Green Building Forum - Insulation Tue, 19 Dec 2023 08:40:47 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299292#Comment_299292 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299292#Comment_299292 Mon, 19 Dec 2022 10:47:26 +0000 Rex
I have a two bed first floor maisonette that we rent out. It is double glazed, original (minimal) loft insulation, an old Potterton boiler that does not go wrong. The gable wall is cavity insulated, the front and back are not as the external wall is tile hung.

I read in today's paper that new legislation will require me to achieve a minimum EPC level to be able to continue to rent it out.

Certainly, the loft could be improved relatively easily but at a cost to storage space as the floor level would have to be raised.

The boiler would cost an arm and a leg as it is currently internally and new boilers (I believe) have to be on an external wall which would imply a virtually complete new plumbing.

When the elderly couple on the ground floor took advantage of a government scheme to subsidise the cavity wall insulation, they took up the offer and I had to pay for the first floor gable wall to be done, as the insulation company would not do half the wall. But they would not insulate my front and back as the walls are tile hung.

Given that I do not want to replace the old boiler as it is regularly serviced and never goes wrong, and that the external tile hung walls will be are very difficult (expensive?) to insulate, what am I , and I guess, many, many others expected to do to achieve the EPC level?

Thanks and have a Cool Yule]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299293#Comment_299293 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299293#Comment_299293 Mon, 19 Dec 2022 11:02:11 +0000 WillInAberdeen
Do you have a current EPC? (legal requirement)? It will have a list of recommended improvements on the back and will say what level each will get you to. If it's an old one then get it updated and ask the assessor for advice while they visit. If there are similar flats nearby, you can download their EPCs to see what insulation they have and what level it gets them classed as.

But a condensing boiler with good controls and a load of loft insulation would be good starting points, while you work out how to insulate the walls (EWI with tiles replaced over?)

Replacing the boiler might be tax deductible (maintenance). If your tenants qualify, then you can get ECO funding to pay for the other upgrades. (Or even if they don't qualify, from next year aiui).

Edit to add: while we were renting, the ancient internal boiler failed in a spectacular fashion and was replaced with a wall-mounted model, the additional couple of pipe runs were not really a big part of the cost (especially compared to repairing the smoke damage!).

Further edit: does it have solar PV fitted? That earns lots of points under the old rdSAP 2012 version which is still used for EPCs.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299296#Comment_299296 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299296#Comment_299296 Mon, 19 Dec 2022 14:43:36 +0000 Peter_in_Hungary Posted By: RexThe boiler would cost an arm and a leg as it is currently internally and new boilers (I believe) have to be on an external wall which would imply a virtually complete new plumbing.

I have a rented out flat and the modern gas boiler (now 2 years old) has the balanced flue up and out through the roof. The boiler is in a corner of the kitchen and the flue goes up through the first floor in the corner of the room and is boxed in. The installer thought this was easier than putting the flue through the 50cm stone wall and have the attendant problems of window / tree / other wall proximity issues. Could your new boiler flue also go up through the roof enabling minimum plumbing disruption?
Oh and son in law had to replace the gas boiler in his rented out flat and the old boiler flue went up a chimney - no problem they installed a balanced flue in the chimney - a bit expensive but the cheaper of the other alternatives.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299299#Comment_299299 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299299#Comment_299299 Mon, 19 Dec 2022 16:35:00 +0000 philedge Posted By: Rexwhat am I , and I guess, many, many others expected to do to achieve the EPC level?

As youve likely already worked out, options are-sell up or stick your hand in your pocket!

Get a couple of plumbers to look at the boiler in the spring and they'll let you know what your options are.

Loft insulation is straight forward and relatively cheap to install.

Unless the outer leaf of the tile hung wall is set in to give flush tile hanging, it's likely the CWI people wouldnt do the tile hung sections as they dont want to damage your tiles. Get a roofer to remove the tiles so the CWI guys can get in to drill the injection holes. If the outer leaf of the wall is set in, therell be negligible cavity to fill so EWI or IWI with the cavity sealed up]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299300#Comment_299300 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299300#Comment_299300 Mon, 19 Dec 2022 17:05:58 +0000 jamesingram Ive had several enquires already but am trying to talk them into putting something more viable up in terms of effort and investment.
ECO4 includes solar , those on certain benefits and incomes below £30k can apply , this includes tenants.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299316#Comment_299316 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299316#Comment_299316 Tue, 20 Dec 2022 17:29:48 +0000 Rex
With the exception of a new boiler, all other recommendations would only take me a little higher up the D rating.

A new boiler would go well into C. The current Potteron has the flue through the loft in a brick chimney. Is it not possible to install a replacement boiler in the same, internal location?

What about an electric boiler?

Regarding loft insulation, at the moment, it is probably the original; around 4" set in the joist with a plank flooring. Rather than removing all the planks, could I put 4" joists onto the existing planks, add insulation and then board it with the regular chipboard flooring?]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299329#Comment_299329 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299329#Comment_299329 Wed, 21 Dec 2022 16:59:29 +0000 WillInAberdeen
As was mentioned, you might be able to add a balanced flue up through the chimney or ceiling. You might also need to add a drain pipe for the condensate underneath the floor. It might be cheaper than all that to move the boiler to an outside wall, the fitter will advise you when they quote.

You'll want 300-400mm total thickness of loft insulation, the new chipboard floor can be raised above it on loft legs (bought, or make your own). Is there a gap for air to blow underneath the existing loft flooring, if not I don't see why not leave it in place. Or lift and reuse some of it, to save lugging new chipboards up the stairs.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299406#Comment_299406 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299406#Comment_299406 Tue, 27 Dec 2022 18:28:51 +0000 Rex
I would guess that a new boiler would have to be moved as the current one is in an internal cupboard with a flue chimney.

But now thinking that if I have to replace it, perhaps an electric boiler is the way to go.

As for the loft flooring, don't think I would go as far as 400mm as that would restrict the loft head room. Perhaps a kinda token normal loft roll as additional insulation.

One of the thing that is not on the EPC list would involve re-sealing all the window surrounds as whenever they were installed, they leak badly so assume very poor workmanship.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299408#Comment_299408 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299408#Comment_299408 Tue, 27 Dec 2022 18:55:42 +0000 Peter_in_Hungary Posted By: RexI would guess that a new boiler would have to be moved as the current one is in an internal cupboard with a flue chimney.

No reason why you can't have the new boiler in the cupboard with a vertical balanced flue following the existing route (assuming it is straight)]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299409#Comment_299409 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299409#Comment_299409 Tue, 27 Dec 2022 20:26:28 +0000 marsaday
Your are currently breaking rental rules by not providing your tenant with the EPC certificate. I would do it next week and then it is done. Have you also provided your tenant with the right to rent booklet ? Again more regs. Have you got your 5 yr electrical check certificate showing the electrics are all ok ? Have you now got your carbon monoxide test in the room with your boiler ? Have you also got your smoke alarm system ?

I assume you will get your annual gas cert done, but a lot of regs have come in in the last few years. The latest is the carbon monoxide alarm which is needed in a room with a gas boiler. This came in, in Oct 2022.

Your property will easily get to a C and a new condensing boiler will probably do it. The EPC C requirement is due to come in for 2025 (new tenancies) and 2028 for exisiting tenancies. However, I was watching a presentation last summer by the RLA and the date has been put back to 2026.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299410#Comment_299410 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299410#Comment_299410 Tue, 27 Dec 2022 23:23:01 +0000 WillInAberdeen
IE a new electric boiler will make your EPC worse than it already is with your old gas boiler. Could push you down to an E rating, so you would have to rip it out again before the new regs come into force.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299415#Comment_299415 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299415#Comment_299415 Wed, 28 Dec 2022 11:42:33 +0000 WillInAberdeen
Or is there some other usage happening in the loft that needs lots of headroom?

Edit to add: fibreglass comes in a range of grades, the stuff in DIY stores has a worse insulation performance (0.042 W/mK) than the highest-end stuff sold for timber frame walls (0.032), so the thickness can adjust in proportion to that.
If you use high performance fibre, leave the wrapper in the loft for the EPC assessor, they have to be able to see things to believe in them.]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299429#Comment_299429 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299429#Comment_299429 Thu, 29 Dec 2022 16:11:09 +0000 jms452
https://zypho.uk/zypho-solutions/zypho-retrofit-heat-recovery-installation-epc-score/]]>
Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299716#Comment_299716 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299716#Comment_299716 Wed, 18 Jan 2023 11:36:57 +0000 djh Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299726#Comment_299726 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299726#Comment_299726 Wed, 18 Jan 2023 18:35:44 +0000 borpin Posted By: marsadayYou're are currently breaking rental rulesThat does depend on where in the UK as the various regulations do vary.]]> Insulation http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299776#Comment_299776 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17671&Focus=299776#Comment_299776 Fri, 20 Jan 2023 17:14:20 +0000 Rex
Don't think the tenants have anything heavy stored; the biggest problem is the lounge / dinning area is quite a large room so the existing joists are essentially all that was needed in 1960 when built. There had never been any evidence of the ceiling sagging. Most of what is stored is above a supporting wall.]]>