billytheghillie Posted July 11, 2022 Report Share Posted July 11, 2022 I plan to get a 12x8 garden shed. Going to erect it on pavement slabs 2x2. Do i need to put down a weed control membrane? If so what layer does it go in i.e. sand 1st, then membrane, then slabs. Many Thanks. Quote Link to comment Share on other sites More sharing options...
Ultrastu Posted July 11, 2022 Report Share Posted July 11, 2022 Are you going to have a wooden floor above the slabs ? If so, make sure there is good air flow between the slabs and under side of the joists and flooring deck .its vital to stop the floor rotting out. Quote Link to comment Share on other sites More sharing options...
billytheghillie Posted July 11, 2022 Author Report Share Posted July 11, 2022 9 minutes ago, Ultrastu said: Are you going to have a wooden floor above the slabs ? If so, make sure there is good air flow between the slabs and under side of the joists and flooring deck .its vital to stop the floor rotting out. just the wooden floor that comes with it. Quote Link to comment Share on other sites More sharing options...
old'un Posted July 11, 2022 Report Share Posted July 11, 2022 had a new 10x8 shed about two years ago, never put any membrane down, not had one weed under shed, think its a bit dark for them to survive, any that do show around the edges are treated with round-up. Quote Link to comment Share on other sites More sharing options...
loriusgarrulus Posted July 11, 2022 Report Share Posted July 11, 2022 Our sheds are raised up on breeze blocks to allow air flow and the terrier underneath. Keeps the shed floor dry and discourages rats. Quote Link to comment Share on other sites More sharing options...
billytheghillie Posted July 11, 2022 Author Report Share Posted July 11, 2022 Next Question, where is the best place to buy from? Also shiplap or tongue and groove. Many Thanks. Quote Link to comment Share on other sites More sharing options...
old'un Posted July 11, 2022 Report Share Posted July 11, 2022 (edited) 20 minutes ago, billytheghillie said: Next Question, where is the best place to buy from? Also shiplap or tongue and groove. Many Thanks. 18/20mm pressure treated tongue and groove. even though my shed is on a base and the 2.5" x 2" floor joists are pressure treated and have good ventilation I expect they will eventually start to rot but hopefully after I have gone. try to source locally from recommendations. if it comes pressure treated it will be wet, let it dry out and give two or three coats inside and out with this, I can highley recommend it, on a shed that size you may need 4 cans....https://www.screwfix.com/p/no-nonsense-water-repellent-seal-clear-5ltr/57474?tc=QA8&ds_kid=92700065972061613&ds_rl=1249407&ds_rl=1241687&ds_rl=1245250&ds_rl=1245250&gclid=EAIaIQobChMI5a2D4Z_x-AIVyuvtCh0X-A7tEAQYASABEgLeO_D_BwE&gclsrc=aw.ds Edited July 11, 2022 by old'un Quote Link to comment Share on other sites More sharing options...
Ultrastu Posted July 11, 2022 Report Share Posted July 11, 2022 So if it comes with a joist and board floor . Don't bother with the slabs .put a small trench in the ground maybe 4 inches deep and 8 inches wide .and half fill with stone and tamp down then lay a course or 2 of bricks on the stone (foundation ) All around the perimeter of the shed and one through the middle to support the joists at the mid point leave a few gaps front and rear to let the air through .lay some weed mat on the grass inside your walls (don't forget to weed kill it first .)And then plink your shed on top .stepping up into the shed door . Quote Link to comment Share on other sites More sharing options...
Scully Posted July 11, 2022 Report Share Posted July 11, 2022 Will anything grow if it gets no light? I built a shed on railway sleepers and nothing of any consequence grows underneath. Quote Link to comment Share on other sites More sharing options...
old'un Posted July 11, 2022 Report Share Posted July 11, 2022 5 minutes ago, Scully said: Will anything grow if it gets no light? I built a shed on railway sleepers and nothing of any consequence grows underneath. rhubarb Quote Link to comment Share on other sites More sharing options...
Ultrastu Posted July 11, 2022 Report Share Posted July 11, 2022 Bean sprouts and mushrooms perhaps . Other than that dark will stop everything Quote Link to comment Share on other sites More sharing options...
old'un Posted July 11, 2022 Report Share Posted July 11, 2022 4 minutes ago, Ultrastu said: Bean sprouts and mushrooms perhaps . Other than that dark will stop everything now there's a thought, all I need now is some chicken and I have got a stir fry. Quote Link to comment Share on other sites More sharing options...
derbyduck Posted July 11, 2022 Report Share Posted July 11, 2022 Billy I've a shed on my allotment and it is built on a bed of black plastic pallets , when I took it over I but my spirt level on it and it was plum, level and square , I was told it was built 12yrs previous and I've had it 5yrs still good, have a look on FB marketplace ,they are for nowt ! Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted July 11, 2022 Report Share Posted July 11, 2022 Hello, do you already have the paving slabs ? T and G will always work out better for long term use, A concrete base will always be the best but if you have the slabs it should be pretty straight forward to lay a 12x8 eg 24, then put riser joists on slabs for air gap and treat joists and bottom of floor again, if you have a gap between sides and floor you can put another length of timber on joist to stop floor bounce, let it settle and give another coat of weather proofer, this forced weather proofing timber I never found good so another coat or 2 will last many years, Quote Link to comment Share on other sites More sharing options...
Walker570 Posted July 11, 2022 Report Share Posted July 11, 2022 1 hour ago, loriusgarrulus said: Our sheds are raised up on breeze blocks to allow air flow and the terrier underneath. Keeps the shed floor dry and discourages rats. This. ....... and the terriers as well Quote Link to comment Share on other sites More sharing options...
billytheghillie Posted July 11, 2022 Author Report Share Posted July 11, 2022 7 minutes ago, oldypigeonpopper said: Hello, do you already have the paving slabs ? T and G will always work out better for long term use, A concrete base will always be the best but if you have the slabs it should be pretty straight forward to lay a 12x8 eg 24, then put riser joists on slabs for air gap and treat joists and bottom of floor again, if you have a gap between sides and floor you can put another length of timber on joist to stop floor bounce, let it settle and give another coat of weather proofer, this forced weather proofing timber I never found good so another coat or 2 will last many years, I already have 12 slabs so need 18 more, place near me does 2nd hand ones. Did think about concrete but to pricey compared with slabs. Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted July 11, 2022 Report Share Posted July 11, 2022 1 hour ago, billytheghillie said: I already have 12 slabs so need 18 more, place near me does 2nd hand ones. Did think about concrete but to pricey compared with slabs. Ok that's xtra for door area, 👍 Quote Link to comment Share on other sites More sharing options...
billytheghillie Posted July 11, 2022 Author Report Share Posted July 11, 2022 Please be patient with me as i am a auld codger, Have i got this right, 1. lay slabs for level base 2. use joist levelers ( can i use CLS timer for frame ) 3. lay shed floor. Plan to store my ride on mower in shed, will this bear the weight? Many Thanks. Quote Link to comment Share on other sites More sharing options...
Scully Posted July 11, 2022 Report Share Posted July 11, 2022 3 hours ago, old'un said: rhubarb That’s true! Forced rhubarb is supposed to be very sweet! Quote Link to comment Share on other sites More sharing options...
B725 Posted July 11, 2022 Report Share Posted July 11, 2022 I put my 20 foot shed on something similar to this, it came with weed barrier and I filled them with pea gravel this way the wooden floor never has any standing water underneath Quote Link to comment Share on other sites More sharing options...
Bigbob Posted July 12, 2022 Report Share Posted July 12, 2022 I do the same as above a base of slabs then up a foot of the ground on bricks to let the air threw and stop any vermin . But i remember all my dads hen hutches he just had them raised off the ground on bricks and no weeds grew under then as it was so dry underneath them Quote Link to comment Share on other sites More sharing options...
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