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Hi, I am trying to remove efflorescence from the house. I managed to remove it on one wall but I am not happy now with it looking darker like being wet. See photo. I plan to use less acid on the adjacent wall to avoid the same problem hopefully but I am not sure whether to clean the rest of the...

Hi, I am trying to remove efflorescence from the house. I managed to remove it on one wall but I am not happy now with it looking darker like being wet. See photo. I plan to use less acid on the adjacent wall to avoid the same problem hopefully but I am not sure whether to clean the rest of the...

Hi all, It sounds like a simple thing, but I'm confused about what regulations govern this. I notice my house tends to have metal capping over the wires. Is this an older regulation, from before the RCD requirement came into force, or is it still relevant today? As far as I can see...

I'm getting quotes for having my drive done. It's about 30 square metres, 10 metres long, 3 metres wide but it's on a 1 in 7 slope. There's no drive there at the moment, so has to be dug out, the existing earth disposed of an aggregate laid. I got one estimate of £8000 incl. Is this the...

I've recently had a combi installed and, due to the fact that the gas meter is a long, long way from the electricity meter they said it would be easier to put in an earth rod to connect the gas pipe to earth, rather than take 16mm cable all the way back to the electric meter. I didn't see them...

Which one would be better? Moisture resistant or foil backed for the ceiling in the room below the loft? Originally I was supposed to insulate in between joists with insulation, then thermal laminate, then foil backed plasterboard. Instead, the insulation in between the joists was moved in...

I have 100mm of insulation between rafters as per drawing. Now I need Kooltherm K18 to the underside of the rafters but the drawing doesn't say what thickness to use? It says next I will need 12mm thk foil backed plasterboard, skimmed. I don't understand. Why do I need that as well? As...

Hi, I would very much appreciate if there is somebody who has experience in cutting insulation boards and can give advice on what is the best way to cut them. Even if I take perfect between the rafters measurements for a snug fit I cannot fit the board in. I cut it with a panel hand saw for...

Can someone see anything wrong with this plan? My drawing specifies insulation (100mm) between the joists in the loft (pitched roof). I want to move it all between the rafters (150mm) so I can have an insulated attic space. I know that in this case the roof needs to be ventilated so I will...

I believe these are identical with regards to R and U values. Which one would you go for if they cost the same? Thanks.

My supplier offered to sell to me Celotex GA3100. I know Celotex manufacturer replaced it with GA4100. Would I make a mistake by accepting GA3100? Perhaps it has poorer qualities than GA4100? Do both of them have the same U value? Do you know what their U value is? Many thanks.

Hi, I am putting a floor in for the 1st floor bedroom above the garage and in the loft above the bedroom. 1st floor: There will be a plaster board screwed to the underside of the joists. QUESTIONS: What kind do I need as that will become a ceiling for the garage i.e. fire risk? Is...

Hi, I was wondering if there are any equivalents to Kingspan K7, K18, K3 that might be a lot cheaper but just as good? Does any of them have acoustic insulation properties or which Kingspan does? Cheers, much appreciated.

Hi, I am rather puzzled by the following note (extracted from our drawing): "Provide 100mm thk kingspan k7 between joists with kooltherm k18 to the underside of the ceiling joists." Is 100mm the total of k7 and k18? If so what should be the thickness of each? And in what order do I place...

Hi, can anyone advise if anything goes between heat spreader aluminium plates holding underfloor heating pipes and ceramic floor tiles. I understand that it is important that the floor decking is in contact with the plate to maximise output. Does it mean I can tile straight onto the spreader...

I'd like to pick your brains if you know or have experience with a house that has a combination of both radiators and underfloor heating. They are not two separate things with their own boilers, are they? It is all one system, isn't it? I am just looking into what boiler to choose that would...