How to Repair Bedroom Window Sill

Fig.1 Pen damage

By Gary Boutin

Supplies and Tools:
Interior semi-gloss white paint
Mud knife 6-inch
Paint tray, brush and painting roller-small
Painters tarp 
Pre-mixed joint compound
Primer latex white
Tub and Tile Kitchen and Bath Sealant 

I was called by a Mr. Applehumber in Santa Clarita, California. They were selling their homes and moving up to Colorado. After the Realtor checked their beautiful home, she requested a huge laundry list of repairs. Jim wanted all the window sill to be repaired.

This post shows the ten steps to repair bedroom window sills. 

Step 1: Look at the problem, turns out all of Mr. Applehumber bedroom window sills were damaged. Above Fig.1 shows that some had little pen holes pushed inside the windows sills. Fig.2 shows that some had broken edges were the surface was scarred with edge damage.

Fig.2 Window sill damage

Step 2: Fig.3 shows that some sill had been dug with a pencil or a pen. Fig.4 shows some of the plaster damage was caused by wood shrinkage and there are many other reasons for ground movement, which causes the foundation to shift or settle.

Fig.3 Corner bead damage

Fig.4 Weathered 
away damage

Step 3: The first step to repairing these damages is to start applying joint compound to the damaged areas. Fig.5 shows a 6-inch mud knife applying mud to the pen holes in the bedroom sill.

Fig.5 The scraper with mud

Step 4: Fig.6 shows the window sill edge is being filled with joint compound.

Fig.6 Fill in damage

Step 5: Fig.7 and fig.8 shows the Tub and Tile Kitchen and Bath Sealant will be used to fill any crack near the window and give the window sill more protection.

Fig.7 Fill in cracks

Fig.8 Tub tile sealant

Step 6: Fig.9 shows the application of sealant to the windows edge. This type has a special ingredient that resist mold.

Fig.9 Edges sealant

Step 7: Fig.10 shows that the window sill must have a tarp on the floor to protect the flooring. For this job a blue plastic tarp was used.

Fig.10 Paint roller

Step 8: Fig.11 shows that after the window sill is repaired, caulked the last step to paint it. Use paint primer on the window sill so the so the paint seals the repairs. Fig.12 show the Salmon bedroom color paint that will be used over the latex primer. 

Fig.11 Brush primer

Fig.12 Customer paint

Step 9: Fig.13 shows that the window sill is now painted with the bedroom color paint. 

Fig.13 Final coat

Step 10: Fig.14 shows that the area has clean sharp lines on the window sill.

Fig.14 Job Finished

Update: DIY Advisor has New blogs check them today:

• Handyman Blog: DIY Advisor
• DIY Advisor Sitemap
• Food Blog: From Kiwis To Pistachios
• Food Blog Sitemap
• Tool Blog: DIY Advisor Toolbox
• Tool Blog Sitemap
• Artwork Blog: Light in Dark Artwork
• Artwork Blog Sitemap
• Class-A Tests: DIY Class-A Drivers License Tests
• Class-A Tests Sitemap: Class-A Sitemap
• DIY Poem: DIY Poem Meter Blog
• DIY Poem Sitemap: DIY Sitemap

• Cookie Alert: European Union laws requires that you know that this blog uses cookies. If you are concerned about this please click here to see how Google uses this information.

Note: The DIY Advisor assumes no liability for omissions, errors or the outcome of any jobs. The reader must always exercise reasonable caution, follow current codes and regulations that may apply, and is urged to consult with a licensed contractor if in doubt about any steps on these posts. All names were changed to protect client's privacy. DIY Advisor. Reproduction of site content including photos without permission prohibited. All rights reserved. © Copyright 2011-