Greenhouse glazing, 4mm twinwall polycarbonate

FREE NEXT DAY DELIVERY! Twin wall polycarbonate is virtually unbreakable and easy to handle, so its safe for the whole family. Its also easy to cut with a Stanley knife which makes it ideal for replacement glazing. It provides good insulation from frost and maintains a more even temperature for better plant growth. Twin wall polycarbonate also diffuses light to prevent scorching. With good light transmission properties it is no surprise that this versatile glazing material is so popular in greenhouse glazing.

Prices fixed until Tuesday 14th February.

• All greenhouse accessory prices include VAT.
  

  ORDER BY PHONE: You can pay with a debit or credit card. To order phone us free on 0800 9777 828 seven days a week.

  ORDER ONLINE: You can pay with a debit or credit card. We also accept payment by the latest high security password protected online systems, including Verified by VISA and Mastercard SecureCode.

  METHODS OF PAYMENT: We accept most major credit cards and debit cards including VISA, MasterCard, VISA Delta, VISA Debit, MasterCard Debit, Electron, Solo, Switch, Maestro and UK Maestro. We also accept secure online payments using Verified by VISA or MasterCard SecureCode and Google Checkout. We do not accept American Express or Diners Club cards at present.

• FREE NEXT DAY DELIVERY or delay the delivery until you are ready then YOU TELL US WHICH DAY TO DELIVER
• We always have a large stock of this item available so we can always despatch your order immediately.
• Please provide at least one DAYTIME PHONE NUMBER where the driver can contact you on the day of delivery if needed.
  

  TELL US WHICH DAY: If you want next day delivery you need to tell us when to deliver. We cannot deliver unless you tell us which day. You can select a delivery day when you order online or if you order by phone. Alternatively, you can order without specifying a day and request delivery later by phone or email.

  NEXT DAY DELIVERY: Next day delivery is available throughout mainland England, Wales and Southern Scotland. We deliver the next working day if requested before 10.00am. For example, to request delivery on Monday just contact us before 10.00am on Friday.

  DELAYED DELIVERY: You can request a delivery day weeks in advance or you can wait to choose a delivery day later. We can deliver on any weekday of your choice - just contact us before 10.00am the day before.

  SCOTLAND: Delivery is normally next day to all mainland addresses in DD1-7, DD10-11, DG, EH, FK1-17, G, KA, KY, ML, PA1-8, PH12-14 and TD postcodes. The next day service is not available elsewhere in Scotland. To any other Scottish address delivery is normally within 3-5 working days after order. In areas where the 3-5 day delivery service operates it is not possible to choose a specific day for delivery.

  IRELAND AND OFFSHORE ISLANDS: The next day service is not available in these areas. Delivery is normally within 3-5 working days after order. It is not possible to choose a specific day for delivery. The 3-5 day service is available to Northern Ireland, the Scottish Isles, the Isle of Wight, the Isle of Man and the Scilly Isles. We are currently unable to deliver to the Channel Islands or the Republic of Ireland.

  NO HIDDEN DELIVERY CHARGES: The price you see is the price you pay. Our prices include all delivery charges - unlike most others we do not add delivery charges during the checkout process. However the prices may vary in different areas. You need to enter the first half of your postcode to see the correct prices in your local area. If you have not already done so click here to enter the first half of your postcode.

• Virtually unbreakable
• Good insulation from frost
• Maintains a more even temperature than glass
• Diffuses light to prevent scorching
• High light transmission properties
• Easily cut to any shape or size with a Stanley knife
• Easily fitted with standard greenhouse glazing clips
• Easily overlapped at joins with standard greenhouse overlap clips
• Existing clips and gaskets can be reused
  

  TWIN WALL POLYCARBONATE GREENHOUSE GLAZING

  Twin wall polycarbonate glazing is far stronger than the flimsy single skin polycarbonate sheeting supplied with some greenhouses. Twin wall polycarbonate is often used in conservatory roof glazing because it is a stable and long lasting glazing material which does not significantly alter with the passage of time.

• Grade A polycarbonate is brand new and free from defects. It is stored in the original packaging.
• Glazing clips, also known as "W" clips because of their shape. These are galvanized wire spring clips to retain the glazing at each side. Six clips are normally required for each 617mm x 1215mm polycarbonate sheet.
• Overlap clips, also known as "S" clips because of their shape. These are used whenever glazing sheets are overlapped. Two clips are normally required for each overlapping sheet.
• A choice of butyl rubber or double sided foam glazing strips are available as replacements for perished old gaskets. Both can be easily fitted to any aluminium or wooden greenhouse frame so there is no need to hunt for the right type of gasket. Both butyl rubber and double sided foam are adhesive on both sides which makes them ideal for use with polycarbonate glazing. Butyl rubber has similar properties to putty and it is often described as "putty on a roll". It is less rigid than foam tape so it is harder to fit in a neat straight line but it is more adhesive and impervious to water. Butyl rubber is best for applications where durability is more important than appearance. Foam tape is better if appearance is more important and also for people who prefer easier installation.

• We measured some typical greenhouses to give you an idea how much glazing your greenhouse may need. Please note that the glazing for each make and model of greenhouse varies slightly so you should measure your own greenhouse before ordering.
• Most basic greenhouses are designed around horticutural glass sizes. Horticultural glass is available in 24" x 24" (610mm x 610mm) or 24" x 18" (610mm x 457mm). The glazing bar spacing is therefore designed to suit 24" (610mm) wide glazing. Polycarbonate is cut slightly wider than glass to fit more tightly so our 617mm wide sheets are the ideal width
  

  EXAMPLE: A typical 6' x 8' greenhouse requires 25 sheets 617mm x 1215mm

  
  
• Roof glazing requires 8 sheets 617mm wide x 1140mm long
• Wall glazing requires 14 sheets 617mm wide x 1215mm long
• Gable glazing requires 3 sheets 617mm wide x 1140mm long
  

  EXAMPLE: A typical 6' x 4' greenhouse requires 17 sheets 617mm x 1215mm

  
  
• Roof glazing requires 4 sheets 617mm wide x 1140mm long
• Wall glazing requires 10 sheets 617mm wide x 1215mm long
• Gable glazing requires 3 sheets 617mm wide x 1140mm long

• In the examples above the sheets used to glaze the gables need to be cut into triangular shapes. If you still have the original instructions these should include a glazing schedule with the exact size of each pane. Even if you have no instructions you can measure either the existing glass or the greenhouse frame. Most of the panels are the same sizes so detailed measurements for each individual sheet are not normally required.
• In the examples above the sheets used to glaze the roof and walls need to be cut to suit any roof vents or louvres or to glaze the door. These cuts are simple 90 degree cuts. If you still have the original instructions these should include a glazing schedule with the exact size of each pane. Even if you have no instructions you can measure either the existing glass or the greenhouse frame. Most of the panels are the same sizes so detailed measurements for each individual sheet are not normally required.

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