed with, building regs are there to help the next buyer to ensure everything is done to a good standard and to keep everyone safe. Quote Link to comment Share on other sites More sharing options...
snake Posted November 28, 2011 Share Posted November 28, 2011 The house behind mine had a dormer loft extension done, it did not need planning but had to be done to building regs. I checked with the local council when they started as it overlooks the rear of the houses, know one new it was happening but i was informed you don't require planning now to do it .[bristol city council]. Quote Link to comment Share on other sites More sharing options...
Rob Posted November 28, 2011 Share Posted November 28, 2011 Trouble with doing a diy conversion without planning permission or building regs will come when you try to sell the house, fire regs are a very important part of loft conversions, imo loft conversions are not to be messed with, building regs are there to help the next buyer to ensure everything is done to a good standard and to keep everyone safe. Fire regs, yeah, but for thermal performance it just smacks of too much interference if someone wants to improve the insulation in their roof only for their local council to say "no, you must improve it this much or not at all" Quote Link to comment Share on other sites More sharing options...
penguin Posted November 28, 2011 Author Share Posted November 28, 2011 Cheers for input folks, not for planning permissions or involving building regs but want to get as much done to that standard as possible... Not looking to sell as it'll be part of my little empire lol Quote Link to comment Share on other sites More sharing options...
probrox Posted November 29, 2011 Share Posted November 29, 2011 I've just built an extension with a sloping ceiling and had to use 165mm slab according to building regs. Unfortuunately celotex are the only ones who make 165mm so i couldn't go for a cheaper alternative like Ecotherm. Ended up costing about £80 a sheet. Quote Link to comment Share on other sites More sharing options...
penguin Posted November 29, 2011 Author Share Posted November 29, 2011 that's bonkers! celotex / kingspan seem to have a big role to play in this field, surely there are cheaper alternative manufacturers out there? no? Quote Link to comment Share on other sites More sharing options...
probrox Posted November 29, 2011 Share Posted November 29, 2011 Ecotherm is cheaper, I'm sure there are others as well. Ebay seems to be quite a bit cheaper if you can find a batch large enough for your needs. Quote Link to comment Share on other sites More sharing options...
probrox Posted November 29, 2011 Share Posted November 29, 2011 Where abouts are you based? I work for a building company so I might be able to get you a discount from one of our suppliers if it is of any use. Quote Link to comment Share on other sites More sharing options...
penguin Posted November 29, 2011 Author Share Posted November 29, 2011 high wycombe :-) much appreciated! Quote Link to comment Share on other sites More sharing options...
Rob Posted November 29, 2011 Share Posted November 29, 2011 Thing is, and this is OT, although I fully subscribe to Building Regs with regard to safety, structure, drainage etc, for public health and safety reasons, I don't agree with enforced thermal performance. I know its supposed to be for "the good of the land" to prevent mass housebuilders building cheap-ass houses that cost a fortune to heat, but what if a homeowner wants an all glass extension or house and is happy to pay for their fuel costs? Its all tax in the pot. The latest Part L's are very restrictive and actually prescribe percentages of wall to glass, and IMO that's wrong and counter productive to good design. There are a few people who have built uber-eco houses that use no energy input at all, so why not trade off that energy to someone who wants an energy inefficient house? Our Govt is quite happy to trade carbon points for huge sums of money, so they have no argument against what I propose. Quote Link to comment Share on other sites More sharing options...
probrox Posted November 29, 2011 Share Posted November 29, 2011 I just spoke to Travis Perkins in High Wycombe. They have quoted me £30 + vat per sheet for 100mm celotex. Its not somewhere we normally work, I probably could have got a better deal local to me, but still not a bad price. They have put a quote on the system under my name, not the companys, so if you want any more info let me know. Quote Link to comment Share on other sites More sharing options...
penguin Posted November 29, 2011 Author Share Posted November 29, 2011 nice one bud!! do you know how big she sheets are? i'll do proper measurements tonight and figure out how many i'll need :-) Quote Link to comment Share on other sites More sharing options...
probrox Posted November 29, 2011 Share Posted November 29, 2011 They're 8' x 4' (2400mm x 1200mm) Quote Link to comment Share on other sites More sharing options...
penguin Posted December 1, 2011 Author Share Posted December 1, 2011 Hi Probox, i'll need 6 but will buy 7 just in case :-D .... are these delivered or can i collect? Quote Link to comment Share on other sites More sharing options...
probrox Posted December 2, 2011 Share Posted December 2, 2011 You can collect them from Travis Perkins, Wycombe Lane, High Wycombe , HP10 0HH When you get there tell them you want to order from Quote number Q247690 (under my name - Phil Browne). I assume they will have these in stock, if not they should get them in pretty quickly. When I got the quote I guessed at 10 sheets, but just tell them you re-measured if they ask. Quote Link to comment Share on other sites More sharing options...
penguin Posted December 5, 2011 Author Share Posted December 5, 2011 Cheers Phil! Quote Link to comment Share on other sites More sharing options...
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