Garden & Landscaping
241 sources in the library on garden & landscaping. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 6 of 7.
- fair RN-QT0V7Z
Royal Horticultural Society
RHS method and timings for a turf lawn. Turf is best laid in mid-autumn and can go down any time from mid-autumn to early spring when the soil is neither waterlogged nor frozen; mid-spring to early autumn should be avoided because the turf struggles to root in heat and needs constant watering. Preparation is the whole job: dig or rotovate to 20 to 25cm depth, work in well-rotted organic matter, fork out perennial weed roots such as couch grass and bindweed, level, and let the ground settle for several weeks before laying. Turf should be laid within 24 hours of delivery; if laying is delayed more than a couple of days, unroll it flat so the grass gets light and water it if dry, or it will yellow and die. Lay with joints staggered like brickwork, butted tight with no gaps, working from boards so the new turf is not trodden. Brush a lawn dressing into the joints. In dry weather water every 5 to 10 days in mid to late summer and about every fortnight at other times, wetting right through the turf so roots grow down. First mow about three weeks after laying, blades set high, once a tug on the grass shows it has rooted; keep off it until then.
- fair RN-BMZK2V
Royal Horticultural Society
RHS practical planting spec, the horticultural counterpart to BS 8545. Dig the hole the same depth as the rootball but three times as wide - depth is the common mistake, width is what matters. Set the tree so the point where the roots meet the trunk (the root flare) is level with the soil surface; planting proud or deep is the main cause of establishment failure. Firm the backfill to remove air pockets. Mulch with organic matter 5 to 8cm (2 to 3in) deep, leaving a 10cm (4in) mulch-free gap around the trunk base so the bark does not rot. Where staking is needed, drive the stake in at 45 degrees and keep it for two to three years, checking and gradually loosening the tie each year. Water regularly for at least a year or two, especially in dry spells. Autumn to spring is the best planting window, provided the ground is not waterlogged or frozen; containerised trees planted outside that window need noticeably more aftercare.
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Royal Horticultural Society
RHS specification for staking, which decides whether a new tree roots or rocks loose. The stake must go at least 40cm (16in) into the soil. The tie sits low, 40 to 50cm above ground or roughly one third of the tree's height, so the top of the trunk can still flex and thicken. A single angled stake goes in at 45 degrees with the rounded end facing into the prevailing wind. Use ties with spacers - rubber or plastic for durability, hessian where a biodegradable tie is wanted - and knot the tie or fit a rubber spacer so the trunk cannot chafe against the stake. Most trees need staking for between eighteen months and three years; semi-mature specimens may need longer. Remove a young stake by rocking it out by hand; saw an older one off at ground level rather than pulling it and tearing established roots. For larger trees, guying uses tensioned wires to angled stakes ringing the tree with rubber hose buffers, and underground ground anchors secure the rootball by buried wire loops - dearer, but invisible in an ornamental garden.
- fair RN-GMG4GM
Royal Horticultural Society
Identification, spread and disposal of Japanese knotweed on a renovation site. Stems are bamboo like with reddish purple speckling, conspicuous nodes and hollow centres, usually reaching about 2m (6 and a half feet) by late summer; leaves are spade shaped with flat bases, about 14cm (5 and a half inches) long, set in a zig zag along the stem, with creamy white flower clusters in late summer and early autumn. Rhizomes are thick and woody with an orange layer under the dark brown skin, commonly extending 1m (3 and a third feet) or more down, and a fragment as small as 1cm can grow into a new plant, so digging and careless disposal are the main spread routes; rhizomes can lie dormant in soil for many years. It is listed on Schedule 9 Section 14 of the Wildlife and Countryside Act 1981, so planting or causing it to grow in the wild is an offence carrying fines and imprisonment, and it and any soil containing it are controlled waste under the Environmental Protection Act duty of care regulations, requiring the Environment Agency to be informed, a registered waste carrier, an authorised disposal site and waste transfer permits. On sale and purchase, its presence must be declared on the TA6 form and lenders typically require a professional eradication management plan with a transferable insurance backed guarantee, usually supplied by the seller before completion. Glyphosate based weedkiller is the practical chemical control for a home gardener.
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Royal Horticultural Society
The authority for the autumn lawn renovation sequence and the quantities a scarification note needs. September and October are the window for scarifying, aerating, top dressing and feeding. Scarify with a spring-tined rake worked vigorously in two directions to lift thatch, or hire powered equipment for larger areas. Aerate by spiking with a garden fork as deep as possible, ideally the full depth of the tines, spacing each set of holes 10 to 15cm (4 to 6in) apart, and repeat every two to three years for a standard lawn; use hollow tines on clay or waterlogged soil every three to four years. Apply top dressing at 2 to 3kg per square metre (4 to 7lb per 10 square feet), mixed as 3 parts sandy loam, 6 parts sharp sand and 1 part well-rotted compost or soil improver. Use a fertiliser formulated for autumn to encourage root development, usually about a handful per square metre, applied before rainfall. Biological control of leatherjackets goes on in early autumn.
- fair RN-DLC5SV
Royal Horticultural Society
The Royal Horticultural Society on mowing. It settles the mistake this sentence warns about: cutting too low scalps the lawn and leaves bare patches, which happens most easily on soft ground, on fast turns, and where the surface is uneven. It also says the cutting height should be changed through the year rather than left alone. The page does not give a height in millimetres, so the 25 to 40 mm range here is ordinary summer practice rather than an RHS figure.
- fair RN-HFR7AT
Royal Horticultural Society
RHS guidance on mulching, the cheapest single intervention in a planted garden and the one most often done at the wrong depth. Apply a minimum of 5cm (2in) and ideally 7.5cm (3in): thinner and weeds come through, thicker over a wet soil and it can starve roots of air. Best timing is mid to late spring and autumn, when the soil is moist and warm, and at any time for new plantings. Keep the material off the stems: mulch in direct contact with the stems of trees or specimen shrubs can soften the stem and leave it vulnerable to disease, which is the failure behind the common 'mulch volcano' around a new tree. Biodegradable options that also feed the soil include garden compost, wood chippings, processed conifer bark, leaf mould, well-rotted manure, straw (traditionally for strawberries) and seaweed. Non-biodegradable options, used for surface and weed suppression rather than fertility, include slate, shingle, pebbles, gravel, stone chippings and decorative aggregates. Read with the RHS soil types page and BS 3882 where topsoil is being imported.
- fair RN-YDWVU9
Royal Horticultural Society
The source for the grass seed rate a turf versus seed note should quote. Spring and autumn are the ideal times to repair a lawn, when the weather is damp and cool. Grass seed is scattered at the rate advised on the packet, usually about 15 to 25g per square metre (half to three quarters of an ounce per square yard). When lifting damaged turf, slice underneath it to a depth of about 5cm (2in). Water gently with a watering can fitted with a fine rose so the seed is not dislodged, and keep newly sown grass and newly laid turf watered regularly until well rooted, because both are vulnerable to drying out.
- fair RN-X2UXSX
Royal Horticultural Society
Defines the six garden soil types and gives the particle size boundaries used to classify them: clay less than 0.002mm, silt 0.002 to 0.05mm, sand 0.05 to 2mm, and stones larger than 2mm. Characterises the behaviour of each: clay soils are heavy, high in nutrients, wet and cold in winter and baked dry in summer; sandy soils are light, dry, warm, low in nutrients and often acidic. Useful for judging shrinkable clay, drainage and planting near a new extension or foundation.
- fair RN-MS68WP
Royal Horticultural Society
RHS method for a seeded lawn, the cheaper alternative to turf. Best sowing windows are early autumn and mid-spring; germination follows in seven to ten days. The sowing rate is on the packet and varies with the mixture, so it should be weighed out per square metre rather than scattered by eye. Three mixture types: general-purpose, a hard-wearing blend for heavy foot traffic; luxury or fine, dense and soft but slower growing and less tolerant of wear; and shady, formulated for light to medium shade. Soil preparation is the same discipline as for turf: dig or rotovate to about 20cm (8in) where the soil is compacted, clear perennial weeds, level and let it settle. After sowing, water every few days if needed, and protect with horticultural fleece weighted at the edges to keep birds off and hold moisture in. First cut when the seedlings are 5 to 7.5cm (2 to 3in) tall, taking off only about a third of the height. Keep heavy use off for roughly eight months - so from June onwards for an autumn sowing, or late autumn for a spring sowing.
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Scottish Water
Two separate distances that both bind a build near a water main, with published tables. Access Distance, the legally supported clearance kept in every direction so the main can be repaired, maintained or renewed, measured from the outside of the pipe, with no buildings, structures or development permitted inside it: up to 180mm internal diameter, 3m; over 180mm up to 14 inch/350mm, 4.5m; over 350mm up to 18 inch/450mm, 6m; over 450mm up to 24 inch/600mm, 8m; over 600mm, minimum 10m depending on site conditions. Those minima assume a pipe invert up to 2 metres deep and may increase with depth, difficult topography or a main deeper than 2m; in constrained urban situations NJUG guidelines apply in pavements for small diameter distribution mains, larger mains in constrained urban roads need a risk assessment and method statement, and strategic mains over 600mm need detailed design referencing the Washington Suburban Sanitary Commission Pipeline Design Manual. Stand-off Distance is separate: the minimum distance habited property should sit from the main so a burst does not damage it, based on the crater size at the main's operating pressure: 2 bar 2.5m, 4 bar 5.0m, 6 bar 7.5m, 8 bar 10m, 10 bar 12m, 12 bar 14.5m, 14 bar 17m, 16 bar 19.5m, 18 bar 22m. Stand-off distances may be increased where the main is high pressure or deeper than 2m to invert, or where the property is at increased flood or damage risk if the main fails.
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Thames Water
Surface water drainage is charged as part of the wastewater bill and covers rainwater running off the roof, driveway or garden into the public sewer. Where surface water instead goes to a soakaway or a nearby stream and the property is not connected to the public sewer for surface water, a rebate can be claimed. The homeowner test given is to follow where the gutters lead: if there is a manhole cover close by, the surface water probably drains into a sewer. The bill states whether a surface water drainage charge is being made or a rebate is already applied. A successful rebate can be backdated up to six years, even if the customer has lived at the property longer. Relevant to anyone fitting a soakaway, a permeable driveway or a rainwater harvesting system, because the drainage change can also reduce a standing charge.
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University of Sheffield
Modelled hydrological and microclimate results for retrofitting SuDS into an existing urban catchment on the River Don in Sheffield. Runoff for each scenario was modelled in MUSIC against four storms: a 30 year 60 minute design storm, a 100 year 60 minute design storm, the 04/10/2008 Sheffield storm at a 1.38 year return period, and the 13/06/2007 storm at a 15.97 year return period that preceded the June 2007 Sheffield floods. Findings: SuDS reduced both total runoff volume and peak flow rate from the site across the storms; the flood channel scenario gave greater flow reduction than the street-based scenario for almost all storms, cutting both total volume and attenuating the peak. Microclimate modelling in ENVI-met over a 12 hour summer day showed SuDS scenarios reduced local average air temperatures by up to 1C compared with the as-is case, including late in the day when the urban heat island is strongest, with evening relative humidity below 70 per cent at all sites. The practical caveat: the best-performing scenario needed a greater land area and could not be implemented incrementally, which is why SuDS have to be designed in early rather than added late.
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ACO Technologies
HexDrain B 125 is a polypropylene channel to BS EN 1433 Load Class B 125, for domestic drives and small private car parks. Overall channel depth 100 mm. Supplied with a corrosion resistant black composite HeelGuard grating using 8 mm slots, held by the Drainlock bar-less locking device with an anti-shunt feature. Accessories: 110 mm diameter vertical outlet connector part 11285, roddable foul air trap 110 mm part 11191, closing endcap part 11085 and sump part 11385 with silt bucket.
- supplier figure RN-K53NA0
ACO Technologies
HexDrain is a recycled polypropylene channel drain rated Load Class A 15 to BS EN 1433, suitable for pedestrian domestic use on paths, patios and cycleways. Overall channel depth 80 mm, which makes it the shallow option where dig depth is limited. Channels clip together and the range includes corner units, outlets, an accessory bag (part 19287) and a sump unit (part 19558). ACO state that fitting a B 125 grating to a HexDrain channel does not raise the system rating, which stays at A 15 because it is set by the channel body; HexDrain B 125 is the product for light vehicles.
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ACO Technologies
RainDrain is made from ACO high strength polymer concrete rather than plastic, and is rated up to Load Class A 15 for domestic use; RainDrain B 125 is the version for cars or frequent loading. Channels interlock. A Brickslot grating variant is available in B 125 for driveways where a slot rather than a visible grating is wanted. ACO note two-person handling for the polymer concrete bodies.
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BG Electrical (Luceco)
Manufacturer data for a weatherproof 13 amp double socket. The rating is IP66, weatherproof and dustproof, and the manufacturer states this rating applies with the plug in place and the cover closed, which is the qualification that matters: an outdoor socket in use with the lid propped open is not achieving IP66. This is the specification to check before running a garden circuit.
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Brett Martin
PVC-U underground drainage from 110 mm to 400 mm diameter, made to BS EN 1401-1 with BBA certificate 87/1898 for the 110 mm PVC-U pipe. Plain ended pipe wall thicknesses: B4001 110 mm x 3 m and B4011 110 mm x 6 m are 3.2 mm; B6001 160 mm x 3 m and B6011 160 mm x 6 m are 4.1 mm; the SN8 160 mm versions B6001 SN8 and B6011 SN8 are 4.7 mm. Socketed pipe socket depths: 70 mm at 110 mm, 95 mm at 160 mm, 110 mm at 200 mm. Both 110 mm and 160 mm ranges come in SN4 and SN8 stiffness. Gradient guidance: for flows under 1 l/s, pipes not exceeding 100 mm nominal bore at gradients not flatter than 1:40 have proved satisfactory; where peak flow exceeds 1 l/s a 100 mm bore may be laid at not flatter than 1:80 provided at least one WC is connected; a 150 mm bore may be laid at not flatter than 1:150 provided at least five WCs are connected. With a high standard of design and workmanship, 1:130 at 100 mm and 1:200 at 150 mm have been used successfully. The guide states that increasing pipe diameter to compensate for insufficient fall is not a satisfactory solution because it reduces velocity and depth of flow and encourages deposits. Also covers bedding materials, trench preparation, ground load protection and inspection chamber assemblies.
- supplier figure RN-JEZX39
Cordek
Filcor expanded polystyrene lightweight structural fill, offered in a range of compressive strength grades to match the loading, from pedestrian to vehicular. Standard sheet or block size 2400 mm long x 1200 mm wide with the depth made to order, minimum depth 25 mm and maximum depth 1200 mm; any shape or profile can be cut, and Cordek hire out a hot wire cutter. Flame retardant grades available. Where Filcor may contact petroleum, hydrocarbons or solvents it must be encapsulated in Puraflex VOC membrane, either on site or supplied pre-wrapped. Water resistant with a long design life, and provides insulation as well as fill.
- supplier figure RN-G9MCD3
FAKRO GB Ltd
FAKRO DXW walk-on flat roof window for terraces and flat roofs, sitting flush with the roof covering, with a reinforced frame, anti-slip coating and a laminated outer pane. Whole-window U-value 0.70 W/m2K and centre-pane glazing Ug 0.5 W/m2K. Glazing build-up 888.44 (1 x ESG, 2 x TVG) - Tg16Ar - 4HT - Tg18Ar - 66.2T, a double-chamber (triple glazed) passive unit with 16mm and 18mm argon-filled cavities and warm-edge spacers. Frame profiles are filled with insulating material.
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FloPlast Limited
FloPlast rainwater flow capacities calculated to BS EN 12056-3, effective roof area based on the Building Regulations value of 0.022 l/s per m2. Outlet at END of run, gutter fixed LEVEL (max flow rate l/s, then BS 12056 rate, then roof area m2 for each): Half Round with 68mm round downpipe 0.92 / 0.82 l/s, 44 / 40 m2; Square Line with 65mm square downpipe 1.70 / 1.53 l/s, 81 / 73 m2; Hi-Cap with 68mm downpipe 2.05 / 1.84 l/s, 98 / 88 m2; Hi-Cap with 80mm downpipe 2.25 / 2.02 l/s, 108 / 97 m2; Niagara ogee with 65mm square 2.40 / 2.16 l/s, 115 / 104 m2; Niagara with 80mm round 2.64 / 2.37 l/s, 127 / 114 m2; XtraFlo with 110mm downpipe 4.30 / 3.87 l/s, 206 / 185 m2. Laying the gutter to a 1:350 fall raises Half Round to 1.17 l/s / 56 m2 and Hi-Cap 68mm to 2.56 l/s / 123 m2. Moving the outlet to the CENTRE of the run roughly doubles capacity: Half Round level 1.80 l/s / 86 m2, Hi-Cap 68mm 3.80 l/s / 182 m2, XtraFlo 8.20 l/s / 393 m2, and at 1:350 fall Half Round 2.60 l/s / 125 m2 and XtraFlo 11.80 l/s / 566 m2. Reduced capacities apply where bends are incorporated. Systems carry BSI Kitemark KM501316 to BS EN 607 (PVC-U eaves gutters), BS EN 12200-1 and BS EN 1462 (brackets); MiniFlo gutter and the painted Cast Iron style range are excluded from the Kitemark.
- supplier figure RN-E1RXPB
Glazing Vision Ltd
Glazing Vision Flushglaze Walk On rooflight, toughened laminated glass designed for regular foot traffic in UK domestic use, tested to uniform loading of 1.5 kN/m2 and concentrated loading of 2.0 kN in accordance with EN 1991-1-1:2002. Span and width both 400mm to 8626mm. Minimum upstand pitch 1 degree (recommended pitch 1 degree for standard units), maximum 70 degrees. Tested at 2000 x 2500mm at 0 degrees: air permeability EN 12207 Class 4 at +600 Pa, water tightness EN 12208 Class 9A at 600 Pa. Security Rating A needs an inner pane of at least 8.8mm PVB laminated glass; Rating B needs at least 9.5mm ionomer laminated glass.
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GRAF UK
EcoBloc Inspect Flex crate, 800 x 800 x 320 mm, void ratio 96%, stackable and inspectable. GRAF's distinguishing claim is that the module accepts inspection cameras and maintenance jetting equipment through the crate, so the system can be checked and cleared rather than sealed and forgotten. Published capacities for the same unit: gross volume 0.205 m3 and net volume 0.199 m3, polypropylene, 8 kg, vertical ultimate compressive strength 340 kN/m2 and lateral 82 kN/m2, and installable to 5 metres depth under heavy loads.
- supplier figure RN-UGFZ49
IKO PLC
IKO Armourshield Plus hexagonal butt bitumen shingle: strip 1000mm long by 318mm wide, a bituminous pitched roofing product typically laid over a boarded deck with a glass fibre underlay.
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K Rend (Kilwaughter Minerals)
Ready to use organic resin thin coat render with silicone resin emulsion and acrylic dispersion, supplied in 25 kg buckets. Coverage by grain size: TC 05 (largest grain 0.5 mm) about 16 m2 per 25 kg bucket or 1.6 kg/m2 by hand and about 20 m2 or 1.3 kg/m2 sprayed; TC 10 (1.0 mm) about 14 m2 or 1.8 kg/m2; TC 15 (1.5 mm) about 10 m2 or 2.5 kg/m2; TC 30 (3.0 mm) about 5 m2 or 5 kg/m2. Classified to BS EN 15824: 2009: water vapour permeability Category V2, water absorption Category W3, adhesion 0.65 MPa, thermal conductivity lambda10 dry 0.83 (P=50%) and 0.93 (P=90%), density approximately 1,800 kg/m3, designation Coating Material DIN 18558 P Org 1. Reaction to fire Class A2-s1,d0. Substrate and air minimum 5 C at application; allow freshly applied basecoats a minimum of 14 days; prime with K Rend Primer TC and allow 24 hours.
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Marley Ltd
Marley western red cedar shingles: 400mm long with random widths 75mm to 350mm, 10mm thick at the butt tapering, minimum pitch 14 degrees, fixed to 38mm battens. Gauge, coverage and laid weight change sharply with pitch. At 75-90 degrees (vertical cladding) maximum gauge 175mm, 3.20 m2 covered per bundle, laid weight 4.0 kg/m2, 5.3 lin.m/m2 of battens. At 22-74 degrees maximum gauge 125mm, 2.28 m2 per bundle, 6.1 kg/m2, 8.0 lin.m/m2 of battens. At 14-21 degrees maximum gauge 95mm, only 1.73 m2 per bundle, 8.1 kg/m2, 10.5 lin.m/m2 of battens. Dropping from a 30 degree roof to a 15 degree roof therefore costs roughly a third more shingles and battens.
- supplier figure RN-A5O3ET
Marshalls
Marshalls' homeowner-level version of its installation guidance, giving the same build-up in plainer numbers. Excavate 150mm across the whole patio area over evenly compacted soil. Lay and compact a sub-base to a consistent 100mm depth, smooth, flat and firm. Mix a bedding of three parts sharp sand to one part cement, wetted to a doughy consistency, and spread it as an even 40mm layer. Dampen each slab before laying so it does not draw water out of the mix too quickly, then bed it down with a rubber mallet so it sits about 15mm into the mortar, leaving 10 to 15mm joints between slabs. Leave the patio to set for at least 24 hours before pointing or any finishing work. Read alongside the fuller Marshalls Installation Guidelines for Concrete Paving, which adds the two constraints this page omits: the 150mm minimum drop below the damp proof course where the paving abuts a building, and the 6m movement joint spacing.
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Marshalls
Marshalls' manufacturer installation specification for concrete paving, Issue 8, January 2023, and the document to quote when a contractor's method is in dispute. Sub-base: a minimum of 100mm for most domestic applications, using well graded 40mm-to-dust Type 1 material, placed in layers not exceeding 75mm, finished to plus 5 / minus 10mm of specified levels; recycled crushed masonry or concrete is acceptable. The finished paving surface, where laid up to an existing structure, must be a minimum of 150mm below the damp proof course to prevent rising damp - the single most commonly ignored figure in domestic patio work. Movement joints at 6m centres where the area is in prolonged direct sunlight, is a large open expanse, or uses a dark colour. Edge restraints go in before the sub-base and must give a consistent vertical face to below the laying course. Rigid laying: a full wet workable mortar bed of 1 part cement to 3 or 4 parts sharp sand, laid 30 to 40mm thick, reducing to about 25mm after tamping; back-priming the units is advised. Joints: minimum 10mm with units at least 22mm thick, filled with a damp mortar of 1 part cement to 4 parts building sand, or a proprietary jointing compound. Dry or semi-dry brushed-in sand/cement mixes must never be used, and butt jointing is not recommended.
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Marshalls
Atlas textured concrete paving, offered as a cost alternative to natural granite in three neutral grey tones. Five plan sizes in two depths, 60 mm and 80 mm, listed against length, width, thickness, approximate unit weight and approximate pack weight per colourway (St Ives, Eaglescliffe and a third grey). Suitable for pedestrian, light and commercial trafficked areas. Selected sizes are also made as Atlas Priora permeable. Marshalls note maximum loading suitability varies by size and depends on install method, bond pattern and sub-base design.
- supplier figure RN-4FQVCR
Marshalls
Modal X Priora permeable concrete paving. Available in a textured finish, eight colours, seven plan sizes, in 60 mm or 80 mm depth, plus three complementary sett sizes in a riven texture. Nibs on the edges of each unit let water drain into the joints and into a prepared sub-base, then to ground or a controlled release to drain, removing the need for point drainage. Marshalls state the edge detail lets units be laid in any direction while still achieving 40% more interlock than standard paving. Example unit: Modal X Pro Priora Textured Riven 240 x 160 x 80 mm, approximate unit weight 8 kg, pack weight 1516 kg, made to order. Marshalls flag that maximum loading suitability does not apply to every size and depends on the install method, bond pattern and sub-base design. A non-permeable version of the same range is available.
- supplier figure RN-ZKZNEQ
Polypipe
Cell data. Polystorm Lite, product code PSM2, 1 m x 0.5 m x 0.4 m high, unit weight 7 kg, cube storage volume 0.19 m3 or 190 litres, surface area 55% perforated, maximum compressive strength 20 tonnes per square metre, 15 cells per pallet. Polystorm, product code PSM1, same 1 m x 0.5 m x 0.4 m size, unit weight 9 kg, storage volume 0.19 m3 or 190 litres, maximum compressive strength 40 tonnes per square metre, 15 per pallet. The range is designed to a 95% void ratio and spans 20 to 80 tonnes per square metre load bearing capacity. Ancillaries include a basic silt trap PSMST160, an advanced 15 litres/sec silt trap PSMSTA160/15, round cover and frame UG501, square UG502, 450 mm silt trap lid and frame UG512 and a 460 mm lockable plastic cover and frame UG511.
- supplier figure RN-S5DFMS
Polypipe Civils and Green Urbanisation
Polystorm geocellular range for retention, attenuation and infiltration. Headline figures: 95% void ratio compared with traditional aggregate, load bearing strength from 20 to 83 tonnes/m2 across the range, 60 plus years design life, 100% recyclable. Variants listed are Polystorm R, Access, Inspect, Deep, Xtra, Biomat, Catchpit, Silt Trap, Low-Flow Control Unit and accessories, with the deeper units aimed at greater burial depths.
- supplier figure RN-6C5V36
Ronseal
Manufacturer coverage and method data for an exterior wood paint. Coverage is up to 12 m2 per litre, double the 6 m2 per litre of the same maker's fence treatment because the substrate is planed rather than sawn. It is touch dry in one hour with four hours between coats. No primer is required. Ronseal's stated preparation rule is 240 grit for a light sand where the old paint is sound, and 120 grit where the paint is cracked or flaking. The protection claim is 10 years.
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Ronseal
Manufacturer application data for Ronseal Fence Life Plus. Coverage is up to 6 m2 per litre, far lower than an interior emulsion, which is the number to use when estimating for a rough sawn fence. Ronseal states the treatment lasts up to 5 years. It cannot be applied in the rain and needs a warm dry day with temperatures above 10C, since cold weather stops it drying properly and it can wash off. The manufacturer instruction is to overlap each pass by 50 per cent for proper coverage.
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Ronseal
Manufacturer data for a water based decking oil. Coverage is 6.4 m2 per litre. It is rainproof in 90 minutes and touch dry in 90 minutes, with four hours before a second coat. Ronseal states it stops the deck turning grey or splitting. The application instruction is to start in the furthest corner and brush along the length of the boards, working 3 to 4 boards at a time to avoid overlap marks, which is the technique that prevents visible lap lines on a deck.
- supplier figure RN-ZIVJ9D
Russwood
Home grown Scottish larch cladding. Density medium, classified by BS EN 350-2 at approximately 556 kg/m3 at a moisture content of approximately 18%. Natural durability Class 3 to BS EN 350-2, improved by grading that removes non durable sapwood from the working face; live knots only up to 50 mm diameter, boards sapwood free on exposed faces. Standard profiles include RW102 and RW014 at 25 mm thickness in 66 mm and 140 mm standard widths, intended for board on board and other simple face fixed arrangements and not recommended for tongue and groove or secret fixing.
- supplier figure RN-TQ48SK
Sunsquare Ltd
Sunsquare skylight range, made in Bury St Edmunds. SkyView rooflight: U-values as low as 0.5 W/m2K, non-fragile glazing tested to ACR[M]001:2014, electric ventilation options; a fire-rated SkyView with CERTIFIRE certification is also offered. Horizon external walk-on glass roof panels for terraces: load capacities up to 5.0 kN/m2 uniformly distributed and 4.5 kN concentrated, U-value 0.94 W/m2K. Internal walk-on floorlights: anti-slip glass to British standards for wet areas, U-values as low as 0.5 W/m2K, 99% UV filtering. Pyramid multi-pane roof lantern: from GBP 1,198 excluding VAT, standard sizes from 800 x 800mm, slim aluminium frame, U-values as low as 0.5 W/m2K, 10 year frame warranty, optional self-cleaning glass. Aero electric roof access rooflight opens fully to 90 degrees; Aero Pyramid opens to 30 degrees.
- supplier figure RN-HJRKJO
Swisspearl (formerly Cembrit)
Swisspearl B5 fibre cement corrugated roofing sheet, the modern replacement for 3 inch corrugated sheets on older garages and equine buildings. Sheet thickness 6mm, cover width 1020mm, average weight 11.7 kg/m2. Twelve lengths from 4 ft 6 in to 10 ft 6 in, with matching translucent sheets for daylight. Available uncoated natural grey or in 6 colours using a 3-part painting process. Ridges, bargeboards, finials, fixings and eaves fillers complete the range.
- supplier figure RN-B7B38R
Swisspearl (formerly Cembrit)
Swisspearl B7 fibre cement corrugated roofing sheet: 6mm thick, 1150mm wide, in FS, CO, HO and PCO variants, average weight 13.4 kg/m2, noticeably heavier per square metre than the smaller-profile B5 at 11.7 kg/m2. Usable as roofing or as part of a ventilated facade, with reinforcement strips, mitred corners and pre-punched holes available on some types.
- supplier figure RN-G11A2A
Swisspearl (formerly Cembrit)
Swisspearl Cemsix corrugated fibre cement sheet: 6mm thick, 1086mm width, multiple lengths, available in natural grey or 4 colours from a 3-part colouring process (7 colours quoted for the coated range). The whole Swisspearl system is covered by BBA Agrement Certificate 03/4049 and is guaranteed for 30 years durability and 10 years colour stability.