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Posted by Smitty Two on October 22, 2008, 1:28 pm
> I recently installed a yardmaster metal shed in the garden. After a good
> shower of rain the inside has huge wet patches on the concrete floor.
>
> The sheds on a cement base with the top three or four inches being a mix of
> one cement to four sharp sand and under that top layer, it's a mix of one
> cement to three sharp sand and three Wickes ballast (gravel).
>
> I have put a bead of *clear* silicone around the metal frame base of the
> shed, but its obviouslly not enough to stop the problem. The Yardmaster
> technical advice staff have advised using Shell Tixophalte 'seal and fix'
> flexible bitumen sealer. I cannot get this in any local shops and a web
> search usually reveals wholesalers who are mainly selling to the trade, and
> it also looks to be expensive stuff to buy.
>
> This link posted to the tinypic website will show the photo I took of the
> outside edge of the shed
>
> http://tinypic.com/view.php?pic=27yok29&s=4
>
> This picture below is on the inside and shows the metal frame base.
>
> http://tinypic.com/view.php?pic=28vrkpj&s=4
>
> Would anyone advise a novice on; Would lashings of the clear silicone
> sealant I have already bought be more or less as good to use as a bitumen
> sealent? I would prefer to use a clear silicone since masses of a black non
> setting bitumen would not look so good smeared all around the base. but if
> bitumen is best then i guess i can pick up some at Wickes, rather than use
> the Shell product?
>
> Another aspect of this wet floor problem is that on the side of the shed
> (where this photo was taken) the edge of the cement base is only three or
> four inches from the shed base. But on the opposite two sides the width of
> the cement base is about 18 inches one side and about 20 inches on the
> other. My thoughts are, is the cement porous like blotting paper? thus
> soaking up a lot of water on these larger flat areas and transferring it
> inside the shed? If the cement base is in fact behaving like this, then i'm
> guessing i would
> have to seal the whole width of the base area around the shed.
>
> Since i'm using this outside flat space for storing ladders etc, i would not
> want to have to
> walk on a 'non setting' type sealant or i guess even a silicone sealant. If
> this blotting paper type activity is likely to be 'for real', what might be
> a way to seal this part of the base please? Grateful for any other advice
> on this problem,
> thanks.
Only built one metal shed, 12' x 24', and haven't really looked at the
construction of others. But on that one the walls are designed to hang
about 2" down below the level of the 4" thick pad. Seems either you
built yours wrong, starting with an oversize pad, or it's a shitty
design.
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> shower of rain the inside has huge wet patches on the concrete floor.
>
> The sheds on a cement base with the top three or four inches being a mix of
> one cement to four sharp sand and under that top layer, it's a mix of one
> cement to three sharp sand and three Wickes ballast (gravel).
>
> I have put a bead of *clear* silicone around the metal frame base of the
> shed, but its obviouslly not enough to stop the problem. The Yardmaster
> technical advice staff have advised using Shell Tixophalte 'seal and fix'
> flexible bitumen sealer. I cannot get this in any local shops and a web
> search usually reveals wholesalers who are mainly selling to the trade, and
> it also looks to be expensive stuff to buy.
>
> This link posted to the tinypic website will show the photo I took of the
> outside edge of the shed
>
> http://tinypic.com/view.php?pic=27yok29&s=4
>
> This picture below is on the inside and shows the metal frame base.
>
> http://tinypic.com/view.php?pic=28vrkpj&s=4
>
> Would anyone advise a novice on; Would lashings of the clear silicone
> sealant I have already bought be more or less as good to use as a bitumen
> sealent? I would prefer to use a clear silicone since masses of a black non
> setting bitumen would not look so good smeared all around the base. but if
> bitumen is best then i guess i can pick up some at Wickes, rather than use
> the Shell product?
>
> Another aspect of this wet floor problem is that on the side of the shed
> (where this photo was taken) the edge of the cement base is only three or
> four inches from the shed base. But on the opposite two sides the width of
> the cement base is about 18 inches one side and about 20 inches on the
> other. My thoughts are, is the cement porous like blotting paper? thus
> soaking up a lot of water on these larger flat areas and transferring it
> inside the shed? If the cement base is in fact behaving like this, then i'm
> guessing i would
> have to seal the whole width of the base area around the shed.
>
> Since i'm using this outside flat space for storing ladders etc, i would not
> want to have to
> walk on a 'non setting' type sealant or i guess even a silicone sealant. If
> this blotting paper type activity is likely to be 'for real', what might be
> a way to seal this part of the base please? Grateful for any other advice
> on this problem,
> thanks.