Hi Jonathon
If you can stop any more water coming in to your caravan by sealing it with something like silkaflex sealant then there is no real reason for the dampness to become any worse.
You can get silkaflex from any caravan accesory store or from Towsure who also do on line mail order. A really good place for any sealant or bits and pieces is C.A.K. Tanks,in Kenilworth
Their website is www.caktanks.co.uk
I thought it was an unfortunate choice of name as well, but it stands for 'caravan accessories Kenilworth' apparently.
Dont worry about asking questions, that is what forums are for and there are some really clever people on here.( Sadly, I'm not one of them!)
If you have any signs of black sooty mould these are damp spores and are best not inhaled. They can be removed using a cloth dampened with a weak solution of household bleach.
I've heard it said that damp can be removed from caravan walls by using dehumidifiers, but I can't help thinking that unless you block every apeture to the outside of the caravan, then maybe you would be running the thing for ever.
Try opening the doors,windows and any vents to the outside on a bright, breezy day, like it is here in the Midlands today and allow some good fresh air into the caravan. Mind that no tom cats get in though, you'll never get rid of the pong.
Caravan floors are made from ply wood and consist of a sheet on the bottom,then a layer of insulating material, then another layer of ply on the top. This is all bonded together, and with age and the odd spill or leaky pipe the solvent, or glue, breaks down and the bottom and top ply seperate. A gap forms and this is delamination.
The solvent to repair this can be bought from flea bay or Apollo Chemicals. I think that they are in Tamworth, Staffs, and do mail order.
A comprehensive set of instructions have been posted on this forum and if you find out how to access the archive you will probably find them under 'Floor Delamination' ( I'm a computer dinosaur I'm afraid)
Basically the repair consists of lifting the carpet, cleaning the area, drilling holes of a given size through the top layer of ply and injecting the solvent. Ventilation is important when doing this and care must be taken not to drill all the way through the floor. The holes are drilled in a regular pattern.
When the repair is dry a day or so later the job is tidied up by scraping the excess solvent with a stanley blade. The job can be a bit messy but can be done by any diy-er.
Regarding the brakes, first check that the 'over run'is working properly.This is where you push your hitch back and it releases the brakes when you are reversing.
If you jack one side of your caravan up it is important that the opposite wheel is securely chocked otherwise the caravan will come off the jack, probably when you are under it. :O(
It helps to hitch the caravan to your towcar for added safety.
At the back of the brake drum is an adjuster and as you turn the wheel in a forward direction you tighten the adjuster untill the brake stops the wheel from turning.
Turning the wheel forward gradually slacken the adjuster untill the wheel is freed.Check the over run again. So yes, a normal mechanic can service the brakes i would think.
Try to read up as much as you can Jon, there is lots of information in caravan magazines and on this and other caravan forums.
The most important thing is that when you take the plunge and go on that first trip dont overload your caravan or towcar, and distribute any weight properly. (no heavy items in top cupboards and anything that you carry place over the axle)
It might be an idea to find a place to try out your caravan not too far away from home so that if you find anything wrong or forget something(everybody does) then its not a disaster.
The most important thing above all else is to enjoy yourself. Regards, Steve