Loft conversion - any recommendations?



Amen brother. We bought our house with the conversion done, and it has been done to a very high specification with great use of space and light. But in summer it can overheat quickly and become a furnace. Opening windows/bifolds on either side can help but on those days with no wind. Better use of insulation could’ve helped this.


Proper compliance with Building Regulations will ensure adequate levels of insulation so any decent contractor will be bound by these regs.

If you haven’t found a builder yet, JA Lofts is run by a good guy. You can see a local job that he’s doing on his facebook and instagram pages.


My neighbor had insulation done to building regs and their loft still gets very hot in summer. I’m getting mine done at the moment and have gone for sash windows, which will face the prevailing winds, as well as a temperature controlled skylight which I am hoping will lead to a chimney effect through the house. Fingers crossed.


When was theirs done?
My brother-in-law’s loft room was specified at 50mm (useless!) Celotex/Kingspan c.2000, then I think mine was 140mm (which is comfortable) in 2009 but I think it’s been increased to around 170mm now.
Presumably your sash windows are made to todays thermal standards so you should be fine.
That skylight/chimney thing sounds interesting.


Last year. In think regs are 120mm on a flat roof now (warm deck construction).


For a pitched roof I have a feeling it’s much heftier, at around 170mm. So if a roof only has 150mm rafters, and allowing for a 50mm ventilation gap, there would need to be 130mm hard slab insulation between the timbers plus maybe a 48mm thermaline plasterboard.
(I will confer with Jordan of JA Lofts when I see him in my local bakery at 6:30am tomorrow).


Not all insulation is made equal and the recommended x mm of it is meaningless unless you know what it is. You can have 100mm of cheap stuff that provides the same insulation as 50mm of expensive stuff if that makes sense. (That’s probably an exaggeration but you get what I mean).


Which is why I mentioned the brands Celotex and Kingspan


It’s all in the U values.


And to acheive the requisite U values Kingspan and Celotex will have their own table showing what thickness of a particular insulation board does the trick


Ahh, yes, sorry!


Hello, don’t think I can PM either. I would also like to PM like to ask if I could have the quote comparison and also like to PM Emily about Builders to avoid. Moving back to FH and will need to do a loft extension soonish. Many thanks!


I’ve enabled PMing for you, Linda


Thank you so much


Hi, Dan sorry for the slow reply. Really appreciate the advice and for you taking the time to provide plenty of detail. We’ve signed up with a building company now and just going through planning. All being well our case should be decided next week and we can get on with the build. Seems that staying very close to the builders throughout is key. We did challenge certain aspects of the plan where a number of seemingly unnecessary voids were included, i.e behind the toilet and in the eaves seemed excessive. Thanks again!


LMB Contract / REF number: 2016-10-0338

I’m a bit tired of some the ‘over positive’ reviews on LMB Group and a significant amount of people contacting because of their problems with them even to this day. Several thousand people have read my reviews but the facts are that currently LMB Group, or formally LMB Loft Conversions or LMB Lofts limited or Addiscombe Building Contractors Limited all had the same MD and the same corresponding office address but of course none of the above named are related! Laughably, I have intercepted over exaggerated messages to certain Company Review Companies to take down my reviews which kinds of defeats the purpose of free speech , and having briefly searched through his solicitor’s system, letters were sent out to the many creditors to confirm the current name organization disassociation with previous names. However, more importantly, potential customers may or may not be covered under their so called ‘10 year insurance guarantee’ if they change and they liquidate their company again.

But here are some facts of what happened on our work:

  • Rear ground extension - Project management non existent. Builders hadn’t a clue how big the door opening should be , and could not even build symmetrical parallel walls - out by 3-4 cm at widest point (slight problem for floor tiler!)

  • Rear extension roof taking around 2 weeks to do yet left unfinished. and not properly done

  • Lintel for rear extension left dangerous and undone. (At least they could’ve put the bricks back!).

  • MD Lee Murphy Constantly demanding money even when next stage of contract had not been completed (in this case , stairs needed to be completed for next payment). According to two surveyors before stairs were in, the whole loft extension should of had a water tight roof and insulated walls before stair installation. This a standard regulation in the industry which should of been implemented here before installation and demanding of money.

  • Theft of items on site by contractors with police called. Mr Murphy even went to his carpenter accusing me of stealing his items! I even have the carpenters Whatsapp messages calling me ‘evil’ to prove this!!!

  • Lee Murphy has no problem employing people with criminal records (he knows this) and I can easily prove this if and when this goes fully to court.

  • Inadequate equipment supplied to LMB staff with carpenter falling off unstable ladder. Even had to help the roofer to the car and help him with certain aspects of work, all of which I should not have done!

  • Lee Murphy has no problem employing people with criminal records * this can and will be proven if taken to court.

  • Roofing beams for rear extension slope roof not even touching walls. So had to force Lee to get it done properly. Why was I in this position in the first place?

  • An enormous amount of rubbish on scaffolding. yet refused to get a skip claiming he hasn’t got enough money for skip or materials ( receipt docs and can be easily proven with Whatsapp messages). Rubble subsequently fell from there narrowly missing my father.

  • Contractors CONSTANTLY complaining of NOT GETTING PAID. How the hell does that make us feel after giving money to LMB!!! Even had to pay one of the contractors directly and minus it of the total amount owed to LMB. Ridiculous. This can be proven with signed receipts from them and him

After giving up on LMB I decided to pull the contract. After which:

  • Threats by his solicitor trying to take me to court even when next stage of hadn’t been completed (as per contract). As in the letter , apparently I gave no reason as to pulling the job ?! More lies fed to the solicitor I guess.

  • BTW, Lee don’t be childish by showing your solicitor John all the nice conversations we had. If you want, talk to me face to face and don’t hide behind your solicitor and we can go to court and ask Whatsap for full undeleted transcripts.

  • Lee Murphy had threats to take scaffolding down when roof hadn’t been completed or sealed watertight when two elderly pensioners reside inside.

  • Claimed he owned the materials on the driveway , so decided to take them away. so Police were called. He even took the staircase , claiming it was his :slight_smile: Proof of how I paid for it, I easily can be prove in court . Even have Lee on CCTV and microphone on drive him taking the stuff which I will release when necessary.

  • Also, he told his workers to call me to offer a service to finish the job for double the price with him taking his cut. They can all back me up. Disgusting.

There is actually a lot more I could write up on…and all will come out in due course with the necessary evidence(or/if this goes to court). All of above can be proved with screenshots of FULL Whatsapp messages, text messages, CCTV recordings, police reference numbers, etc… and Mr Murphy cannot refute any of it

As of Dec 2018 Mr Lee Murphy has yet to take me to court or follow through with threat. That’s the power of the freedom of speech and the truth.

#LMBGroup # LMB # LMB Croydon # loftconversioncroydon # LMBLoft #loftcroydon #croydon


Hi there,
I’m a little late to the party on this thread but would love to know what you uncovered… I’m about to do a loft conversion myself and would be great to know who to avoid or anyone you highly recommend.
Also… I can’t seem to PM either (Chris?)


Hi James, did you find a good builder for you loft conversion I’m the end? Would love any tips!


Me too - please let me know what you find out! I’m particularly interested in the companies to avoid…


James, I’ve PM’d you.