Questions On 1st Self Build Shed

by Ray Bennett
(Surrey)

Hi John, Now retired at 70. My plan is to build my first good size shed, 16ftX8. I have all the framework timber (tanalised 4x2 roof and floorboard half inch ply8x4)


Am I correct in thinking 12" on centre for the floor and 20" on centre for walls and roof is this nailed or screwed?) will be ok?

Breathable fabric on outside of framing then I have 6" tanalised featheredge (do I nail or screw this for best fitting?).

The door will be a sheet of the ply covered with featheredge and 6"x3" window with wired glass and finally a pent roof with 8" slope from front to back.

Roof to be covered with heavy duty gritted felt.

Any and all advice would be very gratefully received.

Thanks

Ray

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Great project for a first build!
by: John

Hi Ray, Thanks for your email and that sounds a good size for a shed. Is it going to be for a workshop?

With regards to the plywood. I would use ¾" ply for the floor and ½"ply for the walls and roof. With those materials, you would have the joists, studs and rafters at 16" centres. Using ½" ply for the floor even with joists at 12" centres wouldn’t feel as solid.

When fixing the featheredge use galvanised nails. Depending on how dry the wood is, it might be worth pre-drilling the holes to stop it splitting.

Are you sheathing the wall with ply first then using a breathable membrane with the featheredge on battens on the outside of the membrane? Or nailing the feather edge direct to the timber frame, with the membrane between? See here for what I mean on shed walls.

With regards to the roof, felt will be fine, but will need re-doing in about 7 years time. If you use a good quality rubber roofing membrane then it will likely last 40+ years. Bit more expensive up-front but less maintenance and repairs.

I have some shed plans for sale on the site which would give you some guidance. But they are for a gable shed, more are in the pipeline.

Feel free to ask me any more questions you want. Looking forward to hearing more as your project progresses.

Regards

John

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