MikeGrahamT21

Use some marmox on it: http://www.marmox.co.uk/marmox-dry-lining You can also get curved boards too: http://www.marmox.co.uk/products/curved-board Treat them exactly as a plasterboard when plastering.

Extension was built where we had paving flags before hand, and basically all you can see is the cement which was under the flags which is pretty decent, but has holes in places. Yeah we've got plenty of air bricks and cross ventilation, including in the sleeper wall, which has DPC on top of it before the joists, so no damp will rise from there into the timbers. I stuck a soil probe into the bits i could get to, and it actually registers as dry, so it perhaps is just dark soil which 'looks' damp. Attached to this extension is a utility, and when they were building that, we had a huge downpour which filled the cavity between this extension and the utility, the concrete foundations are also higher on the utility, and I've a feeling its just the damp from that still percolating its way through which will evaporate in time. Because there is no floor down at present in extension, the airflow is going to be massively hampered, as its just coming straight into the room, once the floor is airtight, the under floor ventilation will improve massively.

Hi, We had someone in to do the foundations for an extension i built three years ago, and they forgot to put any DPC down under the oversite, now i've swept and hoovered the base, i can see areas of soil which are damp (no idea how with how dry its been). I know older houses have this style oversite anyway, so would you do anything? And if so what? Thanks for any input. Regards Mike

https://www.ebay.co.uk/itm/Powerful-Inline-Loft-Extractor-Fan-4-100mm-made-by-Vent-Axia-Black/401391020024?hash=item5d74c4e7f8%3Ag%3AKOEAAOSwwE5WUxle&_sacat=0&_nkw=vent+axia+in-line&_from=R40&rt=nc Thats the cheapest 100mm in-line fan by vent axia i can find on ebay. My be worth changing for a centra though if you can change the ducting pipe for a longer one, should be a better overall experience.

Is this just a standard 100mm fan? Why not replace it with a brand new one, Vent Axia Centra Lo-Carbon is the one i've used, you can pick them up on ebay for around £50, will be a lot quieter than that old one, and use less power, plus its also a dMEV so will give continuous trickle extract ventilation.

Ive just had some samples of bamboo flooring through the post, and is say its probably a product which won't bend easily like laminate may to fit the unevenness. Not sure myself just how perfect it needs to be for a good finish.

God I hate wood worm! I've spent all day ripping rotten joists out and underpinning partition walls. Tomorrow, I start installing the new manifold heating system, looking forward to it, though going to be very tricky with no floors up trying to hit smallish holes in the floors in each room. Luckily 4 of 7 radiators are in the area where the floor is currently up so they will be nice and easy to do. Looks like the builder who did the foundations on the extension managed to get the floor 10mm lower than the old house, presuming overlaying the joists with treated 10mm timber screwed and glued to the top of the new joists will be fine?

Wow, didn't think house insurance would cover such things, will bear that in mind for future. All the floor is up now, the worst thing I found bar the woodworm, was one of the joists sat on a sleeper wall with an electric cable sandwiched in between! Must have been like that for about 30 odd years. It is nice knowing that things are correct once i've done them.

Underneath was clean, nothing to report, so yeah, i guess the only sensible explanation is the radiator has been leaking for the last 5 years, explains why i've needed to keep topping it up!

Yeah, i thought the same, but feeling round its dry, unless it only leaks when hot, i.e. more pressure.

yeah thats true, i guess the cold from the airbrick would make moisture accumulate here.

Under the floor boards looks fine, and doesn't have the damp stain, just a million wood worm holes in the joists! oh well i knew they were there anyway

Currently lifting all the carpets and floors in the little bedroom in preparation to knock through into the new extension... Floor construction is suspended timber, absolutely no insulation whatsoever at present. About 5 years ago, we had a leak on the radiator pipe where this black mould is, the stain on the floor would lead you to believe its still wet, but so far it all feels dry, though i've not lifted the floor board there yet, but the carpet grippers around this radiator pipe were coated in thick black mould. Underneath this area is an air brick, though its now open on to the extension though still gets to around 5c in winter. Humidity levels in the house are always around 50%, even through winter, with temperature around 20C. I just can't understand why mould would grow next to a hot radiator pipe of all places?? Will report on my findings what is beneath the floorboards...i dread to think

Just found this online: http://www.safetyassured.co.uk/products/ Would need the non standard cavity barrier, classed as a finger protector.

Yeah, the magnetic stay is absolutely fine on our, but this is more a belt a braces approach for the people who 'forget' to use it!

lol, love it!

Hi Does anyone know of an anti slam device for the opening door of bifolding doors? cheers mike

Yeah thats cheaper than toolstation, though i certainly don't need 6 bottles for what im doing! lol

Its a 1960s build, and the boards definitely don't line up to the joists, i know that from other rooms i've done! I'll stick to my previous practice of lining board ends up to joists

Yeah, i'll be doing it by myself. B&Q sell shorter boards (cerca 1600x634, instead of the usual 2400), which means i'll be able to fit them in the car and avoid delivery costs). Not too bothered about cost difference between the boards, I just want the best product. Always a bit dubious of chipboard and any potential water on them weakening them, hence why OSB3 is my first choice, plus its also classed as a load bearing product which chipboard isn't. Joist spacing is a little over 500mm, so we can't go for any less than 18mm OSB or 22mm chipboard. I'll aim for the OSB i think! And get some D4 glue from toolstation next time i'm down there.

For clarification, the 18mm OSB3 provides as much strength as 22mm chipboard too. Would you prefer chipboard over OSB?

How do you normally install your floor boards, do you cut to the joist, or ignore the joists and rely on the tongue and groove? I've always cut to the joist in the past, but i've heard people doing it the other way too, and relying on the T&G for the joint. Obviously the latter will result in better joints and less waste, but is it strong enough? We are considering 18mm OSB3 TGV4, or 22mm Chipboard TGV4.

OK, looking at those diagrams, i'd say all of the ones i've looked at so far are counterflow.

OK, will keep an eye out for a counter flow unit.

So they quoted 89% efficiency i think for this unit, how can it only be 60-65? I'll keep on the lookout for counterflow, makes sense air at 90 degree angles to each other would pass more heat. All good information this!