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16mm Square uPVC Replacement Fascia Board 5m | Showcase Plastics Essex

This 16mm replacement fascia board is a solid square-edge uPVC board in 5m lengths, fixed directly to rafter ends for full fascia replacement and new builds – The structural fascia board for full replacement and new rooflines.

This is a 16mm thick, square-edged, solid uPVC replacement fascia board in 5 metre lengths. It is designed to fix straight onto rafter ends after the old timber fascia has been removed — or on new work where there is no timber to cap over.

Use this board when you need strength, not a thin cover. At 16mm it is self-supporting enough to take gutter brackets into the board and rafters. It is also used as a bargeboard on gable ends.

If the existing timber fascia is still solid and you only want a new face, use our 9mm square capover / capping board instead.

Also searched as: 16mm fascia board, replacement fascia, uPVC fascia 5m, square edge fascia, full replacement fascia, bargeboard, new build fascia, 16mm PVC fascia Essex.

Price range: £1.00 through £200.00

Product SKU: K16

Product Description

16mm replacement vs 9mm capover — which do I buy?

16mm replacement (this product) 9mm capover / capping board
Job Strip old fascia or new build Cover sound existing timber
Thickness 16mm solid 9mm
Fixes to Rafter ends Face of existing timber
Backing timber Not required Required and must be sound
Gutter brackets Through board into rafters Through board into old timber
Best for Rot, failed timber, new roofs, bargeboards Fast refurb of good timber
Disruption Higher (strip-out) Lower

Choose 16mm if: timber is rotten, loose, undersized, or you are building new eaves.
Choose 9mm if: the old board is firm, dry and well fixed – see this product here.

Product specification

Attribute Detail
Product Square edge replacement fascia board
Material uPVC (unplasticized PVC)
Thickness 16mm
Profile Square edge — clean, modern face
Length 5 metres (approx. 16ft 5in)
Construction Solid (not foamed hollow-core wording — solid 16mm profile)
Typical widths Common UK widths include 150mm, 175mm, 200mm, 225mm, 250mm, 300mm and wider boards on request
Double-ended boards 355mm and 405mm are double-ended (usable from either edge — ideal for deep eaves and box ends)
Finish Colour-stable uPVC; woodgrain where stocked
Maintenance No painting, no treating, wipe clean
Rot / warp Will not rot like timber; UV-stable colour range
Uses Fascia, bargeboard, box ends, gable finishes
Guarantee Up to 20 years (confirm current range terms)
Supply Showcase Plastics — Maldon, Essex — trade & DIY

How to pick width: measure from the underside of the roof covering / eaves tray down to the intended gutter line. Most two-storey houses take 175mm or 200mm. Bungalows often take 150mm. Deep overhangs and some boxed eaves need 225mm, 250mm, 300mm or the 355mm / 405mm double-ended boards.

Select colour and width on this page, or call if you need a size that is not listed.

What a 16mm replacement fascia actually does

The fascia is the vertical board at the eaves. It:

  • finishes the rafter ends
  • carries the gutter
  • closes the roof edge against weather and birds
  • lines up with the soffit underneath

Timber fascia fails because of trapped moisture, peeling paint and failed fixings. A 16mm uPVC replacement board removes that cycle: no paint, no rot, stable colour, and a square edge that looks sharp against modern windows and anthracite gutters.

On gables the same board is run as a bargeboard. On corners and deep soffits, wider and double-ended boards let you box the eaves without splicing several narrow pieces.

Why buy 16mm fascia from Showcase Plastics

  • Local trade counter in Maldon — see the board before you load the van
  • 20+ years in windows, doors, roofline and building plastics
  • Supply only or supply & fit
  • Matching soffits, gutters, square corners, joints, pins and trims
  • Advice on 9mm vs 16mm so you do not buy the wrong thickness
  • Estimate within 24 hours via the online estimate tool
  • Delivery across Essex and London borders, or collection from CM9 4XL

Call 01621 842 000 · WhatsApp 07949 280 147 · sales@showcaseplastics.co.uk
Mon–Fri 7am–5pm · Sat 8am–12pm
Unit 6, Heybridge Industrial Estate, The Causeway, Maldon, Essex CM9 4XL.

Areas we supply and fit

Maldon, Heybridge, Chelmsford, Colchester, Witham, Braintree, Burnham-on-Crouch, South Woodham Ferrers, Billericay, Basildon, Rayleigh, Southend, Romford and CM, CO, SS, RM, IG postcodes – see full list here.

How to install 16mm square replacement fascia (overview)

Not a full method statement — use a competent fitter or our supply-and-fit team.

  1. Strip the old timber fascia, gutter and any failed soffit. Check rafter ends for rot; repair before boarding.
  2. Set a line for the new fascia so gutter fall is correct (typically 1:350 or as specified).
  3. Fix 16mm board to rafter ends with suitable screws / specified fixings. Do not rely on 9mm-style pins alone into thin meat — this is a structural board.
  4. Joints: use colour-matched joint trims. Leave manufacturer expansion gaps, especially on dark colours.
  5. Corners: use square corner trims (we stock 500mm square corners to match this profile).
  6. Soffit: support the soffit into the fascia groove / trim as designed. Ventilated soffit where the roof requires eaves ventilation.
  7. Gutter brackets: fix through the 16mm fascia into rafter ends or as the gutter system specifies.
  8. Bargeboards: same board up the gable; finish with a ridge cap / joiners as required.
  9. Wipe down. No primer. No paint.

Usually add to the same order: soffits, square corners, joint covers, guttering, downpipes, eaves vents / ventilation strip, polytop pins or screws, sealant.

Double-ended 355mm and 405mm boards

355mm and 405mm boards are double-ended. That means both long edges can be used as the finished bottom edge. Use them for:

  • deep boxed eaves
  • wide gable / barge details
  • covering a deep old timber line in one board
  • reducing joints on large detached houses

Ask us to confirm which widths are double-ended in the colour you want.

Colours

Choose the colour variation on this page. Typical roofline colours include white, anthracite grey, black / black ash, golden oak and rosewood / woodgrain (stock dependent).

Match fascia, soffit, gutter and window colour on the same elevation. Dark boards expand more in sun — plan joints.

Trade and DIY

  • Trade: 5m lengths, local backup, accessories off the same shelf
  • DIY: we will check your measurements and tell you if you should be on 9mm instead
  • Landlords / new builds: specify 16mm where Building Control / the roof design needs a structural fascia.

Delivery, collection, estimates

Add this product to an online estimate with soffits and gutters. We aim to return figures within 24 hours.
Collect from Maldon or ask for delivery when you need the boards on site.

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Frequently asked questions

Is 16mm fascia the same as 18mm?
Some brands sell 18mm replacement board. This product is 16mm solid square-edge. It is the full-replacement thickness we stock for fixing to rafters — not a 9mm capover.

Can I use 16mm over existing timber?
You can overboard in some details, but this board is made to replace timber and fix to rafters. For covering sound timber, 9mm capover is cheaper and designed for that job.

Will it hold guttering?
Yes, when fixed correctly to rafter ends. Do not hang a full gutter off an unsupported 9mm-style fix.

Can I use it as a bargeboard?
Yes. Same 16mm square board is commonly used on gables.

What do double-ended 355mm and 405mm mean?
Both edges are finished so you can use either long edge as the visible bottom — useful on deep eaves.

Do I need to paint it?
No.

How many 5m boards?
Measure each elevation, add gables, corners and at least 10% waste, divide by 5. Send us a sketch if you want a take-off check.

Do you fit as well as supply?
Yes — supply & fit across our Essex / London-border area.

Collection or delivery?
Both. Counter at Heybridge Industrial Estate, Maldon CM9 4XL.

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