Mike Wye & Associates Ltd
Suppliers of Natural Building and Decorating Products
sales@mikewye.co.uk

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Natural Building Products and Prices Index
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For orders & advice please telephone 01409-281644

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Please click on the links in the index below for prices and information.

Insulation & Boards
Cellulose InsulationHemp Insulation Pavafloor
Clay Board Isolair Sarking Board Pavatherm Board
External Insulation BoardPavadentro wall insulationSheepswool
LECAPavatherm Floor NKStrawboard
  Reed Board
Plasters & Lath
Claytec PlastersClaytec Undercoat
Claytec TopcoatLath  
Various
Cob Blocks & Cob BricksOak LintelsSilver Mica 175
Glass Fibre MeshPavatex Self-Seal Tape Possible Grants

Ecological Building. Concern is growing over the environmental impact of many modern products. There is now an awareness of issues such as tropical deforestation and 'Sick Building Syndrome'. Concern about indoor pollution and allergies is particularly high. In terms of energy and toxicity, buildings and construction are amongst the most wasteful and polluting areas of modern life. This situation can be changed and Natural Building Products are part of the solution.
Earth Products. These are suitable for historic building repairs and for new building applications. They are extremely low energy materials, from sustainable resources and are entirely healthy. They are eminently suitable for "breathing" constructions. Earth products are easy and pleasant to use and are capable of creating a stunning appearance. They are durable and easily maintained.
Insulation Products. These are suitable for all types of buildings, but particularly for breathing constructions where control of moisture is necessary. For this reason they are indispensable in the renovation of historic buildings.

Clay Board
Made of clay, reed and hessian. It is a practical alternative to plasterboard or lath and plaster and is compatible with clay or lime plasters. Clay products help to regulate temperature and moisture and provide acoustic insulation.Click here for technical sheet.

QUANTITY
PRICE
BD 20mm x 1500 x 625
£28.03
BD 25mm x 1500 x 625
£31.98

Claytec Plasters - General
These are a blend of clay, fine aggregate and plant fibres. They are supplied as dry powders in bags or as "green" or wet mixes in 1 tonne or 1.2 tonne bags. They have an indefinite shelflife whilst dry and are mixed with clean water for use. They harden by drying and, as no chemical reaction takes place, they remain workable for a lengthy period and can be re-worked by the addition of water. They can be used internally on masonry, clayboards, lime plasters and plasterboard and offer a practical alternative to gypsum plasters. The self-coloured plasters provide a high quality non-dusting surface without the need for further decoration.

Clay plaster Topcoat
Click here for Claytec technical sheet.

QUANTITY
PRICE
Claytec top coat 30kg
£26.79

Claytec Undercoat
Click here for technical sheet.

QUANTITY
PRICE
30kg
£20.00
1200kg Wet
£331.83

Wemico R131 Glass Fibre Mesh
for reinforcing plasters.

QUANTITY
PRICE
50m x 1m Roll
£70.86

LECA
Light Expanded Clay Aggregate is ideal for use as an insulating sub-base beneath ground floors or as a light weight aggregate in slabs. It consists of lightweight, porous, ceramic granules formed by expanding special clays at high temperatures. In bulk, the coated version of LECA is free-draining and has negative capillary action, good load-bearing properties and good thermal qualities (k = 0.11 w/mk).
Click here for technical sheet.

 50 litre bags1.2 cu. metre bags
  PRICEWEIGHT as guide onlyPRICE
Weight as guide only
LECA Mix 0 - 4mm
£7.7024 kg£96.15
570 kg
LECA Mix 4 - 10mm
£7.7021 kg£87.30
500 kg
LECA Mix 10 - 20mm
£7.7020 kg£87.30
480 kg
Coated LECA 10 - 20mm
£8.1020 kg£89.20
480 kg

Bulk discounts are available for full pallets of 50 litre bags (21 bags / pallet) or 10+ bags of the 1.2 cu.m size. All prices are plus carriage, although the 50 litre bags are available ex-works.

Sheepswool

Sheepswool Insulation
Click to view larger image
Sheepswool Insulation
Click to view larger image

Produced in the UK, sheepswool batts natural insulation come in a range of sizes. They are sustainable, safe and have a high insulation valve (k = 0.039 w/mk) and excellent moisture control without loss of thermal efficiency. They have low embodied energy and are not toxic or irritating in use. Cost per m2 at 100mm is about £9.50 plus carriage.
Click here for technical sheet.


If you would like help choosing between Thermafleece and PB20 please see the following comparison chart

 

BATT DIMENSIONS
BATT m²
BATTS per PACK
PACK m²
INDIVIDUAL
£ / BATT
m³ PACK
50 x 400 x 1200
0.48
42
20.16
£3.50
£95.96
50 x 600 x 1200
0.72
28
20.16
£5.25
£95.96
75 x 400 x 1200
0.48
27
12.96
£5.25
£92.28
75 x 600 x 1200
0.72
18
12.96
£7.86
£92.28
100 x 400 x 1200
0.48
21
10.08
£6.88
£95.76
100 x 600 x 1200
0.72
14
10.08
£10.32
£95.76

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Sheepswool - PB20


Thermafleece PB20 is a wool-based building insulation incorporating a recycled polyester bulking agent to enable the insulation to be rolled and compressed by up to 60% whilst retaining many of the functional and environmental benefits associated with wool fibres. PB20 has a thermal conductivity of 0.042 W/mK, which is compariable with most equivalent conventional insulation. Cost per m2 at 100mm is about £7.70 plus carriage.

Click here for the brochure

BATT DIMENSIONS
UNITS per PACK
PACK m²
PRICE per m2
PRICE per PACK
100 x 370 x 5300
3
5.88
£7.70
£45.28
100 x 570 x 5300
2
6.04
£7.70
£46.51
70 x 570 x 7600
2
8.66
£5.39
£46.68

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Cellulose insulation
Excel Warmcell 100 loose-fill cellulose fibre natural insulation is produced from 100% recycled paper and has a high insulation value (k = 0.035 w/mk). It is non-toxic, non-irritant and extremely easy to use. Our cellulose insulation has been treated with inorganic salts to provide pest and fire resistance. It is specifically for use between joists in lofts and under suspended floors. Cost per m2 at 100mm is about £5.06 plus carriage.
Click here for Cellulose Fibre technical sheet.

QUANTITY
PRICE / BAG
Cost per m³
8kg
£11.00
circa £50.60


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Hemp Insulation
Hemp insulation is a natural fibre insulation material made from hemp fibres. It is thermally effecient having a thermal resistance of 0.040Wm/K. Manufactured from Hemp, this product offers a good environmentally friendly option. Sold in batts, the cubic metre rate equates to approximately £12.50
cost per m2 at 100mm is about £8.43 plus carriage.

Click here for Hemp Fibre information sheet

Product
Thickness (mm)
Widths (mm)
Lengths (MM)
Packing
Coverage
Price per pack
Batts 50 385 1,200 12 / pack5.5m2 £38.59
Batts 50 575 1,200 12 / pack8.3m2 £57.63
Batts753851,2008/pack3.7m2£37.07
Batts755751,2008/pack5.5m2£55.37
Batts 100 385 1,200 6 / pack2.77m2 £33.52
Batts 100 575 1,200 6 / pack4.14m2

£50.06

Batts1403851,2004/ pack1.85m2£31.10
Batts 140 575 1,200 4/ pack2.76m2

£46.45

Wood Fibre Boards - General
Wood fibre boards are rigid building boards made from reprocessed offcuts with added formaldehyde.

Pavadentro Internal wall Board
Pavadentro 40mmPavadentro 40mm joint

Used to insulate the internal face of external walls. The board has a built in membrane layer to help prevent the build up of interstitial condensation.

Click here for technical leaflet

DIMENSIONS mm
PRICE per board
Eq. price per m2
40 x 1020 x 600 -100 boards/pallet
£10.69
£17.46
60 x 1020 x 600 - 68 boards/pallet
£13.56
£22.16
80 x 1020 x 600 - 48 boards/pallet
£18.24
£29.81
100 x 1020 x 600 -40 boards/pallet
£22.51
£36.78

 

Pavatherm Thermal Board
Used internally for thermal and acoustic natural insulation on floors walls and ceilings. Made from wood pulp, no adhesives are used in the manufacturing process.

DIMENSIONS mm
PRICE
20 x 1020 x 600
£3.32
30 x 1020 x 600
£4.84
40 x 1020 x 600
£6.46
60 x 1020 x 600
£9.65
80 x 1020 x 600
£13.01
90 x 1020 x 600
£15.10
100 x 1020 x 600
£16.79
80 x 2050 x 800
£34.29
40 x 2050 x 1200
£25.95
60 x 2050 x 1200
£38.73

Pavatherm Floor NK

DIMENSIONS mm
PRICE
40 x 1020 x 600
£8.41
60 x 1020 x 600
£12.62

Isolair Sarking Board

DIMENSIONS mm
PRICE
22 x 2500 x 770
£18.70
35 x 2500 x 770
£30.64
60 x 2500 x 770
£51.98

External Insulation Board - Unger diffutherm
These can be used against a solid background or over studs and joists when protected with a lime or earth plaster.

DIMENSIONS mm
PRICE
60 x 1300 x 790
£23.06
80 x 1300 x 790
£30.82
100 x 1300 x 790
£38.14

Pavatex Self-Seal Tape

DIMENSIONS
PRICE
Roll - 15cm x 15m
£62.71

Reed Board

Reedboard
Click to view larger image

Click here for technical sheet

20 mm
1000 x 2000 mm
£21.18
25 mm 1000 x 2000 mm£15.50
50 mm
1000 x 2000 cm
£35.82


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Strawboard Click here for brochure1 brochure2 Environmental Spec.
Designed to offer a viable alternative to plasterboard - which has now been redefined as a potentially hazardous material - Invotek Strawboard is derived from a sustainable source and is both biodegradable and easily recycled.

Non-loadbearing breathable boards with no off-gasing
of formaldahyde. Similar in appearance to chipboard. Can be used in environmentlly friendly newbuild or renovation work on traditional buildings. Lime rich skimming plaster such as our 3/2 plaster or Kreidezeit limewall finish smooth or fine can be applied onto a DG27 base or painted with Kreidezeit Stand Oil paint.

12mm
8ft x 4ft
£26.00
12mm
4ft x 2ft
£8.00
18mm
8ft x 4ft
£36.00
18mm
4ft x 2ft
£12.00

 

Stabilising Mat / Reed Roll - Temp out of stock

Stabilising Mat
Click to view larger image

Reed / lath alternative Click here for technical sheet

10cm
200 x 500cm
£35.24

Glass fibre scrim
For reinforcing plasters.

QUANTITY
PRICE
ROLL -100m x 8cm
£16.53

Silver Mica 175

QUANTITY
PRICE
25kg
£262.50

Cob Blocks and Cob Bricks

Cob Block Compressed
Click to view larger image
Cob Block Extruded
Click to view larger image
Cob Brick Compressed
Click to view larger image

These are suitable for the repair and rebuilding of earth buildings. We supply two types - compressed and extruded. The compressed cob blocks more closely match the original composition of the sub-soil used for cob buildings, the extruded cob blocks are slightly smaller and a bit cheaper!
Coverage - a cubic metre of wall rebuild will require 80 cob blocks 18" x 9" x 4"
Bedding mortar - a tonne of 4/1 lime mortar will bed around 160 cob blocks.

TYPE
NOMINAL SIZE
PALLETTED PRICE
collected from us
INDIVIDUAL PRICE
per block
Extruded cob block
17.5" x 8.5" x 4"
£1.45 in pallets of 50
£1.50
Compressed cob block
17.5" x 9" x 4"
£1.80 in pallets of 50
£1.90
Compressed cob brick
8" x 4" x 2.5"
-
85p

Oak Lintels
We stock are wide range of seasoned oak lintels that have been air dried for up to 8 years. Standard sizes are 4" x3", 6" x 4", 8" x 5" and 12" x 5" in a variety of lengths up to 7ft. We can also supply green oak cut to your specific requirements.
Formula to calculate volume:- (inches x inches) x length (feet) / 144 = volume in cu. ft

QUANTITY
STANDARD PRICE
per cubic foot
£30.00

Riven and Sawn Lath

Stabilising Mat
Click to view larger image

We stock over 100,000 feet of lath and battens. Riven/hand split lath is cut with the grain and is less flexible than sawn lath and offers a coarser surface for lime plasters to adhere to, making it more suitable for ceiling repairs. The key to the riven surface is then an additional grip to that formed by squeezing the lime plaster through the gaps between the laths. Riven Chestnut lath is a little more flexible than riven oak lath and can therefore be used for following contours or undulations a little better if needed.

Sawn larch lath is a good quality wood that is the most flexible, particularly useful for longer lengths that need to follow old walls that have 'charactor'.

 
RIVEN
OAK
RIVEN
CHESTNUT
SAWN
OAK
SAWN
LARCH
price, per foot
27p
27p
10p
7p

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