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Phod thanks for your reply. The colour of the water from the radiator was also back. The c.h. engineer had to drain the radiator down to replace the stuck open Danfoss thermostatic valve, so it was very obvious. Everything I have read said that black or dark brown water is a problem. The...

I decided to get a professional in as I also needed a faulty thermostatic valve changed. It was stuck open. He looked at the dark brown water, run it through his fingers and said there was no grittiness, and said that the system did not need to be cleaned. According to him his system also has...

Thanks again Doggit. I appreciate you coming back. Thanks also to the others who contributed. I appreciate your input.

Thanks again Doggit. Much appreciated. Would you mind answering 2 supplementary questions? Can I simply add X400 to the system as is, or does the system have to be run through with mains water first? I like to understand how things work. Why was it a flawed method of attaching a tube down...

Thanks Doggit I didn't intend to put a hose on the system. I just intended to open up the filler valve and the Spirotech drain tap at the same time and let the water run through the system to hopefully eventually see clear water. I don't feel the system is sludged up, it is more a question of...

It's good to know that the pipes are ok. Of the 10 radiators 7 are Kermi. There were 3 small radiators changed/added to the system and I can't identify the brand. There is no indication of brand on the towel rails. Even if the 3 small radiators plus 2 towel rails were cheaper, would...

Thanks for your help. It is difficult to see the markings on the pipes in situ, but what I could see was Hep 2o, ISO 15876-2, Class 5/6, Bar KIWA Class 2/10. Can I assume that this is kosher, or are other details required? All the pipes to and from the boiler are copper, but I know that the...

I know this has been discussed a number of times, but I would really appreciate a reply specific to my system. We are 2 years in a new build with a Veissmann condensing boiler and plastic pipework. At the beginning of the c.h. installation I requested the installation of an MB3 Spirotech...

Paul C Thanks for that. The reviews seem quite positive, so will give it a try. I haven't tried anything other than vinegar yet, which was unsuccessful.

Thanks for taking the time. I will have a look in Topps.

We had a feature wall done in the bathroom with rippled cream glazed porcelain tiles. I don't know what the tiler did wrong, but there is a wide grout haze around each large tile. The tiles were essentially meant to blend together so when looking at the wall you saw a virtually uninterrupted...

What do you mean by weigh up the likely consequences? What are the likely consequences? I have read that some flooring manufacturers are requiring that underlay with a foil DPM should even be used on a chipboard floating floor above the concrete floor. What harm would there be in using a foil...

Thanks for your reply. But there is an electric mat for underfloor heating that has to be laid in a fairly thick screed first. Is it still necessary to lay ply first, then the electric mat with the screed?

If there is a chipboard floor and an electric mat for underfloor heating is to be laid, is it necessary to lay ply over the chipboard first or can the electric mat just be screeded onto the ply?

Sorry. It is engineered wood on top of chipboard. It is an upper floor. I was tending towards Duralay Timbermate Duratex, but It is only 3.6mm thick and I need 6mm in order to bring the level up where the engineered floor meets a tiled floor. I am now thinking of Novostrat Supreme Sonic Gold...

I am looking for recommendations for the best acoustic non vapour underlay.

Am I correct in assuming that acoustic battens are essentially for the reduction of impact noise transmission downwards through floors and that they are not much benefit for reducing the upward transmission of sound from a room below? There are resilient bars on the ceiling below. Would an...

Thanks again. We are all on one level on the top floor of the block so our ceilings are fine. The ceiling below is apparently ok due to various materials that comprise a deep floor. Why do you worry for the future? There is a 10 year NHBC warranty in place. Can you explain why lifting the...

Thanks for your further comments. The problem has resulted from differential settlement of the timber frame. There is a central concrete stair core right up through the building. As you probably know timber frame construction will shrink and settle by up to approximately 12mm per floor as it...

Thank you for your reply. The skirting is down, but the builder intends to remove it all then replace it after all the floors have been sheeted in ply and leveled right up to the walls. The lounge, hall, 2 bedrooms, bathroom and possible small study needs doing. Do you believe that firring...