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Hi I do hope that someone can help I have a 1999 conway crusader which needs waterproofing, what is the best thing to use and how much will I need?

Thanks Jo

hi and welcome

as said above,if the unit has never been waterproofed,then it should not need doing,if it has been done before then yes you have to carry on doing it.as to which?well they all do the job,but if yours has been done with a silicone based waterproofer then you have to use silicone based stuff again,as the water based won't take hold.

Hi Jo welcome to the forum - you have come to the right place for advice

You can't tell if canvas has been waterproofed. Untreated canvas works by the cotton fibres swelling when they get wet so that the water can't penetrate. Waterproofing works by a layer of silicon (or similar) sitting on top of the fabric to prevent the water seeping through.

The best thing you can do is pitch it and then wait for it to rain or get a gentle hosepipe on it to get any surface dirt off it. Any stubborn marks try and remove with a soft brush. Just use water no detergents. You will also find any areas where it might be leaking.

If it doesn't leak it won't need waterproofing (well cared for canvas can last for 30 odd years without being treated).

If it does leak then invest in a large tin of Fabsil or similar (£20 ish ) and one of the pump action sprayers (£10-£20 from a garden centre) much easier than using a brush. 

Once it's been waterproofed you will have to re-do it every 2-3 years    

Hve you tried it up and saturate the awning with a hose, as if it just needs closing together to be waterproof it will do so itself. Soak it once, check underneath if the water is coming through like rain. If it is a very fine mist but not much, let it dry off. The hose it again, you may find it has closed all up and is now waterproof so does not need touching. If it leaks though like the hose is just pouring the water inside then it will need re-proving. Which would be a shame to do without checking first to see if it really needs it. Some on here have not reproofed their units after 20 years of use. Because of what they are made of.

Check first with hose.Someone will surely say more to help as a search box  in the above search for proofing as it has been spoken of before

I knew I would cross with another that says tthe same

Just did a search in the above.

re-proof  then trailer tents fc etc  the first one is saying the same