Chit Chat
There is currently 1 person viewing this thread.
These 49 comments are related to the topic:
any roofers/builders condensation prob.
any roofers/builders condensation prob.
sort by:
Show
per page
Replies: 49
|
By:
dont leave the loft hatch open, them massive spiders up there will be down
 |
|
By:
It's surprising how much error there is in the building trade with regards to the causes of damp in houses.
If you get a damp patch and there's no external reason like water from a drainpipe, gutter, or something up against the outside of the wall, it's almost certainly condensation. I suppose it could be driving rain on a solid wall with no rendering in extreme circumstances, but it's unlikely. You can forget the rising damp myth as well. That is simply a money spinner dreamed up by the trade. The only way to cure condensation properly is to insulate and dry line. That way you create a surface (plasterboard) which can heat up quickly and stay warm. No more damp. Of course if you insist on drying washing in the house you should get a dehumidifier. I've seen modern insulated flats go damp due to constantly drying washing indoors with no ventilation. |
|
By:
My house was dripping wet and covered in black mould when I bought it (it was very, very cheap). On the outside it had pebbledashed cement render, which had cracked, as all cement render does eventually. Rain gets in the cracks and can't escape, as cement is waterproof.
Indoors there was wallpaper over gypsum plaster, with black bitumen damp proofing behind them. Everywhere there were draught excluders, and the windows obviously hadn't been opened in yonks (previous owners were OAPs). Hence, with no ventilation, just permanent condensation, as Dr Crippen describes. Damp, but NOT the mythical "rising damp". I had the wallpaper, gypsum plaster and damp proofing hacked away, and behind all that were the remnants of the original limewashed lime plaster (you can tell it is lime from the horsehairs used to bind it). Lime plaster is breathable, hence the absence of any damp problems in the original building, before the gypsum and damp proofing had been applied.The bare walls were layers of rough brick, almost rubble, nearly a couple of foot thick. They were sodden with condensation which had run down cracks in the gypsum and the damp proofing. It took months for them to dry, but once they had, I had the walls replastered with lime, and painted with breathable water-based paint. I removed the draught excluders, made sure the odd window is left on the jar sometimes, and not a single problem with damp or mould in the eight years since. (I also had the outside cement render removed and replaced with lime render.) So, that's another way of combating damp. To me the key is not to try to keep damp out with waterproof materials (that's impossible, there will always be cracks or imperfect joins), but instead allow moisture to escape, with breathable materials. |
|
By:
Rising damp is not a myth. It is caused by untrained surveyors (and estate agents) using damp meters calibrated for wood.
|
|
By:
... whose brothers-in-law have a damp-proofing business, whose damp-proofing work results in more damp, which shows up the next time the property is marketed, ad infinitum
|
|
By:
A few post here seem to frown on boarding out the loft.
Not so, uncovered insulation allows the air to circulate around it and take the heat away. Boards slow down the heat loss considerably. And usually, a boarded out loft allows you to stash all manner of boxes and stuff up there, which is all extra insulation. I boarded out a loft years ago with insulation underneath, the roof is felted with no air vents. No damp, despite the house having central heating. Some of the boards were taken up recently for a wiring job, dry as a bone underneath. |
|
By:
https://m.youtube.com/watch?v=QeHGDr81XwM
|
|
By:
CC hardcore vid
|
|
By:
Very good breadnbutter.
I notice he asked for suggestions on how to improve the system. Well I'd suggest running an extension lead to the tent and using a blow heater. I don't know about cooking those sausages though, they look a bit ropey to me. |
|
By:
Dr C....some good points (as usual)..
No such thing as "Rising Damp"! If you want to prove/disprove that, put a brick, on end in a receptacle of water, to half up the brick,,, Make a cup of tea, and come back to watch the water rising! Ok it didn't so have another cup of tea...same thing! A thousand cups of tea later, has the water level risen in the brick....has it ***k! Re damp patches....this will occur on the coldest surfaces, particularly in outside corners, and worse if those corners are, for instance, inside of a wardrobe! If they are random patches, in the middle of outside walls, they are definitely wall tie problems! |