Ask The Trades - Print Page

Ask The Trades
https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Carpentry Questions >> all year timber summer house https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1188294048 Message started by urbantus on Aug 28^th, 2007, 10:40am

Title: all year timber summer house
Post by urbantus on Aug 28^th, 2007, 10:40am

Hi Im building a timber summer house in my garden for all year use

just about to build the walls

from the outside in

does this sound ok

12mm treated shiplap
knauf breathline membrane
12mm sterling board
100x50 mm studs with 100 mm rockwool insulation
vapour barrier
plasterboard

would you reccommend battens between the knauf breathline membrane and the ship lap or is this over kill

it seems quite a high spec but i want it to be an all year summer house
plus i want it to last

I would also be interested on how to insulate the roof

This will be
two layers roofinf felt
18 mm ply
125x47 mm rafters
insulation
vapour barrier
foil backed plaster board

is this ok
do i need a gap for air flow

Im running 4 sleeper walls along long side

The joists will span front to back
ie 3600 mm long but supported at front and back plus in tow places in the middle

max span therefore 1200 mm

Are 150x47 mm joists too big

Im going to fit 18 mm ply on top
plus polystyrene insulation within joists

Im running the rafters front to back
ie 3600 mm span
I want to run a single purlin in the middle 4800 mm long

ie rafter span now 1800 mm

what size rafters and purlin for this roof

its going to be clad with 18 mm ply and two layers roofing felt

thx

urbantus

Title: Re: all year timber summer house
Post by Badger on Aug 28^th, 2007, 11:49am

it sounds very nice, hope you have loads of pessa (money) to pay for it as it will probably cost you a fotune

Title: Re: all year timber summer house
Post by big_all on Aug 28^th, 2007, 1:46pm

you definatly need airflow behind the cladding as trapped water will cause rot eventualy

my small workshop is of simmilar structure 12mm txg cladding 3x2" timber 12mm ext ply floor and roof havent got round to the insulation yet though ;D ;)

its 12 x10ft internal size
what size is yours!!!!

http://i21.photobucket.com/albums/b270/bigall2005/workshop001.jpg

http://i21.photobucket.com/albums/b270/bigall2005/workshop003.jpg

Title: Re: all year timber summer house
Post by Badger on Aug 28^th, 2007, 4:15pm

big_all wrote on Aug 28^th, 2007, 1:46pm:

what size is yours!!!!

mines about 12inches last time i checked. ;D
Those lectrics look a bit dodgy BA. Who did them for you? Was they part P NICEIC registered? and did they certify you sorry it ;D

Title: Re: all year timber summer house
Post by big_all on Aug 28^th, 2007, 4:47pm

wrote on Aug 28^th, 2007, 4:15pm:

big_all wrote on Aug 28^th, 2007, 1:46pm:

what size is yours!!!!

mines about 12inches last time i checked. ;D
Those lectrics look a bit dodgy BA. Who did them for you? Was they part P NICEIC registered? and did they certify you sorry it ;D

heeelloo bodger

i am assuming you mean the grey cable comming from the socket down behind the chop saw handle and back up again!!!

all my sockets are high level the area below the "cable" is the work area
so instead if the cable trailing everywhere it goes from the socket to the work area via a hook above so the cable never gets in the way
so what you see is the excess lead too the sander keeping out the way ;)

Title: Re: all year timber summer house
Post by WOLF on Aug 28^th, 2007, 5:03pm

Quote:

Was they part P NICEIC registered?

no they were proper sparkies.. not gov lapdogs!!!! ;D ;D ;D ;D ;D