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No dpm u/lay manufacturers say their u/lay is unsuitable for use on floorboards. Infact the u/lay i am currently using says dpm should be used on all concrete subfloors and also on any floor which may allow moisture to pass through. ie: draughty gappy floorboards with cold dampair passing...

I do what is required to stay withinin the warranty. Science of ventilation? so how is this science fine when covering the same floor with vinyl? surely that would have the same detrimental effect as you are saying i would have by using a dpm. Opinions of what is best change over time and it...

You overide the manufacturers instructions and invalidate their warranty and ask your customer if they are happy with this? Not sure customers would go for that and i'm not sure i would want to indemnify it. I would rather follow manufacturers instructions so if anything fails i know it wasn't...

[/url] Oh and yes, they are the dogs, and yes you can trim most doors without removing them which is very handy as a door cutter is now £300+

Hi, your talking i think about a jamb and undercut saw, we use roberts which are very good, but others are available. http://www.carpetfittersshoponline.co.uk/roberts-long-neck-jamb--undercut-saw-rws169-207-p.asp

We must however adhere to manufacturers spec or run the risk of invalidating our customer warranty. Fitters will always leave themselves open to blame unless the follow instructions to the letter. You go fit 50m2 of grandeur skirts etc and it goes wrong, now no matter what the reason for the...

The thing is imo, i think the problems would be worse if you have cold damp air in contact with your flooring as it could have an immediate effect on your new floor. Are the problems with dpm over floorboards a big problem? If so then how about all of the millions of m2 of vinyl flooring...

http://www.quick-step.com/europe/uk/en/faq/0012.aspx To avoid problems caused by rising damp, you must always lay a plastic foil. If you choose a Quick-Step® underlay, the correct moisture barrier is already attached to the underlay

http://parquet.quick-step.com/media/downloads/installation/Multifit/en.pdf as you can see quick-step only recomend a dpm underfloor system for their engineered wood flooring :-)

I am 100% sure that you need a dpm to stop cold damp air comming into contacy with the back of the flooring through gaps in the old floorboards. Idealy "On ground floors a surface moisture inhibitor such as a DPM Underlay or 1000g Visqueen must be laid with joints over lapped by 6” (150mm)...

Can't agree with any of that....sorry! Howdens engineered although not top quality is not too bad, i also think it is a 14mm engineered board with a 3.5mm wear layer (pretty much standard.) Also i would say yes to a dpm on an old house with airspace below the subfloor. The air below the...