Marr Construction
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25 square metre house  : Planning Permission may to required    Budget price 75,000 including vat
Picture
SEE BELOW FOR INTERIOR IMAGES.


SPECIFICATION

WALLS

from outside to inside:

larch cladding 

timber  battens vertical for cavity air space.

solitex breather membrane to outside of timber frame

diffusion open green board outside face of external walls

90 mm rockwool frame slab 2 layers

timber studs  175x44

0sb3 18mm on inside

70 mm HD rockwool

base coat, mesh top coat finish plaster

Wall  u value
0.15W/m sq K

addition of composite cladding will increase cost by 65%.

ROOF
Solar PV panels are an additional cost as pictured : Please enquire .

from outside to inside:

Trocal heat welded membrane  roof finish to low pitch roof.

Tegral metal roof to pitched roofs.

50x50 batten space with ventilation

sarking ridgid polyuruthane insulation  70 mm

 full fill cellulose woodfibre insulation in Rafters

Rafters 225mm

Intello membrane to ceiling & taping of joints & junctions to wall.

service cavity on inside of taped intello.

Red deal panelling to ceilings

Roof u value
0.11W/m sq K

Floor

from outside to inside:

 floor joist panels

OSB to underside of floor joists

Cellulose blown insulation or Rockwool

OSB to top of floor joists

Birch  20 mm solid tg prefinished  flooring

Floor u value
0.15W/m sq K
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