PERIMATE DI-A

PERIMATE™ DI-A is the STYROFOAM™ solution for insulating structure below ground. PERIMATE DI-A boards have vertical channels cut into one face, to drain water away, and a filter fabric bonded to the face to prevent soil particles blocking the channels.

The letter 'A' denotes Dow's environmentally advanced quality of blue extruded polystyrene insulation foams, which are blown with carbon dioxide. 'A' products have no impact on the ozone layer.

Further information on designing with PERIMATE DI-A insulation can be found at Insulating with STYROFOAM: structure below ground.

Safety Data Sheets

				PERIMATE DI-A
Properties	Standard	Unit	CE Code
Thermal conductivity*
≤80mm	BS EN 12667	W/mK	λD	0.035
81-120mm	BS EN 12667	W/mK	λD	0.036
>120mm	BS EN 12667	W/mK	λD	–
Compressive strength at 10% or break (90 days)	BS EN 826	kN/m²	CS(10Y)i	300
Design load
2% maximum deflection (50 years)	BS EN 1606	kN/m²	CC(2/1.5/50)σ_C	–
Water vapour resistivity	BS EN 12086	MNs/gm	–	825
Water vapour diffusion resistance factor	BS EN 12086	m	MUi	165
Water absorption
Total immersion	BS EN 12087	% vol	WL(T)i	<0.5
Diffusion	BS EN 12088	% vol	WL(V)i	<3
Freeze/thaw, after 300 cycles	BS EN12091	% vol	FTi	<1
Dimensional stability
48hrs at 70C/90%RH	BS EN 1604	%	DS(TH)	<2
168hrs at 40kPa/70C		%	DLT(2)5	–
Density (aim)	BS EN 1602	kg/m³	–	45
Dimensions
Length	BS EN 822	mm	–	1250
Width	BS EN 822	mm	–	600
Thickness	BS EN 823	mm	Ti	60, 100, 120
Fire classification	BS EN 13164	–	Euroclass	E
Appearance
Surface				grooved face with geotextile
Edge profile				shiplap
Application				basement walls, external

The properties given are typical (unless stated otherwise). Results of tests described are available from Dow

* declared 90/90 value - BS EN 13164

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