- Companies
- Installers
- Welwyn
- Sealfix Cladding Systems Limited
Sealfix Cladding Systems Limited
- Company number
- 08150785
- Incorporated
- 20 Jul 201214 years trading
- Registered office
- Robbery House, Robbery Bottom Lane, Welwyn, Hertfordshire, AL6 0UW
- Nature of business
- Other construction installation
Sealfix Cladding Systems Limited is a 14-year-old private limited company registered in Welwyn, company number 08150785, one of the UK's installation companies (insulation, lifts, shutters and similar). Its next accounts are due at Companies House on 30 April 2028, and the CT600 for the period to 31 July 2027 is due at HMRC on 31 July 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £15K (+227.4%) on the year before, to £22K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £87K against £65K owed within a year: 1.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2026 | £22K | £49K | £87K | £65K | 1 |
| 31 Jul 2025 | £6,786 | £2,698 | £41K | £34K | 1 |
| 31 Jul 2024 | £16K | £8,031 | £63K | £46K | 1 |
| 31 Jul 2023 | -£7,757 | £54K | £88K | £92K | 1 |
| 31 Jul 2022 | -£50K | £5,041 | £34K | £78K | 1 |
| 31 Jul 2021 | -£45K | £13K | £41K | £80K | 1 |
| 31 Jul 2020 | -£12K | £46K | £76K | £79K | 1 |
| 31 Jul 2019 | -£25K | £1,781 | £13K | £37K | 1 |
| 31 Jul 2018 | -£22K | £19K | £56K | £78K | 1 |
| 31 Jul 2017 | £8,221 | £48K | £85K | £77K | 1 |
Who runs and owns Sealfix Cladding Systems Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** M*** | Director | Jul 2012 |
Person with significant control
Where Sealfix Cladding Systems Limited is registered
The registered office is in Welwyn (AL6), in the Welwyn Hatfield local authority area, East of England. Show AL6 0UW on a map.
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- LMC Highway Design LtdCivil engineering
- Fox Huhu Trading LimitedBuilders
- Enclosure Zoolutions LtdProperty developers
- G.I. Installation Services LimitedBuilders
What happens if Sealfix Cladding Systems Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 April 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2028 to 31 May 2028 | £150 |
| 1 to 3 months late | 1 Jun 2028 to 31 Jul 2028 | £375 |
| 3 to 6 months late | 1 Aug 2028 to 31 Oct 2028 | £750 |
| More than 6 months late | From 1 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2028 | £200 |
| 3 months late | 31 Oct 2028 | another £200 |
| 6 months late | 31 Jan 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2029 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 08150785
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 July 2012 (14 years ago)
- Registered office
- Robbery House, Robbery Bottom Lane, Welwyn, Hertfordshire, AL6 0UW
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2026
- Last confirmation statement
- 20 July 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Welwyn
Other active installation companies (insulation, lifts, shutters and similar) registered in Welwyn.
- Elite Kitchen Developments Limited2022
- Luxe Home Designs & Refurbishments Ltd2023
- Mnic Properties Ltd2017
All installation companies (insulation, lifts, shutters and similar) in Welwyn · All trades in Welwyn · Installers across the UK
Frequently asked questions
When are Sealfix Cladding Systems Limited's accounts due?
Sealfix Cladding Systems Limited's next accounts are due at Companies House by 30 April 2028 (in 566 days), covering the period to 31 July 2027.
When is Sealfix Cladding Systems Limited's CT600 due?
The CT600 for the period to 31 July 2027 is due at HMRC by 31 July 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2028.
Is Sealfix Cladding Systems Limited still trading?
Sealfix Cladding Systems Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Sealfix Cladding Systems Limited do?
Sealfix Cladding Systems Limited is registered under Other construction installation (SIC 43290).
How old is Sealfix Cladding Systems Limited?
Sealfix Cladding Systems Limited was incorporated on 20 July 2012, 14 years ago.
Who runs Sealfix Cladding Systems Limited?
Sealfix Cladding Systems Limited has 1 active director, the longest-serving appointed in Jul 2012. Their names and service addresses are on the Companies House register.
Who owns Sealfix Cladding Systems Limited?
One person or company has significant control of Sealfix Cladding Systems Limited: an individual (owns 75% or more of the shares).
What is the penalty if Sealfix Cladding Systems Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Sealfix Cladding Systems Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.