Suspended timber floor decay causes
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- Опубликовано: 25 сен 2020
- This video goes through some of the causes of timber decay and woodworm in a suspended timber floor. Just because a sub floor has poor sub floor ventilation, don't just jump to the conclusion this is the only cause.
If you have a property that has sub floor decay, get your hose out and flood those gutters and drains....It would also be prudent to get a CCTV drain survey......any questions drop them in the comments below.
Whilst this video is on the longer side, this does give tips to you that might help you at least work some of this out for yourself, or at least choose a competent contractor to repair your issues.
I will edit part 2 of the video shortly, and you can see how I dried the suspended timber floor down.
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#dryrot #wetrot #timberdecay #risingdamp #damptreatment #dampsurvey #diydamp #drainsurvey #Wiltshire #renovation #cctvdrainsurvey #damptreatmentforwalls #subfloorventilation
Excellent video. It's great because you aren't using any fancy equipment, yet you are making some great diagnosis which most people would completley miss.
I'm glad you like it Paul. This could be a very costly mistake especially on a pre purchase survey.....Just goes to show what a damp can do to those timbers. Also got a good video of condensation to flooring nails. I will be using this on another video about where to look for a timber decay issue, with limited opening up :)
Excellent video,
so what did you do to resolve the issue?
Thanks for the kind comment :) I will do a short video on the drying of the sub floor void, along with all the data logging of it. If you look on Instagram (Complete Preservation) you will see a thermal imaging video of the drying equipment in action.
Good stuff. One Question: how long does/can it take for wet rot to take hold?
I'm thinking Scottish conditions with sort wet days of winter then long drier days of summer giving an annual cycle where the rots can progress then stall, and go again the next winter, taking years, possibly, before you spot the rot and then step through the floorboard at the worst point, adjacent to a weather facing air vent delivering 95%-99% humid cold air for weeks onto the joist flooring 😬.
Some exposed place in England will be nearly as bad😟.
It really depends on the conditions and the length of time of those conditions. Wet rots will intermittently start and stop just like dry rots. I did mess about with this a few years back and I couldn’t kill off either, as soon as I introduced moisture they started again. I have got one I’ll post I have been doing on dry rot as it’s quite interesting 👍
Just to say we had a local building preservation surveyor round to look at our scenario (we'd discovered the rot originally because I wanted to install an underfloor telephone line). The surveyor confirmed it was wet rot, without rising damp, and reckoned that it had probably been developing over 10+ years with annual spurts through the winter. The solum is glacial rubble, so while well drained from a water table perspective, it does have a lot of capillary moistness from the slope behind.
Being only a crawl space under the floor boards there is also likely to be a radiative heating element direct from the under-floor to the solum that increase the moisture load (opposite direction of radiative heating compared to underfloor heating of living space systems).
We've also found one downpipe had a leak about 30cm above ground level (adjacent to the worst rot) and all the air bricks are only 3cm above concrete path and the air directly impinges on the adjacent joists. So lots of contributing factors. @@completepreservation
I was wondering what causes the moss to grow on the roof as there seems to be more and more roofs with moss build up where I live
Moss likes shady damp areas, thats why sometimes you might see it on one side only buddy
Hi Ross
Do you take pictures to show drains are not blocked and add then add them to your report?
Hi Dave. I wouldn't perhaps take a picture of a drain that doesn't have an issue, and add it to the report....more prudent to take a picture to keep just incase of a future issue with a dispute.
Wheres part 2?
Not done it yet… haven’t had a chance 👍
Have you done part 2 yet Ross? Very informative