Browse Forums DIY, Home Maintenance & Repair 1 Feb 08, 2010 8:32 am We have been advised that we have rising damp in the front two rooms of our terrace, we have been advised to have sub floor ventilation installed in the form of an electric fan, however after heavy rain the walls are wet if you wipe them, does anyone know if the fan will prevent this? thanks also the floorboards have buckled, would we need to replace them or if the problems is fixed will they be ok? Re: Rising Damp 2Feb 08, 2010 9:10 am You may have a problem with your stormwater. It may be broken and or blocked and allowing water to flood under the building. You may have water seeping under the building from an area that cant drain properly so it drains under the building. You need to access under the building and see how much water is gathering there. First you have to ascertain if the stormwater is fuctioning as it should. It may be blocked. Put a hose in the gutters and see if it flows out in the street. if it doesnt, its blocked or its running to easement, although older places in the inner city usually run to the street. Look for outlets in the street to find out. if the kerb has outlets, the water runs to the street. if its blocked, you need a plumber to either unblock it or run new stromwater lines. If it runs out to the street, put some dye in the gutters, vegetable or flourosceine dye from a plumbers supply. then access under the house and see if theres dye coloured water under there. if there is, you need a new storwater line. if its natural seepage and water just collects under the house, you need a pit built under the house to collect it and a pump installed to pump it to an outlet and the underfloor area graded to allow water to flow either to the pit or to a stormwater line if one is available.. Re: Rising Damp 3Feb 08, 2010 9:21 am Thanks, we also have a leak where the single level joins the double level of the house (if that makes sense) and have been advised to replace the sealant and install a rod which is being done, we have only recently noticed the damp but seems to be quite high on the wall so am hoping that there is no other damage in the sub floor Re: Rising Damp 4Feb 16, 2010 10:51 pm Strange as it may sound.. rising damp looks worse when it is drying out The crystal formation is the telling sign that it is in fact drying... The signs are - cotton wool looking stuff that reduces to a powder when touched. If you hit it with water it will disappear. But will return again during drying Where you are coming from is where you are going to... Re: Rising Damp 5Apr 01, 2010 8:50 am We still have not managed to solve the rising damp issue and I am very reluctant to fork out money on chemical injections. Our pre purchase building inspection report which was done less than two years ago makes no mention of rising damp and now we seem to have quite a big problem, to me there must be something which has caused the rising damp, we do not appear to have water pooling under the floor as we have now had several holes cut in the floorboards as we will be replacing them all once we have rectified this issue, however the damp smell (when we open the man holes) and the walls are always worse after heavy rain so at the moment I think drain inspections are the way to go - having researched this more some sites advise that the majority of rising damp is due to damaged pipes is this true??? Have look at your house plans and you will probably find that brick articulation joint has been missed. Maximum allowable spacing is 6M or 5.5M for a wall with window… 17 20577 Firstly the ableflex that has been installed needs (manufactures specification) a sealant cap over the top, preventing water draining down between the slab and the… 3 7776 Hi all Am new to this forum. I want to get some ideas/info about how to manage an 80 year old factory restoration to convert to a residence. The factory floor is concrete… 0 6341 |